Building tools to support machine-learning and data science at scale. Designed many core systems, including two distributed job systems and the core API model. Led the creation of the reliability process and monitoring systems. Built tools to transport tabular and structured data between any combination of BigQuery, PostgreSQL, RedShift, cloud storage and flat files. Devote significant time to mentoring and project guidance.

Started a consulting business specializing in the design, implementation and marketing of online software. Recent projects include a browser-based media applications, two Android-based tools for use in patient rehabilitation, a hosted database SaaS application, a video encoding service, and a e-commerce site for online courses.

Developed a cloud-based system for converting arbitrary documents to PDFs, and created a fast client-side document viewer using SproutCore. Designed landing pages and advertising campaigns. Met with dozens of potential customers, including law firm partners and litigation support managers, to research their needs and buying behavior.

Acted as lead programmer for multimillion-dollar software projects involving 3D simulation and multimedia. Overhauled the technical interview process, and built a team of talented programmers and external consultants. Supported a team of multimedia developers. Worked with Dr. Henderson to develop state-of-the-art 3D training software and sharply reduced the technical risk and development costs of the existing project.Refactored and rewrote a 15-year-old multimedia engine to support many new features, including a fully-integrated 3D game engine, a gamma radiation model and an integrated development environment.Contracted with a wxWidgets maintainer to port Quake 2 engine to run as an embedded GUI widget. Added support for mixing 2D and 3D content on the same screen of our application. Worked with a specialist to develop a simplified model of gamma radiation and shielding, and modified Quake 2 to support the model.

Worked for a summer at the MIT AI Lab, where I helped enhance a compiler for Goo, a highly-dynamic LISP dialect.Designed a lightweight but powerful module system for Goo. Modified the compiler to support it by implementing separate namespaces, multiple-file output, demand-loading of modules at runtime and serialization of module data.Designed, implemented and tested code allowing Goo programs to recover gracefully from exceptions, using a Common LISP-like restart system. Added runtime support for interactive debugging of exceptions and restarts.

Started a business specializing in small-to-medium outsourced software projects for Unix and Linux. Worked with startups, small businesses and Fortune 500 companies to develop requirements. Successfully delivered fixed-bid projects on time and within budget. Subcontracted projects as needed.Designed, implemented and tested the "XML-RPC for C/C++" library for making remote procedure calls over HTTP using XML. Designed and implemented an extensive testing framework, including more than 1,000 test cases for 7,500 lines of code, with built in support for malloc debuggers and a pointer-access checker.

Wrote compiler primitives for embedded LISP compiler in TI320C40 assembly language. Booted Nucleus/PLUS real-time operating system on client’s custom hardware. Designed and implemented a high-level test library for the compiler using LISP macros.Designed and implemented a simple, packet-based protocol for communicating with semi-autonomous robots over serial radio modems. Wrote base-station drivers for Windows NT in C, and embedded drivers for the robots in LISP.

Developed code to represent and manipulate SGML using experimental DylanWorks compiler.