Client portal for a hosting provider (VPS, dedicated servers, VPN, S3, domains). Mix of Django-templated pages and Vue 2 Options API components; full migration to Vue 3 Composition API in a standalone frontend repo.

• Shipped production features within the first week of joining a live Vue 2 to Vue 3 migration, despite a React-only background
• Drove the frontend extraction from the Django monolith: migrated core modules to Composition API, Pinia, and Headless UI, moving from a backend-coupled codebase to a standalone frontend repo
• Replaced Highcharts with a custom SVG chart component (4 KB gzip vs ~90 KB): zoom, multi-series, touch, tooltips
• Built a client-side caching layer: before, every API call fired fresh on each page load; after, most data is cached and only refreshes on server events or user actions
• Migrated hundreds of components with full support for dark/light theming, 6 locales, and responsive breakpoints
• Automated the repetitive parts of migration with Claude Code and Cursor: i18n extraction, Options API to Composition API rewrites, boilerplate generation; hours of manual work reduced to a few commands

Online fitness platform. Sole frontend engineer for the full 4-year engagement.

• Built the web platform and admin panel from scratch; shipped two complete redesigns as the product evolved
• Built a reusable component library (~30 components, Storybook-documented, rollup-packaged) used internally and by external partners
• Migrated the platform to Next.js SSR: pages that were previously invisible to search engines became fully indexable
• Built 10+ Go + PostgreSQL API endpoints on own initiative, expanding beyond the primary frontend role
• Built a UI/UX design system from scratch with 2 designers and a PM: from atoms to components, adopted across the full web platform

Enterprise BPM/ECM platform for large-scale business: Unilever, DHL, Raiffeisen Bank, JCB. Led a team of up to 5 frontend engineers.

• Architected a full SPA rewrite and UI redesign of Citeck ECOS: migrated the stack from Apache FreeMarker, Knockout.js, ES5, and Gulp to a React / ES6+ / Webpack application; added widget-based configurable dashboards, filterable paginated tables, and dynamic column layouts
• Integrated the Flowable BPM engine into ECOS, giving enterprise clients a visual drag-and-drop interface for building and managing workflows
• Built a BPMN/CMMN process editor on bpmn-js and cmmn-js, replacing manual XML configuration with a visual authoring tool
• Built a no-code form builder on formio.js (~12 custom + ~22 extended components) so configurators could create forms without writing code
• Led a team of up to 5 frontend engineers, ran technical interviews, introduced unit testing and code review practices across the team

Consumer reviews platform with millions of monthly visitors. Full-stack work across frontend, mobile, and backend.

• Developed a React SPA; delivered a full UI redesign for irecommend.ru (millions of monthly visitors)
• Built a React Native mobile app and delivered it to internal review within ~3 months
• Developed ~10 Go microservices including a large API composition framework; reduced new service bootstrap time from days to hours
• Authored protobuf compilers for Go, PHP, and JavaScript, a font compressor, and Go/TypeScript code generators: dockerized CLI utilities that replaced manual multi-step boilerplate with a single command

Europe's leading e-commerce cashback service. Remote contractor.

• Built a browser extension for Chrome, Opera, and Firefox that detected cashback and discount offers on partner sites and showed a one-click activation widget; also delivered a full UI redesign of the main platform
• Automated affiliate network integrations (Admitad, Adtraction, Tradedoubler, Tradetracker) via ~20 background scripts processing partner data in multiple formats
• Built admin panel modules for report generation, store management, and partner network operations

Regional IT company. Sole developer on two independent web platforms.

• Delivered a property management portal (utility readings, maintenance requests, emergency alerts, live camera feeds, online utility payments) integrated with housing company APIs
• Built a real-time communication service (live chat, video calls, browser-to-phone calls, callbacks) with custom billing, payment gateway integrations, and SIP/Asterisk server infrastructure

Fornex Hosting

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Client portal for a hosting provider: VPS, dedicated servers, VPN, S3, domains and DNS. Migrated key modules from a legacy Vue 2 monorepo to a modern Vue 3 stack, replacing Django-rendered views with a fully client-side architecture.

GymTeam

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Online fitness platform. Built the web interface and admin panel from scratch, developed a component library, a dozen embeddable widgets, and integration libraries for third-party services. Led frontend architecture and collaborated with design on the UI system.

Citeck ECOS

Open-source platform for managing business processes, employees and company documents. Designed and built a new SPA from scratch, migrated the legacy stack, and developed a BPMN process editor and a custom form builder.

iRecommend.ru

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Review platform for products and services. Developed the SPA and a React Native mobile app prototype. Contributed to a Golang microservices framework and a cross-platform RPC protocol based on gRPC.

Bonusway

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The leading e-commerce cashback service in Europe. Built admin panel features including reports and partner network management, automated integrations with Admitad, Adtraction, Tradedoubler, and Tradetracker, browser extensions, and a hybrid mobile app.

CRM for a door manufacturer. Built an order configurator with a real-time visual preview of the assembled door - panels, hardware, and architraves. Included report generation, invoice and cutting sheet export, and role-based user access management.

This site - a minimal, fast personal portfolio built with Astro, Tailwind CSS 4, and zero JS by default. Designed from a self-written PRD and Design Brief; scored Lighthouse 95+ on Performance, Accessibility, and SEO.