Full Stack Developer (.NET / React)

Engenious; Kraków; Remote; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Private Medical Care - INTER Polska

Co-funded Multisport Card

Training or certification subsidies

Job summary

Engenious is seeking a Full Stack Developer to build and maintain modern microservices using .NET and React, including backend services, APIs, frontend pages, databases, and real-time systems. This is a fully remote opportunity spanning our distributed team.

You'll work with C#, ASP.NET Core, React, TypeScript, and PostgreSQL, implementing REST APIs, real-time features with WebSockets, and containerized development with Docker. Collaboration with Product Owners and QA is encouraged.

Qualifications

• Proficient in C# and .NET (ASP.NET Core) with strong backend and API experience.
• Strong frontend skills with React, TypeScript and Material UI.
• Experience designing and consuming REST APIs.
• Experience with PostgreSQL or relational databases.
• Knowledge of Entity Framework Core and SQL optimization.
• Familiarity with Redux Toolkit or similar state management.
• Experience with Docker and containerized development environments.

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 EF Core.
• Work with event-driven architectures using Kafka.
• Participate in architecture discussions, code reviews, and technical design activities.
• Troubleshoot and resolve issues across the full stack.
• Collaborate with Product Owners, UX designers, QA and other engineering teams.

Skills

C# and .NET (ASP.NET Core)

React, TypeScript, and Material UI

REST APIs

PostgreSQL databases

Entity Framework Core and SQL optimize

Redux Toolkit

CI/CD and testing

Tools

Docker

Git

WebSockets

Job description

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.
• C#
• Entity Framework Core
• OAuth 2.0
• FluentValidation

Frontend

• React 19
• TypeScript
• Material UI (MUI)

Tools & Infrastructure

• Docker
• Git
• WebSockets

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.