Grails expert

Groovy expert

Hibernate expert

Spring Framework expert

Spring Security expert

Strong experience with server-side JavaScript (Node.js, MongoDB)

Extensive experience with JDBC and JEE technologies

Author of books on Grails and J2EE & WebLogic Server

MS in Mathematics

Harvard Instructor

Frequent conference speaker

Micronaut core team developer at Oracle Labs.

Backend Java and Kotlin developer

Made several enhancements to the PatientPing Master Patient Index (PMPI) clustering algorithm used to map patient data from multiple sources to a single person

Implemented a Quartz-based job scheduling service

Performance and scaling enhancements to the internal "Roster Tool" used to import large patient rosters from customers into PatientPing databases

Modernized build processes, updating from Maven to Gradle, upgrading from JUnit 4 to JUnit 5

Implemented internal versioned jar and NPM package publishing with Artifactory to replace existing fragile and buggy code sharing processes

Part of the development team implementing a large refactoring and enhancement project supporting the "Smart Roster" process

Mentored other developers

maintenance and enhancement of the open source tranSMART project

implemented continuous integration using Jenkins and Artifactory to run builds for all projects and publish JARs and WARs to custom Maven repos

converted a Spring Boot CITI Training REST API application created by developers at Boston Children’s Hospital to a Grails plugin to be able to integrate with tranSMART

Upgraded Grails from version 2.3 to 2.5.4, plus some design and code for an eventual upgrade to Grails 3 once incompatible app functionality was ready and remaining required external plugins were updated to work with Grails 3

Converted security from a highly customized implementation based on Apache Shiro to Spring Security, including permission-based access implemented with annotations and AST transformations to augment the traditional role-based approach

Refactored inefficient database access code and fine-tuned transactional behavior across the application

Reworked application GSP pages to move Groovy code into tag libraries and services

Performed significant code refactoring and cleanup

Unit, integration, and functional testing

Developed a large web service and several smaller supporting applications using Node.js and MongoDB to provide persistence, security, and application logic for iOS clients of a new, disruptive collaborative social application being developed for a client. Other work included client and server configuration and integration with real-time video and audio (RTMP) to support audio and video chat, video multicast, DVR and playback, using EvoStream Media Server, NGINX-RTMP, and Wowza Media Server.

Also added integration with 3rd-party services including Amazon S3, PubNub (for realtime chat and presence), and Twilio (SMS messaging).

Integrated several JavaScript libraries to implement application functionality, including Express (MVC framework), Mongoose (MongoDB ODM), GridFS (MongoDB distributed file storage), I18N, Passport (security), Winston (logging), Grunt (build), and extensive use of Mocha for a large suite of tests.

Implemented error notifications to Android devices using Google Cloud Messaging and a custom Android app.

Configured build and deployment process of the Node.js application at Heroku, and much of the configuration and testing of video servers and smaller Node.js applications for monitoring and autoscaling (custom implementations to handle the more complex issues related to upscaling and downscaling realtime video) at Amazon AWS.

One of two developers.

Wrote a live chat application using the Grails framework for web-based technical support.

Integrated Shibboleth-based authentication for universities in the InCommon federation to automate student enrollment verification.

Wrote significant portions of the Edhance web site, a new site that helps college students save money at participating merchants, including:

Senior developer for the CareTalks web application

Implemented much of the early development infrastructure including Subversion server over HTTP using Windows domain authentication, Cruise Control, Ant build process, unit test process, Spring and Hibernate configuration, and core code.

Implemented form-based application security using Acegi (Spring Security), and SSO using CAS and Acegi

Created a database upgrade facility to configure and apply DDL and DML scripts to any existing release version of a schema to update to the current version, including an event-based notification subsystem that was the prototype for an application-wide event subsystem.

Implemented I18N, extended to allow customized messages, images, and CSS for a hierarchy of customers both per-Locale and per-customer.

Data access development using Hibernate, JDBC, PL/SQL stored procedures.

Performance and scalability tuning, object caching.

Mentored other developers.

Lead developer at Primera

Wrote data analysis and visualization tool (a Swing-based desktop application using Spring and Hibernate) for Assay Development scientists that significantly reduced repetitive tasks and streamlined workflows.

Implemented enhanced algorithms for electropherogram peak detection and quantitation, enhancing or replacing those in the device software (GeneMapper).

Implemented data export to image files, PDF, and Excel workbooks with experiment data, summary charts, and statistical calculations that function as a report and as a "what if" analysis and prediction tool.

Created a web-based auto-analysis workflow tool that monitors electropherogram device output, generating initial GeneMapper analysis, then applying custom algorithms and exporting results to Excel. The autoanalysis application automatically creates a Wiki page with an analysis summary and the Excel workbook attached, as a form of electronic lab notebook.

Implemented application auto-update to ensure users have the latest version.

Implemented application access outside the firewall by tunneling database and file requests through SSH, including a SOAP web service to serialize Oracle queries to work around the known issue of Oracle’s thin driver’s inability to tunnel over SSH.

Purchased and configured development/bioinformatics/intranet servers running Fedora Core Linux, MySQL, Apache, CVS, Bugzilla (replaced with Atlassian JIRA), Wiki (Atlassian Confluence), Samba, SSH.

Implemented a web-based application for monitoring and administrating compliance and quality assurance, using Ajax, Hibernate, and Spring

Senior developer for the Global Trading System application, a WebLogic-based server application and Swing client for internal trading.

Refactored server-side event handling mechanism to batch logical groups of asynchronous events to accurately synchronize the client with the server and fix timing issues that resulted in temporary error states.

Various performance and scalability fixes and enhancements.

Developed an aspect-oriented performance and scalability monitoring framework for benchmarking.

Developed Swing panels and J2EE integration code for new FX (Foreign Exchange) trade editing functionality.