A "full stack" senior engineer with extensive experience in software architecture and design, including:

• Specialties: Back-end system architecture, design and implementation; service-oriented architectures
• Languages: JavaScript (7+ years experience), Java (10+ years), SQL (15+ years), CSS, C++ and C
• Software: Node.js, Redis, jQuery, Bootstrap
• OS: Linux, Windows

DataXu, Inc. Boston, MA. Principal software engineer. October 2017 to May 2019. Senior developer in DataXu's CMS group, which maintains the central metadata database and API, and drives bidding on advertising for the web (and now for television). CMS is in a multi-year process of moving to a new object model, which requires many changes to the database schema and the deployment of new APIs. Key projects included:

• Co-leader of a migration to a new vendor of geographical data, a large multi-phase change which crossed all internal groups and had to be performed in real time while user transactions were in flight.
• Designed and implemented many large Postgres migrations to a new schema. Wrote the views and triggers necessary to support the transition periods.
• Implemented the initial version of the "contract" API, which is a central object in the new design. Expanded much other database work as well.
• Implemented a job to poll a vendor API for changes in advertising "segment" definitions, and update Postgres and Elasticsearch indexes.
• Implemented many other small migrations and API changes.
• As one of two Postgres specialists in the group, I was also responsible for implementing and/or reviewing database changes for other developers.

Welltok Campaign Services (formerly Silverlink Communications), Burlington, MA. Principal software architect. May 2008 to September 2017.
Developed several key parts of Silverlink's ACUMEN platform, which manages communications for the health care industry; it automates integrated campaigns that can include voice calls, web sites, and interfaces to SMS, e-mail and postal mail services.

• Lead designer and implementor of the Executor, a Node.js-based engine for executing new digital communication channels. Features include a scalable, plug-in architecture that allows end-users to design programs transparently integrate with APIs; for example Twilio (for SMS messages), Sendgrid (for e-mail), and Qualtrics (for web surveys).
• Implemented OAuth 2.0 / OpenID Connect support for our new REST API offering
• Designed and implemented a web-based graphical editor enabling users to design their own campaign workflow, and then monitor the campaign after launch. Used HTML5, SVG, JavaScript, jQuery, Bootstrap on the front end, and SQL Server stored procedures to implement a REST API on the backend. Introduced a new “modern” look that has since been adopted across the product line.
• Designed and implemented web services to support new mobile and desktop websites; these services integrate seamlessly with the existing ACUMEN platform. Developed the initial mobile website prototype.
• Designed and implemented a web services interface to support the Call Control Dashboard, which allows customers to continuously monitor dozens of ongoing call programs and change their schedules as necessary.
• Led the project to enable integration of external communication and data services with our platform, including SMS and e-mail.
• Added features to our existing voice platform, which uses VXML and CCXML (W3C telephony standards) to send and receive voice calls.

Putnam Investments, Boston, MA. Consultant, May 2005 to May 2008.
Lead engineer for Putnam's in-house risk calculation engine. The system performs factor-based risk calculations for equities, bonds and derivatives.

• Lead the rewrite of the system in Java, running on Linux and using an Oracle database. The system uses Tangosol and DataSynapse grid technologies.
• Extended the existing risk system in several ways, including: adding new types of complex derivatives, issuer correlation and support for an unlimited number of risk models.

TripAdvisor, Inc., Needham, MA. Senior Software Engineer, June 2004 to May 2005.
TripAdvisor.com is one of the most-visited travel sites on the web. I was part of a small team of engineers responsible for the software that ran this complex site in its early days. I was one of two engineers who implemented its first photo-upload capability. The backend was written in Java, and is backed by lots of open source: Linux, Tomcat/Apache and Postgres.

Fidelity Investments, Boston, MA. Contractor, March 2001 to June 2004.
Designed and implemented software for Fidelity's Image Management system. The system currently stores over 170 million images and web pages. My many projects included:

• Member of the core architecture team that designed and implemented a new suite of image-based web services, using Java, XML and Websphere on a Unix server.
• Designed and implemented programs that used messaging (IBM MQ Series) to update and verify a large mainframe database from multiple Unix servers. Written in C++ with embedded SQL on the Unix side.

Mesa Systems International, Inc., West Warwick, RI. Consultant, various times from 1991 to January 2001.
Mesa produced Mesa/Vista, a high-end intranet portal for project management.

• Designed and implemented an "application link" Java Servlet from Mesa/Vista to ERwin, a data-modeling tool; used Java, C++, Perl, XML and Microsoft COM.
• Designed and implemented a data extraction module for a third-party tool in TCL; this project was successfully completed on a very short deadline, despite no previous experience with the tool or TCL.
• Developed an application that displays existing Microsoft Project applications on the Web, from either a file or an ODBC source. Recently updated to support the new Project 98 format. Written in C++, developed on NT.
• Developed an application link from Microsoft Project 2000 to Mesa/Vista.
• Primary developer of a new product that supports highly configurable PostScript output for a variety of CASE tools, particularly Cadre's TeamWork product (see below). Written in C.

Northern Light Technology, Inc., Cambridge, MA. Consultant, 1998 to July 2000.
Performed various database-related tasks for this Internet search startup, including:

• Implemented a document-tracking system in Perl. The system was used internally to track documents over their lifecycle; the database contained over 25 million documents.
• Designed and implemented a royalty reporting system which was used for several years.

LitleNet LLC (later OrderTrust), Lowell MA. Consultant, May 1996 to October 1997.
OrderTrust provided back-end e-commerce services, including order management and credit-card processing.

• Designed and implemented the TCP Communicator, an application for sending and receiving electronic commerce data over TCP sockets. The program is highly configurable, so it can be used to communicate with various clients, each with their own specific protocol. Implemented in C++ on Unix (Solaris).
• Designed and implemented generic Staging and Scheduling services.
• Implemented C++ object interface over SunOS and Posix thread libraries.

Before 2000, I worked for many other companies, including Keystone Investments, Atex, Cadre Technologies, and Higher Order Software. Contact me for details.

Massachusetts Institute of Technology, Cambridge, MA.

• S.B. in Computer Science and Electrical Engineering. Concentration (similar to a "minor") in linguistics.
• Thesis investigated computer support for group work.
• Completed several graduate-level courses in artificial intelligence and expert systems.