• Optimized page rendering performance by 5x reducing full page load time from one minute to several seconds
• Reduced average query response time by 30% through systematic optimization of data retrieval processes enhancing database query efficiency
• Achieved 3x faster conflict resolution by developing high-performance data parsing solution enabling rendering of tabular data with tens of thousands of rows through modern technology stack implementation
• Maintained mission-critical systems supporting enterprise reporting infrastructure across multiple development teams

• Contributed to successful product acquisition by DMI through development of scalable enterprise reporting platform
• Built reporting solutions for platform serving ~1000 enterprise customers, including top-10 global corporations, major government institutions, transportation networks, hospitality chains, and industrial manufacturers
• Accelerated feature delivery by 30% by migrating to modern VueJS-based design system
• Improved API documentation adoption by 60% through successful REST to GraphQL migration

• Maintained dashboard infrastructure serving 189M monthly page views and 19M unique visitors
• Delivered unified theming system enabling rapid visual customization across 24 regional news portals through CSS variables architecture
• Reduced CSS codebase by 17% by developing reusable theming architecture

• Significantly improved application performance through microservices architecture implementation
• Enhanced development productivity by establishing modern development practices and architecture
• Mentored development team through early transition from monolithic to microservices architecture

Built scalable architecture for high-traffic Vietnamese market application. Improved user engagement through A/B testing and mobile optimization.

Delivered complete React.js product refactoring under tight deadline, contributing to successful Samsung acquisition.

It was a long time ago, and some things may have faded from memory. During this period, I worked as a freelancer with various companies. I started my career as a webmaster. I was hungry for tasks and thirsty for challenges (and still am!). As a freelancer, I tackled a wide range of tasks: developing websites from concept to finished product. I used ready-made CMS (MODx, Wordpress) and built websites from scratch using the CodeIgniter framework. I developed custom WordPress themes and actively participated in the development of the Russian-speaking WordPress community as a moderator.