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Do you thrive on tackling complex challenges? Are you passionate about creating impactful solutions that drive commerce forward? Do you believe in encouraging and elevating those around you? Then this position as Frontend Engineer might be something for you!About KustomKustom, formerly known as Klarna Checkout (KCO), is the Nordic market leader in digital checkout solutions. Today, they support over 24,000 merchants across more than 170 countries, providing a streamlined checkout experience. They offer localized solutions in 18 markets, tailored to specific languages, currencies, and payment methods. No matter where businesses operate, they deliver a checkout experience that meets the needs of both merchants and shoppers - driving growth globally.About the positionAs a Frontend Engineer at Kustom, you will be responsible for designing and implementing user interfaces using modern JavaScript frameworks. You will work closely with their designers, product managers and backend engineers to deliver seamless and engaging web applications that optimize user experience and drive conversion.In this role, you will develop and evolve Kustom’s checkout products, from the complete checkout experience to embeddable components that integrate into a wide range of online stores. You will also play an important role in developing Kustom’s UI library, Morpheus, and the shared design language that brings Kustom’s products together. The role comes with significant responsibility for the performance, reliability, and observability of business-critical code, while also promoting best practices in testing, accessibility, and security. You will contribute to the team’s technical direction through code reviews, mentoring, and close collaboration with other engineers.As a key member in the Checkout team, you'll be at the forefront of crafting exceptional digital experiences. We're not just looking for someone to write code - we're seeking a creative problem-solver who can transform ideas into intuitive, cutting-edge interfaces for Kustom’s users. Your expertise will help shape the future of their products, making complex flows feel effortless.Your main responsibilities:

• Frontend development of checkout products, from full user experience to embeddable components.
• Contribute to the UI library and shared design language.
• Own the performance, reliability, and observability of code for business critical applications.
• Work with testing, security and foster best practises in the team.
• Mentor other engineers, review code and contribute to the technical direction of the frontend.

About youTo be successful in this position we believe that you have a Bachelor’s degree in Computer Science, Engineering or similar. You have deep expertise in modern JavaScript and TypeScript frameworks and strong experience with React. You have a solid foundation with HTLM, CSS and responsive, accessible UI. You have experience integrating with backend APIs and data flows. You have previous experience building web applications that operates different markets, and are familiar with iframe and cross-origin integration patterns and how to safely run a piece of UI inside another product. Lastly, we believe that you have experience from fintech, e-commerce, SaaS or consulting environments to be a good fit.As a person, we believe that you have strong communication skills and thrive in a business oriented, dynamic environment. You enjoy working independently at times, but also enjoy collaborating with rest of the team. You are fluent in English and are able to work from Kustom’s Stockholm office.Important for the position:

• Bachelor’s degree in Computer Science, Engineering or similar.
• Deep expertise in modern JavaScript and TypeScript frameworks.
• Strong experience working with React.
• Solid foundation in HTLM, CSS and responsive, accessible UI.
• Experience integrating with backend APIs and dataflows.
• Previous experience building web applications that operates different markets.
• Familiar with iframe and cross-origin integration patterns.
• Experience from fintech, e-commerce, SaaS or consulting environments.

Kustom’s offerAt Kustom, you'll have the opportunity to make a real impact on their users' daily interactions. If you're passionate about creating high-performance web applications and thrive on turning ambitious design concepts into reality, we want to hear from you.Kustom offers a competitive benefits package designed to support both your financial security and overall wellbeing. This includes a comprehensive pension package with both national and occupational pension contributions, extensive health insurance, long-term illness protection, and flexible salary exchange options. Employees also receive an annual wellness allowance of 3,000 SEK to support activities that keep them healthy and energized. In addition, you get an extra day off when major holidays, such as Christmas Eve or New Year’s Eve, fall on a weekend.Practical detailsStart: as agreed upon.Extent: full time, 100%.Location: Stockholm.Salary: as agreed upon.Do you find the position as Frontend Engineer interesting? We at Needo are looking forward hearing from you!We are only able to process applications sent through our application form.

