GRAIL is seeking a Build Engineer to join our DevOps / Platform Engineering organization. Our team builds and operates the infrastructure, tooling, and developer platforms that engineering and research teams rely on to move quickly and safely, from local development environments through builds, tests, CI/CD, and release.

In this role, you will focus on developer experience: reducing friction in day-to-day engineering workflows and making complex, multi-language systems easier to build, test, and maintain. You will own and improve build-system workflows in our Bazel-based monorepo, raise CI reliability and performance, and build internal tooling and self-service automation used across engineering and research. This is a high-leverage role with broad visibility, your work directly accelerates teams working on early cancer detection.

This role is based in Sunnyvale, California. We are moving to our new headquarters in September so you may visit our current Menlo Park, CA location for interviews if they occur prior to the move. This role offers a flexible work arrangement, with the ability to work from GRAIL's office or from home. Our current flexible work arrangement policy requires that a minimum of 60%, or 24 hours, of your total work week be on-site. Your specific schedule, determined in collaboration with your manager, will align with team and business needs and could exceed the 60% requirement for the site. At our Sunnyvale campus, Tuesdays and Thursdays are the key days where we encourage on-site presence to engage in events and on-site activities.

Responsibilities

• 4+ years of experience working on build systems, CI/CD, or developer productivity / platform tooling.
• 2+ years of hands-on experience with a large-scale build system (for example Bazel, Buck, Pants, Gradle, or CMake).
• 2+ years of experience building and maintaining CI/CD pipelines in GitLab CI, GitHub Actions, Jenkins, or a comparable system.
• 3+ years of professional coding experience in one or more of Go, Python, TypeScript, or Java.
• 1+ years of hands-on experience with AWS and containerized workloads on Kubernetes.
• BS in Computer Science or a related technical field, or equivalent experience.

Preferred Qualifications

• Production Bazel experience, especially in a large, multi-language monorepo.
• Experience with Bazel rules and toolchains, remote caching, remote execution, test sharding, or build performance optimization.
• Experience with dependency management, hermetic and reproducible builds, and test infrastructure at scale.
• Experience improving developer experience in a mixed-language engineering environment (Go, Python, TypeScript, Java).
• Experience building internal CLIs, automation, release tooling, or self-service developer platforms.
• Experience defining and using developer-productivity metrics to prioritize work and demonstrate impact.
• Experience diagnosing and reducing CI flakiness, build nondeterminism, and long-tail pipeline failures.
• Experience supporting scientific, research, or data-intensive teams, including Python packaging and container image workflows.
• Strong debugging skills across complex, multi-team build, test, and pipeline failures.
• Clear communication and collaboration skills, with a track record of working directly with developers, researchers, and platform engineers.
• Comfortable using modern AI coding agents as part of day-to-day engineering work while applying sound engineering judgment.
• Experience mentoring engineers or driving adoption of tooling and standards across teams.

The expected base salary range for this position is $136,000 to $180k

This role may be eligible for other forms of compensation, including an annual bonus and/or incentives, subject to the terms of the applicable plans and Company discretion. This range reflects a good-faith estimate of the range that the Company reasonably expects to pay for the position upon hire; the actual compensation offered may vary depending on factors such as the candidate's qualifications. Employees in this role are also eligible for GRAIL's comprehensive and competitive benefits package, offered in accordance with our applicable plans and policies. This package currently includes flexible time-off or vacation; a 401(k) retirement plan with employer match; medical, dental, and vision coverage; and carefully selected mindfulness programs.