Controller tracking, Embedded algorithms.

Data Warehouse. * Replication and synchronization across Vertica clusters * Vertica Data Collector log propagation into Kafka/Hadoop * Workflow tools for interacting with PhabricatorTech Used: Go, Python, Bash, Vertica, Kafka, Avro, inotify, Hadoop/HDFS, plus Uber proprietary tools

Worked on the Amazon Echo from the mid-prototype stage through market release, and other as-yet unannounced follow-on products.* Focused on gstreamer-based audio player* Performance and memory profiling* Designed a pooled memory allocator* Implemented a cloud-side media pre-stage to reduce playback startup latency* Underrun detection and recovery* Provided mentoring and guidance to junior engineers* Misc tools adopted by teamTech Used: C/C++, Boost, glib, gstreamer, Git, Gerrit, Repo, Valgrind, Google Perftools, Linux perf, trace-cmd, kernelshark, kcachegrind, gdb, Bash, Perl, Python, Bitbake, CMake

Software development focused on Git and Gerrit. We ran all of Git and Gerrit operations globally, source code distribution to mirror sites, etc.* Improved performance of repository replication system by 1000% (yes, there was a lot of room for improvement)* Tracked down Git O(m*n) behavior in push with many refs, improved to O(m*log(n)) (patch accepted upstream, released in 1.8.2)* Designed a system to retrieve and update local configuration settings stored in a remote git repository. Adopted by entire Android team.* Investigation of Gerrit/Jgit and core Git, bugs, performance and scalability of large repos and repos with extremely high ref counts* Investigation of connection, performance, network issues* Design of server hardware/software configurations for Git/Gerrit servers, load-balancing* Knowledge base for all things related to Git. e.g. internals, workflows, etc.Tech Used: C, Perl, Java, Bash, Git, Gerrit, Gitolite, Repo, Apache, SSL Certificates, ldirectord, Linux Virtual Server, tcpdump, iptables, inotify, Jdb, Mysql, Moose (perl), Perforce

Naval Research Laboratory - Ocean Color / Remote Sensing Section* Led the effort to develop an operational capability for the high resolution optical channels of the MODIS sensor (residing on board NASA's Terra and Aqua polar orbiting satellite platforms).* Designed NRL’s ”Tactical Ocean Display System” - a monitoring center with real-time updated interactive displays showing selected oceanographic products in strategic interest areas. The visualization software uses OpenGL to accelerate image manipulations and a thread pool to parallelize image decoding.* Clustered satellite data processing system to perform calibration, atmospheric correction, scientific product generation, georectification, climatology, and image processing.* 3-Dimensional sub-surface optical modeling* Optical forecasting using Eulerian advection coupled with physical ocean models* Documentation of software and algorithms in technical reports* Presentation of research results at technical conferencesTech Used: C, Perl, Bash, Git, Fortran, C++, Ruby, OpenGL, PThreads, IPC, glib, Winelib, X11, Freetype, JPEG, PNG, TIFF, GeoTIFF, KML, IDL, HDF, Linux Clusters, Remote Sensing