Do you thrive on tackling complex challenges? Are you passionate about creating impactful solutions that drive commerce forward? Do you believe in encouraging and elevating those around you? Then this position as Frontend Engineer might be something for you!About KustomKustom, formerly known as Klarna Checkout (KCO), is the Nordic market leader in digital checkout solutions. Today, they support over 24,000 merchants across more than 170 countries, providing a streamlined checkout experience. They offer localized solutions in 18 markets, tailored to specific languages, currencies, and payment methods. No matter where businesses operate, they deliver a checkout experience that meets the needs of both merchants and shoppers - driving growth globally.About the positionAs a Frontend Engineer at Kustom, you will be responsible for designing and implementing user interfaces using modern JavaScript frameworks. You will work closely with their designers, product managers and backend engineers to deliver seamless and engaging web applications that optimize user experience and drive conversion.In this role, you will develop and evolve Kustom’s checkout products, from the complete checkout experience to embeddable components that integrate into a wide range of online stores. You will also play an important role in developing Kustom’s UI library, Morpheus, and the shared design language that brings Kustom’s products together. The role comes with significant responsibility for the performance, reliability, and observability of business-critical code, while also promoting best practices in testing, accessibility, and security. You will contribute to the team’s technical direction through code reviews, mentoring, and close collaboration with other engineers.As a key member in the Checkout team, you'll be at the forefront of crafting exceptional digital experiences. We're not just looking for someone to write code - we're seeking a creative problem-solver who can transform ideas into intuitive, cutting-edge interfaces for Kustom’s users. Your expertise will help shape the future of their products, making complex flows feel effortless.Your main responsibilities:

• Frontend development of checkout products, from full user experience to embeddable components.
• Contribute to the UI library and shared design language.
• Own the performance, reliability, and observability of code for business critical applications.
• Work with testing, security and foster best practises in the team.
• Mentor other engineers, review code and contribute to the technical direction of the frontend.

About youTo be successful in this position we believe that you have a Bachelor’s degree in Computer Science, Engineering or similar. You have deep expertise in modern JavaScript and TypeScript frameworks and strong experience with React. You have a solid foundation with HTLM, CSS and responsive, accessible UI. You have experience integrating with backend APIs and data flows. You have previous experience building web applications that operates different markets, and are familiar with iframe and cross-origin integration patterns and how to safely run a piece of UI inside another product. Lastly, we believe that you have experience from fintech, e-commerce, SaaS or consulting environments to be a good fit.As a person, we believe that you have strong communication skills and thrive in a business oriented, dynamic environment. You enjoy working independently at times, but also enjoy collaborating with rest of the team. You are fluent in English and are able to work from Kustom’s Stockholm office.Important for the position:

• Bachelor’s degree in Computer Science, Engineering or similar.
• Deep expertise in modern JavaScript and TypeScript frameworks.
• Strong experience working with React.
• Solid foundation in HTLM, CSS and responsive, accessible UI.
• Experience integrating with backend APIs and dataflows.
• Previous experience building web applications that operates different markets.
• Familiar with iframe and cross-origin integration patterns.
• Experience from fintech, e-commerce, SaaS or consulting environments.

Kustom’s offerAt Kustom, you'll have the opportunity to make a real impact on their users' daily interactions. If you're passionate about creating high-performance web applications and thrive on turning ambitious design concepts into reality, we want to hear from you.Kustom offers a competitive benefits package designed to support both your financial security and overall wellbeing. This includes a comprehensive pension package with both national and occupational pension contributions, extensive health insurance, long-term illness protection, and flexible salary exchange options. Employees also receive an annual wellness allowance of 3,000 SEK to support activities that keep them healthy and energized. In addition, you get an extra day off when major holidays, such as Christmas Eve or New Year’s Eve, fall on a weekend.Practical detailsStart: as agreed upon.Extent: full time, 100%.Location: Stockholm.Salary: as agreed upon.Do you find the position as Frontend Engineer interesting? We at Needo are looking forward hearing from you!We are only able to process applications sent through our application form.

Do you thrive on tackling complex challenges? Are you passionate about creating impactful solutions that drive commerce forward? Do you believe in encouraging and elevating those around you? Then this position as Frontend Engineer might be something for you!About KustomKustom, formerly known as Klarna Checkout (KCO), is the Nordic market leader in digital checkout solutions. Today, they support over 24,000 merchants across more than 170 countries, providing a streamlined checkout experience. They offer localized solutions in 18 markets, tailored to specific languages, currencies, and payment methods. No matter where businesses operate, they deliver a checkout experience that meets the needs of both merchants and shoppers - driving growth globally.About the positionAs a Frontend Engineer at Kustom, you will be responsible for designing and implementing user interfaces using modern JavaScript frameworks. You will work closely with their designers, product managers and backend engineers to deliver seamless and engaging web applications that optimize user experience and drive conversion.In this role, you will develop and evolve Kustom’s checkout products, from the complete checkout experience to embeddable components that integrate into a wide range of online stores. You will also play an important role in developing Kustom’s UI library, Morpheus, and the shared design language that brings Kustom’s products together. The role comes with significant responsibility for the performance, reliability, and observability of business-critical code, while also promoting best practices in testing, accessibility, and security. You will contribute to the team’s technical direction through code reviews, mentoring, and close collaboration with other engineers.As a key member in the Checkout team, you'll be at the forefront of crafting exceptional digital experiences. We're not just looking for someone to write code - we're seeking a creative problem-solver who can transform ideas into intuitive, cutting-edge interfaces for Kustom’s users. Your expertise will help shape the future of their products, making complex flows feel effortless.Your main responsibilities:

• Frontend development of checkout products, from full user experience to embeddable components.
• Contribute to the UI library and shared design language.
• Own the performance, reliability, and observability of code for business critical applications.
• Work with testing, security and foster best practises in the team.
• Mentor other engineers, review code and contribute to the technical direction of the frontend.

