Top Senior .NET Developer Jobs in Phoenix, AZ

Responsible for architecting and developing .NET web applications, defining product requirements, managing technical direction, and mentoring team members.

Design, code, test, and debug .NET web applications using full SDLC. Develop technical specs, optimize SQL/T-SQL and SSIS, tune concurrency/latency, integrate RESTful APIs, and implement front-end features with React/TypeScript and Bootstrap while collaborating with users and stakeholders.

The .Net Web Developer will analyze, design, develop, test, and implement web applications, focusing on security and data management.

Lead and mentor an engineering team building GovIntel and GovChannel product capabilities. Own technical direction, design and deliver scalable SaaS features, APIs, integrations, and platform reliability. Partner with Product, QA, Cloud Ops, and stakeholders to prioritize work, drive CI/CD and observability practices, lead reviews and incident response, and apply AI-assisted tools to improve development speed and quality.

The Senior .NET Developer will work on developing and maintaining applications, mentor junior developers, and ensure compliance with regulations. The role requires expertise in full-stack development, particularly with SQL Server databases and Azure.

The Senior .Net Developer will enhance SDG's C#/.NET Core codebase, design high-load services, and optimize MS SQL queries, benefiting from a remote work environment and attractive benefits.

As a Senior Software Engineer at PerfectServe, you'll design, build, and maintain high-quality code for healthcare communication systems, mentoring junior engineers and collaborating across teams to improve patient care and clinical workflows.

Lead backend development on the scheduling platform modernization, contribute across products, write APIs, and drive AI-accelerated software development workflows.

Lead backend development on the scheduling platform modernization. Contribute across Python and .NET ecosystems, write APIs, review code, and support AI-accelerated development workflows while collaborating in a remote team environment.

The Senior .NET Software Engineer will drive development of .NET software products, focusing on back-end engineering, code reviews, and collaborating with cross-functional teams.

The Staff Software Engineer will design .NET infrastructure, automate builds, maintain tooling for .NET libraries, and mentor peers while ensuring security and reliability.

The role involves full-stack software development, adhering to Agile practices, and collaborating across teams. Responsibilities include coding, testing, and maintaining software systems while mentoring team members.

Senior-level engineer responsible for complex platform design, coding, testing, performance tuning, and leading development efforts. Acts as technical escalation point, mentors developers, and delivers enterprise .NET/SQL solutions in an Agile/SCRUM environment.

Senior full-stack developer responsible for designing, developing, and maintaining .NET/Angular web applications. Tasks include adding features, bug fixes, performance tuning, troubleshooting complex issues, mentoring junior developers, supporting deployments, and ensuring security/compliance. Works in Agile teams, collaborates with architects, and may provide 24x7 production support.

Design, analyze, modify and develop .NET (3.0–4.5) applications using C#. Develop and optimize complex T-SQL and Oracle PL/SQL queries. Implement WCF and MVC components. Perform unit testing, documentation, code reviews, and use TFS for source control.

Design, develop, test, enhance, and maintain user-facing web applications. Collaborate on UI/UX implementations, propose modern tools, troubleshoot defects, and document code. Coordinate multiple projects and ensure high-quality, maintainable solutions.

Onsite senior .NET developer responsible for developing, maintaining, and administering MS SQL Server databases, building/debugging custom screens and queries, and developing reports with Crystal Reports. Work includes web programming (HTML, ASP, JavaScript), website setup/management, database utilities (backup/restore/reorg), troubleshooting, and supporting regulatory licensing/compliance processes. Acts as the department Database Administrator and must clear background check and be authorized to work in the U.S.

Develop and maintain .NET multi-tier applications, provide application and database support, analyze and resolve issues, design relational databases, create technical design specifications, and collaborate with teams to implement solutions.

Develop, analyze, modify, and create .NET (3.0–4.5) applications using C#. Build and maintain Web Forms and MVC apps, Entity Framework data access, WCF services, and advanced T-SQL queries. Use TFS for source control, produce technical documentation, perform unit testing and code reviews, and work within Agile/SDLC teams.

Onsite contract role in Phoenix for a Senior .NET Developer to perform full life-cycle application development, maintain and fix existing applications, and handle other assigned tasks. Requires strong C#, ASP.NET, JavaScript/jQuery, Oracle and SQL Server experience and familiarity with legacy Windows environments.

Onsite senior .NET developer responsible for full life-cycle application development (60%), fixing and improving existing applications (30%), and miscellaneous tasks (10%). Work uses .NET frameworks, C#, ASP.NET, JavaScript/jQuery, MVC/Webforms, and Oracle databases.

Onsite contract .NET Developer in Phoenix responsible for analyzing and developing .NET (3.0-4.5) C# applications and T-SQL/SQL Server code (85%), plus unit testing, documentation, and formal code reviews (15%).

Designs and develops web and desktop applications using VB.NET. Manages full application lifecycle, authors documentation, leads coding efforts, collaborates with business and peers, and ensures timely, high-quality deliveries.

Design and develop web-based UIs, middle-tier components, data access layers and T-SQL. Apply OOP principles, work independently, collaborate with BAs and QA, and use TFS for source control.

Design, develop, modify, test and debug ASP.NET/VB.NET web applications. Build and maintain ETL and reporting solutions using SSIS and SSRS. Work with IBM MQ integrations, troubleshoot issues, and promote code through development, test, and production environments.