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Sigma Software 21 day ago

Senior Full-Stack Developer(.Net + React)

Remote · Warsaw, Mazovia, Poland

Type
Full Time
Level
Senior Level
Education
Not Specified
Company size
Unknown
Industry
Information Technology And Services

Job Summary

Senior Full-Stack Developer with .NET and React.js for an automotive-industry project. Take ownership of end-to-end feature delivery from technical analysis and design to implementation, testing, and production support. Design, develop, and maintain high-quality full-stack solutions using .NET, React.js, and cloud technologies; participate in architecture discussions, technical decisions, and delivery planning; identify and implement technical improvements and risk mitigation; develop scalable, reliable applications following engineering best practices; work with containerized environments and Kubernetes; apply AI-assisted development approaches to improve productivity and code quality; collaborate closely with distributed teams (developers, QA, product owners, architects); contribute to code reviews, technical documentation, and knowledge sharing; maintain strong alignment with Customer expectations. Requires at least 5 years of professional software development experience and strong hands-on expertise with .NET/C#, ASP.NET Core/Web API, EF Core, React.js, Redux, TypeScript, and modern JavaScript. Cloud experience (AWS/Azure/GCP), CI/CD, and Kubernetes experience are expected, along with Agile teamwork and proficient English.

Required Qualifications

  • 5+ years of professional software development experience
  • Strong hands-on expertise with .NET / C# and modern web technologies
  • Proven background in complex enterprise applications
  • Experience with ASP.NET Core / Web API, EF Core, database design/optimization
  • Strong front-end skills with React.js, Redux, Material UI, TypeScript, JavaScript
  • Cloud experience (AWS, Azure, GCP)
  • Experience with CI/CD and automated delivery pipelines
  • Experience with containerized environments and Kubernetes
  • Familiarity with AI-assisted development tools
  • Knowledge of software architecture principles, design patterns, and clean code
  • Experience in Agile teams
  • Upper-Intermediate English level or higher
  • Proactive, ownership-driven, able to work independently
  • Strong analytical and problem-solving skills
  • Able to collaborate with distributed teams
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Sigma Software 2

Senior Full-Stack Developer(.Net + React)

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