About youTo be successful in this position we believe that you have a Bachelor’s degree in Computer Science, Engineering or similar. You have deep expertise in modern JavaScript and TypeScript frameworks and strong experience with React. You have a solid foundation with HTLM, CSS and responsive, accessible UI. You have experience integrating with backend APIs and data flows. You have previous experience building web applications that operates different markets, and are familiar with iframe and cross-origin integration patterns and how to safely run a piece of UI inside another product. Lastly, we believe that you have experience from fintech, e-commerce, SaaS or consulting environments to be a good fit.As a person, we believe that you have strong communication skills and thrive in a business oriented, dynamic environment. You enjoy working independently at times, but also enjoy collaborating with rest of the team. You are fluent in English and are able to work from Kustom’s Stockholm office.Important for the position:

• Bachelor’s degree in Computer Science, Engineering or similar.
• Deep expertise in modern JavaScript and TypeScript frameworks.
• Strong experience working with React.
• Solid foundation in HTLM, CSS and responsive, accessible UI.
• Experience integrating with backend APIs and dataflows.
• Previous experience building web applications that operates different markets.
• Familiar with iframe and cross-origin integration patterns.
• Experience from fintech, e-commerce, SaaS or consulting environments.

Kustom’s offerAt Kustom, you'll have the opportunity to make a real impact on their users' daily interactions. If you're passionate about creating high-performance web applications and thrive on turning ambitious design concepts into reality, we want to hear from you.Kustom offers a competitive benefits package designed to support both your financial security and overall wellbeing. This includes a comprehensive pension package with both national and occupational pension contributions, extensive health insurance, long-term illness protection, and flexible salary exchange options. Employees also receive an annual wellness allowance of 3,000 SEK to support activities that keep them healthy and energized. In addition, you get an extra day off when major holidays, such as Christmas Eve or New Year’s Eve, fall on a weekend.Practical detailsStart: as agreed upon.Extent: full time, 100%.Location: Stockholm.Salary: as agreed upon.Do you find the position as Frontend Engineer interesting? We at Needo are looking forward hearing from you!We are only able to process applications sent through our application form.

Do you thrive on tackling complex challenges? Are you passionate about creating impactful solutions that drive commerce forward? Do you believe in encouraging and elevating those around you? Then this position as Frontend Engineer might be something for you!About KustomKustom, formerly known as Klarna Checkout (KCO), is the Nordic market leader in digital checkout solutions. Today, they support over 24,000 merchants across more than 170 countries, providing a streamlined checkout experience. They offer localized solutions in 18 markets, tailored to specific languages, currencies, and payment methods. No matter where businesses operate, they deliver a checkout experience that meets the needs of both merchants and shoppers - driving growth globally.About the positionAs a Frontend Engineer at Kustom, you will be responsible for designing and implementing user interfaces using modern JavaScript frameworks. You will work closely with their designers, product managers and backend engineers to deliver seamless and engaging web applications that optimize user experience and drive conversion.In this role, you will develop and evolve Kustom’s checkout products, from the complete checkout experience to embeddable components that integrate into a wide range of online stores. You will also play an important role in developing Kustom’s UI library, Morpheus, and the shared design language that brings Kustom’s products together. The role comes with significant responsibility for the performance, reliability, and observability of business-critical code, while also promoting best practices in testing, accessibility, and security. You will contribute to the team’s technical direction through code reviews, mentoring, and close collaboration with other engineers.As a key member in the Checkout team, you'll be at the forefront of crafting exceptional digital experiences. We're not just looking for someone to write code - we're seeking a creative problem-solver who can transform ideas into intuitive, cutting-edge interfaces for Kustom’s users. Your expertise will help shape the future of their products, making complex flows feel effortless.Your main responsibilities:

• Frontend development of checkout products, from full user experience to embeddable components.
• Contribute to the UI library and shared design language.
• Own the performance, reliability, and observability of code for business critical applications.
• Work with testing, security and foster best practises in the team.
• Mentor other engineers, review code and contribute to the technical direction of the frontend.

