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Jeff Marin, Software Developer in Lake Mary, FL, United States
Jeff Marin

Software Developer in Lake Mary, FL, United States

Member since May 23, 2014
With 30+ years working as an engineer, project manager, and director, Jeff is able to combine exceptional communication skills with superior technical abilities. While working in the high-tech, financial, entertainment, manufacturing, and medical industries, he has built a large store of knowledge.
Jeff is now available for hire



  • Java, 14 years
  • JavaScript, 13 years
  • MySQL, 10 years
  • C#, 7 years
  • C++, 7 years
  • C, 5 years
  • Node.js, 3 years
  • MongoDB, 2 years
Lake Mary, FL, United States



Preferred Environment

Eclipse, Visual Studio, Git

The most amazing...

...thing I've built is the iRise Importer. It works by injecting introspective JavaScript into any existing webpage through an embedded browser.


  • Chief Architect

    2015 - PRESENT
    BioReference Laboratories
    • Worked with a genetic counselor to implement family history-based rules within the Drools Rules Engine. Rules include heath insurance coverage.
    • Created a JSON web service to accept family tree information and output rules triggered, recommended genetic tests, and health insurance coverage.
    • Created a front-end application to allow genetic counselors to create, test, and modify rules. The application includes a pedigree chart using GoJS and a rules editor using AceJS.
    Technologies: Drools, J2EE, Ext JS, GoJS, AceJS, MySQL, Tomcat, Jersey
  • Chief Architect for Platform Engineering

    2018 - 2018
    • Created direction and documentation for a serverless architecture that complied with twelve-factor app mandates.
    • Implemented and deployed Spring ConfigServer and other Spring Cloud Technologies.
    • Modified existing and created new pipelines in Concourse CI.
    Technologies: Docker, Docker Compose, Concourse CI, SpringBoot, Java
  • Chief Architect

    2016 - 2017
    • Designed and implemented Insights, a warehousing engine to provide teachers, admins and parents advanced analytics.
    • Created microservices for front-end developers.
    • Created extremely complex ad-hoc MySQL queries to control ordering and record selection.
    • Created and ingested AWS SQS messages.
    Technologies: Node, MySQL, ES6, AWS, Warehousing, Analytics
  • Chief Architect

    2015 - 2015
    • Created dozens of web crawlers utilizing Node.js and AWS Lambda. Implemented the web crawlers to parse APIs and raw HTML results.
    • Created a Chrome extension to query LinkedIn via Google (XRay Search) and create candidates for potential inclusion within the End-User ToutApp sales campaign.
    • Worked with a 500 node proxy server pool to parallel process LinkedIn XRay results.
    • Created a front-end application in Node.js and Express.js to monitor web crawler status.
    • Utilized the Node.js CRON library to schedule daily and weekly web crawlers.
    Technologies: Node.js, AWS Lambda, MongoDB
  • Senior Architect

    2014 - 2015
    veEDIS Clinical Systems - Toptal
    • Converted home-grown rules-based architecture to Drools standards.
    • Converted rules (over 500) to the Drools Rules Language.
    • Added state of the art subject matter expert rules editing tools.
    • Created custom accumulators for medical scoring rules and added the ability to perform longitudinal medical rules.
    • Added mapping to SNOMED, RxNorm, and other medical standards.
    Technologies: JBoss Drools, J2EE, Ext JS, Jersey
  • Consultant

    2014 - 2014
    Amazon Web Services
    • Created a Windows client to communicate with Amazon AppStream server applications. Client included customized captions using windows non-client messaging. Customized DirectX implementation to display low network levels.
    • Worked on an AppStream Android client. The solution included JNI/NDK interface with AWS DLLs and GLSurfaceView implementation.
    • Created a customized AppStream Eligibility Server. Both clients communicated with the eligibility server for authorization and available AppStream applications. Both clients monitored network latency, download speed, dropped frames, and displayed warnings when stats were below minimum acceptable levels. Both clients submitted survey results to Kinesis service.
    Technologies: Java, JNI, AWS, AppStream SDK, C++, Android/ADK/NDK, Eclipse, Visual Studio, Jetty
  • Director of Accelerator Products

    2008 - 2014
    • Designed, implemented, tested, and maintained a suite of products to complement iRise core products.
    • Created iRise CodeGen which creates software code from iRise simulations, reducing customer efforts to create code by up to 70%.
    • Created iRise Importer which converts existing web pages to iRise simulations, reducing customer efforts by up to 90%.
    • Worked on project management, technical architecture, and application development.
    • Worked on iRise Adoption Center and connectivity products to Requirement Management Systems, including HP Quality Center, and Borland Caliber.
    Technologies: JavaSE, Java Server Pages, Apache Tomcat, MySQL, JavaScript, JxBrowser, Maven, JIRA, Agile
  • Project Manager/Enterprise Architect

    2007 - 2008
    • Created Synapse, a rule-based web application to determine insurance reimbursement eligibility in real-time.
    • Provided project management, technical design, and application development services.
    • Synapse allowed medical, non-technical personnel to enter complicated medical eligibility rules, through a simple to use web interface.
    Technologies: Biz Talk Server, BRE, .Net (C# and VB.Net), SQL Server, Telerik, JavaScript/Ajax
  • Project Manager/Senior Software Architect

