Senior Front-end Developer (Contract)

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Front-end Developer (Contract) based in Netherlands.

As a Senior Front-end Developer, you will lead the development of high-quality, responsive, and performant web experiences within a collaborative, client-focused environment. You will translate technical and business requirements into intuitive digital solutions across desktop and mobile. The role combines hands-on development with technical leadership, mentoring, and stakeholder collaboration. You will work extensively with TypeScript, HTML, CSS, and React while helping drive modern development standards and best practices. Your expertise will contribute to scalable architectures, polished user experiences, and reliable application performance. This is an opportunity to influence both technical direction and the quality of digital products delivered to clients.

Accountabilities

• Lead the design and implementation of high-quality front-end solutions aligned with technical and business requirements.
• Collaborate closely with clients, team members, stakeholders, and leadership to deliver effective digital experiences.
• Develop tested, documented, clean, and efficient TypeScript, HTML, and CSS code.
• Build responsive, cross-browser-compatible applications optimized for both desktop and mobile environments.
• Develop interactive prototypes to explore and validate innovative UI solutions.
• Drive the adoption of modern development standards, tools, frameworks, and engineering practices.
• Apply UX, branding, responsive design, and SEO principles throughout the development lifecycle.
• Conduct browser testing, debugging, and performance optimization to ensure reliable and performant applications.
• Produce detailed technical documentation and test plans while maintaining high-quality codebases.
• Mentor junior and mid-level developers, encouraging best practices, knowledge sharing, and professional growth.
• Build trusted relationships with clients, colleagues, and stakeholders while serving as a reliable technical advisor.
• Manage multiple projects and priorities effectively while consistently meeting agreed deadlines and commitments.
• Provide code samples as part of the application process, with one repository that best represents your relevant work.

Requirements:

• 5+ years of professional experience in front-end development, with proven experience delivering production web applications.
• Deep proficiency in HTML, CSS, and TypeScript.
• Extensive hands-on experience with React, including complex state management and front-end architecture.
• Strong knowledge of Git workflows, branching strategies, and collaborative development practices.
• Demonstrated ability in browser testing, debugging, troubleshooting, and performance optimization.
• Solid understanding of the complete web development lifecycle, from design and development through deployment.
• Advanced knowledge of UI/UX principles, design patterns, responsive design, and web accessibility considerations.
• Solid understanding of SEO best practices for modern web applications.
• Strong leadership, mentoring, analytical, multitasking, and problem-solving skills.
• Excellent communication and stakeholder management abilities, with the confidence to work effectively with both technical and non-technical audiences.
• Ability to work across multiple projects in a fast-paced environment while remaining organized, dependable, and deadline-oriented.
• Intermediate to fluent spoken English and fluent written English.
• Professional experience with Next.js is considered an advantage.
• Experience with additional front-end frameworks and content management systems (CMS) is a plus.
• A Bachelor’s degree or equivalent professional experience in Computer Science, Information Systems, Business Administration, or a related field is desirable.

Benefits:

• Competitive contract compensation.
• Opportunities to collaborate with cross-cultural teams and work in a diverse, collaborative environment.
• Opportunities for professional growth, mentorship, and continuous learning.
• Support for developing technical skills and staying current with modern technologies and development practices.
• A people-focused environment where employees are encouraged to contribute meaningfully and develop their expertise.
• For eligible US-based employees, the broader benefits package includes health, dental, vision, life, and disability insurance, as well as a 401(k) plan with up to a 4% company match.
• US-based employees also benefit from self-managed personal time off and ongoing learning and professional development opportunities.