We are looking for a Full Stack .NET Developer to join a long-term commercial project for a US-based company. This is an opportunity to work in an international environment, within Agile/SCRUM teams, delivering modern and scalable solutions. 3–5 years of professional experience with C# / ASP.NET Strong hands-on experience with JSON and Web API in production environments Proficiency with Angular 6+ Solid knowledge of HTML/HTML5, XML, CSS/CSS3 Strong background in .NET Framework 4.5+ and .NET Core Experience with relational (PostgreSQL) and NoSQL databases (MongoDB, DynamoDB) Solid understanding of OOP principles and design patterns Hands-on experience writing unit tests (NUnit / MSTest) Previous experience with DevOps and CI/CD tools (Git/Bitbucket) Proven track record of working in Agile / SCRUM teams Strong knowledge of async/await and the TPL library Good understanding of cross-browser compatibility issues and solutions Nice to have: Experience with multi-threaded programming (procedural and functional paradigms) Familiarity with Elasticsearch Experience developing and maintaining cloud-based solutions (AWS) What will you do? Develop and maintain full-stack applications using .NET Core / ASP.NET and Angular Build and consume RESTful APIs Write clean, maintainable, and well-tested code Collaborate with cross-functional teams in Agile/SCRUM Work with SQL and NoSQL databases Contribute to CI/CD pipelines and code reviews Troubleshoot and optimize application performance What do we offer? Rate: up to 95 PLN/h (B2B, net + VAT) Convenient payment method with a short 14-day invoice payment term Comprehensive private medical care package Access to the MyBenefit cafeteria platform (including Multisport cards, prepaid cards for Ikea, Zalando, Notino, and many more)