Senior.NET Fullstack Developer

WarsawRemote

AI Summary

Develops, maintains, and modernizes business-critical full-stack applications using .NET, C#, and Azure, while designing new functionalities for research entity registration and improving CI/CD pipelines and engineering quality.

About this role

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!