Justin Ortiz, Software Developer in Miami, FL, United States
Justin Ortiz

Software Developer in Miami, FL, United States

Member since July 29, 2018
Justin has added more than $100 million of value for his employer multiple times. He's worked on full-stack applications for the last several years and has helped found new engineering offices for his employer in Miami and New York City. Justin's preference right now is to focus on front-end JavaScript roles (especially React and Material Design, but also including Angular, Vue, and Ember) or full-stack (including Java and Ruby on Rails) roles.
Justin is now available for hire



  • Agile, 7 years
  • Java, 7 years
  • Object-oriented Programming (OOP), 7 years
  • JavaScript, 6 years
  • SQL, 5 years
  • Spring, 4 years
  • Ruby on Rails (RoR), 4 years
  • Ruby, 4 years


Miami, FL, United States



Preferred Environment

Mac, JetBrains, vi, Git

The most amazing...

...project I've worked on was doing hardcore security work for a major company.


  • Senior Software Engineer | Team Lead

    2015 - PRESENT
    Startup (eCommerce and Payments)
    • Trimmed 66% off the homepage load time just by applying browser-based analysis done before joining the company.
    • Helped build new front-end using the React ecosystem (including React Native, Redux, MaterialUI, and Apollo) and Angular 7 ecosystem (including Angular Material).
    • Prevented catastrophic bugs and outages by suggesting incremental alternatives and escalating the situation appropriately.
    • Maintained existing services and provided architecture guidance to new services being written mostly in Java and Ruby on Rails.
    • Implemented security features necessary to defend against attackers and maintain PCI compliance.
    Technologies: React, Angular, Material Design, Ruby on Rails, Java, Spring, JavaScript, Groovy
  • Analyst Developer

    2012 - 2015
    Goldman Sachs
    • Communicated with non-technical people (e.g., compliance officers and traders) and engineered software to do whatever they needed.
    • Improved web service latency by 90% via building an aggregation cache using the JVM and SQL.
    • Became the C# go-to person on my large global team and taught the team about the Agile methodology.
    • Used scripting languages like Ruby, Python, Bash, and DOS to automate tasks and perform file handling.
    • Built projects with a variety of technologies (including AngularJS, Java, and JavaScript) either working in a silo, with local developers or working remotely with people on the global team.
    Technologies: Java, JavaScript, AngularJS, SQL
  • Technical Consultant

    2010 - 2012
    Capital One & eBay
    • Reduced security vulnerabilities by implementing appropriate back-end coding solutions.
    • Substituted as a technical lead occasionally and applied the agile methodology to generate incremental value.
    • Tuned databases, algorithms, and caches to improve the latency of systems.
    • Integrated third-party software and APIs to improve the robustness of systems.
    • Helped construct domain models and enhance backwards-compatible services using Java, JavaScript, and SQL.
    Technologies: Java, JavaScript


  • Capital One 360 | Main eBanking Website (Development)

    If people couldn't log in to the core website used by millions of users, then it may have been my fault :) I implemented a variety of security stories and worked on integrations with 3rd party systems.

  • 30-minute App (Development)

    A quick example of a simple application that took me about 30 minutes to build and is deployed publicly on Heroku (compatible with mobile browsers as well). Essentially, it is a platform to remember activities that you've done and the date you've done them (similar to a to-do list). It includes the following features: search, authentication, and authorization. It was built using Ruby on Rails, PostgreSQL, and Bootstrap.


  • Paradigms

    Agile, Object-oriented Programming (OOP), REST
  • Languages

    Ruby, Java, JavaScript, Python, SQL, C#, TypeScript, Groovy
  • Frameworks

    Ruby on Rails (RoR), Spring, Ember.js, Hibernate, Redux, Sails.js, React Native, Cordova, Bootstrap, Angular, Django, Grails
  • Libraries/APIs

    jQuery, Node.js, React, Google Maps, Stripe API
  • Platforms

    Linux, AWS EC2, Heroku, JVM, iOS, Meteor, MapBox, Android
  • Storage

    PostgreSQL, MongoDB, MySQL, Sybase, Redis, IBM DB2, AWS S3, MariaDB
  • Other

    Material Design


  • Bachelor's degree in Computer Science, Math, and Psychology
    2005 - 2010
    University of Pennsylvania - Philadelphia, PA, USA

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