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Infrastructure Software Engineering – Platform & Build

Fractile· Software
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LondonFull-timePosted 3mo ago

About the role

Infrastructure Platform Engineer focused on end-to-end CI, platform observability, infrastructure as code, and Bazel-based monorepo growth to support Fractile's AI hardware/software stack.

Responsibilities

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

Qualifications

  • 5+ years in software, platform, or infrastructure engineering
  • 5+ years hands-on experience working with CI/CD for large-scale products, including monitoring, debugging performance and resolving pipeline failures at scale
  • 3+ years working with build systems, preferably modern cross-language build systems with emphasis on correctness, high performance and extensibility (e.g. Bazel, Buck, Pants, Please)
  • Experience with infrastructure as code (Terraform / OpenTofu, or Pulumi)
  • Experience with monitoring and observability tooling (Prometheus, Grafana, or similar)
  • Working knowledge and practice of DevOps / SRE principles: SLOs, alerting design, incident management, and on-call practice
  • Strong proficiency in at least one systems or scripting language used for tooling (Python preferred; Go or Rust also relevant) with a track record of shipping well-tested, maintainable developer tooling

Skills

Required:CI/CD for large-scale productsBuild systems (cross-language)DevOps / SRE principlesProgramming/Scripting

Benefits

  • Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role.
  • Equity & Ownership: meaningful equity so everyone shares in the value creation.
  • Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance.
  • Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. Equal Employment Opportunity and inclusive environment.
Last updated Sep 24, 2026. Interested? Apply on the company site.
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About Fractile

Radically Accelerate Frontier Model Inference

Fractile is designing AI compute systems that will enable the next generation of AI scaling: frontier model inference, 25x faster, at 1/10th the cost.

frontier model inferenceAI computecompute systemsAI scalinginference hardwareprocessor innovation
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