Complex software.
Shipped.

Senior frontend and full-stack consultancy for product teams working across fintech, Bitcoin, geospatial systems and AI infrastructure.

15+ years of hands-on delivery

Discuss a project See selected work

Selected experience

Built where failure gets expensive.

From product discovery through production operations—architecture and delivery stay connected.

Global wildfire intelligence, made actionable.

Built and operate a live wildfire-monitoring and GIS platform combining multiple satellite sources, interactive mapping, location monitoring and meaningful-change alerts.

Frontend
Backend
Geospatial processing
Infrastructure

Payments infrastructure teams can operate with confidence.

Lead frontend architecture and delivery for a Bitcoin and Lightning payments platform used by financial businesses, translating complex requirements into maintainable production systems.

Svelte
TypeScript
Architecture
Product delivery

A Bitcoin brokerage brought from product to production.

Helped bring River’s flagship brokerage to market across frontend, backend and administrative systems, including the mobile GraphQL API and Lightning service-provider dashboard.

React
Elixir
GraphQL
Fintech integrations

Checkout reliability that moved conversion.

Improved checkout and payments platforms using React and Redux.

90%fewer checkout errors

10%increase in checkout conversion

Architecture should survive contact with reality.

Treehouse is a private multi-tenant AI development harness designed and built by João. It operates on shared dedicated infrastructure with separate resource allocations.

170+applications running

Have a hard software problem?

jcsmesquita@gmail.com