J C LAWRENCE PHONE: (408) 410-3632 EMAIL: claw@kanga.nu URL: http://kanga.nu/~claw/ J C Lawrence * Builds cost-effective massively-scalable systems. * Customer-oriented and results-driven with 10+ years of engineering leadership. * Full system and product life-cycle experience for both Software Engineering and Operations. YouSendIt - Campbell, CA Senior Staff Engineer, Storage Architect Dec 2009 - Jan 2012 * Architected and implemented scaling from ~1.5 million transactions/day and 500TB of storage to 25+ million transactions/day and 4PB of storage. * Led the reduction of transaction error rate by 80% and site escalations from 3/week to under 2/year. * Architected & implemented standardized engineering deliverables, build environments, build processes, product packaging, configuration management, and standardized deployment methods, initially for the storage tier and ultimately for all server-side products. * Built a strong relationship between Engineering and Operations at all levels. * Assorted technical deliveries: 64bit port of the storage tier, specified & moved the storage tier from DASD to a shared horizontally-scalable storage cluster model, re-implemented the storage tier as light-weight WSGI web services instead of a costly custom Apache module, multiple large customer saves for Sales and Customer Support, etc. Skills used: Apache, Apache modules, API design, AWS/S3, build & release, C/C++, concurrent programming, engineering lead, distributed systems, GPFS, incident response protocols/teams, gevent/libevent, Luwak, master-less clusters, PDLC and engineering process, product architect, Python, Riak, SaaS, scalability, schema-less/no-SQL databases, storage systems & networks, technical leadership, web services, WSGI, virtualization and VM-based clusters PayPal - San Jose, CA Lead Engineer, Manager, Product Architect June 2005 - Nov 2008 * Acted as lead engineer and manager for the Developer Services team, responsible for the PayPal web-services platform ($30B+/year), IPN (API callbacks) and Sandbox test systems. * Re-implemented merchant APIs to use name-value pair POSTs instead of SOAP. Within 6 months two thirds of all new merchant integrations were using NVP. * In parallel with the payment-method development teams, rewrote the web-services platform for all payment and merchant APIs, moving it from a monolithic CGI-BIN/server pair to a light-weight dispatcher model routing requests to business-logic servers with good code & deployment isolation. * Led the rollout of the new web-services tier with no unplanned downtime or lost transaction volume. * Moved the Sandbox from a 4-system cluster in San Jose to a 100-system cluster in Denver. * Acted as lead engineer and manager for the Merchant On-boarding team, responsible for merchant-acquisition and merchant-configuration systems. Built and trained the QA team for my group. With a local team and a team in India delivered over a dozen features including rewriting the boarding flow with a 70% reduction in fall-off rate, hierarchal sub-account management and channel boarding APIs. * As Product Architect for the internal "TurboRoller" release-orchestration tool, developed and got funded a full web-services/work-flow based replacement architecture with a roadmap to get there from the current system. * Part of the team that implemented STSI, a rescue re-architecture when internal or external dependencies fail, including the site's Oracle database (which was near crashing from load). I was responsible for parts of the payment methods and the daemon that replayed transactions received during the outage. * Recognized for exceptional ability to work through others and consistently moving the company forward to both fix the problem and ensure it didn't recur. Skills used: Apache, product architect, business coordination, C/C++, distributed systems, engineering lead, manager, offshore engineering coordination, security analysis, technical leadership, web services, workflow automation Pfizer Research & Development - Groton, CT Product Architect, June 2003 - May 2005 (contract) * Wrote and executed massively parallel custom applications to analyze -omics data (proteinomics, genomics, etc). * Using Open Source tools and components, designed and delivered an agent-based distributed heterogeneous computational router/framework for non-programmer computational statisticians to express common computational methods and non-statistician/non-programmer research scientists to use work-flow tools to assemble & use those methods for their research analysis. * Collaborated on distributed computational statistics projects for Pfizer with research groups at Yale and Seattle universities. Skills used: academic partnerships, architect, ad-hoc heterogeneous clusters, distributed computation, distributed systems, message busses, message passing networks, parallel computation, performance analysis, Python, scientific computing, tuple spaces, web services, workflow automation, virtualization, XML, Zope Protego Networks - Milpitas, CA Systems Architect, August 2002 - February 2003 * Designed and implemented logic core of product (aggregation and near-realtime distributed analysis of distributed network events, 20K events/second per node). Patents granted. Primary skills used: algorithm design, architect, C++, distributed systems, engineering lead, high performance systems, Linux, micro-language design, parsers, scalability, security analysis, SSL, XML Sun/Cobalt - Santa Clara, CA Staff Engineer, April 2002 - July 2003 (contract) * Implemented support for new Squid features and transferred maintenance to in-house staff. Skills used: C/C++, Linux. PHP 2Wire - Milpitas, CA Senior Staff Engineer, April 2001 - December 2001 * Reverse engineered and implemented proprietary VoIP protocols (Dialpad). * Implemented POSIX thread support under pSOS Skills used: C/C++, distributed systems, pSOS, SSL, VoIP, POSIX, reverse engineering, security analysis Maxtor, Network Services Advanced Technology Group - San Jose, CA R&D Team Lead, December 2000 - March 2001 (contract) * Lead R&D team & researched and advised on future NAS and storage technology directions. Skills used: algorithm design, architect, C/C++, engineering lead, performance analysis, project management, Python, reverse engineering, technology evaluation Nuron - Santa Clara, CA Senior Staff Engineer, August 2000 - November 2000 (contract) * Assisted in design/development of a Linux-based FPGA-based memory-module device driver aimed at the SSL acceleration and image processing markets. Skills used: apache module, architect, cryptography, C/C++, device drivers, Linux kernel, performance analysis, Python, security analysis, SSL Critical Path - San Francisco, CA Senior Staff Engineer, October 1999 - July 2000 (contract) * New product development relating to MIME and Document Object Model (DOM) support for Critical Path's core webmail product. Skills used: Apache, C/C++, Linux, Perl, Python, Solaris, SQL, XML VA Research/VA Linux - Mountain View, CA Senior Staff Engineer, Project Manager, February 1999 - October 1999 * Project manager and coordinator for the Linux/IA64 project (porting Linux to Itanium/IA64). * Established seven-company consortium for that project (CERN, Cygnus, HP, IBM, Intel, SGI, VA). * Drove development efforts from two months behind schedule to over three months ahead of schedule in less than 6 months. Skills used: C/C++, engineering lead, Linux, Linux kernel, project management, PHP, Python, SQL