YUNFENG ZHAO

Architected knowledgebase system for retrieval-augmented generation (RAG) capabilities, enhancing answer relevance.

Solely designed widget that aggregates data across multiple pages; adopted by 12+ enterprise clients, improving engagement for over 200,000 employees.

Launched Heatmap Trending feature, resulting in 25% increase in analytics adoption among key clients like KPMG.

Implemented statistical significance calculations in widget, improving data accuracy and minimizing manual reporting efforts.

Led migration of widget from Angular to React, reducing technical debt while mentoring junior developer for timely delivery.

Initiated foundational employee experience widget support in customer experience dashboard, fostering cross-department collaboration.

Executed user load testing for major clients such as Walmart and JP Morgan using Selenium and JMeter; identified bottlenecks and optimized performance.

Served as Tech Lead, effectively resolving blockers and enhancing cross-team collaboration.

Developed core features for O365 tenant-to-tenant migrations, enabling mailbox transfers for 100+ enterprise customers.

Delivered V2 on-prem to cloud migration as a standalone product, driving significant recurring revenue growth.

Led design and implementation of Active Directory synchronization, reducing setup time by over 50%.

Maintained legacy code managing tens of millions of records, achieving 99.99% uptime.

Rewrote core product frontend using React and Redux, enhancing load times and minimizing bug backlog.

Mentored engineers to expedite code review processes and increase team delivery speed.

Acted as Scrum Master, coordinating global teams and ensuring high sprint completion rates.

Designed and implemented major features for Faithlife Giving platform, processing over $100 million in annual donations.

Integrated ElasticSearch into Giving API, decreasing search response time from seconds to milliseconds.

Developed event-driven payout system using RabbitMQ, automating notification workflows and minimizing manual tasks.

Created automated CSV import tool, reducing multi-day data imports to minutes and enhancing customer adoption.

Conducted regular demonstrations of features at company-wide meetings to collect feedback and inform product enhancements.

Participated in 24/7 on-call rotations, achieving 99.99% uptime for critical services.

Designed internal R&D Ticket System to enhance task tracking and resolution efficiency.

Created company calendar tool utilized daily by over 100 staff to streamline scheduling.

Built DSS Workflow Portal for role-based management and real-time change tracking, improving audit readiness.

Developed Windows Tablet QA Checklist App with offline mode to facilitate inspections in remote facilities.