Senior Infrastructure Platform Engineer: CI, Bazel & SRE

Fractile; Tottenham; Hybrid; GBP 80,000 - 120,000; Full time

Benefits offered by this job

Equity & Ownership

Private Medical, Dental and Vision

Contributory Pension

25 Days holiday + bank holidays

Job summary

Fractile is seeking an Infrastructure Platform Engineer to join the core team responsible for the platform that powers our AI inference systems. You will own CI pipelines, observability, and IaC, enabling rapid, reliable development across multiple languages and runtimes.

You will collaborate with hardware, software and research teams to scale and secure our hybrid cloud and on‑prem infrastructure, ensuring high availability and performance for all engineers at Fractile.

Qualifications

• 5+ years in software, platform, or infrastructure engineering.
• 5+ years hands‑on experience with CI/CD for large‑scale products.

Responsibilities

• Own the CI infrastructure end‑to‑end: create, maintain and debug reproducible multi‑language CI pipelines; optimize CI performance across large compute clusters.
• 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 the Bazel monorepo across Python, C++, Rust, SystemVerilog, and ML workloads.
• Shape the infrastructure experience for every engineer at Fractile.

Skills

CI/CD

Build systems

SRE mindset

Observability

Infrastructure as code

Python

Go/Rust

Tools

Bazel

Terraform

OpenTofu

Pulumi

Prometheus

Job description

Fractile is seeking an Infrastructure Platform Engineer to join the core team responsible for the platform that powers our AI inference systems. You will own CI pipelines, observability, and IaC, enabling rapid, reliable development across multiple languages and runtimes.

You will collaborate with hardware, software and research teams to scale and secure our hybrid cloud and on‑prem infrastructure, ensuring high availability and performance for all engineers at Fractile.