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

Sector: DevOps & EngineeringReference: BBBH189943_1794392849Principal Java Developer - VP | Java, Spring Boot, AWS | Investment BankingCentral London - Hybrid (Tuesday, Wednesday and Thursday in the office)c130,000 + bonus | PermanentA 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 roleInvestigate and resolve complex technical issues across a large trading platform, including P&L and trade servicesImprove platform stability, reliability, performance and latencyDesign and build new services using modern Java (Java 25) and Spring BootLead the migration of existing applications to AWS, replacing legacy frameworks with cloud-native solutionsSupport the migration of the caching layer to RedisUse AI-assisted development tools (e.g. Amazon Kiro) to analyse legacy code and accelerate refactoringProvide technical leadership and mentoring while staying hands-onEssential experienceExtensive enterprise Java development, with recent hands-on production codingStrong Spring Boot and Spring ecosystem expertiseHands-on AWS experience, ideally gained on a cloud migration or modernisation programmeContainerisation and cloud-native application designFinancial services experience, ideally trading, front office or risk systemsSolid understanding of functional programming conceptsStrong architectural knowledge, and comfort working independently in complex environments with limited documentationDesirable experienceScala (preferred), C++ or PythonRedis, Hazelcast or other distributed cachingLow-latency systems, idempotency and reliable processingDay-to-day use of AI coding assistantsWhat's on offerVP-level Principal role with real influence over technical directionLarge-scale AWS modernisation programmeModern stack for new development: Java 25, Spring Boot, AWS, Redis, AI-assisted engineeringCompetitive base salary of c130K plus bonusConsistent hybrid pattern: Tuesday to Thursday in central London, Monday and Friday remoteCore hours 8:30-17:00ApplyApply now with a concise CV highlighting your Java, Spring Boot and AWS experience. Shortlisted candidates will receive full client details and a detailed briefing.Lorien is acting as an employment agency in relation to this vacancyGuidant, Carbon60, Lorien & SRG - The Vertage Group Portfolio are acting as an Employment Business in relation to this vacancy.