Blockchain Developer

Job Role- Blockchain Developer Location - London, UK Experience Level- 5+ Years

• What you'll do
• Backend engineering — Design and ship enterprise-grade Java/Kotlin microservices and APIs that meet bank-grade availability, latency and security standards.
• Blockchain development — Implement on-chain business logic and workflows: smart contract interactions, mint/burn, asset transfers, wallet lifecycle and key management flows.
• Integration — Connect the platform to custody providers, wallet infrastructure, node providers and SaaS blockchain platforms; integrate with core banking, payments and ledger systems.
• Security & resilience — Apply secure coding practices, participate in architecture and threat reviews, and support audit, compliance and production readiness.
• Collaboration — Work in a cross-functional agile squad with architects, DevOps, security, product owners and blockchain operations; mentor engineers and share knowledge. What you bring Experience
• 5+ years in software engineering, solution design or architecture, including production ownership
• Hands-on experience with blockchain protocols
• Background in financial services, payments or fintech — or a demonstrable grasp of how regulated money movement works
• Strong stakeholder management across business and technology
• Bachelor's in Computer Science, Software Engineering or equivalent
• Fluent English (C1+) Technical
• Strong: Java (preferred), Kotlin, Spring Boot, REST APIs, microservices
• Solid: event-driven architecture, Kafka, RabbitMQ, SQL and NoSQL, Docker, Kubernetes, CI/CD, Git workflows
• Good understanding of distributed systems, API design, system integration and scalability patterns Platform Integration
• Build integrations with digital asset custody and wallet providers.
• Develop connectivity with blockchain infrastructure and third-party services.
• Collaborate on SaaS blockchain platform implementation initiatives. Security & Reliability
• Follow secure coding and software engineering best practices.
• Participate in architecture reviews and technical design discussions.
• Contribute to operational readiness and production support activities.
• Support compliance, audit, and security requirements. Collaboration
• Work within cross-functional agile teams.
• Partner with Architects, DevOps Engineers, Security Specialists, Product Owners, and Blockchain Operations professionals.
• Support technical mentoring and knowledge sharing across engineering teams.