Developer Operations / DevOps — Bazel Monorepo

Job Title

Developer Operations / DevOps — Bazel Monorepo

Role Summary

The DevOps Engineer will join the Developer Experience team and own the company's Bazel monorepo and CI/CD infrastructure used across ML, systems, firmware, drivers and verification workloads. The role combines build-system engineering with SRE responsibilities: designing reproducible builds and pipelines, improving CI reliability and performance, and providing observability for the engineering organisation.

Experience Level

Mid-level. The role expects roughly 5+ years in software or infrastructure engineering, including at least 3 years working with build systems.

Responsibilities

The core responsibilities focus on monorepo tooling, CI reliability, and observability.

• Design, implement, and maintain Bazel rules and extensions across multiple languages and workloads (Python, C++, Rust, SystemVerilog, ML).
• Scale and optimise a large monorepo to support growth and multi-language builds.
• Create reproducible multi-language build and CI pipelines.
• Debug, triage and resolve CI pipeline failures; perform systematic root cause analysis.
• Improve CI performance across large compute clusters.
• Build and maintain infrastructure monitoring and observability (metrics, dashboards, alerts).
• Define alerting thresholds, runbooks, and incident response workflows for build and CI infrastructure.
• Contribute upstream to Bazel rules and related open-source tooling used by the company.
• Collaborate with engineering teams to shape developer experience and productivity tooling.

Requirements

Core technical requirements and desirable skills.

• Must-have: 5+ years in software or infrastructure engineering.
• Must-have: 3+ years working with build systems and strong hands-on experience with Bazel.
• Must-have: Python scripting and automation skills.
• Must-have: Experience with CI/CD for large-scale products and debugging pipeline failures at scale.
• Must-have: Familiarity with infrastructure monitoring/observability tools (for example Prometheus, Grafana, Datadog).
• Must-have: Working knowledge of SRE principles (SLOs, alerting design, incident management, on-call practices).
• Nice-to-have: Experience across ML workloads, compilers, kernel drivers, hardware simulation or verification.
• Nice-to-have: Prior contributions to upstream Bazel rules or related OSS build tooling.
• May require eligibility checks for UK, US or other export control regulations for certain roles.

Education Requirements

Not specified.

About the Company

Company: Fractile

Headquarters: London, UK

Fractile is on a mission to revolutionize AI by developing silicon, systems, and software that enable the fastest execution of advanced models at lower costs. Established in 2022, the company has rapidly expanded, fostering a collaborative culture in its London and Bristol offices. With a focus on innovation in ML/AI IC product development, Fractile combines hardware and software to deliver high-impact solutions for data center applications.