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DevOps Engineer

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: Dex
Full Time position
Listed on 2026-06-18
Job specializations:
  • IT/Tech
    SRE/Site Reliability, IT Infrastructure
Salary/Wage Range or Industry Benchmark: 140000 GBP Yearly GBP 140000.00 YEAR
Job Description & How to Apply Below
Position: DevOps Engineer (up to £140k)
Location: Greater London

This company builds the intelligence layer that intercepts scams before payments clear. They protect major banks from fraud in real‑time, a high‑stakes problem with immediate impact. Backed by leading investors, they're rapidly expanding their platform internationally. You'll be the first dedicated Dev Ops Engineer, owning the reliability of a 24/7 investigation engine that runs on live payment flows. This isn't a maintenance role;

it's about building the foundations for AI‑native infrastructure, defining incident response culture, and evolving a complex Terraform estate on GCP. You'll solve a harder version of the observability problem: monitoring non‑deterministic AI agents where “correct” isn't always identical.

The work
  • Design and implement observability for a 24/7 real‑time system, specifically tackling the challenge of non‑deterministic AI agents.
  • Own the Terraform estate on GCP, evolving infrastructure as the platform scales to new financial institutions.
  • Define and embed the incident response culture, building processes that ensure rapid resolution and continuous improvement.
  • Build and refine CI/CD pipelines, ensuring high deploy velocity without compromising safety for a fast‑moving engineering team.
  • Establish security best practices across the infrastructure, from network security to secrets management, making secure‑by‑default the standard.
What You Bring
  • 5+ years in Dev Ops or SRE, with significant experience as a first or sole infrastructure hire in an early‑stage environment.
  • Deep expertise with Terraform, managing complex production infrastructure on a major cloud provider (GCP preferred).
  • A proven track record designing and implementing observability for distributed systems, ideally including non‑deterministic or ML‑powered components.
  • Hands‑on experience with incident response, including on‑call duties, leading incidents, and building robust processes.
  • Strong foundations in infrastructure security: network, access control, secrets management, and secure‑by‑default principles.
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