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Signify Technology

Greater London / Global

Lead Software Engineer

Job Description

Overview

Lead Software Engineer - Performance, Scalability & Reliability (AWS) |

We’re on the lookout for a hands-on Lead Software Engineer to take ownership of non-functional requirements for one of our most critical platforms, supporting millions of transactions daily and high-value revenue streams.

You’ll define, develop, and enforce standards for:

  • Performance, scalability, and reliability
  • Observability, capacity planning, and resilience
  • Cloud architecture and cost-efficient scaling (mostly AWS)
  • Automated performance validation integrated into CI/CD pipelines

About you

  • Expert in full-stack, performance, and reliability engineering
  • Proven development experience with Node OR Python architecting and building performant systems
  • Strong knowledge of cloud architecture and how design choices impact throughput, latency, and scaling
  • Hands-on experience with performance testing tools (e.g., JMeter, Gatling, Locust, k6)
  • Comfortable influencing architectural decisions with evidence-backed recommendations

Why this role?

  • Lead the performance and reliability strategy for a high-scale, high-impact platform
  • Shape the technical direction alongside senior architects and engineering leads
  • Work in a collaborative, innovative environment where your insights drive real business outcomes

If you thrive on solving complex system challenges and want to be the authority on performance, scalability, and reliability, this is the role for you. Apply to be considered!

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