> Markdown version of [/jobs/ext/2818176-senior-platform-engineer-up-to-120k](https://www.wearedevelopers.com/jobs/ext/2818176-senior-platform-engineer-up-to-120k). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior Platform Engineer (up to £120k)

- **Company:** Dex
- **Location:** Greater London, UK
- **Experience:** Expert
- **Salary:** £120,000.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Distributed Systems, Key Management, Delivery Pipeline, Terraform
- **Published:** September 10, 2026
- **Apply:** https://www.collegerecruiter.com/job/2859576550-senior-platform-engineer-up-to-120k

## About the Role

* Strong, hands-on Terraform experience running real production infrastructure; GCP experience is a plus.
 * Built monitoring, alerting, and dashboards for distributed systems, with exposure to non-deterministic or ML-powered systems.
 * Experience on-call, running incidents calmly, and writing post-mortems that prevent recurrence.
 * Understanding of security fundamentals: least-privilege access, secrets management, and secure-by-default infrastructure design.
 * 5+ years working in early-stage companies, comfortable defining best practices where no playbook exists.

## Description

Banks need to screen payments in real time, intercepting scams while letting genuine transactions flow. This company builds the intelligence layer that makes that possible, increasingly powered by AI agents whose behavior isn't static. They're live with UK banks, showing contextual warnings significantly more effective than generic screens, and are backed by leading investors. This isn't a 'keep the lights on' role. You'll own the reliability and operability of production systems, defining what good looks like for Platform at a company shipping to large banks with a small, high-calibre engineering team. Expect to balance enterprise resilience with startup velocity, building observability for non-deterministic AI behavior and driving incident response maturity from first detection to post-incident learning., * Own the reliability and operability of production systems, including monitoring, alerting, and incident response.

 * Build observability specifically for AI-agent behavior, where traditional methods fall short.
 * Maintain and evolve infrastructure-as-code (Terraform on GCP), making the safe and secure path the easy default.
 * Drive incident response maturity, from detection through to follow-up and post-incident learning.
 * Implement deployment pipelines, release tooling, and developer experience improvements to unblock the engineering team.


## Related Videos

- [Infrastructure as Code: The Developer's Secret Weapon](https://www.wearedevelopers.com/videos/1221-infrastructure-as-code-the-developer-s-secret-weapon)
- [This Machine Ends Data Breaches](https://www.wearedevelopers.com/videos/574-this-machine-ends-data-breaches)
- [How will artificial intelligence change the future of software testing?](https://www.wearedevelopers.com/videos/85-how-will-artificial-intelligence-change-the-future-of-software-testing)
- [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops)
- [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform)
- [Terraform for Developers](https://www.wearedevelopers.com/videos/3-terraform-for-developers)

## Related Articles

- [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)
- [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again)
- [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)
- [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers)
- [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)
- [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs)