Hey, I'm

Yannis

Full-Stack Developer

I build scalable web applications with React, TypeScript, Node.js, and React Native—from backend APIs and serverless functions to frontend and mobile. 5+ years across MedTech, E‑commerce, and Web3. ETH Denver 2023 winner. From Antibes, France; based in Stockholm, Sweden.

Tech I enjoy building with

HTML5
CSS3
JavaScript
TypeScript
React
Next.js
Node.js
Git
MySQL
SASS
Bootstrap
Tailwind
MaterialUI
Solidity
GraphQL
Redux
Gatsby
Azure
Supabase
Vercel
Claude

The timeline of my developer journey

  1. BabyBjörn — Fullstack Developer (2024 – now)

    Full-stack development for the e-commerce platform: backend APIs, serverless architecture, and frontend features. Organized and led a company-wide hackathon. Tech: React, TypeScript, Node.js, Next.js, Gatsby, Azure Functions, Adyen, Express, REST APIs.

  2. Anotherblock

    Built the frontend for a music NFT marketplace—integrating Ethereum smart contracts with ethers.js and GraphQL for real-time on-chain data.

    ETH Denver — DAO & Community track winner

    Won the DAO & Community track at ETH Denver (600+ teams). Built a knowledge management tool with Notion-like commands for on-chain data.

    Bonsai pivot to portfolio tracking

    Pivoted Bonsai into a unified portfolio dashboard: track crypto, stocks, real estate, and collectibles in one place with automated sync and real-time insights.

  3. Bonsai Finance pre-alpha

    Launched app.bonsai.finance as a Web3 dashboard for Ethereum assets and NFTs. Later evolved into Bonsai—a portfolio tracker for crypto, stocks, real estate, and collectibles at bonsai.finance.

  4. SALT Full-Stack Bootcamp

    3-month full-stack JavaScript bootcamp in Stockholm—mob programming, modern frameworks, agile—graduated ready for production.

    Podme internship

    Built a React/Redux admin dashboard for podcast analytics so creators could track listener stats and engagement.

    Redmind internship

    First dev internship: built a React Native app and got hooked on mobile development.

    Mindler — first full-time role

    Joined as one of the first three developers at the med-tech startup. Worked across React, Node.js, and React Native; led the psychologist dashboard for 200+ professionals; helped scale the team to 20+ engineers.

  5. OnChain Jobs

    Co-founded OnChain Jobs with a childhood friend to connect blockchain companies with developers. Built the product while learning JavaScript.

  6. Smart contracts & first steps in code

    After buying my first NFT, I saw the potential of Ethereum and smart contracts. Taught myself programming and built HashDrop, a site that tracked token launches.

  7. Born in Antibes

    I was born in January 1990 on the French Riviera.

Contact Me

Get in touch via this form or contact me directly at hello@yannis.dev