Java Developer (Blockchain)

Dabster Systems Ireland Limited; City Of London; Hybrid; GBP 111,000 - 166,000; Part time

Job summary

Dabster Systems Ireland Limited in London is seeking a Java Developer (Blockchain) on a contract basis. You will design and implement backend services, APIs, and blockchain-related workflows within cross-functional teams. The role emphasizes secure, scalable systems aligned with banking standards.

Hybrid London work arrangement. Experience with Java, blockchain interactions, smart contracts, asset transfers, wallet management, and integrations with custodians and third-party services is valued.

Responsibilities

• Design and develop enterprise-grade backend services using Java.
• Build APIs and microservices supporting digital asset products.
• Develop scalable and resilient systems aligned with banking standards.
• Ensure high availability, security, performance, and maintainability.
• Implement blockchain-related business logic and workflows.
• Develop components supporting smart contract interactions, minting/burning, asset transfers, and wallet management.
• Integrate external blockchain networks into client digital asset ecosystem.
• 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.
• 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.
• Work within cross-functional agile teams.
• Partner with Architects, DevOps, Security Specialists, Product Owners, and Blockchain Operations professionals.
• Support technical mentoring and knowledge sharing across engineering teams.

Job description

Role : Java Developer (Blockchain)

Type : Contract

Location : London, UK (Hybrid)

Roles and Responsibilities

Backend Engineering

• Design and develop enterprise-grade backend services using Java.
• Build APIs and microservices supporting digital asset products.
• Develop scalable and resilient systems aligned with banking standards.
• Ensure high availability, security, performance, and maintainability.

Blockchain Development

• Implement blockchain-related business logic and workflows.
• Develop components supporting:
  • Smart contract interactions
  • Minting and burning processes
  • Asset transfer flows
  • Wallet management capabilities
• Integrate external blockchain networks into client digital asset ecosystem.

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.