DevOps Engineer (Senior) - Bazel Monorepo

DevOps Engineer — Bazel Monorepo Fractile · London or Bristol · Full-time · Hybrid (3 days onsite) About Fractile Fractile is building silicon, systems, and software that will redefine the frontier of AI — running the world's most advanced models at radically higher speed and lower cost. Founded in 2022, our fast-growing team spans hardware and software, working hand in hand to deliver a new class of ML hardware from first principles. If you want to build infrastructure that every engineer in the company depends on, this is the role.

The Role We're looking for a Senior DevOps Engineer to own our Bazel monorepo and CI/CD infrastructure at Fractile — designing the tooling, pipelines, and observability that power everything we build, from ML models and kernel drivers to hardware simulation. You'll bring both deep build system expertise and an SRE mindset: owning reliability, debugging CI failures systematically, and giving the engineering organisation clear visibility into how our infrastructure is performing. Your work will become the foundation every engineer at Fractile builds on.

That's the scope, and that's the opportunity.

What We'Re Looking For

g. Prometheus, Grafana, Datadog, or similar) Working knowledge of SRE principles — SLOs, alerting design, incident management, and on-call practice Why Fractile Work at the frontier of AI hardware on genuinely novel engineering problems A collaborative culture built on curiosity, initiative, and technical depth Hybrid working: 3 days onsite (London or Bristol), 2 days remote Modern offices in London and Bristol — choose your base Competitive salary and equity in a fast-growing company Fractile is committed to building a diverse and inclusive team. We welcome applications from people of all backgrounds and actively encourage candidates from underrepresented groups to apply.