> Markdown version of [/jobs/ext/1204498-sr-net-developer](https://www.wearedevelopers.com/jobs/ext/1204498-sr-net-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr. .Net Developer - **Company:** Expert Technology Services - **Location:** Phoenix, AZ, United States - **Experience:** Expert - **Contract:** Temporary to permanent - **Skills:** ASP.NET, JavaScript (Programming Language), .NET Framework, Unit Testing, Bootstrap (Software), C Sharp (Programming Language), Software Quality, Database Queries, Software Design Documents, Entity Framework, Microsoft Visual Studio, Microsoft SQL Server, Performance Tuning, Software Engineering, Software Systems, SQL Server Integration Services, Transact-SQL, TypeScript, Web Applications, Web Services, .NET Core, ReactJS, React Redux, Restful APIs, Code Restructuring - **Published:** July 8, 2026 - **Apply:** https://www.careerjet.com/jobad/usd8d15dbf519f6e0af0385ea491b21ace ## About the Role Expert in C#, .NET (including .NET Core), Visual Studio - Advanced ASP.Net 4.0+, Entity Framework - Advanced Web Services, RESTful API integration - Expert SQL Server, SSIS, T-SQL - Proficient in Bootstrap, JavaScript, React (with hooks, state management via Redux or Context API), and TypeScript - Understanding of component lifecycle and performance optimization best practices - Must pass background check and drug screening (HireRight). - Must be available for in-person interview and able to start within 2 weeks of offer. ## Description Hybrid role based in Phoenix, AZ (local candidates only; must specify location in resume). - Initial onsite training and onboarding for first 3 months; reduced onsite presence thereafter (as little as once a week or less). - Designs, develops, tests, and debugs web applications for business use. - Strong SQL skills required, including T-SQL optimization, refactoring, and performance tuning (concurrency & latency). - Reviews, tests, and ensures code quality for structured programs. - Prepares and conducts unit testing to ensure software meets specifications. - Analyzes automation requests and translates requirements/specs into software solutions. - Creates project work plans, develops schedules, and provides time/cost estimates. - Produces required technical documentation (Technical Specs, Design Docs, etc.) following SDM standards. - Collaborates with users to understand requirements, provide enhancements, and resolve issues for existing applications. - Participates in all phases of full software development lifecycle. - Prepares and communicates routine project status reports to customers. - Attends team and technical meetings as required. ## Related Videos - [Why you must use TDD now!](https://www.wearedevelopers.com/videos/114-why-you-must-use-tdd-now) - [Building Multi-Tenant ASP.NET Core Applications: Best Practices and Real-World Solutions](https://www.wearedevelopers.com/videos/1552-building-multi-tenant-asp-net-core-applications-best-practices-and-real-world-solutions) - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [Functions Triggers using Azure Event Grids in Azure Blob Storage](https://www.wearedevelopers.com/videos/47-functions-triggers-using-azure-event-grids-in-azure-blob-storage) - [This Is Not Your Father's .NET](https://www.wearedevelopers.com/videos/967-this-is-not-your-father-s-net) - [Blazor – the new SPA Framework for everyone who hates JavaScript](https://www.wearedevelopers.com/videos/699-blazor-the-new-spa-framework-for-everyone-who-hates-javascript) ## Related Articles - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers)