Fullstack Developer (.NET + React)

co.brick talents is a company focused on delivering software products powered by AI and people. The position serves a client with a distributed team, working on building and maintaining a secure and scalable product using modern technologies.

• Minimum 3 years commercial software development experience.
• Proficient with C#, .NET Core / .NET 8+, ASP.NET Web API, Entity Framework Core, and SQL Server on the backend.
• Practical experience with React, React Native, TypeScript, JavaScript, HTML5, and CSS3 for frontend and mobile development.
• Knowledge of Clean Code, SOLID principles, design patterns, and software testing.
• Experience with AI-assisted development tools like Claude Code, GitHub Copilot, ChatGPT, or OpenAI API.
• Ability to work effectively in a fully remote, distributed team environment.
• Fluent in Polish (C1) and at least B2 proficiency in English (speaking and writing).

Nice to have:

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

• Develop and maintain backend, web, and mobile solutions end-to-end.
• Build backend services and REST APIs using C#, .NET 10+, ASP.NET Web API, Entity Framework Core, and SQL Server.
• Implement frontend and mobile applications using React, React Native, TypeScript, JavaScript, HTML5, and CSS3.
• Optimize business logic and database structures with Entity Framework Core.
• Apply Clean Code, SOLID principles, and design patterns; write unit and integration tests.
• Utilize AI tools like GitHub Copilot, Claude Code, ChatGPT, and OpenAI API for code generation and refactoring.
• Participate in technical discussions, code reviews, and task estimations.
• Create and maintain technical documentation in Polish and English.

Data controller is co.brick Sp. z o.o. with registered office in Gliwice, Poland. Personal data will be processed for recruitment purposes only. Providing mandatory data is required by Polish labor law. Candidates have data subject rights including access, correction, deletion, and objection. Consent for additional data processing is voluntary and may be withdrawn any time. Data will be processed until recruitment ends and for potential claims. Data recipients include Just Join IT and contracted processors.