Senior Full-Stack (.Net + React) Developer

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.

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

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