> Markdown version of [/jobs/ext/2175035-full-stack-software-engineer-senior](https://www.wearedevelopers.com/jobs/ext/2175035-full-stack-software-engineer-senior). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Full Stack Software Engineer (Senior) - **Company:** Xe Xe - **Location:** London, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Java (Programming Language), .NET Framework, Artificial Intelligence, Amazon Web Services, Amazon S3, Automation of Tests, C Sharp (Programming Language), Relational Databases, Cursor (Graphical User Interface Elements), Amazon DynamoDB, Memcached, Systems Development Life Cycle, Redis, Oop Languages, Responsive Web Design, SQL Databases, Web Applications, Web Performance Optimization, Cloud Platform System, Postman, ReactJS, Backend, Documentation System, Vue.js, Kotlin, Atlassian Tools, Front End Software Development, Api Design, Amazon Simple Queue Service (SQS), Golang, Microservices - **Published:** August 22, 2026 - **Apply:** https://www.apply4u.co.uk/jobs/full-stack-software-engineer-senior/44577901 ## About the Role record of technical leadership: mentoring engineers, leading design reviews, and making architecture decisions in your domain. Strong communication and collaboration across engineering, product, and design. Nice-to-have Frontend fundamentals: responsive design, accessibility, web performance, and internationalization. Experience leading front-end or platform modernization and migrations. 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 ## 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 senior full-stack engineer who owns real problems end-to-end and shapes how the team builds, from API design and frontend experience through to backend services, 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, design and modernize the platform across the stack, and lead delivery of customer-facing, Cursor, Claude Code, or equivalent) daily across the SDLC, and lead modernization from legacy services into the modern stack alongside architects and team leads in your domain. What We're Looking For Must-have 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 preferred; other OOP languages welcome (Java, Kotlin, Go, or equivalent). Solid SQL and relational database fundamentals. Writing and maintaining tests as part of how you ship. Daily use of agentic coding tools (Copilot, Cursor, Claude Code, or equivalent) across the SDLC. Production experience on AWS, including hands-on deployment, CI/CD pipelines and modern deployment practices, and native services such as SQS, DynamoDB, S3, ECS, and Lambda. Strong system design and architecture experience, including service-oriented or microservices and event-driven patterns. Payments, FX, or regulated-industry experience. Track ## Related Videos - [Reducing LLM Calls with Vector Search Patterns - Raphael De Lio (Redis)](https://www.wearedevelopers.com/videos/1714-reducing-llm-calls-with-vector-search-patterns-raphael-de-lio-redis) - [Go with the Flow: Stop the Leaks Before Your Memory's a Waterfall!](https://www.wearedevelopers.com/videos/100073-go-with-the-flow-stop-the-leaks-before-your-memory-s-a-waterfall) - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [Navigating the Corporate Jungle: Life as a Developer in a large Company](https://www.wearedevelopers.com/videos/621-navigating-the-corporate-jungle-life-as-a-developer-in-a-large-company) - [Accelerating Authentication Architecture: Taking Passwordless to the Next Level](https://www.wearedevelopers.com/videos/733-accelerating-authentication-architecture-taking-passwordless-to-the-next-level) - [Build and Deploy a Fullstack App with Open Source Tooling](https://www.wearedevelopers.com/videos/775-build-and-deploy-a-fullstack-app-with-open-source-tooling) ## Related Articles - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [How Much Does a Software Engineer Make? Realistic Software Engineering Salaries](https://www.wearedevelopers.com/magazine/425-how-much-does-a-software-engineer-make-realistic-software-engineering-salaries) - [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk) - [The 12 Best Jobs for Software Engineers](https://www.wearedevelopers.com/magazine/401-the-12-best-jobs-for-software-engineers)