Sr Back-End Engineer

Xe.com; Bracknell; On-site; GBP 60,000 - 90,000; Full time

Benefits offered by this job

Competitive Salary & Discretionary Bon

23 days annual leave increasing with 2

Birthday day off

4% employer pension contribution

Discounted Euronet ESPP

Life Cover, Income Protection & CI

Healthcare

Mental Health and Wellbeing

Volunteering day

Job summary

Xe is building a modern backend for cross-border payments, enabling onboarding, KYC/KYB, payments initiation and settlement. You will own end-to-end production work in a small team, shipping features and improving reliability with a strong emphasis on platform modernization and AI-assisted development.

You will work across design, implementation, and operations, contributing to highly available services that move money and handle multi-currency balances in production environments.

Qualifications

• 3 to 6 years building production backend services.
• Strong backend proficiency in C# / .NET.
• SQL and relational database fundamentals.
• Writing and maintaining tests.
• Daily use of agentic coding tools (Copilot, Cursor, Claude Code, or equivalent) across the SDLC.
• Production experience with AWS, including hands-on deployment and native services such as SQS, DynamoDB, S3, ECS, and Lambda.
• Strong system design fundamentals, including distributed systems and async or event-driven patterns.
• Strong written and verbal communication.

Responsibilities

• Build backend services that move money and manage multi-currency balances across onboarding, KYC/KYB, payment initiation, FX, settlement, and related services.
• Partner with product, compliance, and operations from problem framing through launch.
• Build and operate partner integrations and settlement infrastructure your services depend on.
• Own your services in production, including reliability, observability, on-call, and incident response.
• Use agentic coding tools daily across the SDLC to modernize parts of the platform in collaboration with architects.

Skills

C# / .NET

SQL

Testing

AWS

Distributed systems

AI coding tools

Tools

Copilot

Cursor

Claude Code

Postman

Jira

Confluence

AWS SQS

DynamoDB

S3

ECS

Lambda

Memcached

Redis

Job description

Description

About Xe
Xe is a cross-border payments platform. We help SMEs and consumers in the US, UK, Canada, Australia, and New Zealand collect, convert, hold, and send money across markets. Each year, over 300 million people use Xe for currency information and over 350,000 use us to send money overseas.
Today, we're rebuilding the platform layer behind cross-border payments for corporate and consumer clients. We're small enough that your code ships fast and your decisions matter, and Euronet Worldwide (Nasdaq: EEFT) backs us so the problems stay real-scale.

About This Role

We're hiring a mid-level back-end engineer who likes owning real problems end-to-end, from API design and data modeling through to service implementation, production reliability, and launch. You already use AI as part of how you think, build, test, and ship.
You’ll write code that moves money in production, build and modernize the backend services the platform runs on, and ship new capability as Xe rebuilds its platform layer. You’ll work in a small team with direct access to product, compliance, and operations, own your services in production, and partner with architects and team leads on bigger design decisions.
What You’ll Do

• Build backend services that move money and manage multi-currency balances across a range of domains, including onboarding, KYC and KYB, payment initiation, FX, settlement, and other supporting services.
• Partner with product, compliance, and operations from problem framing through launch.
• Build and operate the partner integrations and settlement infrastructure your services depend on.
• Own your services in production, including reliability, observability, on-call, and incident response.
• Use agentic coding tools (Copilot, Cursor, Claude Code, or equivalent) daily across the SDLC, and help take parts of the platform from legacy services into the modern stack alongside architects and team leads in your domain.
  

What We’re Looking For

Must-have

• 3 to 6 years building production backend services, end-to-end.
• Strong backend proficiency in C# / .NET preferred; other OOP languages welcome (Java, Kotlin, Go, or equivalent).
• SQL and relational database fundamentals.
• Writing and maintaining tests.
• Daily use of agentic coding tools (Copilot, Cursor, Claude Code, or equivalent) across the SDLC.
• Production experience with AWS, including hands-on deployment and native services such as SQS, DynamoDB, S3, ECS, and Lambda.
• Strong system design fundamentals, including distributed systems and async or event-driven patterns.
• Strong written and verbal communication.
  

Nice-to-have

• Experience in payments, FX, or cross-border money movement.
• Service-oriented or microservices architecture experience.
• Experience with ledgers, double-entry accounting, or other financial-data systems.
• Experience with CI/CD pipelines and modern deployment practices.
• Experience with caching solutions like Memcached or Redis.
• Experience using project management and documentation tools like Jira and Confluence.
• Knowledge of API testing tools such as Postman or Bruno.
• Writing automated tests alongside development with AI tools (Claude Code or equivalent).
  

Perks & Benefits

• Competitive Salary & Discretionary Bonus
• 23 days annual leave increasing with service (capped at 28 days)
• Paid day off for your Birthday
• 4% employer pension contribution
• Discounted Euronet ESPP
• Life Cover, Income Protection & Critical Illness cover
• Healthcare
• Plumm Mental Health and Wellbeing
• Volunteering day for a charity of your choice

We want Xe to be a great place to work and to ensure that our communities are represented across our workforce. A vital part of this is ensuring we are a truly inclusive organization that encourages diversity in all respects.
Xe is an Equal Employment Opportunity employer. All qualified applicants will be considered for employment regardless of age, national origin, race, color, disability, religion, sexual orientation, gender identity or expression, or any other characteristic protected under applicable law. We are committed to providing reasonable accommodations to qualified individuals with disabilities. If you need assistance or an accommodation due to a disability, you may contact us at [e-mail].
The position responsibilities outlined above are intended to define the general contents and requirements to perform this job. It is not to be taken as a complete statement of responsibilities or requirements. This job description does not restrict the Company's right to assign or reassign duties and responsibilities to this job as needed.