Senior .NET Developer @ CGI

Senior.NET DeveloperCGI is seeking an experienced Senior.NET Developer to join our Applications Development and Maintenance team supporting a large metropolitan client's IT Application environment. This role offers the opportunity to work in a sophisticated, enterprise-scale technology environment and contributes to the development, modernization, and ongoing support of critical business applications.Location: Candidates should reside within commuting distance of one of our CGI offices in Wausau, WI; Lafayette, LA; Belton, TX; Knoxville, TN; Mobile, AL; Troy, AL; Lebanon, VA; or Henderson, NV.Work Model: Hybrid preferred. Remote work may be considered for highly qualified candidates.Your future duties and responsibilities:Design, develop, test, implement, and support enterprise web applications using the .NET platform, C#, and ASP.NETTranslate business and technical requirements into scalable, secure, and maintainable software solutionsServe as a technical subject matter expert for assigned solutions and act as a key point of contact between vendors and the development team to resolve complex technical issuesParticipate in project planning and requirements-gathering sessions with technical and functional leads, business analysts, and other stakeholders to analyze business needs and define proposed IT solutionsDevelop technical specifications and contribute to application architecture, system design, data flow, and integration strategiesParticipate in design and architecture reviews, ensuring solutions align with established technical standards and architectural specificationsIncorporate security requirements and industry best practices into application design and developmentParticipate in code reviews to ensure code quality, maintainability, security, and adherence to development standardsTroubleshoot and resolve complex application and code-related issues in collaboration with QA and other technical teamsProvide hands-on technical guidance, coaching, and mentoring to senior and junior developers throughout all phases of the project lifecycleAct as an independent technical advisor on complex phases of system design, programming, implementation, integration, and analysisLead or contribute to major system design, development, modernization, and implementation initiativesGather and analyze system requirements, develop technical specifications, and write software in accordance with established standardsPerform quality reviews of code and technical designs and support continuous improvement of development practices and processesCollaborate effectively with cross-functional teams in a multidisciplinary and fast-paced environmentRequired qualifications to be successful in this role:5+ years of hands-on software development experience, with a focus on developing enterprise web applicationsStrong understanding of the Software Development Life Cycle (SDLC), including requirements and issue management, defect tracking, source control, build and test automation, and release managementGeneral technical application support experience with a solid understanding of enterprise IT concepts, including application troubleshooting, infrastructure, networking, operating systems, and databasesProven experience designing and developing applications using the .NET platform, C#, and ASP.NETDemonstrated experience with TFS/Azure DevOps Server, JIRA, Confluence, or similar development and collaboration toolsStrong knowledge of software version control concepts and change management processesStrong understanding of data modeling principles and relational database conceptsHands-on database experience with Microsoft SQL Server (T-SQL) and/or MySQLWorking knowledge of software architecture and development patterns, including MVC, MVVM, Domain-Driven Design (DDD), Test-Driven Development (TDD), and CI/CDStrong understanding of authentication, authorization, and application security conceptsExperience developing and integrating web services and APIsExperience with front-end development technologies, including jQuery, CSS, and HTML5Experience conducting application security code reviews and/or application vulnerability assessmentsStrong written, verbal, and interpersonal communication skillsDemonstrated ability to learn, adopt, and implement new technologies based on evolving client and business needsAbility to work effectively in a rapidly changing environment while managing priorities, meeting deadlines, maintaining high-quality standards, and responding flexibly to customer needsFamiliarity with modern AI-assisted software development and coding platforms, such as Claude Code, GitHub Copilot, or ChatGPT CodexMinimum Education Required: Associate degree in Computer Science, Information Technology, Engineering, or a related field, or equivalent combination of education and professional experience.Skills: .NET, Application Design, C#, Problem Solving, Requirements Analysis, SQL