elenamakarenko

Led frontend architecture for 5M+ user platforms processing 100M+ images, owning development from initial design through launch. Collaborated with business team on product structure and with backend team on designing API architecture. Phased out the legacy platform with minimum user impact. Improved Core Web Vitals by optimizing code, implementing SSG architecture, and ensuring semantic structure, which resulted in #2-3 Google search ranking in main keywords and increasing organic traffic by more than 40% over time. In collaboration with marketing team, created the A/B testing and experiences frameworks, integrated analytics tools, shipped localization, which resulted in almost 21% higher conversion. Initiated creating the component library with Storybook with 50+ components in collaboration with design team, establishing consistent design system adopted across products. Bootstrapped self-service blog platform, tools for quick demo creations and CMS, empowering marketing, content and sales teams to operate independently. Implemented unit and end-to-end tests with Jest, React Testing Library and Playwright. Analyzed product KPIs and user feedback to propose UX and SEO/GEO improvements that enhanced retention and user satisfaction. Led recruitment and onboarding of frontend engineers, conducting technical interviews.

Built cloud-based smart home management system enabling users to control multi-vendor IoT devices from single interface. Created local and cloud apps from scratch using React, WebSockets, MQTT, Node.js, MongoDB. Developed voice assistant integrations for Amazon Alexa and Google Home, creating 'connecters' SDK for developers. Created integration layer connecting diverse smart home device APIs (Telegram, WeChat, Facebook), enabling unified device management. Mentored junior developers. Built React Native applications, solving cross-platform geolocation challenges on iOS and Android. Implemented video capture and server upload functionality using Firebase.