We are looking for an experienced and driven Principal Engineer focused on Java Back End expertise to guide and build one of two brand-new product teams based in Oxford You''ll serve as both the lead engineer and line manager, taking ownership of our client''s core transformation projects. This role offers a unique opportunity to make a tangible impact on critical user-facing products. In this role, you will: Lead a new squad of 4 engineers and a Product ManagerBe responsible for re-architecting an existing product with zero customer downtimeRemain hands-on in Java and Micronaut, JavaScript/TypeScript, contributing code weeklyDefine and uphold best engineering practices and team standardsInfluence architectural decisions and identify opportunities to simplify complex systemsCoach and grow your engineering team, fostering a collaborative, low-ego cultureThe ideal candidate: Has strong coding skills in Java and JavaScript/TypeScript, with proficiency in AngularEnjoys working with Legacy systems and improving themHas prior experience as a Tech Lead or Engineering ManagerComfortably navigates technical architectural decisions and system design trade-offsUnderstands how to balance high-quality engineering with efficient deliveryCommunicates clearly with technical and non-technical stakeholders alike