Senior Software Engineer II

Work for a global payments leader, consistently ranked one of the best companies to work for 🌍. At Flywire, we’re building and scaling the core platform that powers global money movement — processing hundreds of millions every day for clients across industries. We’re looking for an experienced Senior Software Engineer II — ideally with a background in FinTech — to play a pivotal role in strengthening the very heart of our payments engine. Your work won’t just be about clean code: it will drive end-to-end automation in payment processing (from 0 to 80%), reduce manual effort in FX trading, and deliver clear visibility into significant yearly savings. By automating and optimising processes, you’ll enable our Payments Operations team to focus on higher-value, ROI-driven work — multiplying your impact across the business.

What You’ll Do

• ✍️ Design, build, and maintain clean, secure, testable, and scalable code
• 🐞 Resolve challenging bugs and production issues, ensuring reliability of the global platform
• 🧠 Evaluate complex technical problems, using sound judgement to select the right methods and approaches
• ⚡ Improve performance and scalability of our systems as we expand worldwide
• 🤖 Drive automation initiatives that reduce manual effort and unlock measurable business savings
• 🤝 Collaborate with Product Managers and stakeholders to shape product vision and deliver real business value
• 🌱 Mentor teammates and take initiative in leading technical projects
• 🔎 Support recruitment efforts by helping identify and inspire great engineering talent

• 8+ years of experience in web application development
• Proven track record building scalable, reliable, high-performance distributed systems
• Solid understanding of relational databases and object-oriented fundamentals
• Skilled in test-driven and behaviour-driven development (TDD/BDD)
• Experience with CI/CD pipelines and modern development practices
• Strong collaboration skills and ability to partner effectively with QAs, Product, and SREs
• Excellent communication skills — able to explain complex ideas clearly and persuasively
• Fluent in English (our company’s working language)
• Experience in FinTech or the payments industry (a plus, but not required)
• A passion for delivering high-quality code and a mindset of continuous learning