Senior Backend Engineer – Payments Platform

Xe.com; Bracknell; On-site; GBP 90,000 - 125,000; Full time

Benefits offered by this job

Competitive salary

23 days leave

Birthday day off

Pension contribution

Discounted ESPP

Life cover / Income protection

Healthcare

Mental health & wellbeing

Volunteer day

Job summary

Xe.com in Bracknell is hiring a senior back-end engineer who owns real problems end-to-end, from API design and data modelling through service implementation, production reliability, and launch. You will write code that moves money in production and help shape the backend platform as Xe rebuilds its core services.

You will work with product, compliance and operations, own architecture in your domain, mentor engineers, and collaborate with architects and team leads on cross‑domain decisions.

Qualifications

• 6 to 10+ years building production backend services, end-to-end.
• Strong backend proficiency in C# / .NET; other OOP languages welcome.
• SQL and relational database fundamentals.
• Writing and maintaining tests.
• Daily use of agentic coding tools across the SDLC.
• Production experience with AWS, including deployment, CI/CD, and services like SQS, DynamoDB, S3, ECS, Lambda.
• Strong system design and architecture experience; microservices and event-driven patterns.
• Experience in Payments, FX, or regulated industries.
• Track record of technical leadership: mentoring engineers, leading design reviews, and architecture decisions.

Responsibilities

• Design and own backend services that move money and manage multi-currency balances.
• Lead cross-functional delivery with product, compliance, and operations from problem framing through launch.
• Lead the build of partner integrations and settlement infrastructure for your domain.
• Own production health for your domain, including reliability, observability, on-call, and incident response.
• Lead design reviews, set technical direction for your domain, and mentor mid-level engineers.
• Use AI coding tools daily across the SDLC and modernize legacy services with architects.

Skills

C# / .NET

SQL

System design

Microservices

AWS

CI/CD

Testing

AI coding tools

Tools

Copilot

Cursor

Claude Code

Cloud services (SQS, DynamoDB)

Job description

Xe.com in Bracknell is hiring a senior back-end engineer who owns real problems end-to-end, from API design and data modelling through service implementation, production reliability, and launch. You will write code that moves money in production and help shape the backend platform as Xe rebuilds its core services.

You will work with product, compliance and operations, own architecture in your domain, mentor engineers, and collaborate with architects and team leads on cross‑domain decisions.