Senior Front-end Developer (React / Next.js)

YTEC; Netherlands; On-site; EUR 33,000 - 56,000; Full time

Benefits offered by this job

Training budget

25 vacation days

Pension plan

Company laptop

Company phone

Flexible working hours

Hybrid working

Team outings

Job summary

YTEC is seeking a senior front-end engineer to design and build modern React/Next.js applications, ensuring long-term maintainability as the codebase grows. You will own end-to-end quality, from development to production, working with DevOps and back-end teams to ensure clean API integration and reliable deployments.

The role emphasizes architecture, performance, and UX improvements, with a strong culture of ownership, rigorous code review, and continuous learning.

Qualifications

• 5+ years in front-end development with React and TypeScript.
• Production experience with Next.js, including SSR/CSR/ISR.
• Strong front-end architecture knowledge and performance optimization.

Responsibilities

• Design and build modern React/Next.js applications.
• Make and defend architectural decisions and understand performance.
• Set front-end standards and build reusable components.
• Collaborate with back-end to integrate APIs.
• Own quality end-to-end, including production monitoring.
• Improve performance, accessibility, and UX.
• Review code and raise the bar across teams.

Skills

React

TypeScript

Next.js

Frontend architecture

Performance optimization

API integration

CI/CD

English fluency

5+ years frontend

Job description

Your mission

• Design and build modern React / Next.js applications that stay maintainable as they grow.


• Make and defend architectural decisions — and understand the performance consequences of them.


• Set front-end standards, build reusable components, and create patterns the whole team builds on.


• Work closely with our back-end developers to integrate APIs and business logic cleanly.


• Own quality end to end, including in production: reading logs, tracing issues, and diagnosing incidents together with our DevOps and sysadmins rather than handing them off.


• Improve performance, accessibility, and overall UX across projects.


• Review code, raise the bar, and help good front-enders across our teams become even better — without slowing them down.

Your profile

• 5+ years in front-end development, with deep, current React and TypeScript experience.


• Real production experience with Next.js — you understand rendering strategies (SSR / SSG / ISR / CSR), hydration, routing, and when to use which, not just how to scaffold an app.


• A strong grasp of front-end architecture: component design, state management, and how structural choices affect maintainability, bundle size, and runtime performance.


• The ability to measure and improve performance (Core Web Vitals, bundle analysis, profiling) — and to understand the cost of the trade-offs you make.


• Solid experience integrating front-ends with APIs and back-end systems.


• Comfort across the full lifecycle: version control, testing, debugging, CI/CD, deployment, and maintenance.


• Excellent English and the confidence to work directly with product owners and clients.


• Senior judgment: you know when to be rigorous and when to be pragmatic, you take ownership of outcomes, and you make the people around you better.

Nice to have: Python/Django and SQL (you'll work closely with our back-end teams), real depth in accessibility, a good design sensibility, or experience setting standards within a team.

Why us?

• Challenging custom software projects.


• A highly skilled and technical team.


• Short communication lines and little bureaucracy.


• Significant influence on front-end architecture and development standards.


• Opportunities to improve processes and shape the future of front-end development within the company.


• A culture that values expertise, ownership, and continuous improvement.


• A salary between €3000 - €5000,- based on experience.


• A training budget for courses, certifications, and industry events.


• 25 vacation days to ensure sufficient rest and relaxation.


• An attractive (optional) pension plan in which we double your contribution.


• A company laptop and phone.


• Flexible working hours that you can arrange yourself.


• Hybrid working is fully supported.


• Fun outings with your team and the chance to challenge your colleagues to a game of table tennis, chess, or pool.