Full Stack Engineer (.NET & React)

O projekcie: We are hiring on behalf of our client, a global innovator in fitness and wellness technology. Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere. We are looking for a Full Stack Engineer (.NET & React) to join the Content Platform team, focused on building systems that power music-related experiences across the product ecosystem. In this role, you will design and develop APIs and backend services that support everything from instructor class planning to real-time music playback during workouts. This is a hands-on engineering role with strong ownership, where you will work on distributed systems, collaborate across teams, and directly impact user-facing features at scale. What we offer:- 100% paid medical care- Multisport- Creative tax (KUP)- Home office allowance- MacBook Pro Wymagania: Requirements: Technical Expertise - 4+ years of professional software development experience- Strong knowledge of C# and .NET ecosystem- Experience building and maintaining RESTful APIs- Solid understanding of asynchronous programming and multi-threading- Experience with NoSQL databases (e.g., MongoDB)- Familiarity with microservices architecture Frontend & Platform Awareness - Working knowledge of React, Vue.js, or similar frontend frameworks- Understanding of system integration and API-driven development Engineering Practices - Experience with CI/CD pipelines, automated testing, and DevOps principles- Understanding of Agile and Lean development methodologies- Strong focus on code quality, maintainability, and scalability Collaboration & Mindset - Strong communication skills in English- Ability to work effectively in cross-functional teams- Comfortable working in fast-paced, evolving environmentsNice to Have- Experience with Docker and Kubernetes- Familiarity with AWS services (S3, SQS, Lambda)- Experience with messaging systems (e.g., NServiceBus, RabbitMQ) Stack: C#, .NET, REST APIs, React/Vue, MongoDB, AWS (S3, SQS, Lambda), microservices Codzienne zadania: - Design, build, and maintain scalable APIs and microservices supporting content and music-related features - Develop systems for managing music catalogs, class planning tools, and platform integrations - Ensure high performance, reliability, and scalability of backend services - Write clean, maintainable, and well-tested code with a focus on long-term sustainability - Drive best engineering practices, including CI/CD, automated testing, logging, and monitoring - Continuously improve system architecture while avoiding unnecessary complexity - Partner closely with Product, Design, and QA to deliver high-quality features - Actively participate in architecture discussions, code reviews, and technical planning - Translate UI/UX requirements into reliable backend solutions - Contribute to a culture of code quality, ownership, and continuous improvement - Promote practices such as refactoring, pair programming, and iterative development - Support knowledge sharing and help evolve engineering standards across the team