Senior front end developer

Role

Senior Front-end Developer (Contract / Freelance) — fully remote, ongoing.

Opportunity

Join a small, product-driven team shipping across multiple Next.js applications for expats’ tax workflows (onboarding, document extraction, payments). You’ll help ensure the software is reliable and high quality because users entrust you with sensitive financial data.

Responsibilities

• Build features across multiple Next.js applications
• Implement UI from Figma with high-fidelity/pixel-perfect accuracy
• Write and consume GraphQL queries/mutations using codegen
• Create and maintain tests:
  • Component tests with Jest/Bun + Testing Library
  • API mocking with MSW
• Maintain Storybook and keep component documentation up to date
• Do code reviews for the junior developer’s PRs and pair when needed
• Collaborate with the front-end lead on architecture decisions
• Use feature flags to support safe rollouts

How you work

• 2-week sprints with daily standups
• Central European Time (CET) working hours
• Office space in Amsterdam; remote is an option

Required skills

• TypeScript (advanced: generics, discriminated unions, utility types, strict mode)
• React 18/19 (rendering model, hooks, Suspense, transitions, concurrent features)
• Next.js (App Router): React Server Components, server actions, streaming, layouts, route groups, middleware
• Next.js (Pages Router): getStaticProps/getServerSideProps and judgment on when to migrate to RSC
• Styling: SCSS/CSS Modules (scalable/maintainable CSS, specificity, responsive design, CSS variables)
• GraphQL: schema comprehension, codegen workflows, client cache management (Apollo and/or URQL), optimistic updates, pagination, error handling, fragment composition
• Figma-to-code implementation with design tokens and typography/spacing scales
• Storybook component story maintenance
• Accessibility: practical WCAG 2.1 AA (ARIA, focus management, keyboard navigation, screen reader compatibility)
• Testing: Jest or Bun + React Testing Library; MSW for API mocking

Contract details

• 32 hours/week (4 days)
• Compensation: $70,000–$90,000 per year
• Fully remote