TOPS-DoIT-Senior .NET Developer (MSF&W)

Job Title: Senior .NET Developers

Work Location: Hybrid - 1 or 2 days per week.

Client/Agency: Illinois Department of Information Technology

Project Name: Payroll Time Keeping Project Support

Employment Type: Full-Time

No of FTE//'s: 2

Duration: 2000 Hours Each FTE

Position Overview

We are seeking a highly skilled Software Developer responsible for the design, development, testing, and maintenance of robust, scalable, and secure software applications. The ideal candidate will have strong hands-on experience across the .NET technology stack, relational databases, and modern web technologies, and will collaborate closely with cross-functional teams to deliver high-quality business solutions aligned with organizational standards and best practices.

Key Responsibilities

Application Design & Development

Design, develop, and enhance enterprise-grade software applications using .NET technologies (ASP.NET, C#, Web APIs). Build scalable, maintainable, and reusable application components following object-oriented and layered architecture principles. Develop responsive and user-friendly web interfaces using HTML, CSS, and JavaScript. Implement business logic, data access layers, and service integrations to support complex functional requirements. Database Development & Integration

Design, write, and optimize SQL queries, stored procedures, views, and functions to support application functionality. Ensure data integrity, performance, and security across relational databases. Collaborate with database administrators and architects to support data modeling and performance tuning efforts. Testing & Quality Assurance

Perform unit testing, integration testing, and system testing to ensure application stability and reliability. Identify, troubleshoot, and resolve software defects and performance issues. Support User Acceptance Testing (UAT) and address feedback to ensure business requirements are fully met. Collaboration & Agile Delivery

Work closely with business analysts, project managers, QA teams, and other developers to translate requirements into technical solutions. Participate in Agile/Scrum ceremonies including sprint planning, daily stand-ups, reviews, and retrospectives. Contribute to technical design discussions, code reviews, and continuous improvement initiatives. Maintenance & Support

Provide ongoing application maintenance, enhancements, and production support. Analyze existing applications and recommend improvements for performance, scalability, and security. Ensure adherence to coding standards, documentation guidelines, and organizational development policies. Required Technical Skills

Strong experience with .NET technologies (C#, ASP.NET, Web APIs). Proficiency in SQL and relational database concepts. Hands-on experience with HTML, CSS, and JavaScript for front-end development. Solid understanding of software development lifecycle (SDLC) and best practices. Experience in debugging, testing, and optimizing application code. Ability to work independently while effectively collaborating with cross-functional teams. Preferred Qualifications

Experience with modern JavaScript frameworks or libraries. Familiarity with RESTful services and API integrations. Exposure to source control systems (Git, Azure DevOps, or similar). Understanding of application security principles and performance optimization techniques. Experience working in Agile or DevOps-oriented environments. Soft Skills & Competencies

Strong analytical and problem-solving skills. Excellent written and verbal communication abilities. Ability to manage multiple priorities and meet project deadlines. Detail-oriented with a strong commitment to quality and continuous improvement.