Senior Security Engineer (Defensive)

Are you ready to trade your job for a journey? Become a FlyMate! Passion, excitement & global collaboration are all core to what it means to be a FlyMate. At Flywire, we’re on a mission to deliver the world’s most important and complex payments. We use our Flywire Advantage - the combination of our next-gen payments platform, proprietary payment network and vertical specific software, to help our clients get paid, and help their customers pay with ease - no matter where they are in the world. What more do we need to truly be unstoppable? Perhaps, that is you! Who we are: Flywire is a global payments enablement and software company, founded more than a decade ago to solve high-stakes, high-value payments. We’ve scaled into new regions and industry verticals and expanded our product offerings to deliver meaningful value to our clients around the world. Today we support more than 5,100 clients across the global education, healthcare, travel & B2B industries, with diverse payment methods across 240 countries & territories and more than 140 currencies. With over 1,400+ global FlyMates, representing more than 40 nationalities, and in 15 offices world-wide, we’re looking for FlyMates to join the next stage of our journey as we continue to grow. Job Summary As a Senior Security Engineer on the Defensive Platform Builder track you will act as a technical authority for secure software design and cloud native infrastructure defence across Flywire's global footprint. You will bring an automation first mindset to a high velocity fintech environment, partnering with software engineering and SRE squads to embed security controls directly into our public cloud and GitLab CI/CD pipelines using AI workflows, so that our global payment systems stay secure by design and resilient in production. Responsibilities and Tasks:  1. Secure SDLC & CI/CD Automation Ownership Own, design and drive the end to end integration of automated security requirements and validation tooling into high velocity engineering pipelines. Build custom internal tooling, wrappers and automated controls to replace manual security checkpoints, protecting development velocity while removing friction. 2. Cloud & Infrastructure Hardening Partner directly with SRE and DevOps teams to establish secure public cloud architecture blueprints, manage Infrastructure as Code security scanning (for example Terraform) and enforce strict network isolation. Architect and maintain cloud Identity and Access Management controls and enforce Zero Trust boundaries within containerised environments such as Docker and Kubernetes. 3. AI Driven Security & Application Reviews Design, prompt engineer and deploy automated security review workflows using LLM APIs to run real time code analysis and give context aware feedback on pull requests.