Senior.NETEngineer(Contract)

About us: Working at Tech Holding isn't just a job, it's an opportunity to be a part of something bigger. We are a full-service consulting firm that was founded on the premise of delivering predictable outcomes and high-quality solutions to our clients. Our founders and team members have industry experience and have held senior positions in a wide variety of companies – from emerging startups to large Fortune 50 firms – and we have taken our combined experiences and developed a unique approach that is supported by the principles of deep expertise, integrity, transparency, and dependability. The Role: We are looking for a Senior .NET Engineer for a project assign, to maintaining, fixing, and improving a suite of enterprise applications for a high-profile entertainment industry client. This role requires a seasoned engineer who is comfortable navigating complex codebases and someone who can diagnose issues quickly and deliver pragmatic, stable solutions. Key Responsibilities: Maintain, debug, and enhance a portfolio of desktop and web applications across multiple technology generations Triage and resolve production issues in WinForms-based desktop apps and API/middleware services Collaborate with client stakeholders and cross-functional engineering teams to understand business requirements Refactor and improve code where appropriate without disrupting existing functionality Document findings, workarounds, and architectural decisions for knowledge transfer Support integrations between systems and API layers Requirements: 5+ years of professional software development experience Strong proficiency in VB.NET and C# (7.x / 8.x) Hands-on experience with .NET Framework (4.0, 4.5, 4.8) and .NET Core (3.1+) Experience building or maintaining REST APIs and middleware services Ability to work independently in unstructured, codebases with minimal documentation Nice to have: Familiarity with WinForms desktop application development Exposure to Angular (v6, v9, or v12) for understa