Senior Technical Specialist

Job Summary

• 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.

Key Responsibilities

• Senior delivery or consulting leadership in banking or payments.
• Has led an option evaluation or vendor selection at a regulated bank, from criteria to decision.
• Working knowledge of stablecoins, tokenised deposits and the EU context (MiCA, DORA): enough to frame the decision, not to own regulatory advice.
• Facilitates executive forums and holds a position under challenge.
• Commercial judgement on total cost of ownership and vendor terms.

Skill Requirements

• Exposure to bank consortia for digital money (for example Qivalis or Swift-led initiatives).
• Payments modernisation programmes.
• Dutch language.

Other Requirements

• Engagement plan and dependency register
• Signed-off gates, criteria and weights
• Recommendation pack and readout
• Engine roadmap and Day 0 team outline