Senior Software Engineer III, Payments Platform

Company Description

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

Passion, excitement & global collaboration are all core to what it means to be a FlyMate. At Flywire, we’re on a mission to deliver the world’s most important and complex payments. We use our Flywire Advantage - the combination of our next-gen payments platform, proprietary payment network and vertical specific software, to help our clients get paid, and help their customers pay with ease - no matter where they are in the world.

What more do we need to truly be unstoppable? Perhaps, that is you!

Who we are:
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’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. And, we’re just getting started!

With over 1000+ global FlyMates, representing more than 40 nationalities, and in 14 offices world-wide, we’re looking for FlyMates to join the next stage of our journey as we continue to grow.

Job Description

Senior Software Engineer III, Payments Platform

Location: Valencia hybrid but will consider Spain remote for the right calibre of candidate

The Opportunity:

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

At Flywire, we’re on a mission to simplify and modernize payments for businesses and institutions worldwide. Every day, our platform moves hundreds of millions of dollars, and we’re looking for a Senior Software Engineer III to help us scale faster, smarter, and more securely.

If you enjoy solving complex problems, building reliable systems at scale, and mentoring peers, you’ll thrive here. Success is more than writing great code: it’s about making a real impact across our products, teams, and global clients.

What You’ll Do:

• Build clean, secure, high-quality, testable, and maintainable code that powers global payments

• Resolve complex production issues and ensure system reliability and stability

• Analyze challenging problems and design pragmatic, scalable solutions

• Lead improvements across performance, scalability, and developer experience

• Collaborate with Product Managers, QAs, SREs, and stakeholders to shape product vision

• Mentor teammates and drive technical initiatives

• Support recruitment by attracting and inspiring engineering talent

• Influence all stages of the development lifecycle, from design to production

Qualifications

What We’re Looking For:

• 8+ years of experience in web application development

• Expertise in building scalable, high-performance distributed systems

• Strong foundations in OOP and relational databases

• Skilled in TDD/BDD and modern CI/CD practices

• Experience collaborating in cross-functional teams

• Excellent communication skills, fluent in English

• Background in FinTech or payments is a plus, but not required

• Passion for delivering high-quality code and continuous learning

Technologies You’ll Use:

• Ruby (Sinatra, Sequel, ActiveRecord) 💎

• Modern Java ☕

• MySQL, Postgres, Redis, Kinesis 🗄️

• Claude Code, Cursor, Copilot, Bedrock 🤖

• React, HTMX, Tailwind 💻

• AWS ECS microservices ☁️

• Domain Driven Design 🏗️

Why You’ll Love Working Here:

• Make a direct impact on global payments that affect millions of people

• Work in a collaborative, supportive team that values innovation and learning

• Enjoy flexible work arrangements and opportunities for career growth

• Be part of a mission-driven company recognized as one of the best places to work

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 br