Senior Java Engineer

Myn; Greater London; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Hybrid work

Job summary

Myn in London is recruiting for a Senior Java Engineer to join teams building and evolving large-scale, business-critical technology platforms.

You will design, build and enhance Java-based services and APIs as part of an experienced engineering team across development, modernisation and continuous improvement. This role emphasizes performance, resilience and quality in backend systems.

Qualifications

• Strong commercial Java development experience.
• Spring / Spring Boot.
• REST APIs and microservices.
• Experience building distributed, production-grade systems.
• CI/CD and automated testing.
• Good understanding of software design principles and clean, maintainable code.
• Experience working with cloud-based applications.
• Strong problem-solving and troubleshooting skills.
• Comfortable working within Agile engineering teams.
• Experience with AWS or GCP, Kubernetes, Terraform, Oracle, Linux or AI-assisted development tools would be advantageous.
• Previous fintech/payments/banking experience valuable but not essential.

Responsibilities

• Design, build and enhance Java-based services and APIs.
• Participate in the full development lifecycle from design to production support.
• Contribute to improving existing systems and engineering practices, including automation and AI-assisted development.

Skills

Java

Spring Boot

REST APIs

Microservices

CI/CD

AWS

Kubernetes

Agile

Troubleshooting

Cloud

Job description

Senior Java Engineer

London | Hybrid

Myn is recruiting for a major financial services organisation in London and is looking for experienced Senior Java Engineers to join teams building and evolving large‑scale, business‑critical technology platforms.

This is an opportunity to work in an engineering environment where performance, resilience and quality genuinely matter. You’ll be working on backend services that operate at scale, contributing hands‑on code while helping improve the architecture and engineering practices around them.

The role

You’ll design, build and enhance Java-based services and APIs, working as part of an experienced engineering team across new development, modernisation and continuous improvement.

You’ll be involved throughout the development lifecycle, from breaking down requirements and contributing to technical design through to coding, testing, deployment and production support.

There will also be opportunities to improve existing systems, introduce better engineering practices and make greater use of automation and AI‑assisted development.

What we’re looking for

• Strong commercial Java development experience
• Spring / Spring Boot
• REST APIs and microservices
• Experience building distributed, production‑grade systems
• CI/CD and automated testing
• Good understanding of software design principles and clean, maintainable code
• Experience working with cloud‑based applications
• Strong problem‑solving and troubleshooting skills
• Comfortable working within Agile engineering teams
• Experience with AWS or GCP, Kubernetes, Terraform, Oracle, Linux or AI‑assisted development tools would be advantageous.
• Previous experience within fintech, payments, banking, trading or another high‑volume transactional environment would also be valuable, although isn’t essential.

Location: London

Working pattern: Hybrid

If you're an experienced Java Engineer interested in working on complex technology where scalability, performance and reliability matter, we'd like to hear from you.