Lyndsey Scott, Developer in Los Angeles, CA, United States
Lyndsey is available for hire
Hire Lyndsey

Lyndsey Scott

Verified Expert  in Engineering

API Integration Developer

Los Angeles, CA, United States
Toptal Member Since
August 4, 2021

Lyndsey graduated from Amherst College as a computer science major and has been a freelance iOS developer for the past 6+ years. She’s ranked in the top 1% of question answerers on Stack Overflow; she wrote tutorials as part of the iOS team and made video tutorials for kids co-starring with the likes of Bill Gates and Mark Zuckerberg. Lyndsey has been featured by CNN, BBC, and Forbes for her computer programming skills and efforts to promote diversity in tech.


Medical Software Company
iOS, Swift, Xcode, API Integration
Tempus Ex Machina
iOS, Swift, GraphQL, Xcode, API Integration, Sockets
Opul Beauty
iOS, Swift, Stripe, Firebase, GraphQL, Apollo, Xcode, API Integration...




Preferred Environment

Xcode, Firebase, Fastlane, GraphQL, REST, iOS, Swift, Objective-C

The most amazing... project I've worked on this past year has allowed me to contribute to international vaccine production efforts.

Work Experience

iOS Developer

2021 - PRESENT
Medical Software Company
  • Contributed to an app used in the production of COVID-19 vaccines and other medications. The name is redacted for security reasons.
  • Developed several central components of the iOS app.
  • Maintained government and company-wide security protocols for public health and safety purposes.
Technologies: iOS, Swift, Xcode, API Integration

Lead iOS Developer

2021 - PRESENT
Tempus Ex Machina
  • Led a team of four iOS developers in building multiple apps using Tempus Ex's proprietary sports-related technology.
  • Gave feedback to the company about the API and suggested improvements.
  • Participated in live troubleshooting during sporting events.
Technologies: iOS, Swift, GraphQL, Xcode, API Integration, Sockets

Senior iOS Developer

2020 - 2021
Opul Beauty
  • Built Opul Beauty's iOS app. Opul Beauty connected high-end makeup artists, hairstylists, nail artists, and fashion stylists with customers in need of their services.
  • Collaborated extensively with the designer to create a beautiful app with both form and function, as the job was heavily design- and animation-focused.
  • Worked alongside a back-end developer to help design the GraphQL back end.
Technologies: iOS, Swift, Stripe, Firebase, GraphQL, Apollo, Xcode, API Integration, Animation, Design

Lead iOS Developer

2017 - 2019
  • Conducted the iOS facelift, updating the UI and functionality, converting the legacy app's Objective-C code into Swift, and coordinating tasks with the mobile lead. Rallybound provided nonprofits with digital fundraising solutions.
  • Developed the ability to configure multiple targets for multiple clients since the app was white-labeled. Then I coded Fastlane scripts in Ruby to automate screenshot capture, Git updates, Jira updates, and deployment for both iOS and Android.
  • Made many UX, UI, and feature decisions, collaborating with the back-end developers and working with an Android developer to help convert the iOS app to Android.
Technologies: iOS, Git, Swift, Objective-C, Fastlane, CocoaPods, Scripting, Ruby, Core Data, Xcode, White Labeling

iOS Developer

2017 - 2018
  • Added features, fixes, and updates to the original Grander iOS app. Grander connected aspiring gymnasts and fans to the greatest gymnasts in the world and minds in the sports industry.
  • Added safety measures into the app to better protect the primarily underage user base as they used the social media components of the app.
  • Implemented in-app purchase capabilities to facilitate the sale of bonus content.
Technologies: iOS, Swift, AVFoundation, Firebase, Xcode, Push Notifications, Apple Push Notifications, In-app Purchases

