Senior Platform Engineer, StackOne
2+ days a week in office
Integration infrastructure for AI agents
Posted today
Integration infrastructure for AI agents
21-100 employees
Posted today
2+ days a week in office
21-100 employees
Company mission
To build the integration infrastructure that lets AI agents act — securely, reliably, across any system.
Role
Who you are
- 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 and patterns 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 ability 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 enjoy partnering with security rather than routing around it
- A clear writer: you produce docs and runbooks that both internal engineers and external customers can follow
- You own work end-to-end (scope, ship, measure) and automate instead of running manual checklists
- (Preferred) Experience shipping software into customers' own cloud or on-prem (BYOC / self-hosted distribution), or with a platform like Nuon, Replicated, or Omnistrate
- (Preferred) Multi-cloud (GCP or Azure) IaC, and exposure to Temporal, Kafka/MSK, ClickHouse, or OpenSearch
What the job involves
- We're looking for a Senior Platform Engineer to own how StackOne is built, shipped, and run, as we scale across our own cloud and into our customers' clouds
- You'll own the infrastructure behind the platform, our deployment pipeline and developer tooling, and how we package StackOne to run inside customers' own AWS, GCP, or Azure accounts
- It's a hands-on role with broad scope
- You write code and tooling, you own the IaC other engineers depend on, and you set the standard for how every new repository gets deployed and secured
- You'll report directly to the CTO and work closely with our Security Engineer and tech leads
- 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 our deployment pipeline and test tooling 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
- Own how we deploy into customers' own clouds (self-hosted / BYOC): the Terraform modules, container images, runbooks, and documentation for both internal teams and customers
- Build 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 to define how new projects (customer-facing product, internal tools, and vibe-coded prototypes alike) get deployed and secured from day one. Templates, golden paths, and guardrails, not gatekeeping
- Raise reliability: SLOs, observability, and incident response for the platform. 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 LLMs and agents to accelerate platform work (IaC generation, test scaffolding, runbook drafting) with guardrails you trust
- We're pragmatic about tooling. Today's stack includes:
- Cloud & infra: AWS (ECS Fargate, Aurora Postgres, ElastiCache, MSK, OpenSearch, Lambda, S3, KMS, CloudFront, WAF), Cloudflare (Workers, WAF)
- IaC: AWS CDK today, migrating to Terraform
- Data & messaging: Postgres, Redis, Kafka, OpenSearch, ClickHouse
- CI/CD: GitHub Actions
- Observability & analytics: Datadog, Sentry, Metabase
- Languages: TypeScript (Node.js), Python
Salary benchmarks
Our take
The explosion of SaaS tools has created an integration nightmare for companies. More and more B2B customers are expecting their SaaS tools to integrate with each other natively. But building and managing API connections in-house as a software vendor is time-consuming and costly, diverting teams from their core roadmap and stopping sales teams from selling.
As the next-generation integration platform, StackOne is solving the challenge of building SaaS integrations at scale once and for all. Founded in 2023 by ex-Google and Oracle executives, StackOne has seen exceptionally fast growth since its launch. With its best-in-class security and real-time architecture, the company is well-positioned to become a category leader in the API integration solutions market.
Steph
Company Specialist at Welcome to the Jungle
Company
Funding (last 2 of 3 rounds)
Apr 2025
$20m
Series A
Nov 2023
$3.6m
Seed
Total funding: $23.9m
Company benefits
- Meaningful share options (EMI) - share in the company's success as we grow
- 25 days holiday + 1 additional day per year of tenure
- Hybrid working friendly - typically 2 days/week in our London office. We’re open to discussing flexible arrangements—please share any preferences in your application
- Private health insurance - including dental & optical
- £15/day lunch budget when working from our London office, up to £120/month
- £1,000 for your home office set up + £500/year top-up
- Health, fitness and gift card discounts
- Cycle2Work and Electric Car Scheme
- Monthly in-person socials
- Annual team offsite to sunny spots (last ones were in Spain and Portugal!)
Company HQ
Central London
Articles
Leadership
Romain Sestier
(Co-Founder & CEO)Previously worked for Google as co-founder and Product Lead of Area120, VP of Product and Sales at Yieldify, co-founder and CEO of Upper.ai and Head of UK Professional Services at ContentSquare.
Guillaume Lebedel
(Co-Founder & CTO)Previously VP of Engineering at Yieldify until its acquisition by Epsilon/Publicis. Also co-founded another start-up and worked at Maxymiser (acq. by Oracle) as a developer.
Diversity, Equity & Inclusion at StackOne
Yasmin Chalmers (Head of People)
- Women @ StackOne community
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