Position Title :
Senior .NET Developer
Location : Phoenix, AZ (Onsite)
Position Type : Staff Augmentation
Duration : 7 Months (Projected Start : 01 / 05 / 2026)
Hours : 40 hrs / week (Day Shift)
Position Overview :
We are seeking a highly experienced Senior .NET Software Developer with 15+ years of professional development experience to join our team. The ideal candidate will serve as a technical leader, responsible for designing, developing, and maintaining enterprise-grade applications using the Microsoft .NET ecosystem. This role requires strong problem-solving skills, deep technical expertise, and the ability to build and maintain legacy applications while collaborating across teams.
Key Responsibilities :
- Lead the design, development, and deployment of scalable .NET applications.
- Architect solutions using C#, ASP.NET Core , and related frameworks.
- Collaborate with product managers, business analysts, and QA teams to deliver high-quality software.
- Optimize application performance, security, and maintainability.
- Integrate applications with SQL Server , Entity Framework , and external APIs.
- Conduct code reviews, enforce best practices, and mentor junior developers.
- Stay current with emerging technologies and recommend adoption where appropriate.
- Troubleshoot complex issues and provide long-term solutions.
- Participate in Agile / Scrum ceremonies and contribute to continuous improvement.
- Implement secure coding practices to prevent vulnerabilities (SQL injection, XSS, CSRF, etc.).
- Collaborate with security teams for threat modeling, risk assessments, and vulnerability remediation.
Required Skills & Qualifications :
15+ years of professional software development experience with .NET Framework and .NET Core .Strong proficiency in C#, ASP.NET MVC, ASP.NET Core, Web API .Expertise in SQL Server, Entity Framework, LINQ .Experience with front-end technologies ( JavaScript, TypeScript, Angular / React, HTML5, CSS ).Solid understanding of OOP, design patterns, SOLID principles .Hands-on experience with cloud platforms (AWS preferred) .Familiarity with CI / CD pipelines, Git, DevOps practices .Strong problem-solving, analytical, and communication skills.Ability to work independently and lead technical initiatives.Preferred Skills :
Previous experience with State contracts .Managing legacy application landscapes.Additional Information :
Local candidates only must be available for in-person interviews within 1 week of posting close date and able to start within 2 weeks of offer.Security clearance required background check and drug screening via HireRight.No travel required.