> Markdown version of [/jobs/ext/1339771-middle-office-sr-developer](https://www.wearedevelopers.com/jobs/ext/1339771-middle-office-sr-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Middle Office Sr Developer - **Company:** Connvertex Technologies Inc. - **Location:** New York, NY, United States - **Experience:** Expert - **Salary:** $140,000.0 - $145,000.0 - **Contract:** Permanent contract - **Skills:** .NET Framework, C++ (Programming Language), Software Quality, Computer Programming, Database Design, Financial Information EXchange, Microsoft SQL Server, Software Engineering, Software Systems, SQL Databases, Multithreading, Cloud Platform System, Solid Principles - **Published:** July 18, 2026 - **Apply:** https://www.careerjet.com/jobad/us2d66ff74da793a4bd3d58c67186a8124 ## About the Role * 10+ years of software development experience with demonstrated expertise in C# and .NET * Advanced proficiency in SQL and Microsoft SQL Server; strong understanding of database design and optimization * Expert-level knowledge of multi-threading, async programming, and SOLID principles * Proven experience with FO Trading Platforms, FIX protocol, and capital markets domain (equities, swaps, corporate actions) * Experience working with legacy platform programming and modernization initiatives in financial services * Strong problem-solving skills with the ability to diagnose and resolve complex production issues * Excellent communication skills and ability to work collaboratively across global teams * C++ experience is a plus ## Description Job Description:-Our client is seeking a Senior Developer with 10+ years of experience to lead the design, development, and support of innovative software solutions within a fast-paced capital markets environment on their Middle Office team. Responsibilities & Qualifications * Lead, architect, and develop innovative software solutions; manage design reviews, code quality, and testing standards * Provide Level 3 production support including diagnosis, investigation, and resolution of critical issues; coordinate across development, business, infrastructure, and vendor teams * Follow established deployment processes to implement, test, and configure code changes in production environments * Pro-actively collaborate within a global development team to deliver robust, scalable solutions * Mentor junior developers and contribute to best practices in legacy platform modernization * Design and optimize solutions using multi-threading, async programming, and SOLID architectural principles * Work with Front Office Trading Platforms, FIX protocol, and capital markets instruments including equities, swaps, and corporate actions, + $140,000-145,000 per year ABM is seeking qualified individuals to develop guaranteed energy efficiency projects, renewable energy projects, and other energy savings-related capital improvement projects. 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