Senior Software Engineer II (FX)

Flywire Corp.; City of London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A global payments technology company in London is seeking a Senior Software Engineer II to enhance their payment processing engine. This role focuses on designing scalable systems and driving automation to improve efficiency. Candidates should have over 8 years of software engineering experience, particularly in FinTech, and be skilled in modern development practices. Remote and hybrid options available.

Benefits

Competitive compensation

Employee Stock Purchase Plan (ESPP)

Wellbeing Programs

Great Talent & Development Programs

Digital Disconnect Days

Qualifications

• 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.

Responsibilities

• Design, build, and maintain clean, secure, testable, and scalable code.
• Resolve challenging bugs and production issues.
• Evaluate complex technical problems using sound judgement.

Skills

Software engineering

Distributed systems

Test-driven development (TDD)

Behavior-driven development (BDD)

Continuous integration/continuous deployment (CI/CD)

Object-oriented design

Collaboration

FinTech experience

Frontend skills (HTMX, React)

AWS

Job description

Overview

Senior Software Engineer II

Location: London with Hybrid / Remote Options too

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

Flywire is a global payments enablement and software company, solving high-stakes, high-value payments in education using modern technology. 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. With over 1000+ FlyMates across more than 40 nationalities in 14 offices worldwide, we’re growing and looking for new teammates to join.

The Opportunity

Work for a global payments leader, consistently ranked as 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 heart of our payments engine.

Your work will go beyond clean code: you 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 optimizing 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 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.

Benefits & Perks

• Competitive compensation, including Restricted Stock Units
• Employee Stock Purchase Plan (ESPP)
• Flying Start - Our immersive Global Induction Program
• Dynamic & Global Team with virtual collaboration across years
• Wellbeing Programs (Mental Health, Wellness) with Global FlyMates
• Be a meaningful part of our success — every FlyMate makes an impact
• Competitive time off, including FlyBetter Days to volunteer
• Digital Disconnect Days
• Great Talent & Development Programs

Submit today and get started! Throughout our process you can expect to meet with a range of FlyMates including the Hiring Manager, team peers, and leadership. Your Talent Acquisition Partner will guide you through the steps and be your point of contact for questions.

Flywire is an equal opportunity employer. With over 30 nationalities across 12 offices, diversity and inclusion are at the core of our people agenda, and we’re excited to watch our unique culture evolve with each new hire. #LI-Remote

Flywire is an equal opportunity employer.