The Challenge
PropVault is a real estate fractional investment platform that democratizes access to property investment by allowing investments starting at PKR 25,000. The business model involves complex financial mechanics: fractional ownership records, rental income distribution, property valuation updates, and a secondary market where investors can buy and sell their ownership stakes.
Our Approach
We began with a structured discovery phase to map existing workflows, identify technical constraints, and define the highest-value features for the initial release. Rather than trying to build everything at once, we established a phased delivery plan with working software at each milestone.
What We Built
The core financial logic was built in Python/FastAPI, chosen for its strength in financial calculation and decimal arithmetic precision. All monetary values are stored and calculated using Python's Decimal type with explicit rounding rules — floating-point arithmetic is prohibited in all financial calculations by our internal code review standard.
The secondary market matching engine uses PostgreSQL's serializable transaction isolation level to guarantee atomicity for all order matching operations. A Redis-based queue handles high-frequency order submission without creating database lock contention. Stripe Connect manages investor KYC verification and handles the disbursement of rental income to verified investor accounts on a monthly settlement cycle.
"PropVault handles complex financial transactions that require absolute accuracy. The team's insistence on getting the data architecture right before building anything else was the right call — the platform has processed billions in transactions without a single financial error."
The Results
PropVault launched and immediately attracted significant investor interest, listing PKR 2.4 billion in property value within the first six months. The secondary marketplace — one of the first of its kind for Pakistani real estate — executed 340 trades in its first six months with zero settlement errors.