Principal Backend Architect - Scale, NestJS & AWS Leader

Diesta Limited in London seeks a Principal Backend Engineer to lead the technical evolution of our backend platform. This deeply technical role demands architectural judgment, setting a high engineering bar and helping the team scale a complex, data-intensive system with confidence.

You will own the technical direction across NestJS, Node.js, TypeScript and AWS, design well-typed APIs, enforce clear boundaries, and ensure observable, recoverable operations.