02 / The Work
Mortgage Lease Management Platform
Lease Management Platform · v1.0 Shipped · v1.5 Led Solo · v2.0 In Discussion
Built At Antz →The Problem
A lease management platform for a long-term US mortgage client: rent runs, lease payments, holdover, recurring costs, all the moving parts their team touches daily. Mortgage is my main domain, and this client has stayed with us. I came in on v1.0 as part of the build team, learned the lease domain by shipping it, then took v1.5 end to end on my own.
The Decisions
Learned The Domain By Shipping v1.0
Lease accounting isn't intuitive. I picked it up by building the first version with the team, not by reading a spec and hoping.
Owned v1.5 Solo
Support and enhancements ran through one accountable person instead of a shared queue. Issues close faster when someone actually owns them.
Chased The Database Connection Leaks
Explicit connection handling and pool monitoring, not a restart cron papering over the symptom.
Translation, As Much As Engineering
Half the job was turning engineering into something the client's product side would sign off on.
How It Works
- 01It's the system the client's team runs on: leases, rent runs, payments, holdover, recurring costs, account coding.
- 02FastAPI and SQL Server on the back, a React front end, Entra sign-on, shipped through Azure Pipelines.
- 03v1.0 I built alongside the team. v1.5, support plus enhancements, was mine end to end.
- 04v2.0 is in discussion now: what it should become, and what that's worth building.
High-Level Design
The Outcome
v1.5 support and enhancements shipped and stable in production. v1.0 was a team build; v1.5 I led solo. v2.0 is under discussion.
39 tables · access via SQLAlchemy ORM
v1.0 With The Team. v1.5, Just Me.