Full-Stack Engineer
Available for workTsito/tsi.tu/haina Kantonirina
I build the systems behind the product. Over the past 4 years I've taken projects from empty repos to thousands of daily users: an e-learning platform on GCP, a workflow engine with LLM extraction, a GIS tool used by government agencies. TypeScript and Next.js are my defaults, and I use LLMs and automation daily, both as dev tools and as features I ship into products.
I work best remote and async, but I don't hide behind Slack messages. I'll sketch an architecture in a Loom, pair on a hard bug over a call, or write the RFC that saves three meetings. What I won't do is ship something I haven't tested against real usage.
Outside of code, I'm usually behind a steering wheel, or a sim wheel. I play WRC and tinker with car setups the same way I tune systems: change one variable, measure, repeat. It's the same feedback loop, just sideways on gravel.
4+
Years shipping production code
50K+
End users across shipped products
6+
Industries built products for
99.9%
Avg uptime on production systems
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.
- Managed a team of 5 split into two groups, AI and full-stack development, keeping both aligned and shipping without blocking 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
- TypeScript
- React
- Next.js
- Tailwind CSS
- Vue.js
Backend
- Node.js
- tRPC
- GraphQL
- Laravel
- Spring Boot
Data
- PostgreSQL
- Redis
- MongoDB
AI & Automation
- Claude Code
- OpenAI
- LangChain
- n8n
Infrastructure
- GCP
- Vercel
- Cloudflare R2
- 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