Stockholm Frontend Engineer — Checkout UI & React

Kustom; Stockholms kommun; On-site; SEK 750,000 - 900,000; Full time

Benefits offered by this job

Pension plan (national + occupational)

Comprehensive health insurance

Long-term illness protection

Flexible salary exchange options

Annual wellness allowance 3000 SEK

Extra day off for major holidays

Job summary

Kustom, Stockholm-based, invites a Frontend Engineer to shape checkout experiences and contribute to the Morpheus UI library. You’ll own performance, reliability, and observability of frontend code, while mentoring peers and guiding frontend direction.

The role requires strong React skills, a solid UI foundation, and collaboration across teams in fintech/e-commerce domains. Start date is flexible, with full-time 100% capacity in Stockholm.

Qualifications

• Bachelor’s degree in Computer Science, Engineering or similar.
• 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.

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.

Skills

React

HTML

CSS

Accessibility

Testing

Security

Code reviews

Mentoring

Education

Bachelor’s degree in Computer Science, Engineering or similar

Job description

Kustom, Stockholm-based, invites a Frontend Engineer to shape checkout experiences and contribute to the Morpheus UI library. You’ll own performance, reliability, and observability of frontend code, while mentoring peers and guiding frontend direction.

The role requires strong React skills, a solid UI foundation, and collaboration across teams in fintech/e-commerce domains. Start date is flexible, with full-time 100% capacity in Stockholm.