Senior Front-End Blockchain Developer

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.