Software Engineer II, Payment Platform

Flywire; Valencia; On-site; EUR 55,000 - 75,000; Full time

Benefits offered by this job

Competitive compensation

ESPP (Employee Stock Purchase Plan)

Generous time off

Wellbeing programs

Job summary

Flywire seeks a Software Engineer II to design, build, and scale the platform behind our high-value payments engine. You will own features, improve performance, and ensure secure, cost-efficient operations in a collaborative, global team.

You’ll work with a modern stack (Java, Ruby, React) across Linux, MySQL/MongoDB, Redis, and AWS, contributing to a payment platform serving thousands of clients and millions of transactions daily.

Qualifications

• 4+ years in application development with hands-on delivery.
• Experience building scalable, distributed systems and services.
• Strong REST-based API design and implementation experience.
• Cloud platforms (AWS, Azure, etc.) exposure.
• Observability tools and practices knowledge.
• Relational databases proficiency.
• Solid object-oriented design fundamentals.
• Experience collaborating with QA, Product, and SRE teams.
• Fluent in English for global collaboration.
• FinTech or payments industry experience is a plus.

Responsibilities

• Build, maintain, and optimise scalable and secure services.
• Write clean, testable, maintainable, and extensible code.
• Solve complex technical challenges and production issues.
• Evaluate data and scenarios to make sound design and technical decisions.
• Improve scalability, performance, and reliability across systems.
• Contribute to product vision by collaborating with Product Managers, Designers, and Engineers globally.
• Mentor and support other developers to grow their skills.

Skills

4+ years experience

REST

Distributed systems

Cloud platforms

Observability

Relational databases

OO design

Cross-functional teamwork

English fluent

FinTech/payments experience

Tools

Java

Ruby

React

JavaScript

HTML5

CSS3

MySQL

MongoDB

Redis

ElasticSearch

Linux

AMQP

GitLab

AWS

Job 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 more than a decade ago to solve high-stakes, high-value payments. We’ve scaled into new regions and industry verticals and expanded our product offerings to deliver meaningful value to our clients around the world.

Today we support more than 5,100 clients across the global education, healthcare, travel & B2B industries, with diverse payment methods across 240 countries & territories and more than 140 currencies.

With over 1,400+ global FlyMates, representing more than 40 nationalities, and in 15 offices world-wide, we’re looking for FlyMates to join the next stage of our journey as we continue to grow.

The Opportunity:

We’re seeking a Software Engineer II to help build and scale the platform that powers our industry-leading payment engine — moving hundreds of millions daily. You’ll design new features, improve existing functionality, and ensure our systems deliver speed, cost efficiency, and scalability.

This role is perfect for someone who thrives on collaborative problem-solving, writing clean and secure code, and taking full ownership of product quality within a cross-functional team.

What you’ll do:

• Build, maintain, and optimise scalable and secure services.
• Write clean, testable, maintainable, and extendable code.
• Solve complex technical challenges and production issues.
• Evaluate data and scenarios to make sound design and technical decisions.
• Improve scalability, performance, and reliability across our systems.
• Contribute to product vision, collaborating with Product Managers, Designers, and Engineers globally.
• Mentor and support fellow developers to grow their skills.

Qualifications & What we’re looking for:

• 4+ years’ experience in application development.
• Strong expertise in web services and REST architecture.
• Proven experience building scalable, distributed systems.
• Product-oriented mindset with focus on business impact.
• Hands-on experience with cloud platforms (AWS, Azure, etc.).
• Understanding of observability (o11y) tools and principles.
• Knowledge of relational databases.
• Strong fundamentals in object-oriented design.
• Experience collaborating in cross-functional teams (QA, Product, SRE).
• Fluent in English.
• FinTech or payments industry experience is a plus.

Tech stack you’ll work with

• Backend: Java, Ruby
• Frontend: React, JavaScript, HTML5, CSS3
• Databases & systems: Linux, MySQL, MongoDB, Redis, Sidekiq, AMQP, ElasticSearch
• Cloud: AWS
• Version control & CI/CD: GitLab

What We Offer:

• Competitive compensation
• Employee Stock Purchase Plan (ESPP)
• Competitive time off
• Work with brilliant people globally Learn more about their journeys by checking out #InsideFlywire on social media
• Wellbeing Programs (Mental Health, Wellness, Yoga/Pilates/HIIT Classes) with Global FlyMates
• Be a meaningful part in our success - every FlyMate makes an impact
• Great Talent & Development Programs (Managers Taking Flight – for new or aspiring managers, OneFlywire Career Mobility)

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 and follows a policy of administering all employment decisions and personnel actions without regard to race, color, religion, sex, pregnancy, gender identity, national origin, age, ancestry, physical or mental disability, sexual orientation, genetic disposition or carrier status, veteran status, or any other category protected under applicable national, federal, state or local law.