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November 4, 2026

Senior Full-Stack Developer

Senior • Remote

110 - 135 PLN/yr

Warsaw, Poland

Quick Facts

  • Role: Senior Full-Stack Developer

Description

Design and implement solutions across microservices and Micro Frontends, including greenfield projects. Build backend services in .NET 6+ and frontend applications with React, TypeScript, and JavaScript, with GraphQL APIs and asynchronous messaging via RabbitMQ/MassTransit. Work on data models using Microsoft SQL Server and NoSQL databases, unit tests, and CI/CD pipelines in GitLab.

Responsibilities

  • Design technical architecture for IT solutions, including microservices and Micro Frontends, and deliver greenfield projects

  • Implement backend services in .NET 6+ and frontend functionality with React, TypeScript, and JavaScript

  • Design and implement GraphQL APIs using Apollo Client and React Relay; implement asynchronous communication with RabbitMQ and MassTransit

  • Design data models and implement database solutions using Microsoft SQL Server and NoSQL (Elasticsearch, MongoDB, CosmosDB)

  • Prepare unit tests using xUnit, NUnit, and Jest; build and maintain CI/CD processes in GitLab

  • Apply design patterns and good programming practices; leverage AI tools supporting software development

  • Prepare technical documentation

  • Collaborate with architects, analysts, testers, and business representatives

Requirements

  • Minimum 7 years of commercial development with .NET 6 or newer

  • Minimum 5 years of web application development with React

  • Minimum 2 years of experience with GraphQL

  • Experience independently defining technical architecture and designing microservices architecture

  • Experience with greenfield projects

  • Minimum 1 year with asynchronous communication using RabbitMQ and MassTransit

  • Experience working with relational and NoSQL databases and maintaining CI/CD processes

  • Experience working in Agile teams and performing code reviews

  • Knowledge of TypeScript and JavaScript and UI/UX design principles

  • Knowledge of Apollo Client and React Relay

  • Knowledge of Microsoft SQL Server, Elasticsearch, MongoDB, and CosmosDB

  • Knowledge of unit testing tools/frameworks: xUnit, NUnit, Jest

  • Knowledge of design patterns, SOLID, and Clean Code

Benefits

  • Sports card co-financing

  • Ongoing support from a consultant

  • Employee referral program

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