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Zernach/README.md

👤 Ryan Zernach

🤖 AI Infrastructure & Mobile App Development

🇺🇸 Remote, Miami Beach, Florida, United States

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💻 TECH STACK



  • AI & Machine Learning Infrastructure
  • Back-End Engineering / WebSockets
  • AWS / Google Cloud / Firebase / Azure
  • GraphQL, SQL, NoSQL Databases
  • React Native Mobile Apps (iOS & Android)
  • TypeScript / React Web / HTML / CSS
  • XCode / Android Studio
  • Github Actions / CI CD / ETL Protocols
  • Custom CLI Generators & Bash Scripts
  • NodeJS / NextJS / JavaScript / ES6+
  • Dashboards & Data Visualizations
  • Unit Tests & Integration Tests
  • Webscraping Datasets
  • Fluent in Python


🚀 EXPERIENCE



Lead Mobile & Web Engineer • Freelance Contracts • Remote • November 2019 - Present

  • Designed, developed, and published four iOS/Android social networks
  • Created a fitness iOS/Android app for managing gym sessions and making payments
  • Refined an iPad React Native app to improve the map’s performance and fix bugs
  • Built websites for clients and taught them about long-term website maintenance

Lead Mobile & Web Engineer • Full-Time • Remote • June 2023 — August 2023

  • Made improvements to the codebase & documentation for a conversion from an old, unsupported mobile app language to React Native with Expo for both iOS/Android
  • Hired as their lead, in-house Mobile Engineer, but I resigned after 5 weeks because my employer would not allow me to live outside of the United States for more than a few weeks

Lead React Native Mobile App Developer • Full-Time • Remote • March 2022 - May 2023

  • Re-engineered the app’s architecture using CLI generators
  • Oversaw app’s design, development, testing, and publishing
  • Integrated group chat features, push notifications, & calendar sync
  • Overhauled the UI/UX, performance, and core functionality of the app
  • Generated reusable hooks, scripts, components, & screens
  • Led and mentored a junior React Native team
  • Decreased the app’s overall loading time by 90%
  • Improved efficiency by reducing number of API calls
  • Transitioned the codebase from Javascript to Typescript
  • Re-wrote npm/yarn packages using raw React Native to slim down dependencies
  • Published updates to the Apple and Google app stores
  • Modernized and maintained newest React Native & Expo versions
  • Evaluated Google Crashlytics to further improve stability & performance
  • Version 2.0 release date is June 2023

React Native Mobile App Developer & Back-End API's Developer • Full-Time Contract • Remote • February 2021 - March 2022

  • Managed front-end, custom back-end cloud functions, and authentication endpoints
  • Integrated various APIs, including: bank accounts, stocks, and cryptocurrencies
  • Wrote the data visualizations logic for viewing the performance of stocks & crypto
  • Built social network features: chat, user profile, posts, likes, emojis, and comments
  • Constructed core functionality: copy portfolio, trending investors, and popular stocks
  • Custom-built a companion admin web dashboard to monitor the mobile app’s performance

Data Science Tutor for University Students • Part-Time • Remote • October 2019 - February 2021

  • Taught over 900 college students JavaScript, HTML, CSS, Python, dashboards, databases, API’s, & machine learning
  • Managed a busy schedule of remotely teaching 30+ students per week for ~60 minutes per lesson

Teaching Assistant: Data Visualizations • Part-Time • Remote • October 2019 - February 2021

  • I was remotely contracted for six months to assist a group of (30) Vanderbilt University students through an intense, 6-month bootcamp-style curriculum of learning how to build websites, dashboards, data visualizations, databases, & machine learning models.


🎓 EDUCATION



Data Science Software Engineering

Lambda School • Remote • San Francisco, CA • August 2019 - July 2020

  • Productionizing Machine Learning Models, Python, HTML, Data Engineering, SQL, NoSQL, Back-End API’s, Data Visualizations, Natural-Language Processing (NLP) Models, Neural Networks, Statistical Analysis, Classic Algorithmic Paradigms, Computer Vision, Data Structures (ie: hash tables, graphs, BST’s, etc.)

