2010 — 2011

SiXiTS, senior software engineer

• Scala MMOG Server development with JSON, MongoDB, MySQL, Struts2, Tomcat, and FTL.
• Server is currently used for the Facebook game Babies Everywhere. http://apps.facebook.com/babieseverywhere
• Created the quest system (known as Activities) with extensive usage of MongoDB.
• Created the online payment integration with reliable postback handling.
• Created the item state machine representation used for all stateful in-game items.
• Created a JSON update mechanism for pushing data model updates to the client.
• Created a digital asset migration system for deploying newer content to other instances.
• Technologies: Scala, JSON, MongoDB, MySQL, Struts2, Tomcat, FTL

2009 — 2010

E*Trade, principal IT architect

• Developed an ANSI C and Erlang server to replace installations of BEA Tuxedo.
• Modifications improved scalability by eliminating global state and added robust timeout/error handling.
• All changes conform to common Erlang development techniques and make the system maintainable.
• Technologies: ANSI C, Erlang

2008 — 2009

Nokia, senior software engineer

• Created an integration-testing framework for validating two separate XMPP servers to determine compatibility problems.
• Used C++, log4cxx, cppunit, boost::asio and iksemel.
• Developed Erlang XMPP server code to provide features found in a legacy XMPP server.
• The Erlang server modifications made the transition transparent to the legacy clients by ensuring protocol compatibility.
• Created a Messaging Bridge for publishing data updates to internal web services.
• Created an efficient accounting log system for tracking server utilization.
• Automated Erlang server initialization code for cluster deployment and data replication.
• Modified an Erlang Distributed Hash Table (DHT) implementation to provide fault-tolerant key timeouts for both the Java and Erlang API.
• Certified for Erlang OTP development by Erlang Solutions, Ltd. (http://erlang-solutions.com/) after instruction from Jan Henry Nystrom.
• Technologies: C++, log4cxx, cppunit, boost::asio, iksemel, Erlang

2005 — 2009

PortfolioWatcher, LLC, co-founder

• Created an Internet start-up with a private investor to provide an investment tracking service using rule-based email alerts.
• Used PHP, Perl, and MySQL to create automated portfolio management.
• Developed a stock comparison program using Python, Qt, Qwt, curl, and SQLite for financial technical analysis acting as a subscriber to free daily financial price quotes over HTTP.
• Technologies: PHP, Perl, MySQL, Python, Qt, Qwt, curl, SQLite

2007 — 2008

Sony Pictures Imageworks, senior software engineer

• Developed bug fixes and features for an Image and Movie viewer using C++, Python, and Boost.
• The viewer has remote synching capabilities as a server or client and is a subscriber to digital asset information through SOAP RPC.
• Used in India and Los Angeles throughout the pipeline, from the Animators to the Directors.
• Modified to allow different resolutions and different media types for remote sessions.
• Added annotation features that improved various parts of the pipeline.
• Added audio/video sync calibration feature that solved longstanding lip sync problems.
• Created a reusable, cross-platform point placement tool for manually manipulating motion capture data.
• Was required within 4 days and was delivered successfully on both Linux and Windows using Python, PIL, and Py2exe.
• Later became part of Locus, a motion capture tracker system. Was used for the face of Dr. Manhattan in the film “Watchmen”.
• Created a testing framework for cutlist generation to ensure data integrity with regression testing.
• Maintained various C++ libraries, adding bug fixes for 64bit compilation, media formats, and business logic. Provided substitutes for a legacy libSpBase library to aid future code development.
• Technologies: C++, Python, Boost, PIL, Py2exe

2006 — 2007

Perpetual Entertainment, platform & server core software engineer

• Critical development tasks enabled the sale of the Platform/SDK to BioWare and the Platform/SDK continues to be sold by PlayGrid. (http://www.playgrid.com/)
• Lead developer for the C++ Platform middleware (PEPSDK), a vital cross-platform API that facilitates the Platform as a N-tier architecture.
• Coordinated many feature and protocol additions by making the necessary changes within the PEPSDK, game server and game client.
• Developed the PepPublisher, a game server process used to report game content and persistence data to the Platform for real-time updates of a player’s progress within the online game.
• Fixed many elusive multi-threading/distributed race conditions and deadlocks within the game server and PEPSDK to improve game server stability.
• Created a socket connection thread pool that enforced a real-time Quality of Service with limited memory consumption for efficient XMPP chat communication.
• Designed to be protocol agnostic.
• Created a distributed integration-testing framework for game server and client functionality.
• Added localization to PEPSDK API and data structures, including regex functionality.
• Technologies: C++

2002 — 2005

Signature Research Inc., software engineer

• Developed a physics-based global illumination renderer and ray tracer for army test and evaluation programs.
• Included 3 distributed systems that were cross-platform and multi-threaded.
• Used an actor model that conserved memory and avoided global state. Included C++, Boost, MPI, and UML.
• Designed and implemented efficient object communication routines via message passing, distributed memory management with throttling, a spatial partitioning structure, a custom file based database used to manage intermediate results, utilized various design patterns, etc.
• Performed all Linux debugging. Used gdb, ElectricFence, TotalView, Purify.
• Worked on the project (EOView) from conception to ship date.
• Increased the efficiency of RenderView, a Windows physics-based ray tracer written in Visual C++, by at least 10 times after researching, implementing, and testing a spatial partitioning algorithm.
• Converted a legacy physics-based global illumination renderer that was written for the SGI with IRIS GL and Fortran 77 to Linux with OpenGL and C.
• The result was a stable cross-platform version that was able to use dynamic memory allocation, exceed previous polygon limitations and was approximately 6 times faster when using hardware acceleration.
• Maintained and improved PRIMUS, a Visual C++ Windows OpenGL 3D model viewer and conversion tool that aided in-house integration of two physics-based thermal signature prediction programs.
• One improvement made it 9 times faster to import MUSES thermal signature files through a more efficient algorithm that used caching and a dynamic lookup.
• Planned, installed, and configured an 8 node supercomputing diskless cluster for distributed development.
• The High Performance Computer (HPC) was easily expanded to a total of 16 nodes.
• Technologies: C++, Boost, MPI, UML, gdb, ElectricFence, TotalView, Purify, OpenGL, C

OS, Tools, Libraries

Ubuntu/Centos Linux, OSX, OpenBSD, Windows, git, subversion, cvs, Perforce, Source Off-Site, Boost, sockets, OpenGL, Qt, pthreads, MPI, OpenMP, MongoDB, Postgres, MySQL, SQLite, TokyoTyrant, memcached

Languages

C++/C, Erlang, Python, Scala, Java, Ruby, SQL, UML, regex, bash/csh

Paradigms

Cross-Platform, Publisher/Subscriber, Actor Model, Multi-Threaded, Distributed Systems, Remote Procedure Call (RPC), Parallel Programming