Main product is Label Studio — labeling tool for ML training datasets. Tech stack: typescript, react, mobx-state-tree, d3.js, cypress, django, postgresql.- Key member of the team from the early stages- Added support of new data formats, significantly increasing audience and unblocking prospects (formats include time series for sensor data, taxonomy classification, synchronized media objects)- Redesigned the core architecture of the labeling tool, improving performance up to 10x and unblocking developers from developing new features- Analyzed and documented a significant portion of the legacy code, allowing clients and developers to use the tool in self-serve manner, relieving our support team- Investigated users interactions with the tool, gathered various use cases, creating the first detailed product documentation to guide users and team members.- Promoted and established best practices for writing and reviewing code, improving overall code quality within the team.

OSOME is a fast-growing Singaporean startup for entrepreneurs. Tech stack: typescript, react, styled components, redux, saga, enzyme.What I've done on my shift:- Created the whole web-version of client app from scratch with small team of 2- Improved testing, deployment and CI processes- Participated in UX decisions in close connect with designers and products- Rewrote the whole parts of back-office app, increasing performance, code quality and ease of use- Designed different internal APIs for new features

Worked on different engaging and complex projects on freelance:- Complex app for small estate developer (react/saga/graphql)- MVP of online banking app (react/saga)- Several big atomic interface components

Worked on banking web-app. Stack: cssnext/react/redux/sockets/protobuf.Interesting parts:- Huge full-screen transitions- Lot of global data and interconnections between pages- Card scrolling animation for React Native- QR code auth and own phone number input- WebWorker for crypto calculations

Lot of projects for Kaspersky Lab:- big startup about data privacy and management, now it's biolink.tech (react, redux, social api)- big project about social graph (js, fb api, php, mysql)- URL shortener kas.pr (php, jquery, sorry)- password checker (js)- small promo pages (js, fabric.js, canvas, etc)

Worked on backend for desktop app (php, mysql, protobuf), big data stats (lot of mysql) and main site features (php)

Created some fun and helpful projects, full stack development:- online TV with crazy content and progressive admin zone [modern html5 in 2010, php, mysql]- audiovisual academy [js, php] - support of art hub for artists and creators [php, mysql]