Sr Software Engineer

Title: Contract Software Engineer (C# / .NET) Enterprise SystemsJob Type: ContractContract Length: Through End of YearPay Range: $75-120/hrStart Date: ASAPLocation: Hybrid- Walpole, MAAbout The OpportunityOur client, a leader in Investment Banking, is looking for a skilled Contract Software Engineer (C# / .NET) to join their team for a Through End of Year engagement. This is a contract backfill role designed to free up senior engineers for AI and R&D initiatives. This project involves the cleanup, stabilization, and completion of existing enterprise systems, focusing on improving codebases and supporting a transition toward more modern architecture. This is a high-impact role that requires a strong executor who can ramp quickly, operate with minimal oversight, and deliver results quickly.Key Responsibilities & Deliverables:This role is focused on the successful completion of specific tasks and deliverables. Your responsibilities will include:Maintain and enhance existing enterprise applications built in C# / .NET.Refactor and clean up legacy or partially completed code to improve maintainability.Support ongoing system improvements and modernization efforts.Troubleshoot and resolve production issues to ensure system stability.Collaborate with senior engineers to offload tactical work and improve team velocity.Required Skills & Experience:We Are Looking For a Mid-to-senior Level Engineer (5–10+ Years) With a Proven Track Record Of Successful Contract Engagements. The Ideal Candidate Will Have5+ years of experience in software engineering.Deep expertise in C# / .NET (Core preferred). This isn't a learning role—you need to be a subject matter expert.Solid understanding of SQL Server and data-driven applications.Experience working effectively in existing/legacy codebases and comfortable working on non-greenfield systems.Demonstrated ability to independently execute and deliver clean, maintainable code with minimal oversight.Comfortable working in Agile environments.Nice to Have:Exposure to financial systems or enterprise workflows.Experience supporting modernization or migration initiatives.Familiarity with cloud environments (AWS is a plus, not required).