CatzeLabs· YooldoFrontend Engineer

Problem · The campaign needed to funnel a multi-chain audience into one specific chain, and the resulting 750,000 new users triggered heavy traffic problems: bandwidth overruns on image/video assets, spiking Vercel image-optimization costs, and edge cases in verifying deleted accounts' game IDs.

• Tracked multi-chain participation with GA metrics and responded to community issues in real time.
• Moved transaction execution from server-side to client-side plus receipt verification to cut load.
• Relaxed game-ID verification for deleted accounts and supported post-launch CS.

Problem · Legacy code and an aging stack (styled-components, localStorage token storage) were holding back a brand refresh.

• Split atomic components into an npm library (catze-ui); separated the asset-heavy landing page from the game and on-chain interaction pages.
• Migrated styled-components to Tailwind CSS, adopted SSR, moved access tokens from localStorage to cookies with an expiry timer.
• Built and maintained Jury DAO, a decentralized system for reporting and filtering abusive in-game users.

Problem · Yooldo's own published games (Trouble Punk, RPD, and others) needed secure login and detection of tampered game clients.

• Introduced universal/deep-link login (yooldo://game/troublepunk) for improved security.
• Tracked game asset S3 hashes through the back office to detect tampered launchers.
• Supported Play Store market-link entry for Android-only titles.

• Cut the operational kill switch time by 10+ minutes. User/site interaction tracking, batch email sends, scheduled project updates.
• Shipped operational tools such as Jury DAO and the BRC-20 bridge through the back office; scheduled GitHub PR merges in the CI/CD pipeline.
• Contract, user, and on-chain interaction log tracking; set policy for wallet keys and infra credentials.

• Development and operations of the blockchain game web platform, handling on-chain interaction events.
• Transaction-receipt analysis to verify in-game asset acquisition.
• Built and ran a Bitcoin bridge (BRC-20).