Senior Full-Stack .NET Developer

Optiveum; Warszawa; On-site; PLN 159,000 - 226,000; Full time

Job summary

Optiveum is recruiting a Senior Full-Stack .NET Developer for a European Union institution based in Warsaw. You will design, develop and support enterprise web applications using .NET and React, from requirements to deployment and 3rd-line support.

Ideal candidates have 6+ years in IT (3+ in similar roles), strong .NET 8/.NET Core, C#, ASP.NET Core, React/TypeScript, and EF/SQL Server, with OpenShift and Azure DevOps experience, and English B2 plus fluent Polish.

Qualifications

• EU citizenship is a requirement for this role.
• 6+ years in IT, including 3+ years in a similar development position.
• Strong experience with .NET 8/.NET Core, C# and ASP.NET Core.
• Front-end with React and TypeScript.
• Experience with Entity Framework and SQL Server.
• Azure DevOps pipelines experience.
• OpenShift/containers experience.
• Knowledge of SAML 2.0 / Entra ID authentication.
• Agile/Scrum experience.
• Advanced software development certification.
• English at least B2 and fluent Polish.

Responsibilities

• Designing, developing and maintaining enterprise web applications.
• Building and supporting solutions in .NET (C#, ASP.NET Core) and React (TypeScript).
• Translating business requirements into technical solutions.
• Taking part in testing, deployment, release management and production support.
• Optimising application performance, security and quality.
• Producing technical documentation and providing 3rd-line support.

Skills

React

TypeScript

C#

ASP.NET Core

.NET 8 / .NET Core

SQL Server

Azure DevOps

OpenShift

English (B2)

Polish fluency

Agile/Scrum

Advanced certification

Education

Advanced software development certification

Tools

Azure DevOps

OpenShift

Job description

Senior Full-Stack .NET Developer

About the Offer

We are currently looking for a Senior Full-Stack .NET Developer to join the team of our client, a European Union institution based in Warsaw. You will design, develop and support enterprise web applications built on .NET and React, from translating business requirements into technical solutions through to deployment, release management and 3rd-line production support. For this role, Optiveum is the recruitment partner, and the cooperation agreement will be signed directly with our contracting partner.

Key Details:

• Rate: up to 32 EUR/h net (B2B)

• Work Model: on-site/near-site in Warsaw, full-time (40 h/week)

• Location: Warsaw

• Important: EU citizenship is required for this role

Responsibilities:

• Designing, developing and maintaining enterprise web applications

• Building and supporting solutions in .NET (C#, ASP.NET Core) and React (TypeScript)

• Translating business requirements into technical solutions

• Taking part in testing, deployment, release management and production support

• Optimising application performance, security and quality

• Producing technical documentation and providing 3rd-line support

Requirements:

• EU citizenship

• 6+ years of IT experience, including 3+ years in a similar development role

• Strong experience with .NET 8 / .NET Core, C# and ASP.NET Core

• React and TypeScript on the front end

• Entity Framework and SQL Server

• Azure DevOps pipelines

• Experience with OpenShift / containers

• Knowledge of SAML 2.0 / Entra ID authentication

• Agile/Scrum experience

• An advanced software development certification

• English at least B2 and fluent Polish