Software Architect & Developer

Feediator is a fully responsive and mobile ready web-based RSS Feed Aggregator. Feediator is built using HTML5, CSS3, SASS, jQuery, Handlebars, Node, Express, and MongoDB.

jekyll.johnvincent.io is the V1 version of my Website featuring a Portfolio and Blog. It is built using Jekyll, HTML5, CSS3, Bootstrap, SASS, and jQuery.

Architect and Lead Developer, managing all technical aspects of the build and rollout of a new, feature-rich corporate, Rental Equipment website that resulted in a 68% increase in rental revenue.

Architect and Lead Developer, managing all technical aspects of the build and rollout of an automated application to find and report database replication issues. Resulted in client reported issues being reduced to zero.

Architect and Lead Developer for 2 SPAs using Backbone, HTML5, CSS3, JavaScript, jQuery, Jasmine, Responsive, SASS, Java Restful Web Services, and Adobe AEM.

Led hertz.com migration to latest versions of JEE, Java, DB2, and WebSphere.

A Task Management Productivity application, TaskMuncher is a fully responsive, Progressive Web Application (PWA) built on the MERN stack using React, Redux, Material-UI, Node, Express, and MongoDB.

Use TaskMuncher to organize and keep track of everything so you can get it all done and enjoy more peace of mind.

MyTunes is a folder music player.

MyTunes is the easiest way to play music stored on your local drive.

Use MyTunes to organize your music any way you prefer.

Gomoku is a responsive, Progressive Web application version of the popular Gomoku game built using React.

Players alternate turns to place a stone of their color on an empty square.

The winner is the first player to form an unbroken chain of five stones horizontally, vertically, or diagonally.

Hangman is a responsive, Progressive Web application version of the popular Hangman game built using React.

Yahtzee is a responsive, Progressive Web application version of the popular Yahtzee game built using React.

Lights Out is a responsive, Progressive Web application version of the popular Lights Out game built using React.

Github helper is a responsive, progressive web application that provides useful information about Github users.

It is built using React, HTML5, CSS3 and SASS. It is deployed to Digital Ocean using Ubuntu and Nginx.

Feediator is a web-based RSS Feed Aggregator. Keep up to date with the latest news from the publications you trust. Follow blogs from the movers, shakers, and thinkers.

The website describes my Services, Portfolio and Blog.

A website to display internet resources I have found very useful in my roles as an Architect and a JavaScript Full Stack Developer.

It is built using Bootstrap, HTML5, CSS3, SASS, jQuery, JavaScript and is deployed to Digital Ocean using Ubuntu and Nginx.

A magnificent art museum and collection at your fingertips.

See some of the wonders of the art world.

It is built using HTML5, CSS3, SASS, JavaScript, jQuery and is deployed to Digital Ocean.

Play Peg Solitaire with this web-based implementation.

Drag and drop with helpful hints or let the game show you solutions.

Play Sudoku Solver and Generator.

It is built using Java Swing.

Play Gomoku (Five in a Row).

It is built using Java Swing.

Recursively Compare Directories.

It is built using Java Swing.

Explore the contents of a file.

It is built using Java Swing.

Visual Grep Utility, simplifying the search.

It is built using Java Swing.

Senior Architect, Team Leader and Lead Developer of a rental equipment website. A feature-rich application suite which among its many features allows members and retail users to reserve and/or buy rental equipment. It integrates with internally hosted counter systems for real-time customer and equipment information, rental rates and reservations for the US and other countries, real-time customer financial reporting, fleet management and reporting, KPI and up-to-date equipment sales information. An Administration web application manages all aspects of the application including users and groups, privileges, user data, equipment, and accounts. The Batch Job Scheduler web application manages a large number of batch jobs that are an integral part of the application suite. Fully localized and weighs in at over 1 million lines of code.

DB2 data is replicated between 3 data centers. Reports from users of data loss would be received. Each report would have to be investigated and resolved, taking large amounts of development time. A replication problem that is not immediately resolved can spiral into a large data loss. Replication problems were frequent and only apparent when reported by a user. A quality and cost problem.

