BENOIT MREJEN

• Built MVPs and apps in fintech, edtech and media using React, NestJS and Typescript • Focused on clean code, TDD, scalable microservices with Docker and AWS. Selected projects - Markeyz: crypto arbitrage trading bot (NestJS, Solidity, Hardhat): 4-node cluster on Uniswap/Sushiwap - Xingzhi High School: automated teacher scheduler – reduced planning from 2 hours to 1 minute (Google Scripts) - Random Bookmark: a Google Chrome extension (Typescript), 5* ranking - Bonfire: a Wechat mini-app for elderly storytelling (WXJS, WXML, Ruby on Rails, Postgres) - Black Jets: A flight-sharing platform for private aviation (Ruby on Rails) - pSync: a desktop backup and syncing app with cloud services (PowerShell, Bash) YouTube channel (300+ videos) - Built and documented fullstack apps (React, Typescript, NestJS). Emphasized clean architecture and testing Mentorship & Training - Taught 100+ students via OpenClassrooms, Le Wagon & DevInstitute - Delivered 30 hours of recorded content and live code reviews. - Mentored in English, French, Russian, and Chinese

• Built and scaled web apps in React and NestJS with a microservices architecture. • Ran CI/CD deployments across staging and production • Participated in backend system design with an API-first approach • Implemented TDD best practices to increase test coverage Stack: React, MUI, NestJS, MongoDB, PostgreSQL, RabbitMQ, Traefik, Datadog, AWS, Storybook,

Marco Vasco (travel agency), Shanghai, China • Built a responsive frontend and backend from scratch • Cut user onboarding time from 30 minutes to 2 (98% faster) by automation • Integrated CRMs (Jamespot, SugarCRM, Google Apps, Google IAM) for live sync • Owned full project lifecycle, sped up performance by 40% Stack: Angular, PHP, Zend, Express, NestJS

Autopia - greentech project marketplace for governments • Launched €100K greentech startup operations in China; handled legal, regulatory, and ops setup. • Built ties with local governments; sourced 10+ prospects for clean energy projects. • Led BD efforts and partnership talks in Shaoxing and nearby cities.

Advent Consulting – brand/media analytics • Opened BD pipeline with SAIC, BYD & others for Automotive Barometer product. • Localized media analytics by mapping China’s auto press landscape. • Delivered bilingual pitches, increasing Asia-Pacific interest by 20%.

As the only person speaking Russian and Chinese, I helped the development of Yandex in China through SEO and SEA workshops for Chinese teams.

I assisted the coordination of the consulting companies Accenture, CapGemini and Logica on the project of unifying the IT platforms of the country's national energy distributor. Project: assembling all of its platforms into a central one, more adapted to the newly liberalized energy market in Europe and compatible with the future innovations Timespan: 3 years Budget: 20 million euros Project staff: 150 people

• Developed sales & leasing of cost-reducing document management systems to multinational companies in Moscow. • Context of financial crisis and market monopolized by competitor • Income generated: $0.504 million. • Customers acquired: BNP Paribas, Cardif, MorganStanley, Royal Bank of Scotland and many more