Senior Full-Stack Engineer — Payments Platform

Xe; Bracknell; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Competitive Salary & Discretionary Bon

23 days annual leave, 28 max

Birthday day off

4% employer pension

Healthcare

ESPP discount

Life, Income Protection & Critical Ill

Wellbeing programs

Volunteering day

Job summary

Xe is rebuilding its cross-border payments platform in Bracknell. We seek a senior full-stack engineer who owns problems from API design to frontend and backend services, shaping the platform and driving customer-facing features.

You will mentor engineers, collaborate with product and design, and push modernization across the stack while leveraging AI-assisted tools to ship reliable software.

Qualifications

• 6 to 10+ years building production web applications end-to-end.
• Strong frontend proficiency with Vue.js, React, or equivalent.
• Strong backend proficiency in C# / .NET; other OOP languages welcome.
• Solid SQL and relational database fundamentals.
• Writing and maintaining tests as part of how you ship.
• Daily use of agentic coding tools across the SDLC.
• Production experience on AWS, including CI/CD and native services.
• Strong system design and architecture experience, including microservices and event-driven patterns.
• Payments, FX, or regulated-industry experience.
• Track record of technical leadership and mentoring engineers.
• Strong communication and collaboration across teams.

Responsibilities

• Design and own features across the stack that move money and manage multi-currency balances across onboarding, KYC/KYB, payment initiation, FX, settlement, and related services.
• Lead delivery of customer-facing features from UI to backend services.
• Own production health for your domain including reliability, observability, on-call, and incident response.
• Lead cross-functional delivery with product, design, and compliance from problem framing through launch.
• Lead design reviews, set technical direction, and mentor mid-level engineers.
• Use agentic coding tools daily across the SDLC and modernize legacy services with architects.

Skills

6–10+ years experience

Frontend: Vue.js/React

Backend: C# / .NET

SQL relational databases

Testing / TDD

Agentic coding tools (AI)

AWS & CI/CD

System design / microservices

Payments / FX domain knowledge

Technical leadership

Communication & collaboration

Tools

AWS (SQS, DynamoDB, S3, ECS, Lambda)

Job description

Xe is rebuilding its cross-border payments platform in Bracknell. We seek a senior full-stack engineer who owns problems from API design to frontend and backend services, shaping the platform and driving customer-facing features.

You will mentor engineers, collaborate with product and design, and push modernization across the stack while leveraging AI-assisted tools to ship reliable software.