cssemenyuk

Core frontend developer on one of the most popular AI companion platforms with 2M+ monthly active users Built and optimized real-time chat interfaces handling 500K+ daily messages Implemented content moderation, age-gate, and compliance flows; supported SEO efforts that ranked target AI-companion queries in Google top-3 Improved page load performance by 40% through code splitting, lazy loading, and caching strategies; led migration from JavaScript to TypeScript across the codebase Collaborated with AI/backend teams to integrate personality modeling and adaptive conversation UIs

Maintained 70%+ proposal-to-contract conversion rate Completed 10+ successful contracts Delivered across AI apps, games, and web platforms Consistently received 5-star reviews

Built 3+ products completely from scratch, from architecture to deployment Led a team of 4–6 developers, performed code reviews, and improved code quality by 30% fewer bugs Implemented end-to-end testing that reduced release issues by 25% Delivered complex features such as custom canvas/text editors and calendar timelines used by 1,000+ users Mentored 2–3 new team members, speeding up onboarding time by 40% Coordinated with both clients and teams, maintaining 95%+ satisfaction rates