timoferris

Built and maintained two large-scale client-side web applications, increasing monthly active users from 2,000 to 5,700 (+185%). Refactored legacy code, reducing average page load time by 42% and boosting customer satisfaction scores from 4.1 to 4.7. Developed and implemented 25+ new features based on customer feedback; contributed to a 26% increase in user retention rate. Reduced the number of critical bugs in production by 60% through implementation of automated end-to-end testing and regular code reviews. Coordinated backend integration, which cut external API response errors by 30%. Enhanced onboarding flow, lowering user drop-off rate during registration from 17.5% to 9.2%. Technologies: React.js, TypeScript, Node.js, REST API, PostgreSQL, Git, Docker.

Developed full-stack web application from scratch, delivering project 2 months ahead of deadline and under budget. Implemented advanced authentication system, resulting in a 4x decrease in unauthorized access reports. Improved UI responsiveness, raising average session duration by 22% and decreasing bounce rate from 18% to 7.5%. Automated deployment pipeline with Docker, reducing release time from over 2 hours to 35 minutes. Designed modular component system, reused in 3+ company projects, saving ~40 developer hours per project. Technologies: React.js, Node.js, TypeScript, PostgreSQL, Docker, REST API.