Jonathan Clark Email & Phone Number

Edmonton, Canada Area

San Francisco Bay Area

· Architected a general-purpose C/C++ source code instrumentation framework, which performs automatic build-time source code text transformations using information from an abstract syntax tree, while leveraging existing C/C++ compiler frontend and build system integration components.· Created wait-free, async-cancel-safe parallel algorithms for safely and efficiently storing dynamic analysis data inside shared memory data structures, using compiler intrinsics, Posix IPC, and Win32 API.· Designed a next-generation coverage tool, using the source code instrumentation framework, to collect test-separated coverage data from large distributed test environments over a network connection.· Provided technical leadership to a team of 4 engineers in the implementation of the source code instrumentation framework and next-generation coverage tool.· Contributed heavily to those implementation efforts, using C, C++, SQL, Unix, and Win32 API.· Delivered the source code instrumentation framework and coverage tool successfully and on-schedule, for Linux with gcc, and Microsoft Windows with Visual C++.· Drove coverage tool performance optimization efforts, ultimately achieving a 3.6% total overhead,comparing favorably against 5× overhead for competing coverage tools in the same scenario.· Invented a method for remotely separating test coverage data from long-running processes, without requiring customer source code changes or process restart, using pthreads and Win32 API threading.· Collaborated with legal representation to complete a provisional patent application for the invention.

Calgary, Canada Area

· Implemented a server for collecting gcov coverage data over a network connection, in collaboration with 2 other developers, using C++ and Unix, following a 100% line coverage policy.· Created testing tools for synthesizing network data and simulating clients, accelerating coverage server test development and improving implementation quality.· Designed coverage data caching algorithms, informed by conducting experiments using real and synthetic cache access traces with cache simulators, reducing server-side disk accesses by 99%.· Owned the coverage server performance optimization effort, achieving a 3× speed-up over filesystem gcov coverage, using a measurement-driven iterative process.

Edmonton, Alberta, Canada

- Updated and deployed a prior course project, a web application for undergraduate program planning and advising, using Python, Pyramid, SQLAlchemy, Chameleon, Ubuntu Server, and Nginx.- Created project plan, including budget and milestone schedule, and successfully delivered project pitch and funding proposal to the director of Academic Information Systems.- Refactored an existing 14,000 line Python web application to improve security and maintainability, while performing an exhaustive security audit and source code review.- Implemented significant performance improvements, including a 30 times speed-up retrieving student program plans and computing graduation eligibility.- Redesigned application user interface to correct 108 defects observed during a previously-conducted user study, along with additional refinements from hallway testing with 10 potential users.- Integrated web application with externally-controlled LDAP directory and OAuth user authentication.- Presented works-in-progress monthly to stakeholders, including the Vice Provost of Information Technology, the director of Academic Information Systems, the Associate Chair of Undergraduate Studies for Computing Science, and representatives from the Office of the Registrar.

Edmonton, Alberta, Canada

- Developed and delivered a web-based educational game for touch-enabled handheld devices, for teaching English as a Second Language (ESL) to Japanese middle school students, using Java and Google Web Toolkit, while coordinating with another research assistant.- Gathered functional requirements from three Computing Science professors, one Education professor, and two Education graduate students, for a web-based educational game.- Created 17 customizable mini-game templates, and provided the tools for educators to modify the game for different subjects and types of questions.- Evaluated the educational effectiveness of the game by conducting user studies, including play sessions, focus groups, and private surveys, with four groups of four Japanese primary and secondary school teachers.- Updated the game to prepare Alberta ninth grade students for general science examinations.- Assisted three graduate students with graphics and data visualization research by implementing rendering techniques for three types of stereoscopic displays, including 8-view lenticular autostereoscopic, 5-view parallax barrier autostereoscopic, and various anaglyph filters, using C++, OpenGL, and GLSL.- Updated and maintained a legacy JavaScript multi-media web application for Alberta high school test administration and test preparation for all academic subjects.