Blockchain Engineer

Design the future architecture of one of Europe's most innovative banking networks while empowering engineers to do their best work.

We are looking for a Blockchain Engineer to join ING's Digital Asset Services (DAS) organization and help build the next generation of digital asset capabilities.

This role combines strong backend engineering expertise with practical knowledge of blockchain technologies. The successful candidate will design and develop scalable services supporting wallet management, digital asset operations, custody workflows, and integrations with external blockchain networks and custody platforms.

The ideal candidate is fundamentally a strong Java engineer who understands blockchain concepts and can bridge traditional banking systems with emerging digital asset ecosystems.

At ING Hubs Türkiye, flexibility is more than a benefit—it's part of how we work.

Our hybrid way of working is designed to balance collaboration, innovation, and personal flexibility. Team members typically come together at our Vadistanbul office for two days per week during three weeks of the month, while one week each month is fully remote.

We also provide additional flexibility throughout August with remote working opportunities, allowing colleagues to remain productive while staying connected with their teams.

As part of a globally distributed organization, you'll collaborate with colleagues across multiple ING locations and contribute to solutions used across the bank.

You will join an international technology organization where ownership, knowledge sharing, collaboration, and engineering excellence are at the heart of everything we do.

Our teams design and deliver critical technology platforms that support ING's digital transformation journey. We believe scalable architectures, strong engineering practices, automation, and continuous learning are essential for delivering reliable solutions at scale.

• 5+ years of experience in software engineering, solution design, or architecture roles
• Strong stakeholder management experience across business and technology domains
• Strong analytical and problem-solving capabilities
• Experience working in Agile organizations
• Bachelor's degree in Computer Engineering, Software Engineering, or a related discipline
• Fluent English communication skills (C1 level or above)

Strong experience in:

• Kotlin
• Spring Boot
• REST APIs

Experience with:

• Event-driven architectures
• Kafka
• RabbitMQ or similar messaging technologies
• SQL and No
  
  SQL databases
• Containerization (Docker)
• Git-based development workflows

Good understanding of:

• Distributed systems
• System integration
• Scalability patterns

• 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 and burning processes
• Wallet management capabilities
• Integrate external blockchain networks into ING's 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…