Blockchain Engineer

Ubique Systems UK Limited; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Ubique Systems UK Limited is seeking senior Backend and Blockchain Engineers to design and develop enterprise-grade services for digital asset products. You will build APIs, microservices, and blockchain integration components in a fast-paced, banking-standard environment.

The role requires 5+ years in software engineering or architecture, strong stakeholder skills, and fluent English. You will join cross-functional agile teams in a London-based setting supporting scalable, secure systems.

Qualifications

• 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).

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.
• Blockchain-related business logic and workflows implementation.
• Develop components supporting Smart contract interactions, minting/burning processes, asset transfer flows, and wallet management.
• Integrate external blockchain networks into client digital asset ecosystem.
• Build integrations with digital asset custody and wallet providers.
• Collaborate on SaaS blockchain platform implementation initiatives.
• Follow secure coding and software engineering best practices.
• Participate in architecture reviews and design discussions.
• Support production readiness and security/compliance requirements.
• Work within cross-functional agile teams with architects, DevOps, and product owners.

Skills

Years of experience

Stakeholder management

Analytical thinking

Agile experience

English communication

Backend engineering experience

Education

Bachelor's degree in Computer Engineering/Software Engineering

Tools

Java

Kotlin

Spring Boot

REST APIs

Microservices

Job description

Minimum Qualifications

• 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)

Technical Skills

Strong experience in:

• Java (preferred)
• Kotlin
• Spring Boot
• REST APIs
• Microservices Architecture

Experience with

• Event-driven architectures
• Kafka
• RabbitMQ or similar messaging technologies
• SQL and NoSQL databases
• Containerization (Docker)
• Kubernetes
• CI/CD pipelines
• Git-based development workflows

Good understanding of

• Distributed systems
• System integration
• API design
• Scalability patterns

Roles and Responsibilities

Backend Engineering

• Design and develop enterprise-grade Back End 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.