Services Center Mid/Senior .NET Software Developer

About Mortgage Cadence Mortgage Cadence delivers enterprise-grade loan origination software that powers some of the most respected lenders in the mortgage industry. Our platform handles complex, high-volume workflows across the full origination lifecycle, and we are continually modernizing it to meet the demands of a dynamic market. Join a team where the code you write directly impacts how millions of borrowers finance their homes. Position Overview We are looking for a Mid/Senior .NET Software Developer to join the team behind Services Center, our non-interactive integration hub that connects the loan origination system to a wide ecosystem of third-party vendors and services. Services Center operates entirely in the background—it has no user-facing interface—and its core mission is reliable, accurate data exchange: translating loan origination data into vendor-specific formats, managing outbound and inbound communication with external APIs and services, and handling the mapping and transformation logic that keeps the platform in sync with its partners. You will design and maintain the integration layer that lenders and vendors depend on, working through vendor specifications, building robust data pipelines, and ensuring every handoff between systems is precise and traceable. You’ll operate within a small Agile team and collaborate closely with product, QA, and senior engineers to ship dependable software at enterprise scale. Key Responsibilities Design, develop, test, and maintain integration features within the .NET-based Services Center, including service connectors, data transformation pipelines, and vendor-facing APIs. Write clean, well-tested C# code and contribute thoughtful peer code reviews. Build and maintain efficient SQL Server queries, stored procedures, and data models, with emphasis on the mapping and transformation schemas that underpin vendor integrations. Implement and maintain integrations with third-party vendors by interpreting vendor specifications and ensuring accurate bidirectional data exchange. Diagnose and resolve defects across various environments. Partner with senior engineers on integration design and architecture; contribute ideas on reliability, retry patterns, error handling, and observability for non-interactive services. Contribute to documentation (including integration specs and data mapping references), automated testing, and continuous improvement of the engineering process. Required Qualifications 5+ years of professional software development experience on the Microsoft technology stack. Proficiency in C# and the .NET framework / .NET Core. Solid experience designing and consuming web APIs and working with external vendor specifications to implement reliable data exchange. Working knowledge of SQL Server, including writing performant queries and stored procedures. Demonstrated ability to work independently as a self-starter and drive tasks to completion. Experience working in Agile team structures. Strong problem-solving, communication, and collaboration skills. Preferred Qualifications Experience building or maintaining distributed, high-throughput systems where reliability and performance are non-negotiable. Demonstrated experience with performance profiling, optimization, and tuning—whether at the application, query, or system level. Hands-on experience implementing third-party vendor integrations, including interpreting API documentation, handling authentication schemes, and managing field-level data mapping. Exposure to Redis for caching and distributed data. Experience developing and deploying workloads on Microsoft Azure. Experience contributing to large enterprise applications. What You'll Bring Curiosity and a willingness to dig into unfamiliar parts of a large codebase. A self-starter attitude—you can take a story and run with it, asking the right questions along the way. Care for craft: readable code, sensible tests, and thoughtful design. Disclaimer: HeadSpin does not charge any fees at any stage of the recruitment or selection process. We will never ask candidates to pay money or share financial information in exchange for a job offer. If you receive any communication requesting payment on behalf of HeadSpin, please treat it as fraudulent and report it immediately to