Senior Software Engineer II

Flywire; London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A global payments leader in London is seeking a Senior Software Engineer II to enhance the core platform for money movement. This role involves automating payment processes to improve efficiency and reduce manual work. Ideal candidates will have over 8 years of experience in web application development and expertise in scalable systems. The position offers hybrid/remote work and competitive compensation, including stock options and well-being programs.

Benefits

Competitive compensation

Employee Stock Purchase Plan

Wellbeing Programs

Flexible time off

Qualifications

• 8+ years of experience in web application development.
• Proven track record building scalable, reliable systems.
• Strong understanding of relational databases.

Responsibilities

• Design, build, and maintain clean, secure code.
• Resolve bugs and production issues.
• Drive automation initiatives for business savings.

Skills

Web application development

Building scalable systems

Test-driven development

CI/CD pipelines

Collaboration skills

Fluent English

Tools

Java

Spring & Hibernate frameworks

MySQL

JavaScript

HTML5

CSS3

AWS Cloud

Job description

Overview

Company: Flywire
Location: London with Hybrid / Remote Options

Senior Software Engineer II

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

Qualifications

What We’re Looking For

• 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

Technologies We Use

For EDU or Valencia/Core teams, you’ll be working with:

• Java
• Spring & Hibernate frameworks
• MySQL
• JavaScript, HTML5, CSS3
• AWS Cloud

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.

Additional Information

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
• 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.

#LI-Hybrid #LI-Remote