FrontEnd Developer

Summary: Our international client is seeking a Frontend Developer for a freelance B2B contract lasting 6 months, with a strong possibility of extension. The role requires 3 days on-site in Belfast and 2 days remote, contributing to a project expected to last over 2 years. Candidates must be proficient in English and have relevant experience in web application development. The position is classified as inside IR35.

Key Responsibilities:

• Develop web applications using React and Relay (or similar technologies).
• Optimize GraphQL API development and queries.
• Interface with data-backed applications using C# and SQL.
• Implement front-end state-management libraries and best practices.
• Apply user-focused design principles in development.
• Contribute to financial applications as needed.

Key Skills:

• Proven experience in web application development with React and Relay.
• Strong knowledge of GraphQL API development.
• Experience with C# and SQL.
• Understanding of front-end state-management libraries.
• Strong user-focused design principles.
• Experience in financial applications is a plus.

Salary (Rate): undetermined

City: Belfast

Country: United Kingdom

Working Arrangements: hybrid

IR35 Status: inside IR35

Seniority Level: undetermined

Industry: IT

Detailed Description From Employer:

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Our international client is looking for a Frontend Developer to join their team for a freelance B2B contract that is 6 months with a high chance of extension. This position is 3 days a week on-site in Belfast and 2 days remote for the duration of the project. The project is forecast for 2+ years.

Project details

• Position: Frontend Developer
• Contract type: Freelance B2B.
• Contract Length: 6 Months+ Ext
• Location: 3 days per week in Belfast
• Languages: English speaking is a must
• INSIDE IR35

Required Experience:

• Proven experience in building web applications using React and Relay (or similar technologies).
• Strong knowledge of GraphQL API development and query optimization.
• Experience with C# and SQL, particularly for interfacing with data-backed applications.
• Understanding of front-end state-management libraries and best practices.
• Strong user-focused design principles.
• Experience in financial applications is a plus.

If this is something you are interested in, please send me an up-to-date CV, and we can discuss the role in more detail. Otherwise, what is it you're looking for? If you know someone who might be interested, please forward this email their way

Reference
CR/128223_1753701234

Date
28 Jul 2025

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