Real Academy - AI-powered English learning platform for elementary students

• Designed and implemented a backtracking algorithm to generate random word-search boards in multiple directions (horizontal, vertical, diagonal, and reverse), saving countless hours of manual setup.
• Seamlessly migrated from Lottie-based Avatars to Rive-based Avatars, reducing CPU usage by 62.5% and cutting app crashes by 90%.
• Built an endless 3D typing game featuring falling letter blocks, with difficulty that scales according to score and combo streaks. Used CSS perspective and preserve-3d for immersion and optimized performance with translate transforms to minimize reflow.
• Created a global audio service with preloaded background music, interaction sound effects, and dynamic volume controls (e.g., background music fade-outs, playback speed adjustments).
• Developed a robust global modal system supporting nested and independently managed modals, completely eliminating priority-related conflicts when multiple modals are open.
• Developed a universal, multi-step onboarding flow adaptable to various games, leveraging TypeScript generics to handle different configuration schemas with ease.
• Devised a remote force-update feature to ensure users remain above the minimum supported version, maintaining product consistency and preventing version skew.

R.test - AI-powered SAT test prep platform

• Enhanced the Geolocation API for payments using Edge Functions, cutting response times from 1200ms to 200ms (an 83% improvement) and raising uptime from <95% to 99.9%.
• Boosted page load speed by implementing Incremental Static Regeneration and eliminating unnecessary SSR, cutting product detail page load times from 5s to <1s and increasing monthly purchase conversion rates from 3.19% to 8.63% (a 270% jump).
• Adopted Tanstack Query to streamline API calls, bringing average question load time down from 2s to <0.5s and improving the exam-taking experience.
• Implemented a highly accurate, drift-compensating timer for mock exams, combining setInterval and recursive setTimeout to maintain precise timing despite JavaScript execution delays.
• Established a Query Key Factory to serve as a Single Source of Truth for Tanstack Query keys, improving consistency and eliminating human error.
• Designed a Delegate Router leveraging next/compat/router to handle breaking changes during the migration from next/router to next/navigation, accelerating the Pages Router to App Router transition by 300%.