.NET Developer (Support)

Job Title : Senior .NET Developer Support & Maintenance

Location : EU (Remote)

Start Date : ASAP

Contract Duration : Until December 2025 (with extension potential)

Working Method : Remote

Language Requirements : English (Fluent)

Role Overview

We are looking for a Senior .NET Developer to join our support and maintenance team, focused on providing 2nd and 3rd line support for our clients existing .NET applications. This is a long-term engagement, with a key emphasis on ensuring service continuity and stability across a suite of business-critical systems.

The role involves addressing incidents, performing bug fixes, and managing maintenance tasks for .NET-based web applications.

Key Responsibilities

Provide 2nd and 3rd line application support for existing .NET applications

Investigate, resolve, and document incidents and service requests

Maintain, optimize, and enhance legacy systems built in ASP.NET Core

Write and manage SQL Server stored procedures

Collaborate with other IT and business teams to ensure timely resolution and support

Maintain a high standard of code quality and documentation

Monitor application performance and recommend improvements when needed

Required Skills

Proficiency in ASP.NET Core 7 or higher

Strong knowledge of JavaScript and jQuery

Hands-on experience with Microsoft SQL Server and stored procedures

Familiarity with authentication and identity systems (IAM, Azure AD nice to have)

Solid experience in legacy .NET environments without modern ORM frameworks (e.g., no NHibernate, no Entity Framework)

Nice to Have

Experience working in distributed support environments

Familiarity with service continuity planning and multi-resource allocation

Prior experience in support roles with long-lifecycle enterprise systems

If you're an experienced .NET Developer with a strong focus on application support and maintenance, and you're looking for a long-term remote opportunity, wed love to hear from you.