Fullstack Developer

At Cyclad, we collaborate with top international IT companies to deliver modern digital products and innovative technologies. This position involves working on a long-term IT services project for a US-based client in the fitness industry, within a distributed international team.

• Minimum 3 years of commercial software development experience
• Strong experience with C# and .NET Core / .NET 8+
• Experience with ASP.NET Web API, Entity Framework Core, and SQL Server
• Practical experience with React and React Native
• Good knowledge of TypeScript, JavaScript, HTML5, and CSS3
• Knowledge of Clean Code, SOLID principles, and design patterns
• Experience with unit and integration testing
• Practical experience using AI-assisted development tools such as GitHub Copilot, Claude Code, ChatGPT, or OpenAI API
• Fluent Polish (mandatory)
• Minimum B2 level of English, both written and spoken
• Ability to work independently and effectively in a fully remote environment
• Strong communication and collaboration skills

Nice to have:

• Knowledge of Domain-Driven Design (DDD) and CQRS
• Experience with microservices architecture and cloud-native solutions
• Experience with Microsoft Azure services, such as App Services, Service Bus, Azure SQL, and Azure DevOps
• Knowledge of Docker and containerization
• Familiarity with Azure Cosmos DB and Cloud/DevOps patterns
• Interest in integrating AI/ML into commercial applications
• Experience in fitness, health & wellness, or other B2C solutions
• Experience publishing or maintaining applications in the App Store and Google Play

• Develop and maintain backend, web, and mobile solutions
• Build secure and scalable backend services and REST APIs using C#, .NET, ASP.NET Web API, Entity Framework Core, and SQL Server
• Develop responsive web and mobile features using React, React Native, TypeScript, JavaScript, HTML5, and CSS3
• Develop business logic and optimize SQL Server database structures
• Apply Clean Code, SOLID principles, and design patterns
• Write and maintain unit and integration tests
• Use AI-assisted development tools such as GitHub Copilot, Claude Code, ChatGPT, or OpenAI API
• Participate in technical discussions, code reviews, and task estimation
• Collaborate with developers and other team members in a distributed international environment
• Create and maintain technical documentation in Polish and English