Senior Java Game Engine Developer

Eligo Recruitment Ltd; Greater London; On-site; GBP 60,000 - 80,000; Full time

Job summary

A leading iGaming technology firm in the United Kingdom is seeking a Senior Java Engineer for microservices migration. You'll play a crucial role in transitioning from a monolithic Java platform, ensuring high reliability and performance. The position requires extensive Java expertise and experience in microservices architecture, with a collaborative and delivery-focused engineering culture. Candidates with backgrounds in regulated high transaction environments, such as fintech or retail tech, are encouraged to apply.

Qualifications

• Must have strong commercial Java experience.
• Experience with migrating from monolith to microservices required.
• Solid MySQL experience and strong data modelling skills necessary.
• Deep understanding of service architecture and APIs is essential.

Responsibilities

• Migrate an existing monolithic Java platform to microservices architecture.
• Design new services and refactor existing components with engineering teams.
• Contribute to technical decisions regarding service design and data modelling.

Skills

Strong commercial Java experience

Hands on experience migrating from monolith to microservices

Solid MySQL experience

Deep understanding of service architecture

Experience with scalable, high availability back ends

Comfortable working in Agile/Scrum environments

Excellent written and spoken English

Tools

Spring or Spring Boot

Docker

Kubernetes

CI/CD pipelines

Job description

Overview

Senior Java Engineer - Microservices Migration (iGaming)

Are you a Senior Java Engineer who has led or been deeply involved in moving monolithic platforms to modern microservices architecture? If you enjoy complex systems, large scale integrations and building reliable back ends, this could be a great next step.

Responsibilities

• Play a key role in migrating an existing monolithic Java platform to a modern microservices architecture. This platform powers the company's game engine and integrates their products with multiple operators, so reliability, performance and scalability are critical.
• Work closely with architecture and engineering teams to design new services, refactor existing components, and ensure smooth integration with MySQL and downstream systems. Contribute to technical decision making around service design, data modelling and system performance.
• This is not just a maintenance role. You''ll be actively shaping how the back end evolves, breaking down legacy components and helping build a cleaner, more modular system for the future.

About the Company

You''ll join a well established iGaming technology business that builds high performance systems used by operators across multiple markets. The engineering culture is collaborative, pragmatic and delivery focused, with plenty of opportunity to influence architecture and technical direction.

Essential experience

• Strong commercial Java experience
• Hands on experience migrating from monolith to microservices
• Solid MySQL experience and strong data modelling skills
• Deep understanding of service architecture, APIs and distributed systems
• Experience working on scalable, high availability back ends
• Comfortable working in Agile/Scrum environments
• Excellent written and spoken English
• Ideally you''ll come from sportsbook, iGaming or gambling. However, engineers from other regulated, high transaction environments such as fintech, payments or retail tech will also be considered if you have strong microservices migration experience.

Nice to have

• Spring or Spring Boot
• Docker, Kubernetes or containerised environments
• CI/CD pipelines
• Performance optimisation experience

Apply

If this sounds like a good fit, apply now and we''ll be in touch.

Eligo Recruitment is acting as an Employment Business in relation to this vacancy. Eligo is proud to be an equal opportunity employer dedicated to fostering diversity and creating an inclusive and equitable environment for employees and applicants. We actively celebrate and embrace differences, including but not limited to race, colour, religion, sex, sexual orientation, gender identity, national origin, veteran status, and disability. We encourage applications from individuals of all backgrounds and experiences and all will be considered for employment without discrimination. At Eligo Recruitment diversity, equity and inclusion is integral to achieving our mission to ensure every workplace reflects the richness of human diversity