Senior Platform Engineer

StackOne

Senior Platform Engineer managing AWS infrastructure and deployment pipelines for StackOne's scalable integration platform. Collaborating closely with the Security Engineer and tech leads on secure and efficient deployments.

Posted 6/1/2026full-timeLondon • 🇬🇧 United KingdomSeniorWebsite

Tech Stack

Tools & technologies

AWSDockerGoKubernetesPythonTerraformTypeScript

About the role

Key responsibilities & impact

Own our infrastructure at scale: the AWS estate today (ECS Fargate, Aurora, ElastiCache, MSK, OpenSearch, Lambda, KMS) and the AWS CDK to Terraform migration. Keep it reliable, observable, and cost-aware.
Build out the deployment pipeline as we consolidate toward a monorepo: the CI/CD that ships every service, plus an automated end-to-end testing harness with incremental (affected-only) testing that stays fast as we grow.
Ship into customers' own clouds (self-hosted / BYOC): the Terraform modules, container images, runbooks, and documentation for internal teams and customers.
Own the release and upgrade path for self-hosted customers: versioned, signed releases, a supported-version policy, and a call-home for usage and version reporting.
Set the standard for new repositories: partner with the Security Engineer and tech leads so new projects (product, internal tools, and vibe-coded prototypes) ship secure and deployable from day one. Templates and golden paths, not gatekeeping.
Raise reliability: SLOs, observability, and incident response. Make the system easy to operate when something breaks at 3am.
Treat infrastructure as a product: paved roads and self-serve tooling so product engineers ship without waiting on you.
Use AI in the workflow: lean on LLMs and agents for IaC generation, test scaffolding, and runbook drafting, with guardrails you trust.

Requirements

What you’ll need

4+ years in platform, infrastructure, SRE, or DevOps, with hands-on AWS at scale: ECS/Fargate, RDS/Aurora, Lambda, networking, IAM, KMS.
Deep IaC ability: Terraform and/or AWS CDK, comfortable owning modules other teams build on.
Strong CI/CD and monorepo build experience: caching and incremental/affected-only test execution. You've made a slow pipeline fast.
Strong coding in TypeScript, Python, or Go. You build tooling, not just YAML and configs.
Containers in production (Docker); Kubernetes a plus.
Security-minded: you bake secure defaults into pipelines and repo templates, and partner with security rather than routing around it.
A clear writer: docs and runbooks that internal engineers and external customers can follow.
End-to-end ownership: you scope, ship, and measure, and automate instead of running manual checklists.

Benefits

Comp & perks

Meaningful share options (EMI)
25 days holiday + 1 additional day per year of tenure
Private health insurance, including dental & optical
£15/day London office lunch budget, up to £120/month
£1,000 home office setup + £500/year top-up
Annual team offsite to sunny spots
Join one of Europe's fastest-growing startups
Work with a veteran team of ex-Google, Microsoft, Oracle, Coinbase, JP Morgan and more
Health, fitness and gift card discounts; Cycle2Work and Electric Cars scheme

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

AWSECS FargateAuroraElastiCacheMSKOpenSearchLambdaKMSTerraformCI/CD

Soft Skills

reliabilityobservabilityincident responseclear writingend-to-end ownershipsecurity-minded