Senior Full Stack.NET Developer (f/m/x)

About the Position

We are seeking a Senior Full Stack .NET Developer to build and maintain modern enterprise applications using.NET and React technologies. You will design scalable microservices, develop responsive user interfaces, optimize database performance, and collaborate with cross-functional teams to deliver secure, high-quality software solutions following Agile and DevOps best practices.

Responsibilities

• Designing, developing, and maintaining end-to-end web applications using ASP.NET Core, React.js, and microservices architecture
• Building secure REST APIs, implementing authentication and authorization mechanisms, and developing responsive user interfaces using modern JavaScript frameworks
• Optimizing PostgreSQL databases by designing schemas, improving query performance, and implementing efficient migration strategies
• Deploying, monitoring, and maintaining containerized applications using Docker, Kubernetes, and CI/CD pipelines across cloud environments
• Collaborating with architects, QA engineers, DevOps teams, and business stakeholders while troubleshooting production issues and ensuring software quality

Requirements

• Minimum 6 years of professional experience in full stack application development using C#, ASP.NET Core, Web API, Entity Framework Core, and React.js
• Strong knowledge of JavaScript, TypeScript, Redux/Context API, PostgreSQL, microservices architecture, authentication (JWT, OAuth2, IdentityServer), and REST API development
• Hands-on experience with Docker, Kubernetes, CI/CD tools (Azure DevOps, Jenkins, or GitHub Actions), Git, and Agile/Scrum methodologies
• Familiarity with cloud platforms (Azure, AWS, or GCP), unit testing frameworks, message brokers (RabbitMQ or Kafka), and distributed systems; knowledge of OPC UA or industrial automation is an advantage
• Fluent English - minimum B2 level

Nice to Have

• Experience with industrial automation or manufacturing domain projects
• Knowledge of Helm charts, Kubernetes networking, and scalable distributed architectures
• Familiarity with performance tuning, load testing, and application monitoring tools
• Experience implementing automated testing using xUnit, NUnit, or Jest
• Opportunity to work with modern cloud-native technologies in a collaborative Agile environment

We Offer

• Diverse portfolio of clients
• Wide portfolio of technologies
• Employment stability
• Remote work opportunities
• Contracts with the biggest brands
• Great Place to Work Europe
• Many experts you can learn from
• Open and accessible management team

About the Company

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Location

City: Bangalore

Country: India

Remote: No

Salary

Min: 6000.0 PLN

Max: 8000.0 PLN

Currency: PLN

Period: Hourly

Job Details

Job Title: Senior Full Stack.NET Developer (f/m/x)

Experience Level: Senior

Employment Type: CONTRACTOR

Work Location Type: Hybrid