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.