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Senior .NET Developer

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Robert Half

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Location:
United States , La Jolla

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

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Job Description:

We are seeking an experienced Senior .NET Developer to support and enhance a mission-critical enterprise application built on a mixed VB.NET and C# codebase. This role is ideal for a hands-on developer with deep .NET experience who can quickly ramp up in a complex, partially modernized environment. The ideal candidate will bring strong problem-solving skills, experience working with legacy systems, and the ability to deliver fixes, enhancements, and new functionality with minimal onboarding.

Job Responsibility:

  • Analyze, maintain, and enhance existing application modules written in VB.NET and C#
  • Complete migration of remaining VB.NET components to C#
  • Deliver bug fixes, performance improvements, and new features in a timely manner
  • Work with SQL Server, including queries, stored procedures, and data integration logic
  • Support integrations with SharePoint, Excel/VBA, BI tools, and Power Automate workflows
  • Participate in builds and deployments using Azure DevOps pipelines
  • Collaborate with stakeholders to gather requirements and translate them into technical solutions
  • Ensure code quality, reliability, and maintainability across the application stack

Requirements:

  • 8+ years of experience in .NET development, including VB.NET and C#
  • Strong understanding of IIS and Windows Server hosting environments
  • Solid experience with SQL Server, including query writing, optimization, and stored procedures
  • Familiarity with Azure DevOps build and deployment pipelines
  • Experience working with and modernizing legacy codebases
  • Experience integrating with SharePoint and Excel/VBA
  • Knowledge of Power Automate workflows and BI/reporting tools
  • Ability to quickly understand existing architecture and deliver results with minimal guidance
  • Strong communication skills and ability to collaborate across technical and business teams

Nice to have:

  • Experience with migration or modernization projects
  • Background supporting mission-critical enterprise applications
What we offer:
  • Medical
  • Vision
  • Dental
  • Life and disability insurance
  • 401(k) plan

Additional Information:

Job Posted:
May 03, 2026

Employment Type:
Fulltime
Work Type:
On-site work
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