We are seeking two Senior Front-End Blockchain Developers to join a UK-based B2B trading platform in the fintech space. You will continue the development of a Ruby/Rails and React web application, ensuring a seamless user experience and robust integrations with blockchain-based core services. This is a full-time, 12-month contract role with a preference for hybrid work in the UK.
Job Details Job Title: Senior Front-End Blockchain Developer
Number of Positions: 2
Location: London, UK
Job Type: Contract
Contract Start Date: 21 July 2025
Contract End Date: 21 July 2026
Contract Length: 12 months
Work Schedule: Monday to Friday, 09:00-17:00
Work Arrangement: Hybrid (flexible office days: Monday to Friday)
Candidate Remuneration: £6,500-£7,500 per month (£78,000-£90,000 per year)
Remuneration Frequency: Monthly
Country of Resource: United Kingdom
Responsibilities
Develop and maintain the front-end of a Ruby/Rails and React-based web application.
Collaborate with product and back-end teams to implement fintech and blockchain features.
Ensure high-quality, responsive, and secure UI/UX for the platform.
Required Skills and Experience Ruby/Rails: Minimum 7 years of hands-on experience
React: Minimum 7 years of hands-on experience
API Integrations: Minimum 5 years of experience
Professional Software Development: 10+ years of experience
Front-End Architecture: Strong understanding required
Language: English (Advanced proficiency)
Nice-to-Have Skills Experience with fintech platforms or blockchain-based UIs
Proficiency in JavaScript/TypeScript frameworks (e.g., Angular, Vue.js)
Exposure to Rust or Solana
Previous work on API-driven front-ends or complex UI/UX projects
Additional Requirements Eligibility: Candidates must have the right to live and work in the UK.
Work Arrangement: Preference for hybrid work in the UK, with flexibility for remote work.
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