Tsitohaina Kantonirina

Full-Stack Developer & Infrastructure Lead · Independent Contractor

• Took an e-learning platform from zero to 7,000 daily active users, handling everything from Next.js code to GCP infrastructure.
• Built a lead generation engine (scraping, automated offers, notifications) that measurably increased the client's enrollment rate.
• Ran two parallel remote teams of 5 across different codebases, keeping both shipping without stepping on each other.

Next.js · Node.js · PostgreSQL · Vitest · GCP · Cloudflare R2

Full-Stack Developer · Independent Contractor

• Built a crypto trading platform from scratch with real-time market data, live chat, and multi-exchange support via CCXT and WebSockets.
• Redesigned the legacy UI into a clean, responsive interface that traders actually wanted to use day-to-day.
• Integrated order book visualization, trade history feeds, and portfolio tracking across multiple exchanges into a single dashboard.

Next.js · Node.js · MongoDB · Vitest · CCXT · WebSockets

Full-Stack Developer · NOGAE

• Built a GIS platform from the ground up for mapping environmental risk zones (floods, erosion, cyclone paths) across Madagascar.
• Implemented polygon drawing, geospatial queries via PostGIS, and tile rendering through GeoServer for smooth map interactions at any zoom level.
• Delivered government-grade validation workflows with overlap detection, minimum area rules, and an approval pipeline for official zone records.

Laravel · Vue.js · PostgreSQL · PostGIS · GeoServer