Designed and built an application that retrieved all data by Database table from each of the data centers and compared them. Any differences were reported to the job log. Implemented as a job run by the new Job Scheduler where any failed job would immediately notify web operations of a failure.

Any replication problem was immediately reported to web operations and the DBAs who were able to quickly make a fix.

Architect and Lead Developer for 2 SPAs using Backbone, HTML5, CSS3, JavaScript, jQuery, Jasmine, Responsive, SASS, Java Restful web services, and Adobe AEM. Fully responsive and mobile ready, utilizing Application Caching installs as an application on a mobile device. Fully functional without network access.

The SPAs use the identical code base with different CSS, content, and catalogs.

Deployed using Akamai, Apache, and WebSphere.

The applications were now using 20+ repeating batch jobs that were mostly run at night. The batch job application had very poor error handling and error reporting capabilities. The hardware was outmatched which caused near constant job failures. Investigating the failures and managing the tool so it eventually got the jobs done was consuming maybe 15% of my teams' effort.

I designed a JEE application in 3 pieces.

- Administration application to administer all jobs. Jobs could be added, updated, deleted, started or stopped by the admin application. All jobs provided messages for its own job log which was viewable from the administration application. All server logs are viewable from the application.

- A job engine which is responsible for running the jobs. Jobs are run according to their own schedule. The engine was responsible for handling jobs that failed.

- The jobs themselves. They are built on a standard framework so they all behave the same way.

The Administration application uses JEE, Java, Struts 2, JSP, HTML, CSS, Quartz, DB2, XML.

The Jobs engine uses Quartz, JEE, Web Services, DB2.

The jobs themselves are implemented as Web Services with a custom interface to ensure compliance.

Everything deployed to WebSphere running on Linux servers.

The administration of the Job Scheduler was handed over to the Web Operations Group.

Running of batch jobs became more predictable. When a job failed, a web operations person could identify the problem and restart the job.

The error reporting now allowed for all errors to be reported in logs that were easy to find. It allowed for a quick diagnosis of the problem. All problems were tracked.

In a short period of time, I was able to use the application and it’s error logs to prove to the business that the hardware was insufficient. This data was used as financial justification for new hardware.

With the upgraded hardware the problems and the amount of team effort consumed were reduced to almost zero.

Hertz Rental Cars were using an outdated version of WebSphere. It would soon be off maintenance, it lacked features, wasn't being updated and was a liability.

I built a WebSphere configuration framework using Jacl and a Java Swing application to configure and manage the server and workspace configurations. This enabled for the quick, reliable and predictable construction of complex WebSphere servers, thus enabling the JEE migration to proceed smoothly. All code was updated to the latest versions of Java/JEE and WebSphere.

All e-commerce websites were built-on and deployed to up-to-date WebSphere servers, increasing reliability and maintainability of all websites.

Built a web enterprise application framework and many websites from that framework. Used a CMS, Java, JSP, Struts, J2EE, HTML, CSS, WebLogic, Ant and Eclipse.

Built a Supply Chain application using JEE, Java, Struts, JSP, Session Beans, MDB, EJB, JAX-RPC, JNDI, JDBC, JMS, Connection Pooling, SAAJ, SOAP, WSDL, XML, XSLT, Ant, Oracle, Oracle PL/SQL, Rational Rose, SunOne Application Server, Web Services, JSTL, EL, Custom Tag Libs, Custom JSP Templates, HTML and CSS.

Built MVC JSP Online Store and ported it to WebLogic and WebSphere. Built using JEE, Java, Struts, EJBs, and JSPs. Used an Oracle database with Stored Procedures and Connection Pooling.

Built a Client/Server Scrabble Game which is a Sockets, multi-threaded, graphical Java Swing app.

Coursework focused on Java, JEE, Web Services, Databases, Internet Technologies, Systems Development and Conceptual Design.