Overview
Remote
Depends on Experience
Contract - W2
Job Details
We are seeking a Senior Software Engineer to support the modernization and migration of a legacy application stack. The ideal candidate will have an extensive background in C# .NET, ASP.NET MVC, and Microsoft SQL Server, with hands-on experience in upgrading and refactoring enterprise applications.
Responsibilities:
Required Skills & Qualifications:
Nice to Have:
Responsibilities:
- Upgrade and refactor legacy .NET applications (currently on .NET Framework 4.x / ASP.NET MVC 5) to .NET 9.
- Debug and maintain application layers: frontend (JavaScript/jQuery), middle tier (C#), and database (SQL Server).
- Write and optimize complex SQL queries and views across large-scale schemas (100,000+ tables).
- Work with Entity Framework to manage data access and persistence.
- Analyze and apply indexing strategies, query optimizations, and understand use of SQL optimizers.
- Apply table normalization, aggregation techniques, joins, and table hints in SQL Server.
- Utilize SOLID design principles in software architecture when appropriate.
- Ensure API security using OAuth, token-based authentication, and related standards.
- Collaborate with teams to modernize front-end components and explore modern JavaScript libraries/frameworks.
Required Skills & Qualifications:
- 7+ years of experience creating web applications with C#, .NET, and ASP.NET MVC.
- Proficient with Microsoft SQL Server, including complex views, stored procedures, etc.
- Professional experience using Entity Framework.
- Solid experience debugging across frontend, business logic, and data layers.
- Knowledge of indexing, query optimization, and execution plans.
- Proficient with JavaScript and jQuery.
- Experience implementing and maintaining OAuth, tokens, and API security protocols.
Nice to Have:
- Experience with Azure, Azure SQL, and Azure Functions.
- Proficiency creating single-page web applications using modern JavaScripts libraries and/or frameworks such as React.js, Node.js, Angular, etc.
- Understanding of cloud migrations and version control systems in the cloud.
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