Platform Engineer - Build & CI

Here at Humanoid, we believe in a future where robots amplify human potential. That’s why we’ve set out on a mission to build the world’s most capable, commercially-scalable, and safe humanoid robots. We’re bringing that mission to life with HMND‑01 - our rapidly developed humanoid platform being deployed in real industrial environments - and we’re growing the team to take it even further.

About the Role We are looking for a Software Engineer to own the build system and CI infrastructure that every engineer at Humanoid depends on every day. This is foundational work, because a slow, unreliable, or opaque build pipeline is a tax on the entire engineering organisation, and getting it right directly determines how fast we can ship robots. We are investing heavily in build infrastructure - hermetic, incremental, fully cached builds across a complex multi-target monorepo spanning firmware, robot software, simulation, and cloud . We need someone to drive that work, own the system it produces and wants to a front-row seat in the world of fleet robotics. This is a deeply technical infrastructure role. You will work closely with every engineering team in the organisation, and the quality of your work will be felt by every person who opens a PR.

What You’ll Do Build and maintain CI pipelines in GitHub Actions: incremental test selection based on affected targets, nightly full builds, and clear triage tooling when main goes red

Instrument the build: CI telemetry, dashboards showing build and test times broken down by job type, branch, and author — so we stop flying blind on build health

Define and enforce the policies that keep main green: merge queue configuration, PR gating, and the on-call process when broken builds block other engineers

Own and maintain the remote build cache infrastructure, ensuring cache correctness, invalidation on environment changes, and read-only promotion from main only

Own the developer environment story — local builds, dependency management, and the tooling that lets engineers iterate quickly without fighting their environment

Maintain and evolve the dependency mirroring infrastructure (apt, PyPI, and other upstream registries) so that external package availability never blocks a build

What We’re Looking For Solid experience with build systems - ideally Bazel, but deep knowledge of CMake or similar is fine; the instincts matter more than the specific tool

Experience designing and operating CI pipelines at scale: incremental testing, artifact caching, runner management, and keeping feedback loops short

Strong understanding of hermetic build environments

Comfort debugging complex build failures across multiple languages and toolchains

Experience with dependency management and the tradeoffs between reproducibility, speed, and upstream risk

Good instincts for developer experience

Nice To Have Familiarity with ROS/ROS2 build tooling (colcon, ament, CMake)

Familiarity with Kubernetes: self-hosted runners, ARC

Experience with GitHub Actions at scale

Background in robotics or embedded systems where build artifacts span multiple target architectures and deployment environments

What We Offer Competitive equity: stock options with meaningful upside as we scale.

30+ paid days off, including 23 days of annual leave, all UK bank holidays, and additional company closure days (including Christmas–New Year shutdown).

Private healthcare, including virtual and in-person care.

Pension scheme with 8% total contribution (5% employee, 3% employer) on full earnings.

Free daily breakfast, catered lunch, and snacks in-office.

Work at the frontier - collaborate daily with world-class engineers, researchers, and product experts building the next generation of AI and humanoid robotics.

Real ownership - direct access to founding leadership, meaningful input on product direction, and the ability to drive key initiatives from day one.