- Led, grew, and coached 15+ engineers in 3 disciplines (C++, data, backend).- Led critical projects, including latency reduction, codebase refactoring, and data pipeline.- Acted as project manager to facilitate communication between traders and engineers.- Foresaw upcoming product challenges, proactively allocated resources and gave technical guidance to the team.

Led, grew, and shaped a fully remote engineering team.- Led a remote engineering team of 20+ frontend, backend, and mobile engineers from Silicon Valley, NYC, mainland China, and Taiwan- Boosted team execution speed by 2x by tighter communication among engineers and product managers- Foresaw upcoming product challenges, proactively allocated resources, and gave technical guidance

Acted as technology evangelist, a cross-domain work among technology, public relation, and human resource.- Re-architected business intelligence platform to enable near-real-time dashboard in hundreds of terabytes of daily event data.- Re-architect online event management system to support 5x more of streamer events, driving 70% of the company’s revenue.- Re-architect machine learning pipeline to enable real-time content detection in livestream (eg. porn detection, topic modeling etc).- Built company-wide communication process between engineering department and other stake holders to improve product quality and customer satisfaction.- Led the effort to build the relation toward engineering community via activities (ex. sponsorship and meetups). Improve NPS (net promoter score) by 10.

Cross geo location and language collaboration among execs.- Led product development center of 25+ people, including engineers, product managers, and designers- Collaborated with Israeli CEO and Indian CMO (Chief Marketing Officer) with technical insights to achieve business goals- Expended infrastructure to South-East Asia to support global business- Led the effort to transfer ownership and rewrite building pipeline of 200 apps to reduce 80% of manual process- Reduced 60% of QA effort with test automation and removal of low-risk test cases- Introduced machine learning to screen user generated photos in (1000+ photos / hour) in real-time

Led backend and Site Reliability Engineering (SRE) team of 30+ engineers in 17media, a live streaming app with millions of active users.Backend:- Architected backend modules for high traffic (10k QPS) and fast development cycle (daily release).- Designed and implement key components: key-value and relational data storage, pagination, run-time server configuration, i18n, context logging, etc.- Achieved 10x performance gain and smoother developing experience by migrating backend from NodeJS to Golang.- Continuously mentored engineers to challenge 120% of their personal limit.- Tailored PM's requirements and engineers' designs to stay in balance between business needs and tech debts.SRE:- Built debug and monitoring flow with TBs of daily log and 1M metrics.- Led the effort to improve backend stability from 2 outages per week to 1 per month.- Migrated whole backend from AWS to GCP with seconds of downtime.- Architected backend infrastructure as codes and dockers to prevent human error.Team and Culture:- Managed and developed team from 3 to 30+ engineers across different areas: Feature, Infrastructure, Payment flow, and Site Reliability Engineering.- Coached 5 engineers to become technical leaders.- Tuned scrum process so empower engineers to effectively hold requirement, design and planning meetings in one day.- Consistently foresaw potential risks in software and human process to stay in balance among developing speed, outages, and growing team size.

- Built and operated from scratch a scalable and fault-tolerant cloud infrastructure for mobile applications. The platform has backed 5+ apps and 3M+ users.- Led server team from product inception to public launch of Cloud Gallery. CG provides a macro view to a user’s photos in cloud services (ex. Facebook). 2M monthly active users.- Designed and implemented key components including photo crawler, OAuth library, data storage service, and monitor/alert service in Go(lang).- Reduced 70% of cloud computing cost by autoscaling.- Redesigned deployment flow to minimize human error. Reduced docker building time by 80%.- Maintained log-aggregating cluster receiving billions of records per day from mobile devices.- Redesigned engineer hiring process and coached 50+ engineers to conduct technical interviews.

- Analyze user behavior to provide better service quality.- Process TV device log by MapReduce to gather statistic data.- Build real-time video transcoding and streaming server to Android devices.- Develop Google Hangout video conferencing client software.- Launch team member of Google Fiber project.- Awarded director spot bonus.

- Applied statistical methods and unsupervised learning algorithm toward next generation video compression (HEVC).- Solved the complexity problem of video compression by fitting with probability model and mapping the complexity into confidence level.- Analyzed and researched high performance parallel video compression codec in CUDA.

- Developed H.264 / MPEG4 encoder behavior algorithm model for mobile devices.- Designed and tested H.264 / MPEG4 encoder hardware architecture model (C model), including: B-frame, motion estimation, motion vector predictor calculation, sub-pel interpolation, multiple reference frame, and handling of memory transaction clients.- Implemented motion compensation by assembly micro-code.- Developed flexible simulation infrastructure, including command line parser and driver, for hardware verification.- 1 patent issued.

- Developed user interface and driver level program of DECT cordless phones.