StaffSecurityEngineer

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 Airbnb, Shopify, Canva, PagerDuty, Lyft, and Pinterest. Job Overview We’re looking for a Staff Security Engineer to help shape and scale security across Buildkite’s platform, infrastructure, and developer workflows. This is a hands-on technical leadership role. You’ll drive security architecture, influence engineering standards, and help embed secure-by-default thinking into how we build and ship software. You’ll operate across Application Security, Adversarial Security, and Cloud & Platform Security - setting technical direction while remaining close to implementation. Staff Engineers at Buildkite are force multipliers. In this role, you’ll raise the security bar across the organisation, partner deeply with Engineering and Product leaders, and design security systems that scale with our growth. 🔧 About the Security Team The Security team at Buildkite designs secure-by-default infrastructure, developer workflows, and data protection systems. We work closely with Engineering, Platform, and Product to reduce risk without slowing delivery. As a small, high-impact team in a fast-growing company, we focus on: Embedding security into the SDLC and CI/CD workflows Proactively identifying and validating risks through adversarial testing Designing cloud and infrastructure controls that scale Building guardrails and automation that make the secure path the easiest path Ensuring that AI is a key part of our evolution This role will help define the next stage of maturity for security at Buildkite. 🚀 What You’ll Do Build and Improve Security Across the Platform Lead threat modeling and architectural security reviews for all parts of the organisation Conduct Adversary Simulations and Penetr