Principal Engineer, Software Supply Chain Security in London

GitLab is an open-core software company that develops the most comprehensive AI-powered DevSecOps Platform, used by more than 100,000 organizations. Our mission is to enable everyone to contribute to and co‐create the software that powers our world. When everyone can contribute, consumers become contributors, significantly accelerating human progress. Our platform unites teams and organizations, breaking down barriers and redefining what's possible in software development.

As the Principal Engineer, Software Supply Chain Security, you'll own the technical strategy that secures how software is built and delivered on GitLab's DevSecOps platform. You'll provide architectural leadership across multiple engineering teams. You'll also partner closely with infrastructure and CI/CD teams to harden our pipelines, infrastructure, and access layers. Your work will shape GitLab's enterprise security posture in the rapidly growing software supply chain security market. You'll focus on SLSA Level 3 compliance, secrets management, CI/CD security hardening, and the foundations of GitLab's global zero‐trust architecture. You'll mentor Staff Engineers and individual contributors, guide critical technical decisions, and also act as a spokesperson with customers and external stakeholders for GitLab's secure, mission‐critical SaaS that runs millions of pipelines.

Some Examples Of Our Projects

• SLSA Level 3 compliance and provenance attestation across GitLab's CI/CD platform
• Integrated secrets management and runner security for container‐isolated, secure pipelines

What you'll do

• Lead the end‐to‐end software supply chain security architecture for GitLab's CI/CD platform, including SLSA Level 3 implementation and CI infrastructure hardening.
• Drive cross‐team technical strategy and decisions across our Software Supply Chain Security (SSCS) stage teams, aligning engineering work to SSCS strategic plans.
• Collaborate with infrastructure and CI/CD teams to design and land long‐term initiatives for secure, scalable runner architecture, container isolation, and pipeline security at scale.
• Propose and validate technical implementations that support architectural changes to improve CI/CD scaling and performance on critical paths.
• Teach, mentor, and coach Staff Engineers and individual contributors, raising the bar on supply chain threat modeling, secrets management, artifact signing, and SBOM lifecycle practices.
• Partner with Engineering Managers and senior leadership to define roadmaps, break down complex initiatives, and enable Staff Engineers to lead sub‐department‐wide efforts.
• Engage with customers and external stakeholders as a technical consultant and spokesperson for GitLab's software supply chain security capabilities and roadmap.
• Collaborate with product, security, and compliance stakeholders to ensure features meet enterprise security, governance, and regulatory expectations in the software supply chain security market.

What you'll bring

• Deep expertise in software supply chain security, including threat modeling for supply chain attack vectors, SLSA implementation and attestation systems, and SBOM generation and lifecycle management.
• Strong knowledge of artifact signing and verification using the Sigstore ecosystem, including Cosign, Fulcio, Rekor, and in‐toto attestations.
• Experience designing and hardening CI/CD security, such as runner isolation, pipeline security controls, and secrets management in large‐scale environments.
• Background in distributed systems and infrastructure, including building resilient CI/CD platforms that process high pipeline volumes and optimizing performance for critical paths.
• Practical experience with container security and Kubernetes security, including admission controllers, policy controllers, workload isolation, and registry hardening.
• Proficiency in Go or Rust in a production environment, combined with expert‐level understanding of CI/CD workflows and DevSecOps best practices.
• Experience operating as a Principal or Staff Engineer across multiple development teams, providing architectural leadership and partnering with Engineering Managers and senior leaders.
• Demonstrated capacity to clearly communicate complex problems and solutions.

About The Team

Our Software Supply Chain Security stage engineering teams are responsible for authentication and access within GitLab. We also build features that help customers manage vulnerabilities, dependencies, security policies, and compliance frameworks across their organizations. Our group includes four core teams (Authentication, Authorization, Pipeline Security, and Compliance) and more than 40 engineers. We work asynchronously across regions and partner closely with product, security, and infrastructure to deliver secure‐by‐default features for customers in highly regulated industries.

How GitLab Will Support You

• Benefits to support your health, finances, and well‐being
• Flexible Paid Time Off
• Team Member Resource Groups
• Equity Compensation & Employee Stock Purchase Plan
• Growth and Development Fund
• Parental leave
• Home office support

Please note that we welcome interest from candidates with varying levels of experience; many successful candidates do not meet every single requirement. Additionally, studies have shown that people from underrepresented groups are less likely to apply to a job unless they meet every single qualification. If you're excited about this role, please apply and allow our recruiters to assess your application.

GitLab is proud to be an equal‐opportunity workplace and is an affirmative action employer. GitLab's policies and practices relating to recruitment, employment, career development and advancement, promotion, and retirement are based solely on merit, regardless of race, colour, religion, ancestry, sex (including pregnancy, lactation, sexual orientation, gender identity or gender expression), national origin, age, citizenship, marital status, mental or physical disability, genetic information (including family medical history), discharging status from the military, protected veteran status (which includes disabled veterans, recently separated veterans, active duty wartime or campaign badge veterans and Armed Forces service medal veterans), or any other basis protected by law. GitLab will not tolerate discrimination or harassment based on any of these characteristics.