Aleksandr Vorontsov Email & Phone Number

Contract job on a project Playdeck - Telegram games catalog.I did mostly infrastructure things & from time to time implement new features (Tournaments, for ex.).1. **Switch CRA → Vite; React Context hell → Zustand; Components → FSD Style.**2. Developed analytics service for all the events throughout Market3. Developed ServiceLogger for sending events to Sentry through backend as a proxy. Increased visibility and decreased frontend build for 70 kb there.4. Setup from scratch all the ESlint, Prettier, Precommit, browserlist, etc5. Analyzed & improved build size via Lighthouse + custom metrics like page_load_time6. Developed & refactored nitty-gritty telegram API things: link-openers, bot-params-api, etcStack: Vite, React, TypeScript, Zustand, react-lottie, ESlint, Stylelint, Prettier, Axios, SCSS.

Contract job on a project [Cedrus Data](https://www.cedrusdata.ru/technology) - **distributed SQL query engine based on Trino**. Starting from scratch, I built frontend architecture in Feature Slice Design style + add variety of tests, but integration tests mostly. 1. **SQL Editor with data query support and results viewer**2. Authentication3. Internationalization + ThemesStack: Vite, Vitest, MSW, React, TypeScript, Material UI, Monaco editor, Ag-grid, RTK Query, Axios, SCSS, i18next, Redux-Toolkit, react-hook-form, zod, ESlint, Stylelint, Prettier.

Saint Petersburg Metropolitan Area

I worked on Videoly widget - the customer facing product that’s used to show up videos, support multiple video providers, analytics, A/B tests, custom extensions, several UI representations, client API and much more.Most of the time I’ve been developing the brand new widget: wrote code + tests. The initial project, written in vanilla JavaScript, was full of code couplings and tricky staff, so it was a great time for developing Sherlock's intuition. Alongside I had the opportunity to work with the backend side, videoly chrome extension, Sentry and Browserstack.- Completely rebuild widget from native JS into TS / Web Components / Inversify- Developed client API which allow multiple widgets + unlimited views customization- Revamped 4 webpack configs from zero: decreased bundle size, fixed tree-shaking- Moved wistia player into separate repo with state machine wrapper and reduced main widget bundle by 20Kb player size- Refactored all unit/integration tests + fix e2e tests- Fixed numerous of tricky bugs: monkey patchings, iframe bugs, heartbeat metrics, etc- Made widget presentation for 25 colleagues to share knowledge among teamsStack: LitElement, TypeScript, JavaScript, Inversify, Karma, Mocha, Chai, Cypress, Docker, Webpack, Robot3, SASS, Browserstack, Node.

Ульяновская Область, Россия

I worked on CRM system "Detours" for a leading producer of electrical and thermalenergy in Russia. After switching to micro-services lots of pieces had new data formats, huge React components/reducers required refactoring.Concrete:-- Removed more than 10 000+ lines of legacy-- Refactored to clean parts modules with up to ~1500 lines of code-- Reassembled monstrous charts reducers & normalize complex charts data-- Created from scratch separate dashboard with analytics for several affiliates-- Conducted ~10 job interviews for front-end developersStack: TypeScript, React/Redux/Thunk/Saga, Material, SCSS, Recharts, Jest, Enzyme

Санкт-Петербург, Россия

I worked on a several **fulfillment systems** projects: B2B, B2C. - **Developed most of the components & screens for mobile devices**: login,registration, restore password forms, orders, product card, shipping, delivery, etc- Created complex form with stepped logic for registration new legal entity- Refactored dozens of components from classes to functions components + hooksIn my spare time a learned a lot. Read books like: Grokking algorithms, C.O.D.E., SICP, Linux command line, etc. Attended and finished courses: [Web Developer Bootcamp](https://www.udemy.com/course/the-web-developer-bootcamp/), [JavaScript/DOM/Interfaces](https://learn.javascript.ru/courses/jsbasic), [HTMLAcademy](https://htmlacademy.ru/intensive/htmlcss), [React+Redux](https://www.udemy.com/course/pro-react-redux/), [CS 253 Web Security](https://web.stanford.edu/class/cs253/), etc.Stack: TypeScript, React/Effector, Material UI, Styled Components

Москва, Россия

Yandex.Taxi - is an international company that operates taxi aggregation and food tech businesses across Russia, CIS, Eastern Europe, Africa and the Middle East. The company is among the world's leading developers of self-driving technology.-- Successfully concluded agreements with companies all over the Russia-- Help/Trained new employees in basic business processes-- Was promoted to team-lead.

Санкт-Петербург, Россия

-- Provided professional high quality support for biggest corporate clients of Avito company: autoupload ads problems, billing issues, blocking/rejecting ads, shop service problems and other products.-- Was promoted 5 times