EngineeringOn-siteMid senior

Infrastructure Software Engineering - Platform & Build

Fractile · Bristol and London

Fractile builds its own chips and systems so frontier AI models can produce output at thousands of tokens per second. This infrastructure engineer looks after the platform every Fractile engineer depends on: the multi-language Bazel monorepo, the CI pipelines and the tooling around them.

Apply on Fractile

Company: Fractile
Where: Bristol and London
Function: Engineering
Posted: 1 week ago
Seniority: Mid senior
Work mode: On-site
Categories: AI & ML DeepTech SaaS

The role

What you’ll do

Own CI end to end, keeping multi-language pipelines reproducible and fast across large compute clusters
Build observability, alerting, runbooks and incident response for the company's infrastructure
Manage infrastructure as code that provisions both hybrid cloud and on-prem resources
Scale the Bazel monorepo as it grows across Python, C++, Rust, SystemVerilog and ML work

What you’ll need

5+ years in software, platform or infrastructure engineering, with 5+ years running CI/CD at scale
3+ years with modern cross-language build systems such as Bazel, Buck or Pants
Hands-on Terraform, OpenTofu or Pulumi, plus Prometheus, Grafana or similar monitoring
Solid SRE practice (SLOs, alerting, on-call) and strong Python, Go or Rust for developer tooling

Good to know: Full time, based in London or Bristol. Equity, private medical, dental and vision, 25 days' holiday plus bank holidays. Some roles may need export-control eligibility checks.