Worked on the AdWords front-end.

Member of Turing award winner Alan Kay's research group, which was working on an NSF-funded project called Steps Toward the Reinvention of Programming (STEPS) ­ an attempt to implement "personal computing" in under 20k LOC. My research aimed to provide new, often domain-specific, programming language constructs that would help minimize the system's size and complexity. I designed and implemented OMeta, a programming language that enables rapid prototyping of new programming languages. (In less than 500 lines of OMeta code, I implemented a subset of JavaScript that was complete enough to run an early version of Sun's Lively Kernel project with decent performance!) OMeta has become a popular language implementation tool, and is currently being used in many projects outside VPRI. I also designed and implemented a new low-level language that supports garbage collection and dynamic compilation; the back-end of this language produces efficient 32- and 64-bit x86 code (joint work with Stephen Murrell).

Taught weekly discussion sessions for a Programming Languages course that introduced students to the functional, object-oriented, and relational paradigms. The languages discussed were OCaml, Scheme, Smalltalk, Java, Python, and Prolog.

Implemented Transact-Secure, a system that verifies the identity of consumers during online and MOTO transactions using data provided by credit bureaus like Equifax and Experian. The system was written in C and PHP (lots of CGI programming), used a MySQL database, and communicated with the credit bureaus using XML messages. Verid has since been acquired by RSA, and this product is now called RSA Identity Verification.

Extended UCB's implementation of the Virtual Interface Architecture (VIA), which involved hacking on the Linux kernel and device drivers for high-performance networking hardware.

Enhanced AT&T's Restoration and Provisioning Integrated Design (RAPID) application, responsible for the self-healing properties of AT&T's network. Implemented an interface through which network engineers can monitor virtual network links, an important abstraction used by the routing algorithm. The work included writing C++ code for accessing persistent database objects through an Object Request Broker (ORB), and extending the system's GUI, which was written in Java, to provide access to this new functionality.