    2006 - 2007
    • Worked on new front- and back-end architecture, to increase revenue from Norton customers.
    • Provided project management, technical design, and application development services.
    • Worked on Norton presentation layer and website storefront back-end code.
    Technologies: IBM Websphere, Java, EJB, Hibernate
  • Senior Software Architect/Technical Liaison

    2006 - 2006
    • Assisted Yahoo Search Marketing in rolling out Panama SDK to their multi-million dollar Yahoo accounts.
    • Traveled through the US, visiting key customers and helping them with software implementation and deployment issues.
    • Prepared Yahoo/Google Internet Ad implementation comparison read by Jerry Yang, CEO.
    Technologies: Web Services,. J2EE, .Net
  • Sr. Software Architect

    2005 - 2006
    • Worked on application development for Sony CONNECT Music Store, using Sony's Digital Rights Managements.
    • Performed batch processing to convert music from various sources and formats.
    Technologies: Java, DRM
  • Project Manager/Architect

    2004 - 2005
    Axium Entertainment Payroll Services
    • Worked on a production accounting system, which has been live, with over a billion dollars of activity.
    • Managed a system consisting of more than 500k lines of Java code, dozens of stored procedures in MS SQL Servers and dozens of reports running on Crystal Enterprise.
    Technologies: Java, SQL Server, Citrix, Crystal Enterprise
  • Project Manager/Architect

    2003 - 2004
    • Worked on the warranty claim review system, certified user car program, and WebSphere portal, where users perform delegated user administration tasks.
    Technologies: WebSphere Application Server, Struts, JSP, J2EE
  • Director of Technical Education/Architect

    2001 - 2003
    Gamma Enterprise Technologies
    • Created and delivered J2EE-centric courses.
    • Architected and implemented Gamma's Java to SAP enterprise connectivity.
    • Presented at computer conferences on technology, and co-authored "WebLogic Server 8.1 Unleashed."
    Technologies: Java
  • Project Manager/Architect

    2000 - 2001
    • Created HomePage builder, an advanced applet to allow non-programmers to create web pages using WYSIWIG.
    Technologies: Java
  • Project Manager/Architect

    2000 - 2000
    Seren Systems
    • Created advanced ATM machines with scanning capabilities.
    Technologies: Java
  • Director of Strategic Development

    1999 - 2000
    • Worked on online auction front- and back-end code.
    Technologies: ColdFusion, SQL Server
  • Project Manager/Architect

    1996 - 1999
    Eagle Creek Systems
    • Created TexCAD, a CAD system used in creating fabrics for the textile industry.
    Technologies: MFC, C++, OpenGL
  • Senior Systems Analyst

    1994 - 1995
    Salomon Brothers
    • Worked on applications to support internal financial planning/budgeting.
    Technologies: Informix, MFC. C++
  • Systems Analyst

    1993 - 1994
    Merrill Lynch
    • Worked on applications to help brokers with their day-to-day operations.
    Technologies: MFC, C++, Visual Basic
  • Programmer Analyst

    1987 - 1992
    Gruntal, Inc.
    • Created reports for equity clearance services.
    Technologies: Stratus, PL/1


  • iRise Web Importer (Development)

    I developed an iRise Studio plugin that injects introspective JavaScript into any existing web page, to ascertain its contents, and then recreates them in iRise studio.

  • iRise CodeGen (Development)

    iRise CodeGen creates software code from iRise simulations, and can reduce customer efforts to create code by up to 70%.

  • Production Accounting System (Development)

    Accounting System for the Entertainment industry, consisting of over 500K lines of Java code.

  • Building Business Rules Engines with Drools - Power to the SMEople (Publication)
    A business rules engine is a tool for executing business rules. Business rules are composed of facts and conditional statements. Any “if-then” statement that appears in traditional business logic qualifies as a business rule.
  • Jeff is a mentor in the Toptal Global Mentor’s Program. This program is a partnership between Toptal and General Assembly to provide high quality mentorship for students from minority and low income backgrounds who are looking to begin their careers as professional software engineers. Jeff shows commitment to diversity in tech by mentoring a General Assembly student every week for a year, covering everything from coding tips and tricks to advice on making it in the industry.


  • Languages

    HTML, Java, JavaScript, ECMAScript (ES6), CSS, XML, C++, C, C#
  • Libraries/APIs

    jQuery, Node.js, NinjaScript, React, Google API, YUI, jQuery UI
  • Tools

    Ace Editor, Eclipse IDE, Docker Compose, Concourse CI, JBoss Drools, Apache JMeter, Maven, Microsoft Visual Studio, Jira
  • Paradigms

    REST, Agile Software Development, Object-oriented Programming (OOP), Asynchronous Programming, Distributed Programming, Service-oriented Architecture (SOA)
  • Platforms

    Ubuntu, Windows, Docker, Amazon Web Services (AWS), Heroku, Java EE, Android
  • Other

    Scraping, Project Management, Multithreading, Offshore Development, Software Engineering, WebLogic, Data Mining, Chrome Extensions, GlassFish
  • Frameworks

    Spring, Ext JS, Grinder, JUnit, Hibernate, Jersey, Bootstrap, TestNG
  • Storage

    JSON, MongoDB, Microsoft SQL Server, MySQL


  • Coursework in Artificial Intelligence/Natural Language Processing
    1990 - 1992
    New York University - New York City
  • Bachelor of Science degree in Computer Science
    1983 - 1987
    State University of New York - Stony Brook, NY
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