Artemii Chessler

Building a Telegram Mini App and a crypto trading platform for a Web3 startup with over 30 million users using React, GraphQL, and Web3 wallet integrations.

Built frontend, backend, and analytics features for an EdTech startup, including an iPad webview, a React-based Figma plugin, and Node.js analytics APIs.

Improved frontend build and test workflows for a large betting platform by migrating from Gulp to Vite, consolidating state management in Redux, and replacing Jest with Vitest.

Led React development for HSBC document workflows at a British fintech service, integrating Adobe Sign and reducing implementation time for new document workflows by 50%.

Led the frontend transition from plain JavaScript, HTML, and CSS to TypeScript, React, and styled-components, introducing a new architecture and build strategy that tripled development speed.

Contributed to Flutter web development for a personal finance app, building integrations for coupon and banking apps and reliable data flows for financial information.

Cut tool loading time from 2 minutes to 5 seconds and helped increase Chrome extension downloads by 100,000. Contributed to a major migration from jQuery to React, TypeScript, Rollup, atom-based state management, and Highcharts.