About youTo be successful in this position we believe that you have a Bachelor’s degree in Computer Science, Engineering or similar. You have deep expertise in modern JavaScript and TypeScript frameworks and strong experience with React. You have a solid foundation with HTLM, CSS and responsive, accessible UI. You have experience integrating with backend APIs and data flows. You have previous experience building web applications that operates different markets, and are familiar with iframe and cross-origin integration patterns and how to safely run a piece of UI inside another product. Lastly, we believe that you have experience from fintech, e-commerce, SaaS or consulting environments to be a good fit.As a person, we believe that you have strong communication skills and thrive in a business oriented, dynamic environment. You enjoy working independently at times, but also enjoy collaborating with rest of the team. You are fluent in English and are able to work from Kustom’s Stockholm office.Important for the position:

• Bachelor’s degree in Computer Science, Engineering or similar.
• Deep expertise in modern JavaScript and TypeScript frameworks.
• Strong experience working with React.
• Solid foundation in HTLM, CSS and responsive, accessible UI.
• Experience integrating with backend APIs and dataflows.
• Previous experience building web applications that operates different markets.
• Familiar with iframe and cross-origin integration patterns.
• Experience from fintech, e-commerce, SaaS or consulting environments.

Kustom’s offerAt Kustom, you'll have the opportunity to make a real impact on their users' daily interactions. If you're passionate about creating high-performance web applications and thrive on turning ambitious design concepts into reality, we want to hear from you.Kustom offers a competitive benefits package designed to support both your financial security and overall wellbeing. This includes a comprehensive pension package with both national and occupational pension contributions, extensive health insurance, long-term illness protection, and flexible salary exchange options. Employees also receive an annual wellness allowance of 3,000 SEK to support activities that keep them healthy and energized. In addition, you get an extra day off when major holidays, such as Christmas Eve or New Year’s Eve, fall on a weekend.Practical detailsStart: as agreed upon.Extent: full time, 100%.Location: Stockholm.Salary: as agreed upon.Do you find the position as Frontend Engineer interesting? We at Needo are looking forward hearing from you!We are only able to process applications sent through our application form.

Do you thrive on tackling complex challenges? Are you passionate about creating impactful solutions that drive commerce forward? Do you believe in encouraging and elevating those around you? Then this position as Frontend Engineer might be something for you!About KustomKustom, formerly known as Klarna Checkout (KCO), is the Nordic market leader in digital checkout solutions. Today, they support over 24,000 merchants across more than 170 countries, providing a streamlined checkout experience. They offer localized solutions in 18 markets, tailored to specific languages, currencies, and payment methods. No matter where businesses operate, they deliver a checkout experience that meets the needs of both merchants and shoppers - driving growth globally.About the positionAs a Frontend Engineer at Kustom, you will be responsible for designing and implementing user interfaces using modern JavaScript frameworks. You will work closely with their designers, product managers and backend engineers to deliver seamless and engaging web applications that optimize user experience and drive conversion.In this role, you will develop and evolve Kustom’s checkout products, from the complete checkout experience to embeddable components that integrate into a wide range of online stores. You will also play an important role in developing Kustom’s UI library, Morpheus, and the shared design language that brings Kustom’s products together. The role comes with significant responsibility for the performance, reliability, and observability of business-critical code, while also promoting best practices in testing, accessibility, and security. You will contribute to the team’s technical direction through code reviews, mentoring, and close collaboration with other engineers.As a key member in the Checkout team, you'll be at the forefront of crafting exceptional digital experiences. We're not just looking for someone to write code - we're seeking a creative problem-solver who can transform ideas into intuitive, cutting-edge interfaces for Kustom’s users. Your expertise will help shape the future of their products, making complex flows feel effortless.Your main responsibilities:

• Frontend development of checkout products, from full user experience to embeddable components.
• Contribute to the UI library and shared design language.
• Own the performance, reliability, and observability of code for business critical applications.
• Work with testing, security and foster best practises in the team.
• Mentor other engineers, review code and contribute to the technical direction of the frontend.

About youTo be successful in this position we believe that you have a Bachelor’s degree in Computer Science, Engineering or similar. You have deep expertise in modern JavaScript and TypeScript frameworks and strong experience with React. You have a solid foundation with HTLM, CSS and responsive, accessible UI. You have experience integrating with backend APIs and data flows. You have previous experience building web applications that operates different markets, and are familiar with iframe and cross-origin integration patterns and how to safely run a piece of UI inside another product. Lastly, we believe that you have experience from fintech, e-commerce, SaaS or consulting environments to be a good fit.As a person, we believe that you have strong communication skills and thrive in a business oriented, dynamic environment. You enjoy working independently at times, but also enjoy collaborating with rest of the team. You are fluent in English and are able to work from Kustom’s Stockholm office.Important for the position:

• Bachelor’s degree in Computer Science, Engineering or similar.
• Deep expertise in modern JavaScript and TypeScript frameworks.
• Strong experience working with React.
• Solid foundation in HTLM, CSS and responsive, accessible UI.
• Experience integrating with backend APIs and dataflows.
• Previous experience building web applications that operates different markets.
• Familiar with iframe and cross-origin integration patterns.
• Experience from fintech, e-commerce, SaaS or consulting environments.

