Senior Full Stack TypeScript

Harison

BuildScaleImpact

6 years of experience

The senior who turns your idea into a production-ready product.

From MVP to production — for startups that need to move fast without compromising quality.

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Missions & projects

Fintech, HealthTech, GreenTech, e-commerce — senior ownership, client names anonymized.

Products

GreenTech
Senior Developer
Ongoing · US company · Remote
GreenTech serverless apps (AWS / React / GraphQL) for a US client.
AWS · React · GraphQL · Serverless
HealthTech
Senior Full Stack Developer
2023 – present · French startup · Remote
Health product on AWS serverless — React, GraphQL, Material UI.
AWS · React · GraphQL · Material UI · Serverless
E-commerce · Zion
Founder · CEO & CTO
2021 – present · Team of 10
E-commerce startup: product vision + microservices architecture (Next.js, NestJS, gRPC, PostgreSQL).
Next.js · NestJS · GraphQL · gRPC · PostgreSQL · Docker
Sales forms
Full Stack Developer
US company · Remote
Critical sales flows and forms on AWS serverless.
AWS · React · GraphQL · Serverless
Fintech · Banking
Lead Full Stack Developer (Back, Front, Mobile)
2020 – 2023 · French startup
Event-driven banking platform with microservices (NATS). End-to-end ownership of the technical product.
React · GraphQL · Apollo Server · PostgreSQL · Docker · NATS
Accounting tools
Senior Front-end Developer
1 year · French startup
Business-critical React interfaces for accounting software — clear UX, Redux state management.
React · Sass · Redux

Stack & skills

TypeScript end to end — front, back, AWS cloud.

Certification · AWS Certified AI Practitioner

Architecture

Monolithe
Microservices
Serverless
Event-driven

Languages

TypeScript
JavaScript
Rust
PHP

Front-end

React
Next.js
Redux
Material UI
React Native
Storybook

Back-end

Node.js
NestJS
Express
Fastify
GraphQL
REST
Apollo Server

Data

PostgreSQL
MySQL
MongoDB
Prisma
TypeORM
Redis
Elasticsearch
Qdrant

Cloud & DevOps

AWS (Amplify, S3, CloudFront, AppSync, Cognito, DynamoDB, EC2, SES)
Docker
GitHub Actions
GitLab CI
Vercel

Messaging & observability

NATS
RabbitMQ
gRPC
Socket.io
Jaeger

Communication & Project management

Slack
Discord
Telegram
Jira

AI & AI agents

RAG
MCP
Agents IA
Cursor
Claude Code
Hermes (agent autonome)

Design & UI

Figma
Miro

Freelance for startups

I take you from MVP to a stable product in production.

Availability

Available for freelance, especially startups

Lead & senior on Fintech, HealthTech, GreenTech
AWS serverless, microservices, GraphQL architectures
Clear founder ↔ engineering communication

Connect on LinkedIn

Contact

An idea, a brief, a question — I reply fast.