Contractors List — Commercial Contractor Marketplace & Bidding
The Problem & Bottlenecks
System Bottlenecks & Technical Friction
Project developers and commercial property managers suffered from unreliable subcontractor sourcing, fraudulent credential claims, and lack of transparency during the bid collection phase, resulting in costly job-site delays.
Our Engineering Approach
Architecture Design & Implementation
We engineered Contractors List as an authoritative two-sided marketplace. Built automated verification workflows for state licensing and insurance certificates, interactive Mapbox-powered regional contractor discovery, and private RFP bidding rooms with escrow-backed payments via Stripe Connect.
Technical Architecture
System Subsystem Breakdown.
Mapbox GL geospatial search indexing contractor service radiuses down to exact zip codes
Automated document verification pipeline validating state contractor board license numbers
Private project bidding rooms allowing developers to receive and compare sealed subcontractor bids
Stripe Connect custom onboarding facilitating secure escrow deposits and milestone releases
In-app messaging and file-sharing system keeping all scope communications on the record
Reputation and review scoring system based exclusively on verified completed contract work
Engagement Roadmap
Engineering Delivery Schedule.
Marketplace economics definition, verification workflow design, data modeling
Mapbox geospatial search, contractor profile engine, document upload pipeline
Private bidding rooms, sealed bid submission logic, Stripe Connect escrow
Security testing, contractor onboarding campaign support, national release
More Case Studies
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