Senior Backend Software Engineer II, Payments Platform (FX)

Flywire; Greater London; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A global payments leader is seeking a Senior Backend Software Engineer II to join their team in London. This role plays a pivotal part in supporting a platform that processes global money movement. The ideal candidate will have 8 years of experience in software engineering and a strong background in building reliable distributed systems. With remote options available, you'll work in a diverse environment and be part of a team that values innovation and collaboration.

Benefits

Competitive compensation including Restricted Stock Units

Employee Stock Purchase Plan (ESPP)

Global Induction Program

Wellbeing Programs

Volunteer 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 ensuring reliability of the global platform.
• Collaborate with Product Managers and stakeholders to shape product vision.

Skills

Ruby

Java

React

Distributed Systems

Object-oriented design

TDD

BDD

CI/CD practices

Tools

AWS

MySQL

Postgres

Redis

AMQP

OpenSearch

Job description

Senior Backend Software Engineer II Payments Platform (FX)

Location: London with Hybrid / Remote Options too

The Opportunity

Work for a global payments leader consistently ranked one of the best companies to work for.

At Flywire we are 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

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.
• 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.

Technologies We Use

• Backend: Ruby, Java
• Frontend: HTMX, React
• Databases & systems: Linux, MySQL, Postgres, Redis, AMQP, OpenSearch
• 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.

Flywire is an equal opportunity employer.

Remote Work: Yes

Employment Type: Full-time

Key Skills

Spring,.NET,C / C++,Go,React,OOP,C#,AWS,Data Structures,Software Development,Java,Distributed Systems

Experience: years

Vacancy: 1