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SesameSesameSan Francisco, CA

Backend Infrastructure Engineer

Builds developer infrastructure tools including CI/CD pipelines, build systems, and self-serve frameworks to enable fast, reliable engineering workflows. Requires 5+ years experience with Python/TypeScript, automation focus, and dev tooling expertise.

175k – 280k/yr
On-site5+ YOEDevOps / SRE

About the role

Responsibilities

  • Own the developer experience from onboarding through deploy — dev environments, build systems, CI/CD, test infrastructure, and deploy tooling
  • Build frameworks and tooling that make CI fast, reliable, and effortless. Engineers shouldn't have to think about it — it should just work
  • Design self-serve tooling that lets product and ML engineers move quickly without filing tickets or waiting on you
  • Give teams clear, reliable visibility into what's in production, when it shipped, and how it's performing
  • Explore what it means to bring AI-assisted intelligence into developer tooling — this is a genuinely exciting frontier, and we're approaching it thoughtfully
  • Keep the complex systems that support rapid development healthy: build systems, dependency management, test infrastructure, and developer environments all need ongoing care
  • Think creatively about what a performance-sensitive stack — GPUs, co-located servers, real-time requirements — means for the developer environment. There's no established playbook here, and that's part of the appeal

Required Qualifications

  • You're a thoughtful software engineer who also loves infrastructure. You write clean, well-designed code and care about the experience of the people using what you build
  • You've worked on CI/CD systems and have real experience solving the hard problems — slow builds, flaky tests, painful merges — with durable solutions
  • You've built developer tooling that other engineers genuinely wanted to use: self-serve frameworks, CLI tools, build systems, environment setup, or debugging tools
  • You're comfortable in Python and/or TypeScript — our monorepo leans on both
  • You have 5+ years in software engineering, with meaningful time spent on developer infrastructure or tooling
  • Automation is your default. Doing something manually twice feels like a problem worth solving
  • You think from the perspective of the engineers using your work. Developer experience isn't a buzzword to you — it's the whole job

Preferred Qualifications

  • Monorepo tooling and build systems (e.g. Bazel, Pants, Moonrepo, Nx, or similar approaches)
  • Cloud-based development environments (e.g. Coder, Codespaces, devcontainers)
  • CI platform depth — going beyond workflow files into managing runners, optimising costs, and building custom tooling
  • Containerised builds and local/CI parity (e.g. Docker, Dagger)
  • Deploy pipeline patterns: canary deployments, feature flags, automated rollbacks, GitOps
  • AI coding tools — not just using them, but configuring, customising, or building tooling around them
  • Security engineering in developer workflows: dependency scanning, secrets management, supply chain controls
  • GCP experience

Skills

PythonTypeScriptCI/CDBazelPantsDockerGitOpsGCPKubernetesMonorepo

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