Leading the video team responsible for the video conferencing parts of the Vowel platform:

• Mentoring other team members, making sure they grow and keep getting better

• Keeping team members engaged and happy at what they do

• Interviewing new candidates and improving the interview process

• Working with upper management on improving workflow and company processes

• Coordinating new feature releases

Architecture:

• Working with upper management and the product team on the future roadmap

• Architecture of the video conferencing / infrastructure / real-time parts of Vowel

• Impact across multiple teams in the company

• Managing video conferencing quality improvements

• Monitoring metrics and performance of the video conferencing components

Hands-on:

• Building scalable, video infrastructure in Kubernetes based on Jitsi videoconferencing system

• Support for waiting rooms and pre-join screen (frontend + backend + XMPP)

• Made AWS add features to MSK (Kafka) which allow to achieve full throughput in cross-region scenarios

• Video quality improvements:

• Client-side (JS/WebRTC) and backend work (Java/Kotlin/WebRTC)

Debugging and solving difficult problems

Working with the Jitsi team on the open-source project (https://jitsi.org/):

• Adding support for multiple media streams in video calls, a large effort across 3 independent organizations (Jitsi/8x8 + Vowel Inc. + Bloomberg)

• Support for AV1 video codec

• Mentoring other Vowel team members on how to contribute to open source

• Maintaining a fork of an open source project

Other:

• Winning multiple internal hackathons, either individually or as a team

Technologies:

WebRTC, JavaScript/TypeScript, React, React-Native, Java, Kotlin, Kubernetes, XMPP, Prosody

Worked on various aspects of the Jitsi video conferencing system integrated into 8x8 applications:

• Helped with infrastructure changes required to support millions of monthly active users - a spike during the COVID pandemic

• Led the migration from XMPP BOSH to Websocket with Stream Management XEP-0198 implemented for Strophe.js

• Coordinated the effort of the WebRTC browser client performance optimizations

Worked on the client architecture and implementation of Jitsi Meet Spot - a huddle room solution:

• Implemented client to backend integration, P2P failover mode, added analytics and monitoring

Electron and React-Native wrappers for Android, iOS, Mac and Windows

• Built pipelines for Electron app builds with auto updates, continuous integration and automated testing in Selenium and Jenkins

Technologies:

WebRTC, JavaScript, React, React-Native, Selenium, Electron, Docker, XMPP, Prosody

As part of the video team, developed Jitsi video conferencing system used in Stride Meetings - previously known as Hipchat:

• Integrated WebRTC browser client with existing Atlassian products

• Added SFU load balancing, failover and health checks to the signaling component

• Worked on various features and connection handling on the client, including parallel peer to peer connection establishment US patent 10630739

• WebRTC data channel support on the browser client

Selective Forwarding Unit:

• Support for WebRTC data channels by implementing a Java wrapper around native usrctp library

Helped develop and maintain WebRTC client for mobile devices written in React-Native:

• Implemented Android ConnectedService integration

• Mobile phone testing automation and build pipelines

• Feature parity between web and mobile platforms

• Apple Watch integration

Technologies:

WebRTC, Java, JavaScript, React, React-Native, Selenium, XMPP

Worked on the Jitsi open source project:

• Implemented a chat application with audio/video calling support on native Android

• Participated in a browser WebRTC client implementation (Jitsi Meet):

• Media stream signaling and SDP munging

• Screen sharing and other features

• Backend component which coordinates WebRTC media sessions

• WebRTC to SIP/PSTN gateway component

Mentored a student during Google Summer of Code who developed a media relay server (TURN) in Java.

Technologies:

WebRTC, Java, native Android, JavaScript, XMPP, SIP, ICE