Senior Back-End Architect — Grid Modelling Platform

TransitionZero is seeking an experienced Lead Engineer (back-end) to lead the team building and scaling the infrastructure behind Scenario Builder, our electricity grid modelling platform. This hybrid role is based in London near Waterloo Station and reports to the Head of Platform.

You will design scalable Python services (FastAPI), build high-performance APIs, manage GCP infrastructure and CI/CD pipelines, and line-manage 3–5 engineers.

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