Cassidy Laidlaw, Developer in Hyattsville, MD, United States
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Cassidy Laidlaw

Verified Expert  in Engineering

Generative Pre-trained Transformers (GPT) Developer

Hyattsville, MD, United States
Toptal Member Since
January 24, 2019

Cassidy has been coding since elementary school and is an expert in building websites and mobile apps. For over a decade now, Cassidy has been creating full-stack applications from scratch and now helps startups, businesses, entrepreneurs, and government agencies to develop and launch their own apps on the web and for mobile platforms such as iOS and Android.

LinkedIn API, BrainTree, Amazon Web Services (AWS), jQuery, Bootstrap, Django...
Why Weight?
Amazon Web Services (AWS), Django, React Native, React, Python, JavaScript
Max Planck Institute for Intelligent Systems
Matplotlib, SciPy, Blender, TensorFlow, Python




Preferred Environment

Atom, MacOS, GitHub, Trello, Slack

The most amazing...

...thing I have developed was a wireless ad-hoc IoT network for gathering temperature data at a fraction of the cost of market products.

Work Experience

Web Developer

2016 - PRESENT
  • Built a web-based mentoring platform for entrepreneurs using Django, Bootstrap, and jQuery.
  • Created a feature to automatically pull in users' profiles from LinkedIn.
  • Implemented subscription payments with Braintree.
  • Hosted the platform on AWS Elastic Beanstalk.
Technologies: LinkedIn API, BrainTree, Amazon Web Services (AWS), jQuery, Bootstrap, Django, Python

App Developer

2018 - 2018
Why Weight?
  • Built an app to help clients of Why Weight, a weight loss and life coaching company.
  • Implemented features to let users track their weight, log food, and water intake and message the company’s life coaches.
  • Integrated with a Bluetooth LE smart scale to automatically collect users' body composition data.
  • Created a coaching dashboard for life coaches to view their clients' weight loss progress and message with them.
Technologies: Amazon Web Services (AWS), Django, React Native, React, Python, JavaScript

Research Intern

2017 - 2018
Max Planck Institute for Intelligent Systems
  • Improved statistical face models developed at the institute.
  • Designed a protocol to capture tens of thousands of 3D scans of human faces.
  • Used deep learning to model the relationship between speech and facial motion.
Technologies: Matplotlib, SciPy, Blender, TensorFlow, Python

Software Developer

2016 - 2018
Center for Study of Terrorism and Responses to Terrorism
  • Built a tool to analyze insider threats in airport cargo systems with a team of three other developers.
  • Implemented the user interface in JavaFX.
  • Met with and presented a tool to government officials in the Department of Homeland Security, the FBI, and more.
Technologies: R, Gradle, JavaFX, Java


2015 - 2016
Booz Allen Hamilton
  • Served as technical lead on a team that analyzed Twitter data for deceitful behavior with >95% accuracy.
  • Designed methods to analyze Twitter data using data mining, statistics, natural language processing, and machine learning.
  • Created analytics tools to predict viral content on Twitter.
Technologies: Angular, Bootstrap, Twitter API, Scikit-learn, R, Python

App Developer

2015 - 2016
  • Developed a mobile app to assist in indoor navigation for iOS and Android.
Technologies: Google Maps, Swift

Why Weight?
The Why Weight app lets you take control of your life by keeping track of your weight, eating, and water intake.

My Resume, Rendered by React
This tool lets me automatically render customized resumes for different jobs.


Python 3, JavaScript 6, Python 2, Python, JavaScript, Java, C, Racket, R, PHP, Swift, SQL, Excel VBA


Django, Django REST Framework, React Native, Bootstrap, Angular, Flask


Scikit-learn, Google AdWords, React, jQuery, TensorFlow, Keras, SpaCy, Google Maps, Twitter API, Google Maps API, LinkedIn API, SciPy, Matplotlib


Agile Software Development, Functional Programming


Deep Learning, Classification Algorithms, Natural Language Processing (NLP), GPT, Generative Pre-trained Transformers (GPT), Topic Modeling, Data Cleaning, BrainTree


Adobe Photoshop, Adobe Premiere Pro, Slack, Trello, GitHub, Atom, Gradle, Blender, Adobe Illustrator, Adobe After Effects


WordPress, AWS Elastic Beanstalk, Amazon EC2, iOS, Linux, MacOS, Amazon Web Services (AWS), Android, Parse Server, JavaFX



2014 - 2018

Double Bachelor's Degree in Mathematics and Computer Science

University of Maryland, College Park - College Park, MD, USA