Kustom’s offerAt Kustom, you'll have the opportunity to make a real impact on their users' daily interactions. If you're passionate about creating high-performance web applications and thrive on turning ambitious design concepts into reality, we want to hear from you.Kustom offers a competitive benefits package designed to support both your financial security and overall wellbeing. This includes a comprehensive pension package with both national and occupational pension contributions, extensive health insurance, long-term illness protection, and flexible salary exchange options. Employees also receive an annual wellness allowance of 3,000 SEK to support activities that keep them healthy and energized. In addition, you get an extra day off when major holidays, such as Christmas Eve or New Year’s Eve, fall on a weekend.Practical detailsStart: as agreed upon.Extent: full time, 100%.Location: Stockholm.Salary: as agreed upon.Do you find the position as Frontend Engineer interesting? We at Needo are looking forward hearing from you!We are only able to process applications sent through our application form.

Do you thrive on tackling complex challenges? Are you passionate about creating impactful solutions that drive commerce forward? Do you believe in encouraging and elevating those around you? Then this position as Frontend Engineer might be something for you!About KustomKustom, formerly known as Klarna Checkout (KCO), is the Nordic market leader in digital checkout solutions. Today, they support over 24,000 merchants across more than 170 countries, providing a streamlined checkout experience. They offer localized solutions in 18 markets, tailored to specific languages, currencies, and payment methods. No matter where businesses operate, they deliver a checkout experience that meets the needs of both merchants and shoppers - driving growth globally.About the positionAs a Frontend Engineer at Kustom, you will be responsible for designing and implementing user interfaces using modern JavaScript frameworks. You will work closely with their designers, product managers and backend engineers to deliver seamless and engaging web applications that optimize user experience and drive conversion.In this role, you will develop and evolve Kustom’s checkout products, from the complete checkout experience to embeddable components that integrate into a wide range of online stores. You will also play an important role in developing Kustom’s UI library, Morpheus, and the shared design language that brings Kustom’s products together. The role comes with significant responsibility for the performance, reliability, and observability of business-critical code, while also promoting best practices in testing, accessibility, and security. You will contribute to the team’s technical direction through code reviews, mentoring, and close collaboration with other engineers.As a key member in the Checkout team, you'll be at the forefront of crafting exceptional digital experiences. We're not just looking for someone to write code - we're seeking a creative problem-solver who can transform ideas into intuitive, cutting-edge interfaces for Kustom’s users. Your expertise will help shape the future of their products, making complex flows feel effortless.Your main responsibilities:

• Frontend development of checkout products, from full user experience to embeddable components.
• Contribute to the UI library and shared design language.
• Own the performance, reliability, and observability of code for business critical applications.
• Work with testing, security and foster best practises in the team.
• Mentor other engineers, review code and contribute to the technical direction of the frontend.

About youTo be successful in this position we believe that you have a Bachelor’s degree in Computer Science, Engineering or similar. You have deep expertise in modern JavaScript and TypeScript frameworks and strong experience with React. You have a solid foundation with HTLM, CSS and responsive, accessible UI. You have experience integrating with backend APIs and data flows. You have previous experience building web applications that operates different markets, and are familiar with iframe and cross-origin integration patterns and how to safely run a piece of UI inside another product. Lastly, we believe that you have experience from fintech, e-commerce, SaaS or consulting environments to be a good fit.As a person, we believe that you have strong communication skills and thrive in a business oriented, dynamic environment. You enjoy working independently at times, but also enjoy collaborating with rest of the team. You are fluent in English and are able to work from Kustom’s Stockholm office.Important for the position:

• Bachelor’s degree in Computer Science, Engineering or similar.
• Deep expertise in modern JavaScript and TypeScript frameworks.
• Strong experience working with React.
• Solid foundation in HTLM, CSS and responsive, accessible UI.
• Experience integrating with backend APIs and dataflows.
• Previous experience building web applications that operates different markets.
• Familiar with iframe and cross-origin integration patterns.
• Experience from fintech, e-commerce, SaaS or consulting environments.