Computer Science & Mathematics

Georgia Southern University • Statesboro, GA • August 2011 - December 2012

  • Calculus I, Calculus II, Calculus III, Statistics, Data Structures, Programming Principles I, Programming Principles II, Discrete Mathematics, Ethics of Computers in Society


🎖️ CERTIFICATIONS





💼 PERSONAL PROJECTS (View Portfolio Site)



STEM Tech Network — iOS/Android Social Learning Network for Future-Focused STEM-related Topics

  • Built my own idea in my free-time as a full-stack, solo, unicorn developer (everything front-end to back-end)
  • Integrated with AWS database & Hasura GraphQL endpoint for access to live websocket connection
  • Hosted custom API’s on Netlify and connected with Google Firebase to store images/videos and user auth
  • Implemented Over-the-Air (OTA) Updates to instantly deliver bug fixes and improvements to users
  • Utilized custom CLI templating to generate exceptionally organized Typescript components & screens

Marriage DAO — iOS/Android Blockchain React Native App Developed at the Miami Hack Week 2023 Hackathon

  • Built-in @WalletConnect for users to be able to login to the mobile app using one of dozens of web3 wallet providers
  • Leveraged API for users to create blockchain marriage contracts on the Ethereum/Polygon Blockchain network
  • As part of the hackathon, we had five days to complete this project, and we also created a React website

Landscape Supply App — iOS/Android App & Online Web Dashboard to Buy/Sell Landscape Supplies

  • For 3-months part-time, I wrote the iOS/Android app in React Native & built the web dashboard
  • Used Python/Flask & HTML/JS/CSS to build the web dashboard and back-end api's
  • Hosted the cloud infrastructure & authentication for this project on the Google Cloud Platform

Better Reads App — iOS App w/ Machine Learning for Readers to Track, Share, & Discover New Books

  • Used Agile & Scrum methodologies to iteratively deploy Natural Language Processing (NLP) models
  • Practiced CI/CD via blue/green RESTful Flask microservices on AWS EB to facilitate JSON post requests
  • Launched & managed a PostgreSQL instance on AWS RDS to store millions of GoogleBooks data

Flight Prices — Airline Pricing Analysis & Interactive Pricing User-Interface

  • Built front-end user interface with Flask for user to interact w/ a predictive machine learning model
  • Tediously gathered 27M rows of data, wrangled/cleaned to 9M, uploaded data to Kaggle
  • As a data analyst, I generated statistical analyses, distribution charts, and business intelligence insights

Brain Power — Using Machine Learning & an EEG Device to Control Technology

  • Built an application for the user to control light switches & thermostats with their brain
  • Collected data from an EEG device and used Scikit-Learn to train a predictive model
  • Deployed back-end Python get request API w/ Flask: communicate w/ EEG device, detect brain patterns

Spotify Music — Recommends New Music Based on Your Favorite Songs

  • Connected with Spotify’s API to harvest data (and metadata) about the songs in their database
  • Built back-end Python recommendation engine and API’s (get & post requests) to return predicted songs data to front-end

Pinned Loading

  1. react-native-responsive-sizes/react-native-responsive-sizes react-native-responsive-sizes/react-native-responsive-sizes Public

    Simple & lightweight react-native package to help you make your mobile app look terrific on every screen size.

    TypeScript 26

  2. Airline-Price-Predictions Airline-Price-Predictions Public

    Plotly Dash HTML Python Flask site for user to interact with a trained machine learning model to predict the round-trip cost of flights — based on 9 million 2018 Domestic Flight Prices in the Unite…

    Jupyter Notebook 8 1

  3. Flask_Boilerplate_GCloud_Website_Template Flask_Boilerplate_GCloud_Website_Template Public

    Use this template for rapidly launching a clean Python Flask website to Google Cloud's App Engine!

    HTML 2 1

  4. Ryans_Recommendations Ryans_Recommendations Public

    📱 Mobile App Development Installation Guide — 💻 Everything Needed for React Native Mobile App Development on a New MacBook