AppCrédito Platform
Credit origination, document processing and portfolio operations in one application.
IN PRODUCTION
Python · FastAPI · JavaScript · React · PostgreSQL · REST APIs · Docker · Fly.io · GitHub Actions · CI/CD · Object storage
Operational application
Actual application screens rendered with fictitious demonstration records. The production origination volume highlighted above is separate from the illustrative figures in these screenshots.
THE PROJECT
The problem
Payroll lending brings together customer documents, credit simulations, contract issuance, CRM records and portfolio follow-up. I built a web application to connect these steps for App Crédito.
My contribution
As partner and CTO, I led and implemented the software with AI-assisted development tools, from application workflows and API integrations to deployment and operational controls.
Engineering decision
AI output supports the operator workflow: classification confidence and field validation determine where human review is needed. Banking workflow polling provides the operational status source. Model/provider configuration, reasoning options, fallback layers and circuit breakers support operational resilience.
IMPLEMENTATION
What I built
- React frontend and FastAPI backend for credit simulations, contract issuance, portfolio management and reconciliation.
- Guardian banking API and RDStation CRM integrations, including OAuth token refresh, retry handling and workflow polling.
- Vision-language model pipeline to classify documents and extract structured fields, with validation and operator review for low-confidence classifications.
- Role-based permissions, domain-separated PostgreSQL databases, document downloads and operational deployment on Fly.io.
- Docker deployment on Fly.io, managed PostgreSQL, separate web and worker processes, readiness checks and encrypted backup/recovery workflows.
- GitHub Actions pipelines with path-based checks, job dependencies, test gates, staging/production releases and deployment concurrency controls.
Outcome and current stage
In production at App Crédito, supporting approximately US$600,000 in monthly credit origination — equivalent to a US$7.2 million annualized run rate. The platform connects credit workflows that would otherwise require separate tools and manual handoffs.
Private source repository. Screenshots and selected implementation details are shared without exposing customer records or private code.
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