Senior Software Engineer (.NET)

Senior Software Engineer (.NET)

Posted 1 day ago by 1760447638

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Negotiable
Outside
Remote
USA
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Summary: We are seeking a Senior Software Engineer to modernize and migrate a legacy application stack, requiring extensive experience in C# .NET, ASP.NET MVC, and Microsoft SQL Server. The role involves upgrading and refactoring enterprise applications while ensuring robust application performance and security. The ideal candidate will possess strong debugging skills across various application layers and be proficient in SQL query optimization. Collaboration with teams to modernize front-end components is also a key aspect of this position.

Key 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.

Key Skills:

  • 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.

Salary (Rate): undetermined

City: undetermined

Country: USA

Working Arrangements: remote

IR35 Status: outside IR35

Seniority Level: Senior

Industry: IT

Detailed Description From Employer:

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:

  • 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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