Staff Backend Engineer: Scale High-Throughput Services

ESL; Greater London; On-site; GBP 110,000 - 180,000; Full time

Job summary

EFG (ESL FACEIT Group) is seeking a Staff Software Engineer - Backend to join the Central Platform Team. You will design, build, and maintain high-throughput services and own the core runtime systems that power our stack, including the Envoy gateway and Kubernetes-based services.

You’ll drive end-to-end projects, shape architectural direction, and mentor others, while balancing quick delivery with robust, secure engineering practices.

Qualifications

• Expert in Go with production-grade backend systems.
• Deep experience with MongoDB, Postgres, Redis/Valkey for data stores.
• Familiarity with authentication/authorisation and secure-by-design principles, given the platform’s remit.

Responsibilities

• Design, build, and optimise high-throughput services over HTTP REST and gRPC on Kubernetes.
• Own and operate the API gateway and service mesh for traffic routing and security.
• Maintain reliability with observability, SLOs, and capacity planning.
• Improve CI/CD pipelines and internal tooling across the stack.
• Contribute to technical direction and cross-team initiatives.
• Lead incident management and root-cause analysis in blameless post-mortems.

Skills

Go backend expert

NoSQL & SQL databases

Authentication & secure-by-design

Tools

Envoy

Istio

Kubernetes

MongoDB

Postgres

Redis/Valkey

Job description

EFG (ESL FACEIT Group) is seeking a Staff Software Engineer - Backend to join the Central Platform Team. You will design, build, and maintain high-throughput services and own the core runtime systems that power our stack, including the Envoy gateway and Kubernetes-based services.

You’ll drive end-to-end projects, shape architectural direction, and mentor others, while balancing quick delivery with robust, secure engineering practices.