Residential Loan Trader

Why work for us?

A career at Janus Henderson is more than a job, it's about investing in a brighter future together.

Our Mission at Janus Henderson is to help clients define and achieve superior financial outcomes through differentiated insights, disciplined investments, and world-class service. We will do this by protecting and growing our core business, amplifying our strengths and diversifying where we have the right.

Our Values are key to driving our success, and are at the heart of everything we do :

• Clients Come First - Always
• Execution Supersedes Intention
• Together We Win
• Diversity Improves Results
• Truth Builds Trust

If our mission, values, and purpose align with your own, we would love to hear from you!

We are seeking an experienced quantitative professional to join our residential mortgage whole loan acquisition and portfolio management team. This role will focus on modeling, analytics, and data integration to support trading, structuring, and risk management decisions. The ideal candidate will combine deep mortgage market knowledge with strong quantitative skills to forecast borrower behavior, optimize portfolio performance, and enhance analytical infrastructure.

• Develop and maintain borrower performance models, including default, delinquency, and prepayment curves for pools of residential mortgage loans.
• Create and calibrate S-curves and other behavioral models to capture sensitivity to interest rates, credit attributes, and macroeconomic factors.
• Conduct scenario and stress testing to assess portfolio resilience under varying market conditions.

• Perform levered cash flow modeling for whole loan pools and securitization structures.
• Evaluate relative value across loan cohorts and securitization tranches using tools such as Intex, Yield Book, and internal models.
• Support portfolio managers in trade structuring, hedging strategies, and P&L attribution.

• Manage large, loan-level datasets and ensure data integrity across acquisition, surveillance, and reporting workflows.
• Integrate data into internal systems and visualization platforms such as Snowflake, Power BI, and Tableau.
• Collaborate with technology teams to enhance automation and scalability of analytical processes.

• Track portfolio performance against expectations and market benchmarks.
• Partner with risk management to design and implement hedging programs and monitor exposure metrics (duration, convexity, spread risk).

• Track all recent whole loan market activity and color.
• Stay current on mortgage market trends, regulatory developments, and investor behavior.
• Contribute to research initiatives on borrower behavior, housing economics, and securitization structures.

• Hybrid working and reasonable accommodations
• Generous Holiday policies
• Paid volunteer time to step away from your desk and into the community
• Support to grow through professional development courses, tuition / qualification reimbursement and more
• Maternal / paternal leave benefits and family services
• Complimentary subscription to Headspace - the mindfulness app
• Corporate membership to Class Pass and other health and well-being benefits
• Unique employee events and programs including a 14er challenge
• Complimentary beverages, snacks and all employee Happy Hours

• Education:
  
  Master's or Ph.D. in a quantitative discipline (Finance, Economics, Statistics, Mathematics, Physics, Engineering, or related field).
• Experience:
  
  Minimum 5 years in mortgage analytics, quantitative research, or portfolio modeling within an asset manager, hedge fund, bank, or rating agency.
• Technical
  
  Skills:
  
  Proficiency in cash flow modeling and loan-level analytics; advanced knowledge of Intex, Yield Book, and other mortgage analytics platforms; strong programming skills in Python, R, or SQL for data manipulation and model development; familiarity with Snowflake, Power BI, and Tableau for data integration and visualization.
• Domain Expertise:
  Deep understanding of residential mortgage products (Prime, Non-QM, Jumbo,…