Senior .NET Fullstack Developer

Senior .NET Fullstack Developer About the role: We are Optiveum, and we are currently looking for a Senior .NET Fullstack Developer to join the team of our client—a global, research-driven organization. In this setup, Optiveum acts as the recruitment and contracting party, meaning you will sign the B2B cooperation agreement directly with us. Key Details: - Location: 100% Remote (Based in Poland / Warsaw) - Rate: Up to 36 EUR/h - Mode of work: Full-time (40 hours/week) - Language requirement: English (Fluent) What you will be doing: - Developing, maintaining, and improving business-critical full-stack applications. - Modernizing legacy applications and migrating solutions to current versions of .NET. - Working seamlessly across all application layers, including UI, backend services, APIs, and data sources. - Designing and implementing new functionalities that support the registration of new molecules and other research entities. - Establishing and improving Azure infrastructure for both modernized and existing applications. - Creating and maintaining CI/CD pipelines using GitHub Actions. - Improving engineering quality through automated testing, code reviews, secure development practices, observability, and comprehensive documentation. - Supporting applications throughout their lifecycle, balancing maintenance, operational stability, technical debt reduction, and new development. What we are looking for: - Several years of senior-level professional experience in full-stack software development. - Strong, hands-on experience with C# and .NET, including maintaining existing solutions and upgrading/migrating legacy applications to newer versions. - Practical knowledge of Oracle databases, SQL, data access, and integration between applications and database platforms. - Hands-on experience with Azure cloud services and CI/CD pipelines (preferably GitHub Actions). - A broad understanding of software architecture, APIs, application security, testing, and deployment. - A self-driven working style with the confidence to take full ownership of tasks and solutions. - Fluent English communication skills. Does this sound like a match? Apply today! Originally posted on Himalayas