I'm working with a fast-growing climate-tech non-profit tackling one of the most important infrastructure challenges in the energy transition. Backed by some of the biggest names in climate philanthropy, this is a organisation doing real work - not reports, not consultancy, actual software that shapes energy investment decisions globally.

They're hiring a Lead Backend Engineer to lead a small squad, own the technical direction and get stuck into some genuinely interesting engineering. Think computational complexity, mathematical optimisation, and performance challenges at scale - a long way from your average API job.

• 7+ years experience developing and maintain scalable Python/FastAPI back-end services
• Ideally worked with high-performance APIs for complex hierarchical data queries and grid modelling computations
• Managed and optimised GCP cloud infrastructure, implementing CI/CD pipelines and infrastructure-as-code
• Lead technical planning ...