Ohayu
• Improved the page speed of the site - increased Lighthouse score by 30 and 10 points (two iterations). Optimized bundle size by approximately 20%. • Introduced an image optimization strategy based on responsive image techniques, reducing unnecessary image load depending on device and screen size. • Refactored the requests queue. • Used lazy-loading for specific pages/components. • Adjusted Vite config. • Built and scaled a design system from scratch into a comprehensive component library based on styled-components for 15+ components. • Developed the admin panel from scratch: architecture, routing, authorization, MUI-based styling, API endpoints, and hooks. • Integrated Strapi CMS for 5+ content-managed pages, including a rich text editor for content editors. Reduced the number of tasks related to changing static content to 0. • Improved multi-repository management by using a shared design system across the main product and marketing funnel, and created sub-projects. • Designed a scalable funnel and A/B testing architecture covering 10+ step variants — built a step-based funnel skeleton that allowed flexible step substitution depending on active experiments. It saved time for future A/B tests. • Integrated a payment system on the front-end. • Migrated 4 tracking scripts to Google Tag Manager, improving maintainability and flexibility of analytics setup. Reduced the number of tasks related to the marketing updates. • Integrated Amplitude and implemented a cookie consent mechanism controlling analytics and marketing scripts based on user permissions. • Introduced unit testing with Vitest + React Testing Library and advocated for making it a required part of the development process. • Configured ESLint rules enforcing React hooks guidelines, reducing bugs in complex components, and improving codebase stability. • Established a mobile-first CSS methodology as a team standard, ensuring consistent and predictable styling across breakpoints. • Implemented semantic HTML structure and Organization schema markup in collaboration with SEO specialist, improving search engine visibility.
