Senior Fullstack Headless Developer (React/Next.js)

TL;DR

Senior Fullstack Headless Developer (React/Next.js): Design responsive front-ends and integrate with backend services via APIs in a headless architecture with an accent on scalability, security, and composability. Focus on building high-performance platforms, defining API contracts, and ensuring usability and accessibility standards.

Location: Hybrid in Groningen, Netherlands

Company

Digital agency partnering with leading technology providers to accelerate business growth through personalized customer experiences at scale.

What you will do

• Design scalable, responsive front-ends using React, Next.js, and TypeScript.
• Develop backend integrations with Node.js using REST, GraphQL, Webhooks, and API gateways.
• Collaborate with designers, backend engineers, and clients to translate UI/UX into technical implementations and refine architectures.
• Own end-to-end project delivery, technical architecture, and code quality.
• Lead and mentor developers through guidance and code reviews.
• Ensure products meet accessibility standards and best practices.

Requirements

• 5+ years building modern React apps with hooks, composition, state management, and backend integrations (caching, databases, GraphQL, APIs).
• Strong proficiency in Node.js, React, Next.js, TypeScript, HTML, CSS, JavaScript.
• Experience with headless/composable architectures, API-first design, and data integrations focusing on security and performance.
• Design sensibility for accurate UI implementation and visual consistency.
• Ability to work directly with clients, provide technical direction, and maintain high code standards.
• Solid understanding of web accessibility (ARIA, keyboard support).

Culture & Benefits

• Agile way of working with flexible hours and hybrid setup.
• Professional development via hirify.global Academy, study budget, study days, and expeditions.
• Perks including pension scheme, travel reimbursement, company equipment, office food/drinks, gym membership, bike plan, parental leave, and loyalty days.
• Supportive international team environment with opportunities for career growth.
• Working from abroad and Insights Discovery for personal development.