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!