Full Stack Developer at CARDFREE

1 month ago Development & Programming Middle Full-Time

We are seeking a full-stack developer with experience in Ruby on Rails as well as a front-end JavaScript framework (Vue.js preferred) to join our development team.


  • Bachelors in Computer Science or a related field, or Code Bootcamp

Minimum 3 years of job experience with:

  • Ruby on Rails
  • A front-end JavaScript framework (any is acceptable, but Vue.js preferred)
  • REST APIs using JSON
  • Databases, including table layout and design, and SQL Queries
  • Authentication/authorization
  • Excellent analytical, communication, organizational and problem-solving skills coupled with a strong work ethic
  • Strong commitment to TDD (Test Driven Development) practices using RSpec, Minitest, and/or Jest
  • Fluency in OO design and development
  • Ability to work a hybrid work schedule, and sometimes on-site in downtown Denver

Preferred Skills

  • Experience with creating user stories from requirements, estimating effort, and planning coming workload
  • Experience with designing and building intuitive user interfaces

Experience with:

  • Multi-tenant software
  • Agile teams/development
  • AWS technologies
  • WebSocket technologies such as ActionCable or Socket.IO
  • Redis & Sidekiq background jobs
  • Docker


At CardFress, we ensure Merchant Mobile Apps delight users and keep them engaged. From innovative solutions for Offers and Loyalty to Order Ahead and Menu Management, we build products that power user engagement and measure key metrics so merchants can sharpen their mobile business. We have won the best Mobile Startup Award with the MEA, listed as part of the Red Herring Top 100 North America Award, and among others, are powering the Dunkin Donuts mobile app.

We are seeking a full-stack developer with experience in Ruby on Rails as well as a front-end JavaScript framework (Vue.js preferred) to join our development team. This position is an integral part of a team that works on the platform’s customer engagement portal, which allows merchants to reach their customers and manage their mobile apps. We are looking for someone who is passionate about building an intuitive and cutting-edge, self-service experience for our customers.

As a part of the Engineering team, you will be building a scalable solution that millions of users will be using as their primary mobile interface to submit and pay for their orders. We nurture creativity and encourage individuality to generate a great work environment with personality. In turn, we are seeking talent that doesn’t always want to do it the corporate way but strives to create innovative solutions that amaze and have some fun while doing it.

Job Type: Full-time

Pay: $83,688.00 - $159,488.00 per year


  • 401(k)
  • Dental insurance
  • Flexible schedule
  • Flexible spending account
  • Health insurance
  • Health savings account
  • Life insurance
  • Paid time off
  • Vision insurance


8 hour shift

Monday to Friday


  • Ruby on Rails: 3 years (Required)
  • JavaScript: 2 years (Required)
  • Databases: 2 years (Required)
  • JSON: 1 year (Required)
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