Interim CTO and Senior iOS Developer

2017 - 2017
  • Built the first version of the RYSE UP iOS app. RYSE UP paired emerging artists and the world’s top talent.
  • Served as the interim CTO, attended meetings with investors, and made technical decisions for the company.
  • Played a large part in the design process as the app was heavily design-focused.
Technologies: iOS, Swift, Core Video, Firebase, AVFoundation, Xcode, Core Data, Push Notifications, Apple Push Notifications, Animation

iOS Developer

2016 - 2017
  • Developed the iOS version of Markett's web application. Markett helped influencers earn money marketing their favorite brands through their social media channels.
  • Performed an extensive integration of the back end, using Firebase authentication and setting up payments with the Stripe API and data caching.
  • Converted Markett's web design to suit a mobile format and designed several complex animations.
Technologies: iOS, Swift, Stripe, Firebase, Google Login, Facebook Login, REST, Alamofire, YouTube API, Xcode, API Integration, Design, Animation, Core Data

iOS Developer

2016 - 2016
  • Acted as the sole iOS developer for Emogify, an app that allowed users to send animated emojis via either the Messages app or custom keyboard.
  • Used the Messages framework introduced in iOS 10 and separately created an app to support the custom keyboard; then handled in-app purchases for both.
  • Overcame the major challenge of this app — devising a folder structure capable of allowing a non-technical administrator the ability to update the emogifs (combination of emojis and GIFs) and still maintain their UI categorizations.
Technologies: Swift, MessagePack, Custom Keyboards, In-app Purchases, Xcode

Lead iOS Developer

2015 - 2016
  • Served as the lead developer for Tallscreen, a video collaboration app. I programmed approximately 99% of the front end and managed back-end development.
  • Made REST API calls and set up Firebase authentication.
  • Displayed customizable user profiles throughout various points in the app.
  • Implemented video streaming to display user videos and video sharing via social media channels.
  • Set up APNS certificates and handled push notifications.
  • Implemented dynamic video and image cropping and manipulation.
  • Created a user chat feature backed by Twilio Messaging.
  • Focused heavily on implementing the complex animations and detailed designs provided by the app designer.
Technologies: Swift, REST, Twilio, Firebase, APNs, Video Streaming, Video Editing, Social Media Apps, Xcode, API Integration, AVFoundation, Animation, Push Notifications, Apple Push Notifications

iOS Developer

2015 - 2015
  • Acted as the sole iOS developer for BeautifulBook, an app that allows users to view classic novels within various templates.
  • Implemented a customizable user interface that supported various fonts, colors, and layouts.
  • Backgrounded memory-intensive operations related to the iOS Core Text framework.
Technologies: iOS, Swift, Xcode, Core Data, Core Text, Memory Management, Design

Optical Character Recognition Tutorial
I wrote this tutorial published on to teach users how to read and manipulate text extracted from images using Tesseract's optical character recognition (OCR) technology. The tutorial attempts to make OCR fun and interesting through humor and story. It also includes a link to the downloadable final project.

Fastlane Tutorial
With personal input from the Fastlane team, I wrote this tutorial for that teaches users how to provision, screenshot, build, and upload an app to the App Store using Fastlane's automation tools.
2002 - 2006

Bachelor's Degree in Computer Science

Amherst College - Amherst, MA


Stripe, Facebook Login, Alamofire, YouTube API, CocoaPods, Sockets


Xcode, Fastlane, Git, Apple Push Notifications


Swift, GraphQL, Objective-C, Java, C++, MIPS, Ruby




iOS, Firebase, Twilio


Core Video, Core Data, Core Text


Programming, API Integration, Data Structures, Algorithms, Machine Learning, Artificial Intelligence (AI), Neural Networks, Compilers, Circuit Diagrams, Robotics, APNs, Video Streaming, Video Editing, Social Media Apps, MessagePack, Custom Keyboards, In-app Purchases, Google Login, AVFoundation, Scripting, Apollo, OCR, Tesseract, Memory Management, Design, Animation, Push Notifications, White Labeling

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.


Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring