Cloudathlete is building the operating system for sport: a modular, multi-sport platform powering governing bodies, clubs, competitions, learning, comms and more. We’re expanding our engineering team and looking for a Junior Developer who wants to grow fast, ship real features, and help build products used by athletes, officials, volunteers and NGBs worldwide.
What you’ll work with
Our stack is modern, lively, and used across real federations every single day:
* Backend: .NET 8, C#, Entity Framework, Web APIs
* Frontend: TypeScript, React, Next.js
* Mobile/App: React Native (bonus points if you’ve shipped something)
* Database: MS SQL Server + Azure SQL + PostgreSQL
* Cloud: Azure, Docker, CI/CD pipelines
* Supporting tech: Stripe, PowerBI, Mailchimp, QuickPay, a growing library of external APIs, and our own CloudIQ AI layer, utilising OpenAI and Vercel AI SDK
You don’t need to know all of this yet, but you should be confident in at least one part of the stack and hungry to expand.
What you’ll do
This is a hands-on junior role where you’ll shape real features and learn fast.
You’ll:
* Build and refine platform modules, UIs, and APIs
* Develop app features across web and mobile
* Participate in code reviews and sprint planning
* Help diagnose weird-and-wonderful bugs
* Write and execute tests (unit, integration, and functional) to keep releases smooth
* Work with senior devs to improve QA processes and automated testing
* Ship production code early and often
* Help bring Cloudathlete’s next-generation features (AI, rankings, analytics, dynamic forms) to life
What we’re looking for
* 6–18 months of development experience (flexible depending on portfolio)
* Experience with .NET or TypeScript/React
* Ideally some experience with mobile/app development (React Native or similar)
* An interest in writing clean, testable code
* A proactive approach to testing and quality, not just “happy path” checking
* Curiosity, a tidy coding style, and a willingness to learn quickly
* Passion for sport or fitness is a bonus, not a requirement
* Interest or preferably experience using AI agents to enhance development
What we offer
* Competitive salary for a junior role
* Hybrid working (Sheffield HQ)
* Real ownership of features
* A chance to help build one of the UK’s fastest-growing sports platforms from the inside
* A supportive team that believes juniors grow fastest by doing, not watching