Full-Stack Engineer
Available for workTsitohaina Kantonirina
I'm a full-stack engineer based in Antananarivo, Madagascar. I've spent the last 4+ years building web applications across e-learning, fintech, healthcare, and SaaS, mostly with TypeScript and Next.js, deployed on GCP and Vercel.
I prefer working remote and async. Mornings are for deep work: architecture, complex features, code reviews. Afternoons for collaboration, syncs, and helping teammates unblock. I care about shipping things that actually work for users, not just things that look good in a PR.
When I'm not coding, I'm probably behind a wheel, or a sim wheel. I'm into cars, driving, and racing simulators. It's the same thing I like about engineering: precision, feedback loops, and getting faster every lap.
4+
Years Shipping Production Systems
7k
Peak Daily Users Served
10+
Developers Managed
5
Industries
Selected Work
Experience
Lead Full-Stack Developer · Genius-At-Work, Madagascar
- Architecting a B2B SaaS platform that replaces paper-based workflows for construction enterprises with a visual, drag-and-drop automation engine.
- Built an LLM-powered document extraction pipeline that pulls structured data from scanned invoices and permits at 95%+ accuracy.
- Leading a team of 5, owning technical direction and translating messy domain problems into shippable features.
Next.js / TypeScript / Tailwind / tRPC / Vitest / Inngest / LangChain
Full-Stack Developer & Infrastructure Lead · Independent Contractor, Paris
- 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, Paris
- 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, Madagascar
- 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
Full-Stack Developer · MEDDoC, Madagascar
- Shipped patient-to-doctor matching features with availability filtering, specialty search, and location-based recommendations.
- Reworked the appointment booking flow end-to-end, reducing steps from five screens to two and cutting drop-off rates.
- Worked across the full stack with React on the frontend and Spring Boot APIs backed by PostgreSQL.
React / Spring Boot / PostgreSQL
Stack
Frontend
- Next.js
- React
- TypeScript
- Tailwind CSS
- Vue.js
Backend
- Node.js
- tRPC
- GraphQL
- Laravel
- Spring Boot
Data
- PostgreSQL
- MongoDB
- Redis
Infrastructure
- GCP
- Cloudflare R2
- Vercel
- Linux
Testing
- Vitest
- Playwright
- Testing Library
Education
Master's in Computer Science
Institut Supérieur Polytechnique de Madagascar
Bachelor's in Computer Science
Institut Supérieur Polytechnique de Madagascar