Senior Full-Stack Developer(.Net + React)

Senior Remote
Europe, Albania, Hungary, Poland, Romania, Ukraine
Software Development, .NET, React, Engineering

Required skills

.NET/C# / expert
React.js / expert
Kubernetes / strong
AWS / strong
PostgreSQL / strong

Are you a Senior Full-Stack Developer looking to work on impactful projects in the automotive industry? Join Sigma Software and contribute to cutting-edge solutions that help prevent production faults before they happen.

This is a Senior role with a Remote work format, offering full-time engagement and direct collaboration with Customer teams. At Sigma Software, we value innovation, ownership, and engineering excellence — and we’ve been delivering high-quality solutions for over 20 years.

Why join us? You’ll work with a modern tech stack, cloud-native environments, and AI-assisted development tools, all while contributing to solutions that make a real difference in production quality.

Customer

Our Customer is a well-known German automotive manufacturer with a global presence and a strong reputation for innovation, quality, and engineering excellence. Sigma Software has been collaborating with this Customer for over five years, delivering high-impact software solutions that support their production processes and operational efficiency.

Project

The engagement involves three interconnected web-based solutions. The primary system aggregates data from multiple Customer systems, processes it, and transforms it into actionable insights. This data — covering organizational, technical, and operational aspects — is used preventively to detect and address potential faults in automotive production lines. In case of a fault, the system provides detailed information to facilitate root cause analysis.

Requirements

  • At least 5 years of professional software development experience
  • Strong hands-on expertise with .NET / C# and modern web technologies
  • Proven background in complex business domains and large-scale enterprise applications
  • Solid experience with ASP.NET Core / Web API, Entity Framework Core, database design and optimization
  • Strong front-end skills with React.js, Redux, Material UI, TypeScript, and modern JavaScript practices
  • Practical experience with cloud platforms (AWS, Azure, GCP)
  • Knowledge of CI/CD processes, automated delivery pipelines, and code quality practices
  • Experience working with containerized environments and Kubernetes
  • Familiarity with AI-assisted development tools and practices
  • Good understanding of software architecture principles, design patterns, and clean code
  • Experience working in Agile teams
  • Upper-Intermediate English level or higher

 

Personal Profile

  • Proactive, ownership-driven, and capable of working independently
  • Strong analytical and problem-solving skills
  • Comfortable collaborating with distributed, cross-functional teams
  • Adaptable to changing requirements and priorities

Responsibilities

  • Work directly with Customer engineering and product teams to understand business needs, clarify requirements, and propose effective technical solutions
  • 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 decision-making, and delivery planning
  • Identify and recommend technical improvements, risk mitigation strategies, and optimization opportunities
  • Develop scalable, reliable, and maintainable applications following engineering best practices
  • Work with containerized environments and Kubernetes-based deployments
  • 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 transparent communication and strong alignment with Customer expectations

WHY US

  • Diversity of Domains & Businesses
  • Variety of technology
  • Health & Legal support
  • Active professional community
  • Continuous education and growing
  • Flexible schedule
  • Remote work
  • Outstanding offices (if you choose it)
  • Sports and community activities

REF4063L

Share this vacancy

icon icon

Apply


    Drop your CV here, or

    Supports: DOC, DOCX, PDF, max size 5 Mb

    Take a quiz

    Take a quiz

      Was it comfortable to apply the CV?


      How did you find us?




      Did you hear about us before visiting the site?