Quantitative Software Engineer - Expert Systems
About The Position
This role is not a typical software engineering position. It requires combining software engineering, quantitative analysis, financial logic, and AI to build production systems that support complex mortgage and financial operations. The engineer will be responsible for turning complex business knowledge and decision-making into automated system logic, working with large financial and mortgage servicing datasets, and building SQL-based systems, ETL pipelines, APIs, and automated workflows. The role involves applying optimization, simulation, statistical modeling, and operations research to develop solutions related to cash flow, financial models, risk, reconciliation, and exception management. The engineer will automate processes that currently require significant manual analysis and build systems designed for accuracy, validation, traceability, and auditability. Collaboration with developers, operations teams, financial professionals, and subject matter experts is expected, as is contributing to PMSI's proprietary Q™ technology platform. A key aspect of the role involves building expert systems that integrate rules-based logic, quantitative models, and decision-support algorithms into PMSI's technology platforms. The position also offers opportunities to use AI as an engineering tool, including AI coding agents and AI-assisted development tools, for coding, testing, debugging, documentation, and modernization. Building controlled AI/agentic workflows using APIs, data, business rules, and internal systems, as well as validating, testing, and refining AI-generated code, are also part of the responsibilities. The role requires building appropriate controls, monitoring, and human oversight into AI-enabled solutions.
Requirements
- Strong C#/.NET, C++, or comparable object-oriented development
- Strong SQL and/or MongoDB
- Experience with APIs, ETL/data pipelines, automated workflows, and data-intensive applications
- Experience using AI coding agents or AI-assisted development tools
- Knowledge of quantitative analysis, optimization, simulation, statistical modeling, or operations research
- Excellent analytical and problem-solving skills
- Strong professional verbal and written communication
- Ability to explain complex technical concepts clearly
- Comfortable asking questions and working directly with subject matter experts
- Ability to translate business problems into technical solutions
- Strong documentation skills
- Detail-oriented and quality-focused
- Comfortable working in a collaborative, fast-moving environment
- Bachelor's degree in Operations Research, Financial Engineering, Applied Mathematics, Computer Science, Industrial Engineering, or related field
- Typically 3–7 years of relevant experience in software development, quantitative analysis, or analytical technology development
- Demonstrated experience building production-grade systems
- Candidates must be currently authorized to work in the United States
- PMSI does not provide employment-based visa sponsorship for this position, now or in the future
Nice To Haves
- Master's degree in a quantitative field
- Structured finance or mortgage servicing experience
- Financial modeling experience
- Serverless ETL or AI/ML deployment experience
- Experience putting quantitative or analytical methods into real production software
Responsibilities
- Build production-grade software and expert systems
- Turn complex business knowledge and decision-making into automated system logic
- Work with large financial and mortgage servicing datasets
- Build SQL-based systems, ETL pipelines, APIs, and automated workflows
- Apply optimization, simulation, statistical modeling, and operations research
- Develop solutions involving cash flow, financial models, risk, reconciliation, and exception management
- Automate processes that currently require significant manual analysis
- Build systems designed for accuracy, validation, traceability, and auditability
- Work directly with developers, operations teams, financial professionals, and subject matter experts
- Help enhance and expand PMSI's proprietary Q™ technology platform
- Build expert systems that integrate rules-based logic, quantitative models, and decision-support algorithms into PMSI's technology platforms
- Use AI coding agents and AI-assisted development tools
- Apply AI to coding, testing, debugging, documentation, and modernization
- Build controlled AI/agentic workflows using APIs, data, business rules, and internal systems
- Validate, test, and refine AI-generated code
- Build appropriate controls, monitoring, and human oversight into AI-enabled solutions
Stand Out From the Crowd
Upload your resume and get instant feedback on how well it matches this job.
What This Job Offers
Job Type
Full-time
Career Level
Mid Level
