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Tolerance Lead Engineer (Contract)

Formula. | london, United-Kingdom | Posted June 11, 2026

Position Overview

Lead Engineer : Up to £700PD : Outside IR35 : Hybrid London : 3 months rolling

A globally scaled technology business is looking for a Lead Engineer to take ownership of its next-generation API platform, with Kafka at the heart of the architecture.

Operating at significant scale, this is a hands-on engagement where you'll have real influence over the direction of a critical engineering pillar - designing and building the event-driven infrastructure that the platform depends on.

Key responsibilities as a Lead Engineer:

  • Architecting and evolving a high-throughput, Kafka-driven event streaming platform
  • Designing cloud-native distributed systems built for scale and resilience
  • Leading the development of event-driven microservices and API integrations
  • Owning security, observability, performance, and long-term maintainability
  • Championing TDD, CI/CD, Infrastructure as Code, and automated test...

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