An overview of this role

As a Staff Engineer on GitLab's Software Composition Analysis team, you'll drive hands-on implementation of security features that help customers understand and manage risks in their software supply chain. Your focus will be on enhancing GitLab's SCA capabilities in dependency scanning and container scanning. You'll work directly on architecture and technical implementation and help the team push forward on three core goals: Gather (introducing data points that help customers understand the urgency of issues, like reachability analysis and supply chain poisoning detection), Integrate (providing other teams with innovative collection techniques for better workflows), and Optimize (solving data correlation at massive scale). You'll contribute hands-on code, help solve novel technical challenges, and establish patterns that improve how the distributed team works together across multiple time zones.

Examples of some future features that you may help build: 
- Dependency scanning for unmanaged C/C++ 
- Dependency Scanning for Yocto environments 
- Vulnerability detection using CPE-based matching against package metadata

What you’ll do

• Implement complex features in dependency scanning and container scanning, shipping improvements that increase scan coverage, improve accuracy, and drive adoption of GitLab's SCA capabilities
• Solve novel technical problems in SCA, establishing reusable patterns that reduce delivery time and improve engineering effectiveness across the team
• Guide architectural and implementation decisions in collaboration with engineering managers, product managers, and peer engineers to improve scalability, reliability, and delivery outcomes across the team's SCA architecture
• Contribute code, design reviews, and technical mentorship that raise quality standards, improve maintainability, and strengthen performance across the codebase
• Collaborate across GitLab's security domain to align SCA work with related efforts in vulnerability management and adjacent product areas, accelerating delivery of shared roadmap goals and improving coordination across related security efforts
• Identify and resolve technical debt, prioritizing changes that improve team velocity, code health, and long-term maintainability across the team's core SCA services
• Translate product needs and customer feedback into technical solutions in partnership with product, UX, and security stakeholders, delivering features that address high-impact customer risks and advance shared roadmap goals

What you’ll bring

• Hands-on experience in Software Composition Analysis and the ability to contribute to complex security features in dependency scanning and container scanning
• Deep hands-on expertise in building and evolving dependency scanning and container scanning analyzers
• Demonstrated ability to design solutions that balance complexity, performance, and maintainability
• Expertise with backend technologies, particularly Go and/or Ruby on Rails, with ability to pick up new technologies quickly
• Familiarity with cloud providers like GCP, CloudFlare, or AWS
• Ability to evaluate technical tradeoffs in SCA and security tooling, with proven success delivering maintainable solutions that help customers manage software supply chain risk
• Ability to work effectively in distributed, async-first teams across multiple time zones
• Experience explaining complex technical and security concepts to engineers and stakeholders

About the team

The Software Composition Analysis team is part of GitLab's Sec Engineering group, and we focus on building capabilities that help customers identify and manage risks in their software supply chain. We work across areas including dependency scanning, container scanning, and license scanning, and we work closely with product, UX, security, and adjacent engineering teams to close important feature gaps in GitLab's platform. Our team members are distributed across regions including Europe and North America, so we rely on clear documentation, asynchronous communication, and thoughtful coordination across time zones. This opportunity is centered on helping us deliver complex security features while balancing hands-on technical progress with strong team execution.

About Buildkite

At Buildkite, our mission is to unblock every developer on the planet. We’ve rethought how software delivery should work and have built a platform that is fast, reliable, secure, and able to scale to the needs of the most demanding high-growth tech companies globally including Uber, Airbnb, Shopify, Canva, PagerDuty, Lyft, and Pinterest.

Our engineering teams work across AU/NZ and US Pacific time zones — a deliberate choice that lets us move fast with real-time collaboration. At the moment, we are prioritising engineers who are based in these regions.

Job Overview

In this role, you’ll help design, build, and scale tools that empower some of the world’s best software engineering teams. You’ll collaborate closely with engineers, designers, and product managers to deliver impactful features and improvements while working on challenges at the intersection of developer experience, scalability, and performance.

This is a highly collaborative, hands-on role where you’ll contribute to product development, influence architectural decisions, and help shape the future of Buildkite’s platform.

🚀 What You’ll Do

• Collaborate with the engineering team to shape upcoming feature or fix
• Work deeply in our Ruby on Rails monolith, including our PostgreSQL databases
• Investigate and resolve issues in our production systems — following a problem from symptom to root cause
• Provide or respond to feedback on GitHub pull requests
• Help customers unblock themselves by diagnosing product behaviour or pipeline issues
• Iterate on schema and data changes, and ensure migrations and deploys remain safe and smooth (we ship code on Fridays!)
• Contribute to architectural discussions and help steer the technical direction of the product

🎨What You Bring

• 5+ years of experience in engineering
• Have deep experience designing, developing, and maintaining complex Ruby on Rails applications in production
• Comfortable working with performance at scale from N+1 queries to indexing strategies to diagnosing slow paths
• Experience using observability tools like Datadog, Honeycomb, etc.
• Care about code quality and know how to balance perfect with practical
• Enjoy solving hard problems with minimal supervision. You can zoom out to see the big picture and zoom in to debug a specific query, API call, or race condition
• Comfortable wearing many hats: helping a customer one moment, pitching an idea to the team the next, digging into the database, or refining product requirements
• Understand good development practices: writing clear commits, thoughtful pull requests, and reliable tests with tools like RSpec

Key Technical Stacks & Components:

• Ruby on Rails
• PostgreSQL
• GraphQL
• React
• Amazon ECS 
• RDS Performance Insights
• Terraform
• Redis
• Golang
• Kafka

✨ Why Join Buildkite

At Buildkite, we value kindness, autonomy, and collaboration. You’ll be part of a remote-first company where your work can make a meaningful impact – empowering engineers worldwide to build and deliver better software faster.

• Competitive compensation and benefits package
• Flexible, remote-first culture 
• Opportunities for professional growth, leadership, and technical ownership
• Work alongside talented, passionate engineers building world-class developer tools
• A collaborative, inclusive, and innovative culture where your ideas make a real impact