Sacha COHEN

Je m'occupe de développer des solutions web pour les petites et moyennes entreprises avec une équipe de développeurs et de commerciaux.

As a senior freelance developer at MetaMundo, i develop and maintain MetaMundo's marketplace. I also maintain and deploy new smart contracts on Ethereum blockchain using Hardhat. Here are somes examples of tasks I do : 👉🏼 Optimize and scale new marketplace features 👉🏼 Deploy new NFTs smart contracts for new products imported on the marketplace 👉🏼 Develop new features

Development of SaaS web application called "Liora". This application is currently used (started from 2021) in many medical center in Marseille. This application is used to easily invoice covid detection test. As the only developer on this project, i built the front-end using Angular. The API is developed with Symfony and PHP. A MySQL database is also used. I configured test, staging and production environment using AWS. I still continue making updates on this app.

As a freelance blockchain developer, I realized this mission for a client that wanted to launch its NFT collection. Here is what I've done : 👉🏼 Develop an ERC721 smart contract 👉🏼 Deploy the smart contract on Mumbai - Polygon Testnet 👉🏼 Deploy the smart contract in production on Polygon 👉🏼 Mint the collection and list it on OpenSea

I worked for an NFT project named "Eye-C". We started from scratch, here is a list of what I developed : 👉🏼 Different smart contracts (more details below) using Solidity and Truffle 👉🏼 The API for the marketplace and users using Symfony 👉🏼 The public marketplace using Vue.js and Nuxt.Js 👉🏼 The back-office for administrators using EasyAdmin 🦊 Blockchain : - Development of an ERC20 smart contract token for the project's cryptocurrency - Development of two NFT ERC721 smart contracts : one for the marketplace, and the other one for others marketplace (like OpenSea) - I developed the smart contracts using the Upgradeable Proxy to be able to update the smart contracts on the blockchain without losing their data 💾 API : - To manage the signup and the login of users - Manage purchase and mint from the marketplace - Management of NFTs - Mail sending 🖥️ Marketplace : - Home page with many animations managed by SVG and SCSS - Listing of NFTs - Purchase and mint of NFTs - Signup/login, forgot password and account update - Use of web3.js to communicate with the blockchain

In a team of 4 developers (lead developer included), we developed a Saas application under NDA. Here are some tasks I performed : 👉🏼 Develop the API using Symfony 👉🏼 Develop the web application using Angular 👉🏼 Participate to daily stand-up and some strategic meetings about new features and the technical way to develop it 👉🏼 Migration from Symfony 4 to Symfony 5

Build the new O2 Toit's website from scratch. - List all agencies on integrated Google Maps view - Schedule an appointment with an agency - Listing of products by category, sub category - Ask for estimates - Blog Developed a back-office - Create/manage new pages - Manage agencies - Manage menu - Manage testimonies Wrote Dev/Ops script : automated deployment, database backup...

Web developer as internship. Worked on Unknown's website: - Ruby on Rails - jQuery - SCSS Client's project: - Vue.js