David R. Hemmat

Hello, I'm David

Full Stack Developer.

David R. Hemmat

Full stack developer


Ruby on Rails
Java / C# / Android

Social Profiles

Professional Profile

I'm a full stack web developer working mainly with Ruby on Rails. I started playing with code when I was 13 and have come a long way. In the past few years I have done work for a number of clients including Condé Nast, Six Red Marbles, ShopKeep and Couplewise.

I enjoy challenges and regularly look into learning new technologies. My go-to platform for development is Rails as I have become very experienced in it and I am able to deliver high quality code and functionality very rapidly. I am currently working on improving my Angular.js skills, and I am actively working on a number of personal and professional development projects.


What I can do for you.

Code from scratch

I can build any type of web application you need from scratch. We will start with having a conversation about what you need to build and take it from there.

Build your MVP

Starting a new venture? I will help you get your boots on the ground. Let me build your MVP from scratch providing you with a high quality product to start testing your market.

Upgrade and maintain

Got an old app that needs a facelift? Broken features? Need new functionality? Need to upgrade your platform or just make sure everything is in order? I will be happy to take care of this for you.


My education and experience.


Entrepreneurship: Launching an Innovative Business Specialization

Four course specialization. Acumulated grade: 98.8%.

University of Maryland

2014 - 2015

Telecommunications Engineering

Valedictorian and first in class of 971 students (from all majors). 4.0 GPA, graduated Summa Cum Laude.

Pontificia Universidad Católica Madre y Maestra

2008 - 2013


Full Stack Developer


Lead back-end developer building the Couplewise platform. Work building new features and maintaining existing functionality.

  • Main technologies: Ruby On Rails, MongoDB, MongoMapper, RSpec, Bootstrap.
  • Website: www.couplewise.com
  • Dates: 08 / 2015 - Present

Migrated AJS Design's web app from Ruby on Rails version 2.3.5 to version 3.2.11. Implemented various security improvements.

Infinite Cloud / ShopKeep

Worked as a full stack developer on a team of 4 to build a new multi-tenant ecommerce platform for ShopKeep, a REST API for the e-commerce platform, a new store front for their own online shop, and a supporting gem and administration console.

  • Main technologies: Ruby on Rails v.4, Grape (for REST API), Her gem, Amazon Web Services.
  • Website: shop.shopkeep.com
  • Dates: 01 / 2014 - 01 / 2015
Sonwalkar Consulting / Six Red Marbles

Worked with a team of 5 to to create an online game for teaching STEM (Science, Technology, Engineering and Math) for Six Red Marbles. Implemented various parts of the game's front end using Backbone.js and jQuery. Implemented Redis in the back end using a Rails app for data storage.

  • Main technologies: Backbone.js, Ruby on Rails v3.2, Redis, jQuery.
  • Website: www.sixredmarbles.com
  • Dates: 08 / 2013 - 12 / 2013

Blue Coding LLC and Freelance

08 / 2013 - Present

Full stack developer

Full stack developer working to migrate large ERP system based on Cybase PowerBuilder to JavaEE and JSF. Created multiple features and functionalities for the accounting module of the ERP software.

  • Main technologies: JavaEE, JSF, Primefaces, Hibernate, OracleDB, Glassfish server.

Newsoft SRL

05 / 2013 - 01 / 2014

Web developer

Condé Nast

Built a web scraper from scratch that would crawl Condé Nast owned blogs and collect article text along with their images and dump them in a predefined folder structure.

  • Main technologies: Ruby, Nokogiri.

Built MVP for hospital management software on Ruby on Rails, with a team of 2. Worked as full stack developer building both front and back end functionality. Built graphs using D3.js.

  • Main technologies: Ruby on Rails, D3.js.

Intellisys Corp.

01 / 2013 - 05 / 2013


Some people I have done work for.

Let's talk

I'm currently available for freelance work. Just shoot me an email or give me a call so we can talk about your project.

Contact me