Senior Security Engineer I, Application Security

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.

The Opportunity:

At Flywire, security isn’t a checkbox—it’s a foundational pillar of how we build. We are looking for a high-impact Senior Security Engineer I, Application Security to act as a technical visionary, bridging the gap between robust defense and rapid innovation. We expect this role to be able to blend traditional security architecture with new technologies like AI-driven automation.

Key Responsibilities

AI-Driven Security Automation: Design, prompt-engineer, and deploy automated security review workflows, using for example Claude or other LLM APIs to perform real-time code analysis and architectural reviews within our CI/CD environment.
Security Design & Architecture: Lead secure design reviews and advanced threat modeling for our complex payment systems and AI integrated applications.
Engineering Collaboration & Leadership: Act as a technical bridge between Security and Engineering teams. Collaborate frequently with different engineering teams to identify and address security issues.
Advanced Full-Stack Reviews: Oversee deep-dive technical reviews, moving beyond basic scans to perform source code audits and live application testing on high-risk features.
Automation & SDLC: Contribute and take ownership for the automated security controls we are building and take an active part in every aspect of the secure software development lifecycle (S-SDLC).
Mentorship & Guidance: Provide hands-on remediation guidance and mentor junior security or software engineers, also members of Product teams, on both traditional exploits and emerging AI-specific vulnerabilities.

What We Offer:

Competitive compensation

Employee Stock Purchase Plan (ESPP)

Competitive time off

Work with brilliant people globally Learn more about their journeys by checking out #InsideFlywire on social media

Wellbeing Programs (Mental Health, Wellness, Yoga/Pilates/HIIT Classes) with Global FlyMates

Be a meaningful part in our success - every FlyMate makes an impact

Great Talent & Development Programs (Managers Taking Flight – for new or aspiring managers, OneFlywire Career Mobility)

Submit today and get started!

We are excited to get to know you! Throughout our process you can expect to meet with different FlyMates including the Hiring Manager, Peers on the team, the VP of the department, and a skills assessment. Your Talent Acquisition Partner will walk you through the steps and be your “go-to” person for any questions.

Flywire is an equal opportunity employer and follows a policy of administering all employment decisions and personnel actions without regard to race, color, religion, sex, pregnancy, gender identity, national origin, age, ancestry, physical or mental disability, sexual orientation, genetic disposition or carrier status, veteran status, or any other category protected under applicable national, federal, state or local law.