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.

The Role

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.

Key Responsibilities