Principal Java Developer - VP Java, Spring Boot, AWS

Principal Java Developer - VP | Java, Spring Boot, AWS | Investment Banking

Central London - Hybrid (Tuesday, Wednesday and Thursday in the office)
c£130,000 + bonus | Permanent

A global investment bank is looking for a hands-on Principal Java Developer to take technical ownership of a business-critical trading technology platform. You'll stabilise it, modernise it and lead its migration to AWS.
This is a senior engineering role for someone who still writes code every day. You'll work closely with the platform architect, set technical direction, and guide a team of experienced engineers and contractors.

The role

• Investigate and resolve complex technical issues across a large trading platform, including P&L and trade services
• Improve platform stability, reliability, performance and latency
• Design and build new services using modern Java (Java 25) and Spring Boot
• Lead the migration of existing applications to AWS, replacing legacy frameworks with cloud-native solutions
• Support the migration of the caching layer to Redis
• Use AI-assisted development tools (e.g. Amazon Kiro) to analyse legacy code and accelerate refactoring
• Provide technical leadership and mentoring while staying hands-on

Essential experience

• Extensive enterprise Java development, with recent hands-on p...