Tsitohaina Kantonirina

Full-Stack Engineer & Technical Lead

I build production systems that scale — SaaS platforms, trading tools, GIS, and automation infrastructure. 4+ years shipping end to end.

tsitohaina.pro@gmail.comLinkedInGitHubResume

About

I'm a full-stack engineer and team lead based in Antananarivo, Madagascar. I've spent the last 4+ years building web applications across e-learning, fintech, healthcare, and GIS — 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.

Experience

Mar 2025 — Present

Lead Full-Stack Developer · Genius-At-Work, Madagascar

  • Lead architecture and development of a large-scale B2B SaaS platform for end-to-end management of BTP enterprises.
  • Built a homemade n8n-like workflow engine with LLM-powered data extraction, enabling non-technical users to automate complex processes.
  • Supervise and mentor a team of 5 developers; translate complex domain requirements into clear, actionable tasks.

Next.js / TypeScript / Tailwind / tRPC / Vitest / Inngest / LangChain

Jan 2024 — Dec 2024

Full-Stack Developer & Infrastructure Lead · Independent Contractor, Paris

  • Built an e-learning platform serving 3,000–7,000 daily users; handled full infrastructure on GCP.
  • Developed a lead generation and automation suite — mass scraping, automated offer publication, notification systems — that directly boosted client sales.
  • Managed two parallel remote teams of 5 developers each across different projects.

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

Aug 2023 — Dec 2023

Full-Stack Developer · Independent Contractor, Paris

  • Built a crypto trading platform from scratch; redesigned a legacy UI into a clean, modern interface.
  • Integrated multiple exchange APIs via CCXT and implemented real-time trading data and chat using WebSockets.

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

Jun 2022 — Dec 2022

Full-Stack Developer · NOGAE, Madagascar

  • Built a Google Maps-like GIS platform from the ground up to map and register environmental risk zones across Madagascar.
  • Implemented interactive zone tracing, geospatial data rendering, and map features.

Laravel / Vue.js / PostgreSQL / PostGIS / GeoServer

Feb 2022 — May 2022

Full-Stack Developer · MEDDoC, Madagascar

  • Built features connecting patients to healthcare professionals; improved UX flows across the app.

React / Spring Boot / PostgreSQL

Projects

Workflow Automation Engine

Open-source visual workflow builder inspired by n8n. Drag-and-drop node editor with support for conditional logic, webhooks, and scheduled triggers.

TypeScript / React / Node.js / PostgreSQL

DevLog

Minimal CLI tool for developers to log daily progress, tag entries, and generate weekly summaries. Ships as a single binary.

TypeScript / Node.js

Tanà Transit

Real-time public transport tracker for Antananarivo. Crowdsourced vehicle positions displayed on an interactive map.

Next.js / PostGIS / WebSockets / Leaflet

Rekon

Personal finance dashboard that aggregates bank transactions, categorizes spending, and surfaces monthly trends. Mobile-first PWA.

Next.js / TypeScript / PostgreSQL / Chart.js

Markdown CMS

Headless CMS backed by a Git repo of Markdown files. Content API with full-text search, image optimization, and webhook-based deploys.

Node.js / TypeScript / SQLite / Cloudflare R2

Velona

Self-hostable status page and uptime monitor. Checks HTTP endpoints on a cron schedule, stores latency history, and sends alerts via webhook and email.

Node.js / TypeScript / PostgreSQL / WebSockets

Stack

Frontend

  • Next.js
  • React
  • TypeScript
  • Tailwind CSS
  • Vue.js

Backend

  • Node.js
  • tRPC
  • GraphQL
  • Laravel
  • Spring Boot

Data

  • PostgreSQL
  • PostGIS
  • MongoDB

Infrastructure

  • GCP
  • Cloudflare R2
  • Vercel
  • Linux

Testing

  • Vitest
  • Playwright
  • Testing Library

Education

2022 — 2024

Master's in Computer Science

Institut Supérieur Polytechnique de Madagascar

2019 — 2022

Bachelor's in Computer Science

Institut Supérieur Polytechnique de Madagascar