Leo Kalshteyn

Software Engineer

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About Me

I have experience in Ruby on Rails and various front-end programming languages, and I leverage my background in IT hardware systems. I have a broad knowledge of the latest web technologies and am skilled in implementing efficient principles and techniques in app development. Additionally, I possess strong communication skills and have the ability to quickly learn new concepts.

Contact Details

Leo Kalshteyn
New York City


Ready Set Marketing

Junior Full Stack Engineer May 2022 - Present

- Deliver high-performance code that is secure, well-documented, and of high quality.
- Ensure code is unit-tested and undergoes regular code review and continuous integration checks.
- Worked on back-end development using Webpack and Django.
- Built the application using Docker Desktop to manage containers and streamline deployment.

AGIL f(x)

Bubble.io Developer Jan 2022 - May 2022

- Utilize expertise in low/no code applications to develop web and mobile applications on the Bubble.io platform.
- Integrate business objectives with user experience for client projects.
- Write custom JavaScript and HTML/CSS to add features not possible with Bubble for specific projects.
- Implement Stripe integration for projects that require payment systems.

Counting Coral

Web Developer, Intern June 2021 - December 2021

- Migrated the Counting Coral website from Wix to WordPress using the Divi framework.
- Redesigned the Counting Coral website through collaboration with the founders, translating their vision into achievable code, and drafting new web pages.
- Designed and maintained a consistent user experience and interactions across multiple devices and platforms, including mobile and responsive web.
- Implemented JavaScript functions for key features on the pages of the main application.

East Coast, LLC

Technician April 2016 - May 2021

- Provided installation, configuration, and on-site support for wired and wireless surveillance equipment, including Network Video Recorders (NVRs), IP Cameras (IPCs), Wi-Fi Access Points (APs), and related network cabling.

Opus Energy, LLC

Technician September 2014 - February 2016

- Provided installation, service, and troubleshooting for HVAC equipment, including control modules, actuators, temperature/pressure sensors, measuring devices, circulating pumps, and various fans.
- Conducted control adjustments and operational checks to ensure the reliable operation of HVAC equipment.

St. Petersburg Collection Inc.

Web Developer, Technician May 2013 - September 2014

- Designed, developed, and managed the company's website, including creating product listings for the entire merchandise library.
- Designed and implemented a proprietary LED-based illumination system for the main Manhattan storefront.


Flatiron School

Full Stack Web Engineering February 2020

Hunter College

Computer Science March 2017


  • HTML & CSS
  • SASS
  • Ruby, Rails & Python
  • Vanilla Javascript
  • React & Redux
  • Node.js
  • MySQL & PostgreSQL
  • WordPress
  • Heroku, Git & Linux