Java Developer

Avanti Recruitment is working with a long-established and award-winning UK FinTech firm based in Surrey. They have commodity trading platforms and are now looking to hire a mid-level Java Developer to join their small, collaborative software team.

This is a hands-on role with a strong focus on maintaining and improving a long-standing Java system, while also contributing to the company's journey towards a modern, microservices-based architecture. The successful candidate will spend approximately 70–80% of their time working on legacy systems (Java 8) and the remainder on newer microservices projects (Java 17/21). The company values real-world problem-solvers who are comfortable getting stuck into older codebases and keeping business-critical systems running smoothly.

What You'll Be Doing:

• Enhancing and supporting legacy Java applications
  
  
• Participating in the gradual migration to microservices using Spring Boot and AWS
  
  
• Taking ownership of tasks across the full SDLC — from development and integration to bug fixing and support
  
  
• Working closely with internal stakeholders including trading teams, product owners, and the Head of IT
  
  
• Handling occasional production support issues, context switching between projects and urgent tasks
  
  What they’re looking for:
  
  
• 3–5 years of Java development experience
  
  
• Previous experience working on legacy or monolithic systems
  
  
• Strong Java fundamentals and understanding of OOP
  
  
• Familiarity with Spring / Spring Boot and REST APIs
  
  
• Experience working with SQL databases (MySQL / PostgreSQL)
  
  
• Comfortable working in small teams and wearing many hats
  
  
• Proactive, self-sufficient, and able to work with minimal supervision
  
  Desirable (Not Essential):
  
  
• Exposure to AWS (Aurora, Lambdas, EC2)
  
  
• CI/CD (Jenkins or GitHub Actions)
  
  
• Containerisation (Docker)
  
  
• Front-end knowledge (React or similar)
  
  
• Prior experience in finance or high-availability transactional systems
  
  Benefits:
  
  
• Salary up to £70,000
  
  
• 27 days holiday + bank holidays
  
  
• Private medical cover (post-probation)
  
  
• Life insurance and pension
  
  
• Hybrid working: 3 days in the office (Mon/Tue/Thu), 2 days remote
  
  
• Free parking near the office
  
  This role is not greenfield or bleeding-edge. The team are honest and transparent: there’s a lot of legacy work, but it’s stable and business-critical. If you enjoy solving tough problems in real systems, working in tight-knit teams, and gradually modernising infrastructure the right way, then this role could suit you.
  
  If you are interested in applying then click Apply Now