Senior Software Engineer

• Apr 2018 - Present

- Designed and implemented a highly parallelized video transcoding and quality control system using AWS serverless technologies. - Built customized implementations and proprietary extensions for video streaming protocols, including MPEG-TS, HLS/DASH and RTP - Participated in the integration and deployment of these cloud-based solutions into the client's architecture. - Designed and implemented a highly parallelized video transcoding and quality control system using AWS serverless technologies. - Built customized implementations and proprietary extensions for video streaming protocols, including MPEG-TS, HLS/DASH and RTP - Participated in the integration and deployment of these cloud-based solutions into the client's architecture.

Professional Freelancer

• Mar 2018 - Present

Watson Media Tech Lead

• Sep 2017 - Mar 2018

- Designed the architecture of IBM Watson Media projects, including IBM Watson Video Enrichment and IBM Watson Captioning.- Supervised the development processes, trying to keep complexity at minimum. Identified tech debts, prioritized work to ensure that the solutions remain stable, scalable and operable.- Led the technical discussion between the stakeholders: product, devops teams, research teams and management.

Cognitive Video Team Lead

• Jun 2017 - Sep 2017

- Designed the architecture of the IBM Watson Video Enrichment product.- Led a small team that implemented cognitive video analysis on pre-recorded videos, applying Watson's existing cognitive services and integrating custom, video-based solutions. Created a parallelized video processing engine in Go+C that is easy to make distributed (multi-node) when needed.- Finished an MVP product in only two months, including the integration with other teams and deployment into a multi-region Kubernetes-based environment.- Collaborated closely with IBM Research Teams and Offering Managers in an agile environment. Show less

Transcoding Team Lead

• Jun 2016 - Jun 2017

Continued my previous role (Mobile Streaming Lead) in a different team setting.- Introduced a completely redesigned streaming architecture. The new system supports a newly designed, highly optimized video storage format, dynamic packaging, HTML5 streaming, fast live2vod capabilities.- Played a key role in designing, developing, testing the new system and seamlessly migrating users to the new streaming stack.- Co-authored two patents that describe the new architecture.

Mobile Streaming Lead

• Jun 2012 - Jun 2016

- Led a small devops team responsible for the whole mobile streaming stack: design, development, testing, infrastructure automation and monitoring.- Designed and implemented server-side software that converts live and on-demand video to mobile-compatible formats (real-time transcoding and re-packaging between video streaming protocols).- Redesigned the existing transcoding architecture to make it fault-tolerant and highly reliable.- Developed a fully automated infrastructure that autoscales in multiple cloud providers and regions according to the users' demand.- Implemented real-time monitoring systems for mobile-related services.A variety of technologies and programming languages were used in this work, including C, Clojure, Nginx+Lua, Python, PHP and Ruby. Show less

Lead Mobile Architect

• Jul 2010 - Jun 2012

- Designed and implemented cross-platform solutions for video streaming, client-server communication and various domain-specific tasks. These solutions served as the core of Ustream's iPhone and Android apps.- Ported Ustream's live video streaming technology to digital cameras, portable live production systems, camcorders and other embedded systems. Led technical discussions and integration projects with worldwide-known hardware companies including Logitech, Panasonic, Samsung and Sony.- Supervised research projects on Android, iPhone, BlackBerry and Windows Phone 7 platforms. Show less

iPhone Developer

• Sep 2008 - Jul 2010

- Developed Ustream's iPhone application, leading small teams (3-10 people). Created one of the first live video streaming applications in the App Store, resulting in 113K downloads on the first day.- Created a cross-platform video player and video broadcaster component for iPhone, Android and Windows Mobile 6.- Reverse-engineered undocumented parts of the Adobe RTMP protocol and various video-related formats.- Implemented an asynchronous, event-driven networking library for client-side applications.- Optimized user interfaces and video streaming code to work smoothly on constrained CPU and memory conditions. Show less

Web developer

• Apr 2006 - Sep 2008

- Built several web applications in PHP in a small team (4-8 people). - Became an expert on cross-browser support (CSS and JavaScript), especially IE compatibility. - Designed and implemented component-based web framework for Web 2.0 applications. - Built several web applications in PHP in a small team (4-8 people). - Became an expert on cross-browser support (CSS and JavaScript), especially IE compatibility. - Designed and implemented component-based web framework for Web 2.0 applications.