Summary
✨ AI‑Generated
A hybrid Full Stack Developer position focused on building and maintaining modern applications across frontend and backend layers. The role involves developing React and TypeScript interfaces, C# and .NET services, REST APIs, database access, real-time communication, and event-driven microservices. You will participate in design, testing, deployment, code reviews, troubleshooting, and architectural discussions.
Highlights
Hybrid full-stack development role with broad ownership across frontend, backend, databases, APIs, and real-time systems. The position provides opportunities to contribute throughout the software lifecycle, participate in architecture and technical design, and work with modern microservices and event-driven systems.
Description
Full Stack Developer (.NET / React)
Role Summary:
We are looking for a Full Stack Developer who will develop and maintain full-stack applications using .NET and React.
Work on backend services and APIs, frontend pages, databases, and real-time systems within a modern microservices architecture.
Contribute to the full software development lifecycle, from design and implementation to testing and deployment.
This is a hybrid role, with two days per week working from the Kraków office.
Key Responsibilities:
Build frontend applications using React and TypeScript.Develop and maintain backend services using C# and .NET.Design and implement REST APIs and real-time communication solutions.Develop and optimize data access using PostgreSQL and Entity Framework Core.Work with event-driven architectures using Apache Kafka.Participate in architecture discussions, code reviews, and technical design activities.Troubleshoot and resolve issues across the full application stack.Collaborate with Product Owners, UX designers, AQAs and other engineering teams.
Required Skills
Strong experience with C# and .NET (ASP.NET Core).Strong experience with React, TypeScript, and Material UI.Experience building and consuming REST APIs.Experience with PostgreSQL or other relational databases.Knowledge of Entity Framework Core and SQL optimization.Experience with Redux Toolkit or similar state management solutions.Familiarity with Docker and containerized development environments.Understanding of software engineering best practices, including testing, code reviews, and CI/CD.
Nice to have
Experience with Apache Kafka, event-driven systems, or messaging platforms.Experience with WebSockets and real-time applications.Knowledge of microservices architectures.Knowledge of API security, authentication, JWT, etc.Experience with GIS, mapping, or data visualization technologies such as MapLibre, deck.gl, or ECharts.Experience with NoSQL time-series databases.Background in the energy domain.
TechnologiesBackend
.NET 8, .NET 9, .NET 10, ASP.NET CoreC#Entity Framework CorePostgreSQLApache KafkaOAuth 2.0FluentValidation
Frontend
React 19TypeScriptRedux ToolkitMaterial UI (MUI)
Tools & Infrastructure
DockerKubernetesGitMicroservices ArchitectureWebSocketsCI/CD Pipelines
What can you expect
Team of passionate people who love what they do.Opportunity to learn and grow.Private Medical Care - INTER Polska.Co-funded Multisport Card.Possible training or certification subsidies.Rate: 160-180 PLN net/h.
