HCL Technologies B.V. Netherland
Blockchain Developer
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Job Role - Blockchain Developer
Location - London, UK
Experience Level - 5+ Years
Job Description
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.
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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
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- 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.
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