Senior .NET Developer

Science Systems and Applications, Inc. (SSAI) is seeking experienced Senior .NET Developers to support mission-critical application development for a public sector client. Multiple openings may be available. The selected candidates will work on modern web-based and cloud-based systems, support complex application modernization efforts, and collaborate with technical teams, project leadership, and business sponsors to deliver high-quality software solutions.

• This position is expected to be performed on-site in Los Angeles, CA.
• Candidates must be able to successfully complete fingerprint and criminal background check clearance before working.
• Position is contingent upon customer approval and work order requirements.
• Estimated Duration: 6 months, with a possible 6-month extension, * Design, develop, enhance, and support complex .NET web applications, API services, functions, workflows, and database-driven solutions.
• Coordinate application development activities, including requirements, schedules, troubleshooting, development support, and production support across multiple environments and platforms.
• Lead system design and development using modern development methodologies, tools, and standards.
• Perform unit testing, integration testing, load testing, and validation of complex websites, system integrations, and application interfaces.
• Support the design and implementation of database architecture, data loads, data quality assurance, and stored procedure development.
• Gather and analyze customer software requirements and recommend practical software solutions and technologies that address business needs.
• Establish and follow consistent development standards, practices, and procedures that support high-quality application delivery.
• Work with project managers, leadership, technical teams, and business users to estimate work, communicate project status, and support change revisions.
• Participate in application design strategy sessions, code reviews, and technical planning meetings.
• Mentor other team members as needed and support knowledge transfer across the development team.
• Create and maintain technical documentation, user guides, and support materials for system applications and end users.

This role is ideal for a senior developer with strong hands-on experience in .NET, C#, ASP.NET/MVC, API services, front-end development, Angular, Entity Framework, SQL Server, and enterprise application support. Candidates should be comfortable working in a fast-paced environment, leading technical efforts, troubleshooting issues across multiple environments, and providing clear communication to both technical and business audiences., * 5+ years of experience building complex .NET web applications, API services, functions, workflows, and SQL-based solutions.

• 5+ years of ASP.NET/MVC development experience.
• 5+ years of C# programming experience.
• 5+ years of REST/SOAP API and web services design experience.
• 5+ years of .NET Core development experience.
• 3+ years of modern/mobile responsive front-end development using JavaScript, jQuery, Bootstrap, HTML5, and CSS3.
• 3+ years of Angular development experience.
• 3+ years of Entity Framework and SQL Server 2012 or higher database experience.
• Experience using GitHub Copilot or another AI-assisted development tool.
• Strong analytical, evaluation, troubleshooting, and problem-resolution skills.
• Strong verbal and written communication skills, including the ability to communicate with developers, IT teams, project leadership, and business sponsors.
• Ability to provide demos, presentations, documentation, and knowledge transfer to technical and non-technical audiences.
• BS/BA degree in Computer Science, Information Technology, or a related field. Additional qualifying experience may be substituted for the degree requirement on a year-for-year basis.

Desired Qualifications:

• .NET Framework 4.5 or above, WebForms, Razor, Ajax, multithreading, and enterprise web application development.
• T-SQL, PL/SQL, stored procedures, database design, and database performance support.
• Oracle 11g or higher and PL/SQL programming.
• PostgreSQL version 9 or higher.
• TypeScript and Node.js scripting or development experience.
• SQL Server Reporting Services (SSRS) and SQL Server Integration Services (SSIS).
• Microservices architecture experience.
• Cloud hosting, deployment, or development experience with Azure or AWS.