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

Software Developer in Lake Mary, FL, United States

Member since August 21, 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


  • BioReference Laboratories
    Jersey, Apache Tomcat, MySQL, Ace Editor, GoJS, Ext JS, Jakarta EE, JBoss Drools
  • Driven By Safety
    MongoDB, Amazon Web Services (AWS), Angular, JavaScript, Python 2
  • RV For Fun
    React, GraphQL, PostgreSQL, Antd, Next.js, NestJS, TypeScript



Lake Mary, FL, United States



Preferred Environment

Git, Visual Studio, Eclipse

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 using Java. Rules include health insurance coverage.
    • Created a JSON web service to accept family tree information and output rules that, when 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 Ace.
    Technologies: Jersey, Apache Tomcat, MySQL, Ace Editor, GoJS, Ext JS, Jakarta EE, JBoss Drools
  • Senior Node.js Developer

    2020 - 2021
    Driven By Safety
    • Debugged existing Python scripts running in Google App Engine and wrote new Python scripts to automate data handling.
    • Debugged and extended existing Node.js/Angular applications using JavaScript.
    • Worked with AWS, Digital Ocean, SashiDo, and MongoDB.
    Technologies: MongoDB, Amazon Web Services (AWS), Angular, JavaScript, Python 2
  • Full-stack React Developer

    2020 - 2020
    RV For Fun
    • Performed front-end development including Next.js, TypeScript, custom React components, CSS, GraphQL calls, and Ant Design components.
    • Performed back-end development, including Nest.js, TypeScript, TypeORM, DB design, GraphQL components, and authorization.
    • Created Nest.js entities, models, resolvers, and services.
    Technologies: React, GraphQL, PostgreSQL, Antd, Next.js, NestJS, TypeScript
  • Architect

    2020 - 2020
    • Created Java/Spring Boot middleware with a REST interface.
    • Contributed to the development of React front-end code.
    • Serialized and deserialized code using Apache AVRO.
    • Communicated with the back end using Unix Sockets.
    Technologies: React, Java, Spring Boot
  • Back-end Developer

    2019 - 2019
    Virtual Real Estate
    • Supplied back-end API methods for front-end developers using Node.js.
    • Worked with MySQL and MLS data.
    • Worked with AWS S3 for image handling.
    • Researched data vendors and selected best fit.
    • Created AWS RDS for the project.
    Technologies: Data, RETS, Amazon S3 (AWS S3), Amazon EC2, MySQL, Node.js
  • Chief Architect for Platform Engineering

    2018 - 2018
    • Created direction and documentation for a serverless architecture that complied with 12-factor app mandates, microservices included.
    • Implemented and deployed Spring ConfigServer and other Spring Cloud Technologies.
    • Modified existing and created new pipelines in Concourse CI.
    • Used Docker and Docker Compose to create ELK stack for data analysts.
    Technologies: Java, Spring Boot, Concourse CI, Docker Compose, Docker, Microservices
  • Chief Architect

    2016 - 2017
    • Using Node.js, 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: Amazon Web Services (AWS), Analytics, Microservices, Data Warehousing, Data Warehouse Design, ECMAScript (ES6), MySQL, Node.js
  • 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.
    • Stored the results of the scraped information in MongoDB.
    Technologies: MongoDB, AWS Lambda, Node.js
  • Senior Architect

    2014 - 2015
    veEDIS Clinical Systems (via 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: Jersey, Ext JS, Jakarta EE, JBoss Drools
  • Consultant

    2014 - 2014
    Amazon Web Services
    • Created a Windows client to communicate with Amazon AppStream server applications. The 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: Amazon Web Services (AWS), Jetty, Visual Studio, Eclipse, Android NDK, Accessory Development Kit (ADK), Android, C++, Amazon AppStream, JNI, Java
  • 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: Agile, Jira, Maven, JxBrowser, JavaScript, MySQL, Apache Tomcat, JavaServer Pages (JSP), Java SE
  • Project Manager/Enterprise Architect

    2007 - 2008
    • Created Synapse, a rule-based web application to determine insurance reimbursement eligibility in real time. Synapse allowed medical, non-technical personnel to enter complicated medical eligibility rules through a simple-to-use web interface.
    • Provided project management, technical design, and application development services.
    Technologies: Ajax, JavaScript, Telerik, Microsoft SQL Server, VB.NET, C#.NET, BizTalk Server 2009
  • 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: Hibernate, Enterprise Java Beans (EJB), Java, IBM WebSphere
  • 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: .NET, Jakarta EE, Web Services
  • Senior Software Architect

    2005 - 2006
    • Worked on application development for Sony CONNECT Music Store, using Sony's digital rights management system.
    • Performed batch processing to convert music from various sources and formats.
    Technologies: Digital Rights Management (DRM), Java
  • 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 500 thousand lines of Java code, dozens of stored procedures in MS SQL servers, and dozens of reports running on Crystal Enterprise.
    Technologies: Crystal, Citrix, Microsoft SQL Server, Java
  • 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: Jakarta EE, JSP, Apache Struts, WebSphere Application Server
  • 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: Microsoft SQL Server, Adobe ColdFusion
  • Project Manager/Architect

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

    1994 - 1995
    Salomon Brothers
    • Worked on applications to support internal financial planning/budgeting.
    Technologies: C++, Microsoft Foundation Class Library (MFC), IBM Informix
  • Systems Analyst

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

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


  • iRise Web Importer

    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

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

  • Production Accounting System

    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.


  • Languages

    SQL, HTML, Java, JavaScript, ECMAScript (ES6), CSS, XML, C++, C, C#, Java SE, Crystal, Visual Basic, C#.NET, VB.NET, PL/1, Python 2, TypeScript, GraphQL
  • Libraries/APIs

    jQuery, Node.js, NinjaScript, React, Google API, YUI, jQuery UI, Microsoft Foundation Class Library (MFC), OpenGL, GoJS, Antd
  • Tools

    Ace Editor, Eclipse IDE, Docker Compose, Concourse CI, JBoss Drools, Apache JMeter, Maven, Microsoft Visual Studio, Jira, Apache Tomcat, Adobe ColdFusion, Amazon AppStream, Accessory Development Kit (ADK), Android NDK, Visual Studio, Jetty, Git
  • Paradigms

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

    Ubuntu, Windows, Docker, Amazon Web Services (AWS), Heroku, Java EE, IBM WebSphere, Jakarta EE, Citrix, Eclipse, Telerik, AWS Lambda, Amazon EC2, Android
  • Industry Expertise

    Project Management
  • Other

    Scraping, Multithreading, Offshore Development, Software Engineering, Outsourced Developer, Front-end Development, WebLogic, Data Mining, Chrome Extensions, GlassFish, JxBrowser, Web Services, Digital Rights Management (DRM), WebSphere Application Server, BizTalk Server 2009, Ajax, Data Warehousing, Analytics, RETS, Data, Data Warehouse Design, Enterprise Java Beans (EJB)
  • Frameworks

    Spring, Ext JS, Grinder, JUnit, Hibernate, Jersey, JavaServer Pages (JSP), .NET, Apache Struts, JSP, JNI, Spring Boot, Angular, NestJS, Next.js, Bootstrap, TestNG
  • Storage

    JSON, MongoDB, Microsoft SQL Server, MySQL, IBM Informix, Amazon S3 (AWS S3), PostgreSQL


  • 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


  • Professional Project Manager
    Project Management Institute
  • BEA WebLogic Server Developer and Administrator
  • Novell Certified Network Engineer

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