Senior Software Engineer II, Payments Platform (Treasury & FX)

Flywire; City Of London; On-site; GBP 70,000 - 90,000; Full time

Benefits offered by this job

Competitive compensation, including Restricted Stock Units

Employee Stock Purchase Plan (ESPP)

Wellbeing Programs (Mental Health, Wellness)

Competitive time off, including volunteer days

Job summary

A global payments technology company based in London is looking for a Senior Software Engineer II to enhance their core payments platform. The role involves optimizing payment processing and designing scalable code while collaborating with cross-functional teams. Ideal candidates have 8+ years in software engineering and strong skills in automation. A commitment to high-quality output and a passion for learning is essential. Join a diverse team committed to innovation.

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.
• Strong fundamentals in object-oriented design.

Responsibilities

• Collaborate with Product Managers to shape product vision.
• Drive automation and optimization initiatives.
• Evaluate complex technical problems.
• Design, build, and maintain clean, secure, testable code.
• Improve performance and scalability of systems.
• Resolve challenging bugs and production issues.
• Mentor teammates and lead technical projects.
• Support recruitment efforts for engineering talent.

Skills

Professional software engineering

Collaborative skills across functions

TDD

BDD

CI/CD practices

Object-oriented design

Problem-solving

Continuous learning

Tools

Ruby

Java

Docker

AWS

MySQL

Postgres

Linux

Redis

AMQP

OpenSearch

Job description

Senior Software Engineer II, Payments Platform (Treasury & FX)

Flywire is a global payments enablement and software company, founded a decade ago to solve high‑stakes, high‑value payments in education, using modern technology. Today we digitize payments for over 3,300+ global clients across education, healthcare, travel & B2B, covering more than 240 countries and territories and supporting over 140 currencies. With 1,000+ global FlyMates from 40+ nationalities and 14 offices worldwide, we are looking for talented engineers to join the next stage of our journey.

As a Senior Software Engineer II, you will work on the core platform that powers global money movement, processing hundreds of millions of dollars every day for clients across industries. Your work will drive end‑to‑end optimization and automation in payment processing, reduce manual effort in treasury management and FX trading, and deliver significant business impact.

What You’ll Do

• 🤝 Collaborate with Product Managers and stakeholders to shape product vision and deliver real business value
• 🤖 Drive automation and optimization initiatives that reduce manual effort and unlock measurable business impact
• 🧠 Evaluate complex technical problems, using sound judgement to select the right methods and approaches
• ✍️ Design, build, and maintain clean, secure, testable, and scalable code
• ⚡ Improve performance and scalability of our systems as we expand worldwide
• 🐞 Resolve challenging bugs and production issues, ensuring reliability of the global platform
• 🌱 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
• Databases & Systems: Docker, Linux, MySQL, Postgres, Redis, AMQP, OpenSearch
• Cloud: AWS

We value smart people who are quick learners. You do not need to have used every technology listed above.

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.