dot net developer

Sr.Net Developer Location: Carrollton, TX (North Dallas) 6 month Contract to Hire Visa: GC or USC Interview Process: NET Codility / CoderPad Coding Challenge Onsite Panel Interview – either at a TEKsystems office or at a PennyMac Location What the Client Is Doing & Why This Role Is Needed Modernizing legacy servicing platforms to.NET Core and AWS to improve scalability, performance, and reliability. A lot of internal applications. Super heavy backend - head down Needs hands-on senior engineers who can ship production-grade code end-to-end, handle user-reported issues, and own smaller projects independently to keep modernization timelines moving. What They're Truly Looking For (Beyond Listed Skills) Ownership + Delivery: Someone who can take a problem from definition to production and support with minimal oversight. Practical cloud fluency: Not just AWS buzzwords—real experience deploying, integrating, and troubleshooting in AWS. Full-stack pragmatism: Comfortable jumping between API/backend work, SQL tuning/SSIS, and front-end fixes when needed. Production support mindset: Calm under pressure with a bias for quick, reliable fixes and iterative hardening. Quality engineering habits: Unit testing, refactoring, design patterns, and readiness for code reviews. AI-accelerated development: Comfortable and effective using AI coding tools (e.g., GitHub Copilot) to increase velocity while maintaining quality. Communication & stakeholder handling: Can interact with users and teams to clarify issues, manage expectations, and document clearly. Key Responsibilities Build and maintain.NET Core/C# services and Web APIs; contribute to front-end (JS/HTML/CSS) as needed. Design, write, and optimize SQL (SQL Server primarily; SSIS packages where applicable). Prepare and deploy software to production; support CI/CD and containerized workloads in AWS. Respond to user tickets for a live system; debug, resolve, and prevent regressions. Manage small projects independently; collaborate on larger initiatives using