Jef Davis

Jef Davis

Odessa, TX

My background is in the design and field maintenance of industrial control systems. I work with the UN on technical projects focused on blockchain, data analytics, and Internet of Things projects within a humanitarian context.

Skills & Experience

  • Company

    Keane Group

  • Job Title

    Electronics Technician

  • Spoken Languages

    • English
    • Russian
    • French
    • Spanish

343 Achievements

  • Working with jQuery Collections (2017)
  • Understanding jQuery Events and DOM Traversal (2017)
  • Introducing jQuery (2017)
  • Branches on Git Hosting Services
  • Remote Branches
  • Merging
  • Generics in Java
  • Express Middleware
  • Branches
  • Interfaces in Java
  • Sessions and Cookies
  • GitHub and Other Remote Repositories
  • Managing Committed Files
  • First Commits
  • User Registration and Login
  • Callbacks and the DOM
  • Callbacks with Timers
  • Introduction to Callback Functions
  • What is Authentication?
  • Completing and Testing the API
  • Communicating with Mongo Through Mongoose
  • Modeling Data for the API
  • Building API Routes in Express
  • Practicing Getters and Setters
  • Getters and Setters
  • Practicing Classes
  • Working with Classes in JavaScript
  • Practicing Object Basics
  • Object Basics
  • Introduction to Object-Oriented JavaScript
  • Improving Quality Assurance Practices
  • Bug Reporting
  • Executing Tests
  • Writing Manual Test Cases
  • Why We Test
  • Building a REST Service
  • Serving Static Files in Express
  • Applying Express Knowledge
  • Middleware
  • Deeper into Routing with Express
  • Using Templates with Express
  • Getting Started with Express
  • Merge Sort and Linked Lists
  • The Merge Sort Algorithm
  • Building a Linked List
  • Exploring Arrays
  • Introducing IntelliJ and Unpacking Packages
  • Meet Selenium
  • Writing a Classifier
  • Next Steps
  • Financing Our Company
  • Selling Your Product
  • Marketing Your Product
  • Creating a Command Line Weather Application
  • Handling Errors in Node
  • Getting Data From an API With Node
  • Testing and Publishing an Alexa Skill
  • Introduction to Node.js
  • Classes
  • Objects and New Collection Types
  • The Cooler Parts of ES2015
  • ES2015 Basics
  • Building an Alexa Skill
  • Alexa Skills Kit Overview
  • Getting the REST You Need 2
  • JavaScript Tools and Workflows
  • JavaScript is Everywhere
  • Improving the Application Code
  • Editing and Filtering Names
  • Forms
  • Tables
  • Objects
  • Links
  • Lists
  • Text
  • Introduction
  • Adding and Removing Names
  • Recursion and Space Complexity
  • Algorithms in Code
  • Time Complexity
  • Gotchas and Wins
  • Iteration
  • Creation
  • Product Market Fit
  • File Uploads and Entity Updates in Spring + Hibernate
  • User Messages in Spring
  • Playing a Counting Game
  • Discovery
  • Better SEO Through Tools
  • Better SEO Through Code
  • Machine Learning Vocabulary
  • Introduction to Machine Learning
  • Creating a Long Term Business
  • Protecting Yourself With Contracts
  • Establishing a Proper Workflow
  • Pricing and Project Proposals
  • Finding Your First Project
  • Better SEO Through Content
  • Starting a Freelance Career
  • Introduction to SEO
  • JavaScript Frameworks, Libraries, and Developer Roles
  • JavaScript Outside of the Browser
  • The Design Solution
  • The Design Problem
  • Design Principles
  • Moving Forward with UX
  • Tools UXers Use
  • How UXers Think
  • What Do User Experience Designers Do?
  • Improving Usability
  • Mobile Usability
  • Website Usability
  • Telling the Story
  • Designing for your User’s "To-be"
  • Understanding your User’s “As-is” Scenario
  • Becoming Acquainted with Your User
  • Becoming a Design Thinker
  • What is User Experience (UX)?
  • What is Usability?
  • What is Product Design?
  • Go Further With Mongo
  • Working With Collections
  • Understanding MongoDB
  • Go Concurrency Overview
  • Go Custom Types Overview
  • Go Data Structures Overview
  • Getting Started with MongoDB
  • Getting Started with CRUD in Spring + Hibernate
  • Traversing the DOM
  • Data-Driven Application Design
  • Integrating Hibernate with Spring
  • Go Flow Control Overview
  • Go Syntax Overview
  • Responding to User Interaction
  • Using the MVC Architecture with Spring
  • Modeling, Storing, and Presenting Data with Spring
  • Creating Spring Controllers and Thymeleaf Views
  • The Data Analysis Process
  • Getting to Know Your Data
  • Introducing Data Analysis
  • Spring Components and Configuring Our App
  • Setting Up Your Local Environment for Spring Development
  • Bells and Whistles
  • Diving into Web Development
  • Making Changes to the DOM
  • Getting a Handle on the DOM
  • The Browser Environment
  • What to Test
  • How To Test
  • Creating and Modifying Database Tables
  • Create Function Using Arrow Syntax
  • Using Template Literals
  • Defining Variables With let and const
  • Error Checking
  • Conditional Formatting
  • Pivot Tables
  • LOOKUP Functions
  • Why Test
  • Dockerize a Web App
