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Welcome!

Welcome to my webpage. I have created it to demonstrate my ability to create responsive and section 508 compliant webpages. I know the design is quite simple, but it demonstrates all of the core concepts necessary to implement compliant pages. Design is definitely not my strength.

About David K Johnson

I began working as a software developer in the early 1980s and have grown and changed along with the technology. I began writing custom business applications and quickly branched out into data management and manipulation. With the rise of networking and the internet, I began working with distributed applications and most recently have been involved with building RESTful APIs that intefaced with blockchain technology.

I have a Bachelors of Science in Mathematics with a minor in Computer Science and a Masters of Science in Mathematics, both from the University of Houston. I have extensive coursework in both statistics and numerical methods. Dealing with the inconsistencies caused by using different numerical types to represent the same number in different contexts has been one focus of that skillset.

In addition to my work as a software developer, I taught high school math and science at Rainard School for Gifted Students. I used primarily a project-based learning format for my classes, teaching concepts my actually doing real-world tasks that required the skills and knowledge targeted.

My hobbies include reading, role-playing games of all types, model rocketry and amateur radio.

David K Johnson

Plano, TX | (713) 775-0410

david.karlerik.johnson@gmail.com

Objective

Accomplished developer looking for a position where my experience in software design and implementation can provide innovative customer-driven solutions. I want to help a company achieve its organizational goals by applying my skills in effective data analysis and utilization.

Professional Skills and Accomplishments

Software development

Authoring business and scientific computing packages
Programming in x86 assembly, C++, C#, Rust, JavaScript and Golang
Using frameworks such as .NET Core, NodeJS and PyTorch
Producing flexible, customer-driven, scalable solutions

Database Integration

Integrating SQL and other relational databases with end-user applications to streamline workflows
Creating web-based applications to access SQL databases through RESTful APIs
Writing code for the detection and rejection of inauthentic traffic

Data Analytics

Analyzing data to detect patterns and anomalies
Working with raw data and ensuring that it is accurately represented in various formats
Developing procedures and code to validate input

Communication

Presenting information in written, verbal and visual form customized to a targeted audience
Accurately documenting bugs and issues within issue tracking systems such as Jira
Effective writing of project, code and end-user documentation
Listening to others when they communicate, asking questions to better understand

Major Projects

Medical records retrieval system – scanning, storing and indexing medical records and images into a SQL-backed application reducing access times from hours to 3–4 minutes
Real estate title settlement system – tracking title applications through the process of closing, presenting each user with the necessary information to facilitate efficient processing
Check processing service – handling bad check and other consumer debt information, sending notices, tracking payments, and producing auditable records for further actions
Construction bid estimator – Monte Carlo simulation for forecasting construction costs, improving bid accuracy and allowing for detailed what-if analysis
Seismic data collection and analysis system – collecting, storing and analyzing real-time seismic sensor readings for predicting adverse events
Volunteer Fire dispatching system – producing maps for first responders detailing hazards and on-site resources and improving outcomes -- credited with saving 15 lives and $10 million in property damage in the first five years.

Work History

   Auctoritas, March 2021 – September 2023
      Software Development Engineer
   Rainard School for Gifted Students, March 2008 – June 2018
      High School Math and Science Teacher
   Computer and Technology Solutions, April 1990 – August 2003
      Programmer Analyst

Education

   MS in Mathematics, University of Houston, May 2007,
      included coursework in Analysis, Topology, Statistics, and Numerical Methods
   BS in Mathematics, University of Houston, May 2005,
      Minor in Computer Science

Languages

Fluent in English, spoken and written
Proficient in Korean, spoken and written

Skills

   Languages: x86 assembly, C++, C#, JavaScript, TypeScript, Rust, Scala, Golang
   Frameworks: NodeJS, jQuery, PyTorch, .NET Core
   Tools: Windows, MacOS, Linux, Unix, Git
   Databases: SQL (PostgreSQL, MySQL, CockroachDB), NoSQL

Download Resume as docx or pdf

Projects

This section of webpage is still under construction as I am in the the process of moving some personal projects to my new server.