B2B

Front-end

We’re looking for a Full-stack Developer (React + .NET) to join an innovative R&D team in Warsaw.You’ll be part of a fast-growing sport-tech company that’s using AI to help leading global sports brands create and deliver real-time video content. If you’re interested in building high-performance tools that reach millions of users, this could be a great opportunity for you.

Responsibilities

Build and maintain a high-performance, browser-based video editing platform used by global media teams
Develop client-side features using React + TypeScript and server-side logic using C# / .NET Core
Design and implement modular, reusable components for timeline management, video preview, trimming tools, overlay controls, and more
Develop and maintain scalable backend APIs for video rendering, encoding, and delivery
Collaborate closely with Product, Design, QA, and Engineering teams in daily standups, planning sessions, and code reviews
Ensure robust testing, clean documentation, and smooth CI/CD pipelines to support reliable deployments
Monitor system behavior in production, identify issues across the stack, and deliver timely fixes
Share knowledge with peers, contribute to internal engineering initiatives, and stay up to date with industry trends in video tech

Requirements

4+ years of hands-on experience building production-grade web applications (Full-stack)
Strong knowledge of React, TypeScript, JavaScript, modern HTML/CSS
Solid experience with C#, .NET Core, asynchronous programming, and RESTful API design
Familiarity with SQL and basic knowledge of NoSQL tools like Redis
Practical understanding of cloud infrastructure (preferably Azure) and CI/CD tools like GitHub Actions or Azure DevOps
Ability to debug complex systems and write maintainable, testable code
Strong communication skills and comfort working with cross-functional teams
Self-motivated with a focus on delivering great user experiences

Will be a plus

Experience working with multimedia/video frameworks or streaming protocols (HLS, MPEG-DASH)
Familiarity with event-driven architectures and messaging systems (e.g., Kafka, Service Bus)

What we offer

Competitive salary range
Medical insurance
Paid vacation and sick leaves
MultiSport card
Top equipment kit, co-workings
Hybrid set of works (Office location: Warsaw)
Collaborative and innovative work environment
Career growth and development opportunities
A chance to work with giants of the sports industry

About the project

Our partner leads the industry in generating dynamic sports videos for every digital destination. Their cutting-edge AI and Machine Learning technologies analyse live sports broadcasts from over 250 leagues and broadcast partners, including iconic names like the NBA, NHL, ESPN, FIBA and Bundesliga, to create personalized, short-form videos in real-time.

The solution empowers media rights owners to unlock new revenue streams and deliver a tailored fan experience across every digital platform. Join the high-profile Engineering team and discover the forefront of sports contents innovation.