  • Managing Images and Containers
  • Finishing the Game
  • Introducing JavaScript
  • Building Images Using Dockerfiles
  • Fundamentals of Docker
  • Docker Use Cases
  • Maintaining Secure Web Apps
  • Protecting Data and Keeping Attackers Out
  • Why Protect Your Web Apps
  • Hooking up the Model to the View
  • Building the Weather UI
  • Testing and Debugging
  • Improving Our Code
  • Basic Android Programming
  • Creating the Screen Layout
  • Getting Started with Android
  • Get Involved in Open Source
  •  Create a Web Presence on GitHub
  •  Working on a Team
  • Working By Yourself
  • Hello, GitHub!
  • Building Forms With Bootstrap
  • Using Bootstrap Components
  • Responsive Layouts With the Bootstrap Grid
  • Getting to Know Bootstrap 4
  • Practicing Data Visualization in Excel
  • Chart Formatting and Layout
  • Big Data at Netflix
  • Where and How Big Data Is Used
  • What is Big Data
  • When To Use What Type of Chart
  • Day 3: Getting Creative
  • Day 2: Advanced Selecting
  • Day 1: Joining Tables
  • Orientation: Selecting Data
  • Event Planning
  • Build a Pomodoro App
  • Design a Better App
  • Introduction To Data Visualization
  • Persisting Data with Hibernate
  • Getting Started with Hibernate
  • Data Persistence & ORMs
  • Build a Spreadsheet
  • Spreadsheet Best Practices
  • Writing Your Own Java Annotation
  • Graphical User Interfaces
  • Spreadsheet Functions & Formulas
  • Getting Started With Spreadsheets
  • Introducing Spreadsheets
  • Using Java's Built-In Annotations
  • S3 Storage Service
  • AWS and "The Cloud"
  • Delivering the MVP
  • Creating the MVP
  • Workflows
  • Working With Remote Repositories
  • Merging
  • Branches
  • Getting Started With Git
  • Why Version Control Matters
  • Security in Practice
  • Common Attacks and Defenses
  • Hello Internet!
  • Updating and Uninstalling Packages with npm
  • Installing Packages with npm
  • What is npm?
  • Advanced Tooling
  • Harnessing the Power of Objects
  • Security: Solutions
  • Security: Concerns
  • Subqueries
  • What is the MailChimp API
  • Meet Objects
  • Set Operations
  • Protecting and Sharing Your Work
  • Licensing
  • Fair Use and Public Domain
  • Getting Started with Copyright
  • Joining Table Data with SQL
  • Table Relationships
  • Database Keys
  • Database Normalization
  • Date and Time Functions
  • Aggregate and Numeric Functions
  • Working with Text
  • Ordering, Limiting and Paging Results
  • IDE Exploration
  • Getting the REST You Need
  • GET and POST Requests in a Browser
  • Introduction to HTTP
  • What Is WordPress?
  • Adding a New Web Page
  • Make It Beautiful with CSS
  • HTML: The Structural Foundation of Web Pages and Applications
  • Getting Familiar with HTML and CSS
  • How it Works
  • Scrum Artifacts
  • Scrum Events
  • Introducing Scrum
  • What is Agile?
  • Handling Errors When Manipulating Data
  • Deleting Data from a Database
  • Updating Data in a Database
  • Adding Data to a Database
  • Finding the Data You Want
  • Getting Data from a Database
  • Data, Databases and SQL
  • Perfect
  • Perform
  • Console I/O
  • Prepare and Plan
  • Efficiency!
  • Working with JSON
  • Concurrency and Error Handling
  • Networking
  • Exploring an API
  • SQL Calculating, Aggregating and Other Functions
  • JavaScript Objects
  • Joining Relational Data Between Tables in SQL
  • Manipulating Schema with SQL
  • JavaScript Arrays
  • Pick a Number! Any Number!
  • Putting the "Fun" Back in "Functions"
  • Shopping List
  • Things That Count
  • Ins & Outs
  • Say Hello to Python
  • JavaScript Loops
  • Creating Tables and Manipulating Data with SQL
  • Reading Data from Databases with SQL
  • Installing MySQL Server and MySQL Workbench
  • Introduction to Data, Databases and SQL
  • The Internet
  • JavaScript Functions
  • JavaScript Conditional Statements
  • JavaScript Numbers
  • JavaScript Variables
  • Introducing JavaScript
  • Exploring the Java Collections Framework
  • Organizing Data
  • Getting There
  • Publishing on Google Play
  • Finishing the User Interface
  • The Model-View-Controller Pattern
  • Intents and Multiple Activities
  • WWW
  • User Input
  • Using Git for Android
  • Getting Started with Genymotion
  • Getting Started with Android Studio
  • Testing and Debugging
  • Installing Programs
  • Environment and Redirection
  • Improving Our Code
  • Functions
  • Objects and Arrays
  • Control Structures
  • Basics
  • MASH JavaScript
  • MASH CSS
  • MASH HTML
  • Coding the Fun Facts
  • Treehouse Club - JavaScript
  • Welcome to the Treehouse Club
  • Treehouse Club - CSS
  • Basic Android Programming
  • DNS Basics
  • Graphic Basics
  • Console Processes
  • Creating the Initial Screen Layout
  • Console Users and Permission
  • Getting Started with Android
  • Delivering the MVP
  • Computer Languages
  • Computer Basics
  • Moving Around in the Console
  • Creating the MVP
  • Harnessing the Power of Objects
  • Website Basics
  • Meet Objects
  • Perfecting the Prototype
  • Using your New Tools
  • Getting Started with Java
  • Newbie