Principal Java Engineer (Individual Contributor) 6-Month Contract | Outside IR35 | Paddington (3 days/week)
We are partnering with a leading UK retail organisation on a significant payments and platform transformation. We seek a Principal Java Engineer to join as a hands‑on individual contributor, playing a pivotal role within a dynamic engineering team.
This technically demanding position centres on designing, building, and scaling high-volume, mission‑critical payment systems. You will remain deeply involved in coding while influencing design and technical direction.
As a Principal Java Engineer, you will design and develop scalable backend services that facilitate secure payment transactions at scale. The environment is modern, cloud‑native, and prioritises event‑driven architecture and high performance.