Senior Frontend Developer
ZeBrains
Feb 2022 — Aug 2026Built and maintained medical registry and laboratory systems used by 30,000+ registrars, improving load performance and reducing production defects; also delivered an interview scheduling MVP and mentored three developers.
• Project: Medical Registry System for Laboratory Management (client: Invitro).
• Designed and built the frontend from scratch on Feature-Sliced Design: one scalable slice per business entity with dedicated types, UI and API layers, so new modules ship without touching existing ones.
• Moved registry and reference-data screens to React Server Components on the Next.js App Router and added route-level lazy loading and code splitting, cutting the client bundle by 40%, initial load time by 30% and LCP from 3.1s to 1.4s; streamed server-rendered HTML lets results paint before hydration.
Frontend Developer
Andersen
Software development and IT consulting company.
Dec 2020 — Dec 2021Improved two client CMS products, reducing load times and replacing spreadsheet-based capacity planning with a shared tool.
• Project: CMS for a major streaming service (client: Wink / Rostelecom).
• Migrated the build from Webpack to Vite: cold start dropped from minutes to seconds and hot reload became instant, so the team stopped waiting on the build between edits.
• Cut page load time from 4-5 seconds to 2 seconds through code splitting of components and reducers.
• Built the content editing forms with autosaved drafts, so editors stopped losing long articles to a closed tab.
• Implemented a smart date range input with format prediction, cutting data entry time for editors.
Web Developer
UMI
Sep 2019 — Dec 2020Delivered 100+ corporate and e-commerce websites and integrations; reports a 70% increase in organic traffic and 90% repeat-client rate.
• Shipped 100+ corporate and e-commerce sites on UMI.CMS, building custom templates and modules where the platform fell short.
• Launched custom integrations with 1C, Bitrix24 and amoCRM, streamlining order and inventory synchronization.
• Configured payment gateways, shipping methods and marketplace feed exports (e.g. Yandex.Market) for e-commerce clients.
• Increased organic search traffic by 70% through structured SEO settings and a content strategy.
• Result: 90% of clients came back for further work or ongoing support.
Web Developer
Freelance
Aug 2018 — Aug 2019Built responsive client websites and handled CMS integration, backend customization and build automation.
• Delivered end-to-end website builds for multiple clients, converting designs into responsive cross-browser layouts and integrating them into WordPress, 1C and 1C-Bitrix.
• Handled backend customization (PHP, XSLT, TPL) and build automation with Gulp, streamlining the handoff from design to production-ready site.
