Principal Infrastructure Platform Engineer: CI/CD & Builds

korecv; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Private Medical

Dental and Vision

Contributory Pension

25 Days holiday

Life/Critical Illness Insurance

Equity & Ownership

Job summary

Fractile is seeking an Infrastructure Platform Engineer to join the core software team in London. You will own the CI stack and end-to-end pipelines across Python, C++, Rust, SystemVerilog, and ML workloads.

You will build and maintain observability, incident response workflows, and infrastructure-as-code for hybrid cloud and on‑prem resources, enabling rapid and reliable engineering delivery.

Qualifications

• 5+ years in software, platform, or infrastructure engineering.
• 5+ years hands-on experience with CI/CD for large-scale products, including monitoring and debugging pipelines.
• 3+ years working with cross-language build systems (Bazel, Buck, Pants, Please, etc.).
• Experience with infrastructure as code (Terraform/OpenTofu, or Pulumi).
• Experience with monitoring and observability tooling (Prometheus, Grafana, or similar).
• Working knowledge of DevOps/SRE principles: SLOs, alerting, incident management, on-call practice.

Responsibilities

• Own the CI infrastructure end-to-end: create, maintain and debug reproducible multi-language CI pipelines.
• Build and maintain infrastructure observability, alerting, runbooks, and incident response workflows.
• Own infrastructure as code, automating provisioning of hybrid cloud and on-prem resources.
• Scale and maintain Fractile's Bazel monorepo as we grow across Python, C++, Rust, SystemVerilog, and ML workloads.
• Shape the infrastructure and platform experience for every engineer at Fractile.

Skills

CI/CD

Python

Go

Rust

C++

Tools

Bazel

Terraform

OpenTofu

Pants

Please

Job description

Fractile is seeking an Infrastructure Platform Engineer to join the core software team in London. You will own the CI stack and end-to-end pipelines across Python, C++, Rust, SystemVerilog, and ML workloads.

You will build and maintain observability, incident response workflows, and infrastructure-as-code for hybrid cloud and on‑prem resources, enabling rapid and reliable engineering delivery.