Developed and maintained two core products for 5+ years: the admin portal for institutions andthe student-facing site.
Built on React 19, Next.js and TypeScript .
Integrated Stripe payments (Stripe Elements, card forms) for course enrollment and checkoutflows.
Implemented Algolia-powered course search with filters, plus client-side fuzzy search (Fuse.js,match-sorter).
Built data-heavy admin screens: sortable and filterable tables (TanStack Table), virtualized listsfor large datasets (TanStack Virtual, react-window), dashboards with Nivo bar and pie charts.
Created a rich-text editor on Lexical (tables, lists, links, code, Markdown import/export).• Delivered CSV/Excel import and export, and PDF report generation for administrators.
Built complex forms with React Hook Form + Zod validation, phone and input masks, datepickers.
Managed app state with Redux Toolkit and RTK Query; server-side rendering with next-redux-wrapper.
Built accessible UI with Radix UI and Ariakit; documented components in Storybook.
Wrote unit and integration tests with Vitest, Testing Library and MSW; tracked coverage.• Contributed to tooling: migration from Webpack to Vite, Oxlint/Oxfmt and Stylelint setup,bundle analysis.
Supported deployments on AWS via SST and Serverless (CloudFront cache invalidation);monitored errors with Sentry.
Kept the stack current, including upgrades to React 19 and newer TypeScript versions.

Підтримка сайтів і серверів, допомога в налаштуванні і редагуванні сайтів.