Tumenbayar Shiirevvaanchig

Senior Software Engineer

Next Chapters•  August 2023 - December 2024•  Erie, PA

Engineered a complex, dynamic frontend architecture using React and Tailwind CSS, enabling a highly interactive and responsive user experience for AI-driven content creation. Built highly scalable API services on AWS (Lambda, S3, CloudFront, DynamoDB), ensuring 99.9% uptime. Led a team of front-end engineers in optimizing UI performance, implementing virtualized lists, lazy loading, and server-side rendering (Next.js), reducing load times by 50%. Implemented CI/CD pipelines using GitHub Actions & Docker, reducing deployment time to 1 minute. Optimized front-end API calls with caching and batching strategies, improving app response times by 40% and reducing backend requests by 65%.

Senior Software Engineer

DropBlok IO•  July 2021 - August 2023•  San Francisco, CA

Architected a no-code mobile app builder using React Native, Node.js, and AWS, reducing app development time by 40% and enabling users to create custom mobile applications without coding. Developed an ad-based monetization engine that increased revenue by 30%, integrating Google AdMob and in-app purchase solutions for a seamless experience. Led the front-end engineering efforts for a multi-tenant, white-label platform, enhancing system flexibility and scaling to 50+ businesses with 300,000+ active users. Implemented a real-time collaboration feature using WebSockets and Firebase, enabling multiple users to edit and preview their apps simultaneously.

Software Engineer

TomYo EdTech•  June 2018 - July 2021•  San Francisco, CA

Led the design and development of scalable e-learning platforms (TomYo Skills, Lingo, ELLA), serving 3,000,000+ active users and increasing engagement by 50%. Built a gamification system with leaderboards, achievement badges, and AI-driven personalized learning recommendations, boosting retention rates by 35%. Architected a global Video-On-Demand (VOD) system using AWS S3, CloudFront, and a multi-region CDN, reducing video buffering times by 60% and ensuring seamless low-latency streaming. Led the development of a revenue-sharing fintech solution, automating earnings distribution for content creators, and increasing retention by 25%.