I'm back after a 13-year hiatus. I'm maintaining xfdesktop (desktop background/icon manager) and xfce4-notifyd (desktop notifications) again, as well as working on porting the desktop to Wayland.(Open source, volunteer basis.)

Collaboratively owned architecture and infrastructure design for SDK Infrastructure (formerly Twilio Client and Twilio Video). Migrated a Redis data store to Amazon DynamoDB with zero downtime.As sole developer, created the first version of Twilio Wireless in six months, suitable to demo at Twilio's developer conference and to onboard initial preview customers. Afterward, assembled a team of four engineers in order to harden it and flesh out remaining features.Again as sole developer, defined, built, and launched Twilio's Programmable Fax product in five months, launching it to customers as a public beta (as an April Fool's joke that was not a joke).Collaborated in the development of Twilio Autopilot, a natural language understanding engine for building smart communications interactions.Worked on Twilio's internal platform to make development of internal applications easier, safer, more resilient, and more scalable, and to avoid duplication of effort. Worked on the design of Twilio's next-generation API routing proxy. Productionized and maintained a third-party workflow management service.

Served as tech lead for the Twilio Client team, helping grow the team from two to six people. Led architecture, design, and implementation for global low-latency audio for Twilio Client Mobile and WebRTC, as well as various quality and monitoring improvements for its distributed cloud infrastructure.Inherited, maintained, and improved several orphaned parts of the company-wide infrastructure deployment and provisioning pipeline.

Built version 1.0 of Twilio Client for Android from scratch, while helping to push Twilio Client for iOS across the finish line.Collaborated on a server-side WebRTC implementation for Twilio Client and owned and maintained the Client infrastructure and Android & iOS SDKs as part of a two-person team.

Built code generation for ngrok's Java and Scala API client libraries, and integrated them into the existing CI and build system. Improved the in-house API modeling code to better represent complex data types.

Built iOS photo sharing application to interact with web service, releasing it to the App Store along with several later bug-fix and feature releases. Added API hooks to Ruby on Rails web application to support mobile app.

Designed and built a 2.5D OpenGL ES2 canvas-like renderer in Java and C/C++ for an application framework on Android. Prototyped UI/UX tools, e.g., an iOS-based touchscreen remote control simulator.

Led a team responsible for design and development of Kno's third-party SDK. Owned the graphics stack and most of the touchscreen input stack of the (sadly-never-shipped) Kno Tablet.Miscellaneous hats worn: device architecture; build, packaging, and update systems; Linux kernel porting and bug-fixing; system and application performance tuning; UI styling; desktop services (app launching, desktop compositing, window management); network infrastructure.

Improved and maintained the xfdesktop (desktop manager) and xfce4-session (session manager) modules, designed and authored xfconf (configuration storage system), worked on core software libraries and on spin-off software projects. (Open source, volunteer basis.)Supported users via email list and bug tracker, co-maintained project server (website, bug tracker, wiki, Subversion, Git, etc.). Wrote tools to migrate years of Subversion revision history to a series of Git repositories.

Assisted in development of in-house software for Linux-based networked audio/video set-top platform on fairly restrictive MMU-less ARM and MIPS SoCs. Maintained kernel, build system, and system libraries. Remotely managed Beijing-based QA group.

Owned engineering-side multimedia product development from conception to introduction into the market, creating and managing schedules for third-party hardware and software design and manufacturing firms (US/Taiwan/China/Malaysia), as well as conducting product verification and feature & interoperability testing.

Developed and enhanced server-side authentication and authorization software, integrated Kerberos authentication into client-side Linux applications. (part time during the academic year, full time over the summers)