Security Engineer II

Are you ready to trade your job for a journey? Become a Fly Mate!

Passion, excitement & global collaboration are all core to what it means to be a Fly Mate. 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 a decade ago to solve high-stakes, high-value payments in education, using modern technology.

Today, we’ve digitized payments for more than 3,300+ global clients across education, healthcare, travel & B2B, covering more than 240 countries and territories and supporting over 140 currencies. And, we’re just getting started!

With over 1000+ global Fly Mates, representing more than 40 nationalities, and in 14 offices world-wide, we’re looking for Fly Mates to join the next stage of our journey as we continue to grow.

🚀 The Opportunity

Flywire is seeking an eager and skillful Application Security Engineer to join our elite Security Team. You will support our security efforts across our global development houses, ensuring the privacy and safety of our most confidential business and personal information.

At Flywire, we don’t just "check for bugs"—we build security into the heart of our products. If you have a "breaker" mentality and a passion for secure architecture, this journey is for you!

Your mission is to ensure security is never an afterthought. You will be an active player in every aspect of the development lifecycle:

1. Security by Design & Architecture

Define the Standard: Draft comprehensive security requirements for every new system, service, or integration needed by Flywire.

Lead the Blueprint: Own the threat modeling and secure architecture initiatives to prevent vulnerabilities at the design stage.

Technical Leadership: Perform lead tasks, providing guidance to other team members and setting technical standards.

2. Engineering Partnership & Collaboration

Embed with Teams: Attend engineering syncs and collaborate frequently with different squads to identify and address security issues in real-time.

Full-Stack Reviews: Perform deep-dive security reviews, from meticulous source code auditing to dynamic testing of live applications.

Review & Integrate: Execute technical tasks on change and integration reviews to ensure "security-first" deployments.

3. S-SDLC Mastery

End-to-End Ownership: Be an active part of the secure software development lifecycle (S-SDLC).

Hands-on Remediation: Don’t just find flaws—provide expert guidance to developers on how to mitigate and fix them effectively.

🧠 Here’s What We’re Looking For

The Experience

4+ years in Application Security (App Sec).

Proven experience performing web application penetration tests and vulnerability research.

Strong skills in source code auditing and development of custom security tools.

The Tech Stack & Knowledge

The "Breaker" Mindset: Ability to think like an attacker to identify flaws while effectively crafting mitigating controls.

Modern Standards: Deep understanding of OWASP Top 10 and the OWASP Top 10 for LLM Applications (AI-driven security).

Authentication:

Working experience with OAuth, SAML, and SSO
.

Dev Sec Ops :

Experience with
SAST/DAST/SCA tools and integrating them into CI/CD pipelines.

Compliance: Knowledge of security audit certifications such as PCI-DSS, SOC 1, and SOC 2.

Soft Skills

Master Communicator: Ability to explain complex technical findings to both technical and non-technical audiences with empathy and clarity.

What We Offer:

• Competitive compensation, including Restricted Stock Units
• Employee Stock Purchase Plan (ESPP)
• Flying Start - Our immersive Global Induction Program
• Work with brilliant people that will keep you on your toes, learn more about their journeys by checking out #Inside Flywire on social media
• Dynamic & Global Team (we have been…