Hi, I'm Benjamin Merchin.
Full-stack software engineer.
Thinking, learning, building. I'm an École 42 graduate and CTO at Dalta.ai, building fast, reliable products end to end with TypeScript, React and Node.js — from database schemas to polished interfaces. Freelance, remote-friendly, and ready to ship your next idea.
- 42
- École 42 graduate
- CTO
- at Dalta.ai
- Paris
- based, remote-friendly
What I do
One developer, the whole stack. I cover everything you need to take a product from concept to launch.
Frontend Engineering
Polished, accessible interfaces with React, React Native and Next.js. Fast, responsive products that feel great on web and mobile.
Backend & APIs
Typed REST and GraphQL APIs, auth, payments and integrations built on Node.js, NestJS, Express and PostgreSQL.
Full Stack Delivery
From idea to production — architecture, database design, Docker and deployment. I own features end to end as a freelancer and CTO.
Selected work
A few things I've built — from a startup I lead as CTO to open-source projects on GitHub.
Dalta.ai
Co-founder and CTO, leading product engineering and architecture end to end across a modern TypeScript and React stack.
exam42
A training tool for the École 42 Common Core exams, recreating the exam environment so students can practice under real conditions.
matchnsolve
A curated directory of personal-development solutions, matching people with the resources and tools that fit their goals.
cub3D
A Wolfenstein 3D–inspired raycasting engine written in C, exploring real-time graphics and low-level rendering.
About me
I'm a full-stack software engineer based in Paris and a graduate of École 42. Today I'm CTO at Dalta.ai and have built products with the team at Galadrim, owning features from the data layer to the final pixel.
I've gone deep on the fundamentals — from low-level C projects like a Unix shell and a raycasting engine at 42, to typed full-stack apps in TypeScript, React, NestJS and PostgreSQL. I care about clean architecture, performance and shipping on time: clear communication, no surprises, and code you can build on.
Let's build something great
Have a project in mind or just want to talk shop? I'm currently taking on new freelance work. Drop me a line and I'll get back to you within a day.