Kustom’s offerAt Kustom, you'll have the opportunity to make a real impact on their users' daily interactions. If you're passionate about creating high-performance web applications and thrive on turning ambitious design concepts into reality, we want to hear from you.Kustom offers a competitive benefits package designed to support both your financial security and overall wellbeing. This includes a comprehensive pension package with both national and occupational pension contributions, extensive health insurance, long-term illness protection, and flexible salary exchange options. Employees also receive an annual wellness allowance of 3,000 SEK to support activities that keep them healthy and energized. In addition, you get an extra day off when major holidays, such as Christmas Eve or New Year’s Eve, fall on a weekend.Practical detailsStart: as agreed upon.Extent: full time, 100%.Location: Stockholm.Salary: as agreed upon.Do you find the position as Frontend Engineer interesting? We at Needo are looking forward hearing from you!We are only able to process applications sent through our application form.

Do you thrive on tackling complex challenges? Are you passionate about creating impactful solutions that drive commerce forward? Do you believe in encouraging and elevating those around you? Then this position as Frontend Engineer might be something for you!About KustomKustom, formerly known as Klarna Checkout (KCO), is the Nordic market leader in digital checkout solutions. Today, they support over 24,000 merchants across more than 170 countries, providing a streamlined checkout experience. They offer localized solutions in 18 markets, tailored to specific languages, currencies, and payment methods. No matter where businesses operate, they deliver a checkout experience that meets the needs of both merchants and shoppers - driving growth globally.About the positionAs a Frontend Engineer at Kustom, you will be responsible for designing and implementing user interfaces using modern JavaScript frameworks. You will work closely with their designers, product managers and backend engineers to deliver seamless and engaging web applications that optimize user experience and drive conversion.In this role, you will develop and evolve Kustom’s checkout products, from the complete checkout experience to embeddable components that integrate into a wide range of online stores. You will also play an important role in developing Kustom’s UI library, Morpheus, and the shared design language that brings Kustom’s products together. The role comes with significant responsibility for the performance, reliability, and observability of business-critical code, while also promoting best practices in testing, accessibility, and security. You will contribute to the team’s technical direction through code reviews, mentoring, and close collaboration with other engineers.As a key member in the Checkout team, you'll be at the forefront of crafting exceptional digital experiences. We're not just looking for someone to write code - we're seeking a creative problem-solver who can transform ideas into intuitive, cutting-edge interfaces for Kustom’s users. Your expertise will help shape the future of their products, making complex flows feel effortless.Your main responsibilities:

• Frontend development of checkout products, from full user experience to embeddable components.
• Contribute to the UI library and shared design language.
• Own the performance, reliability, and observability of code for business critical applications.
• Work with testing, security and foster best practises in the team.
• Mentor other engineers, review code and contribute to the technical direction of the frontend.

About youTo be successful in this position we believe that you have a Bachelor’s degree in Computer Science, Engineering or similar. You have deep expertise in modern JavaScript and TypeScript frameworks and strong experience with React. You have a solid foundation with HTLM, CSS and responsive, accessible UI. You have experience integrating with backend APIs and data flows. You have previous experience building web applications that operates different markets, and are familiar with iframe and cross-origin integration patterns and how to safely run a piece of UI inside another product. Lastly, we believe that you have experience from fintech, e-commerce, SaaS or consulting environments to be a good fit.As a person, we believe that you have strong communication skills and thrive in a business oriented, dynamic environment. You enjoy working independently at times, but also enjoy collaborating with rest of the team. You are fluent in English and are able to work from Kustom’s Stockholm office.Important for the position:

• Bachelor’s degree in Computer Science, Engineering or similar.
• Deep expertise in modern JavaScript and TypeScript frameworks.
• Strong experience working with React.
• Solid foundation in HTLM, CSS and responsive, accessible UI.
• Experience integrating with backend APIs and dataflows.
• Previous experience building web applications that operates different markets.
• Familiar with iframe and cross-origin integration patterns.
• Experience from fintech, e-commerce, SaaS or consulting environments.

Kustom’s offerAt Kustom, you'll have the opportunity to make a real impact on their users' daily interactions. If you're passionate about creating high-performance web applications and thrive on turning ambitious design concepts into reality, we want to hear from you.Kustom offers a competitive benefits package designed to support both your financial security and overall wellbeing. This includes a comprehensive pension package with both national and occupational pension contributions, extensive health insurance, long-term illness protection, and flexible salary exchange options. Employees also receive an annual wellness allowance of 3,000 SEK to support activities that keep them healthy and energized. In addition, you get an extra day off when major holidays, such as Christmas Eve or New Year’s Eve, fall on a weekend.Practical detailsStart: as agreed upon.Extent: full time, 100%.Location: Stockholm.Salary: as agreed upon.Do you find the position as Frontend Engineer interesting? We at Needo are looking forward hearing from you!We are only able to process applications sent through our application form.

