Full Stack Developer (.NET / React)

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 fully remote opportunity.

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 Core
• C#
• Entity Framework Core
• PostgreSQL
• Apache Kafka
• OAuth 2.0
• FluentValidation

Frontend

• React 19
• TypeScript
• Redux Toolkit
• Material UI (MUI)

Tools & Infrastructure

• Docker
• Kubernetes
• Git
• Microservices Architecture
• WebSockets
• CI/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.

Zakres obowiązków

• 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.

Wymagania

• 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.

Tech stack

• .NET
• React