Senior Software Engineer II, Payments Platform (FX)

Flywire; City Of London; Hybrid; GBP 70,000 - 95,000; Full time

Job summary

A leading global payments company in the UK is seeking an experienced Senior Software Engineer II to help scale their payments platform. You will design and maintain clean, testable code while driving automation initiatives. The ideal candidate has over 8 years of software engineering experience and a strong background in FinTech. This role offers competitive compensation along with various employee benefits.

Benefits

Competitive compensation, including Restricted Stock Units

Employee Stock Purchase Plan (ESPP)

Immersive Global Induction Program

Wellbeing Programs with Global FlyMates

Competitive time off including FlyBetter Days

Qualifications

• 8+ years of experience in professional software engineering.
• Strong background in TDD, BDD, and CI/CD practices.
• FinTech or payments industry experience is a major plus.

Responsibilities

• Design, build, and maintain clean, secure, testable, and scalable code.
• Resolve challenging bugs and production issues.
• Drive automation initiatives that reduce manual effort.

Skills

8+ years of experience in professional software engineering

Proven experience with scalable, performant, and reliable distributed systems

Strong background in TDD, BDD, CI/CD practices

Understanding of relational databases

Strong fundamentals in object-oriented design

Excellent collaboration skills across functions

A passion for delivering high-quality code

Frontend: HTMX, React

Cloud: AWS

Job description

Senior Software Engineer II, Payments Platform (FX)

The Opportunity

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

What We’re Looking For

• 8+ years of experience in professional software engineering.
• Proven experience with scalable, performant, and reliable distributed systems.
• Strong background in TDD, BDD, CI/CD practices.
• Understanding of relational databases.
• Strong fundamentals in object-oriented design.
• Excellent collaboration skills across functions (QA, Product, SRE, Stakeholders).
• A passion for delivering high-quality code and a mindset of continuous learning.
• FinTech or payments industry experience is a major plus.
• Frontend: HTMX, React
• Cloud: AWS

Why Join Us

At Flywire, you’ll have the freedom to innovate, the scale to make a global impact, and the support of a culture that values collaboration, curiosity, and excellence. Every line of code you write helps power the movement of money across borders — making payments faster, smarter, and more efficient worldwide.

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 #InsideFlywire on social media
• Dynamic & Global Team (we have been collaborating virtually for years!)
• Wellbeing Programs (Mental Health, Wellness) with Global FlyMates
• Be a meaningful part in our success - every FlyMate makes an impact
• Competitive time off including FlyBetter Days to volunteer in a cause you believe in and
• Digital Disconnect Days!
• Great Talent & Development Programs

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. With over 30 nationalities across 12 different offices, and diversity and inclusion at the core of our people agenda, we believe our FlyMates are our greatest asset, and we’re excited to watch our unique culture evolve with each new hire. #LI-Remote

Flywire is an equal opportunity employer.