Do you thrive on tackling complex challenges? Are you passionate about creating impactful solutions that drive commerce forward? Do you believe in encouraging and elevating those around you? Then this position as Frontend Engineer might be something for you!About KustomKustom, formerly known as Klarna Checkout (KCO), is the Nordic market leader in digital checkout solutions. Today, they support over 24,000 merchants across more than 170 countries, providing a streamlined checkout experience. They offer localized solutions in 18 markets, tailored to specific languages, currencies, and payment methods. No matter where businesses operate, they deliver a checkout experience that meets the needs of both merchants and shoppers - driving growth globally.About the positionAs a Frontend Engineer at Kustom, you will be responsible for designing and implementing user interfaces using modern JavaScript frameworks. You will work closely with their designers, product managers and backend engineers to deliver seamless and engaging web applications that optimize user experience and drive conversion.In this role, you will develop and evolve Kustom’s checkout products, from the complete checkout experience to embeddable components that integrate into a wide range of online stores. You will also play an important role in developing Kustom’s UI library, Morpheus, and the shared design language that brings Kustom’s products together. The role comes with significant responsibility for the performance, reliability, and observability of business-critical code, while also promoting best practices in testing, accessibility, and security. You will contribute to the team’s technical direction through code reviews, mentoring, and close collaboration with other engineers.As a key member in the Checkout team, you'll be at the forefront of crafting exceptional digital experiences. We're not just looking for someone to write code - we're seeking a creative problem-solver who can transform ideas into intuitive, cutting-edge interfaces for Kustom’s users. Your expertise will help shape the future of their products, making complex flows feel effortless.Your main responsibilities:

• Frontend development of checkout products, from full user experience to embeddable components.
• Contribute to the UI library and shared design language.
• Own the performance, reliability, and observability of code for business critical applications.
• Work with testing, security and foster best practises in the team.
• Mentor other engineers, review code and contribute to the technical direction of the frontend.

About youTo be successful in this position we believe that you have a Bachelor’s degree in Computer Science, Engineering or similar. You have deep expertise in modern JavaScript and TypeScript frameworks and strong experience with React. You have a solid foundation with HTLM, CSS and responsive, accessible UI. You have experience integrating with backend APIs and data flows. You have previous experience building web applications that operates different markets, and are familiar with iframe and cross-origin integration patterns and how to safely run a piece of UI inside another product. Lastly, we believe that you have experience from fintech, e-commerce, SaaS or consulting environments to be a good fit.As a person, we believe that you have strong communication skills and thrive in a business oriented, dynamic environment. You enjoy working independently at times, but also enjoy collaborating with rest of the team. You are fluent in English and are able to work from Kustom’s Stockholm office.Important for the position:

• Bachelor’s degree in Computer Science, Engineering or similar.
• Deep expertise in modern JavaScript and TypeScript frameworks.
• Strong experience working with React.
• Solid foundation in HTLM, CSS and responsive, accessible UI.
• Experience integrating with backend APIs and dataflows.
• Previous experience building web applications that operates different markets.
• Familiar with iframe and cross-origin integration patterns.
• Experience from fintech, e-commerce, SaaS or consulting environments.

Kustom’s offerAt Kustom, you'll have the opportunity to make a real impact on their users' daily interactions. If you're passionate about creating high-performance web applications and thrive on turning ambitious design concepts into reality, we want to hear from you.Kustom offers a competitive benefits package designed to support both your financial security and overall wellbeing. This includes a comprehensive pension package with both national and occupational pension contributions, extensive health insurance, long-term illness protection, and flexible salary exchange options. Employees also receive an annual wellness allowance of 3,000 SEK to support activities that keep them healthy and energized. In addition, you get an extra day off when major holidays, such as Christmas Eve or New Year’s Eve, fall on a weekend.Practical detailsStart: as agreed upon.Extent: full time, 100%.Location: Stockholm.Salary: as agreed upon.Do you find the position as Frontend Engineer interesting? We at Needo are looking forward hearing from you!We are only able to process applications sent through our application form.

Vi tycker att det ska vara roligt att gå till arbetet. Att ha en arbetsplats som bygger på gemensamma värderingar, där kollektivet och kompetensen står i centrum. Våra Kumpaner är vår viktigaste tillgång, och det är genom dem som många av våra beslut formas. Här är alla med och påverkar riktningen framåt.

Visst är det kul att arbeta – särskilt när man får bygga moderna, snygga och användarvänliga gränssnitt. Men ibland kommer livet emellan.

Vi är en flexibel arbetsplats och litar på att våra Kumpaner tar kloka beslut som fungerar för både individen och företaget. Hos oss får du sex veckors semester, flexibilitet i vardagen och möjlighet att ibland bryta rutinen med konferenser eller gemensamma aktiviteter.

