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Offer summary
(Summary generated by AI based on the full job description)
The project supports a global research organization with applications for registering new molecules and related processes. Key stack includes C#, .NET with Oracle SQL, Azure and GitHub Actions. Responsibilities cover full‑stack development and maintenance, modernizing and migrating legacy .NET solutions, designing registration features, establishing Azure infrastructure, creating CI/CD pipelines, automated testing, code reviews, security practices and lifecycle support. Rate: up to 36 EUR/h.
Senior .NET Fullstack Developer
Company: OPTIVEUM SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ
from: 5 October 2026
to: 4 November 2026
salary not specifiedB2B contract (full-time)
Salary details
Rate: Up to 36 EUR/h
Offer parameters
level:senior
working mode:remote
location:Warszawa, Masovian
Warszawa, Masovian
Requirements
Expected technologies
C#
.NET
Oracle
SQL
Azure DevOps
GitHub Actions
Our requirements
- 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.
Your responsibilities
- 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.
About the project
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)
- Does this sound like a match? Apply today!
Benefits
- remote work opportunities
- integration events
OPTIVEUM SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ
Optiveum is acting as a sourcing partner for this role. You will be signing a cooperation agreement directly with our partner—a renowned IT contracting company with nearly 20 years of presence on the market.
The end client operates in the international public, defense, or government administration sector, leading large-scale, multi-million euro digital transformation projects.
This is how we work
Senior .NET Fullstack Developer
I apply to:
OPTIVEUM SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ
Warszawa, Masovian
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