Senior JVM Software Engineer

Senior JVM Software Engineer (Scala/Java)

6-12-month contract - Inside IR35 - up to 600 per day

London based - hybrid working - 2-3 days onsite

Finance sector - must have previous experience

Our client is seeking a Senior Software Engineer to join a team building a distributed calculation engine used to calculate financial indices and quantitative models. This is a business-critical platform operating within a high-performance financial services environment.

This is primarily a backend engineering role, focused on designing and building new functionality rather than support or maintenance.

• Strong senior-level software engineering background
• Significant commercial experience with JVM technologies (Scala or Java)
• Experience building complex backend or distributed systems
• Strong understanding of software engineering fundamentals, including:
  • Concurrency
  • Testing
  • Design patterns
  • Clean code principles
  • CI/CD practices
• Ability to operate independently and take ownership of complex technical problems
• Strong communication skills
• Hands‑on design and development experience
• Ability to explain architectural decisions and technical trade-offs
• System ownership experience
• Strong Java development skills
• Understanding of how Java applications run in production
• JVM tuning and troubleshooting experience
• Performance optimisation experience