Bra folk ska ha bra lön.

Utöver en konkurrenskraftig lön erbjuder vi en generös pensionsavsättning och något vi tycker är extra viktigt: här delar vi på vinsten. När det går bra för oss ska det märkas för alla.

Vi maxar även friskvårdsbidraget och erbjuder en riktigt bra sjukvårdsförsäkring.

Vår samlingsplats är kontoret vid Mosebacke. Här träffas vi några dagar i veckan, samarbetar och bygger lösningar tillsammans.

Luncher, spontana diskussioner om teknik och ibland en kaffe – eller en öl – framåt eftermiddagen hör till vardagen.

Du är en nyfiken frontendutvecklare som brinner för att skapa moderna, snabba och användarvänliga webbapplikationer. Du gillar att arbeta nära både design och produkt och trivs i en miljö där beslutsvägarna är korta och tempot högt.

Hos oss får du en central roll i ett växande team där du:

• Arbetar med moderna tekniker såsom TypeScript, React och node.je, Next.Js
• Är med och påverkar tekniska beslut, arkitektur och kodstandarder
• Samarbetar nära produkt, design och affärsutveckling

Vi söker dig som trivs i moderna utvecklingsmiljöer och vill vara med och bygga framtidens lösningar. För att lyckas i rollen ser vi att du har:

• Minst sju års erfarenhet som fullstackutvecklare med kunskaper i Node.js, eller Next.js i back end, TypeScript, React.js
• Erfarenhet av att arbeta i agila team
• Förmåga att trivas i en snabbrörlig miljö med korta beslutsvägar
• Stort intresse för AI
• Flytande svenska och engelska, i tal och skrift

• Erfarenhet av att arbeta med AI-funktionalitet, exempelvis integration av AI-tjänster, LLM:er eller AI-drivna funktioner i frontend
• Förståelse för hur man bygger datadrivna eller intelligenta gränssnitt

Vi är en webb- och konsultbyrå som funnits sedan 2004. Vi utvecklar webb och appar i moderna tekniska miljöer och arbetar med kunder inom många olika branscher.

Vårt kontor ligger uppe på Mosebacke, precis bredvid Södra Teatern.

Har du frågor är du alltid välkommen att kontakta oss på nea@kumpan.se.

Vår kund arbetar är en snabbväxande aktör inom bilhandel där handlare köper och säljer fordon mellan varandra via deras plattform. Utöver marknadsplatsen erbjuder vi även:

• Logistik och internationell transport
• Finansiering
• Tester och garantier

Bolaget grundades 2018 och finns idag i flera europeiska marknader, med huvudkontor i Stockholm. De drivs av ett entreprenöriellt team och har stark finansiell backing med fokus på skalbara och lönsamma bolag.

Vi på kumpan har samarbetat med denna kund en längre tid och nu vill de rekrytera och vi på Kumpan hjälper de med det.

Som Senior Fullstack Developer blir man en nyckelperson i bolagets techteam och arbetar brett med både frontend och backend. Rollen innebär stor möjlighet att påverka teknikval, arbetssätt och plattformens framtida utveckling.

Ansvarsområden inkluderar:

• Utveckling och vidareutveckling av plattformen
• Deltagande i och drivande av code reviews
• Bidrag till och utveckling av tech stack
• Integration av nya system i samband med förvärv
• Utforskning och implementering av AI-lösningar
• Nära samarbete med produkt och affär

Under de första månaderna förväntas kandidaten snabbt sätta sig in i plattformen, bidra till kodbasen och vara med och strukturera tekniska arbetssätt.

• Minst 6 års arbetserfarenhet av TypeScript, Node.js och React
• Erfarenhet av databaser (t.ex. PostgreSQL)
• Stark förståelse för kodkvalitet och vana av code reviews
• Flytande svenska och engelska, i tal och skrift

Meriterande:

• Erfarenhet av AI-verktyg
• DevOps
• Plattformar eller marketplaces
• Fintech eller transaktionsintensiva system

Vår kund söker en självständig och ansvarstagande utvecklare som brinner för teknik och problemlösning. Du är nyfiken, tekniskt driven och trivs i en snabbrörlig miljö där du får testa ny teknik och bidra till utvecklingen av plattformen.

De erbjuder dig möjligheten att påverka i det dagliga arbetet. Du arbetar nära både affär och ledning och får vara med och bygga något som kommer att ha stor påverkan inom området. Du blir en del av ett entreprenöriellt team med snabba beslut och hög grad av autonomi, där ditt engagemang och din kompetens verkligen gör skillnad.