Full-Stack Developer • Dallas, TX

Hi, I'm Dayle — I build clean, fast software that solves real problems.

4+ years shipping production code across retail systems, APIs, and tooling. I love untangling legacy knots, automating the boring stuff, and turning ideas into working apps and features.

Java • Spring Boot React • Vite APIs (REST/SOAP) Docker • Jenkins Firebase • Stripe AI • Machine Learning
Portrait of Dayle Klinkhamer
Open to Work

About

I'm a software developer that has been passionate about technology since childhood-tinkering with game servers, troubleshooting issues for fun, and diving into anything that challenged me to think critically and of course became "Mr. Fix it" amongst family and friends in the process! That curiosity naturally led me into software engineering, where I thrive on solving problems, learning new skills, and building tools that make life better. On the side, I enjoy working on personal projects, including games like Clicker Kids, a web-based idle game.

When I step away from the keyboard I'm a bit of fitness nut! You'll find me training with my dog, working on calisthenics skills, running, in the gym or learning something new.

Skills

Languages

Java, Kotlin, JavaScript, Python, PHP, SQL, Bash

Frameworks & Tools

Spring Boot, JUnit/Mockito, Maven, Tomcat, React, Vite, Docker, Jenkins, Stripe, SteamWorks

Tech

REST & SOAP APIs, JSON, XML, Git, CI/CD, Fly.io, Firebase & FireStore, Vercel, Android Studio

Databases

DB2, MySQL

Experience

Lead Technical Director — iCode

May 2026 – Present • Dallas, TX
  • Lead the technical direction of the AI Studio platform.
  • Lead robotics and automation initiatives integrating hardware and software.
  • Research and implement emerging AI technologies and automation workflows.
  • Develop technical documentation and engineering processes.
  • Troubleshoot and optimize AI and robotics platforms.

Java Developer — RedPanda Software (Flooid)

Aug 2021 – Oct 2024 • South Africa
  • Led self-checkout redesign and rollout across major retail clients.
  • Integrated third-party payment systems (REST/SOAP).
  • Built internal tools that reduced repetitive QA by ~60%.
  • Maintained core services (Java/Spring), triaged & resolved defects, cut incident rates 40%.
  • Promoted rapidly from Junior to Intermediate demonstrating a strong ability to learn and grow.

Coding Mentor — HyperionDev

Jul 2020 – Jul 2021 • South Africa
  • Mentored and graded 180+ students in full-stack development.
  • Delivered lectures and talks on engineering principles & best practices.
  • Improved student completion rates via personalized plans.

Projects

LIVE

Colour changing Clock Wallpaper

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iframeweb demo

Classic Calculator

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iframeweb demo

Pomodoro Clock

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iframeweb demo

Etch-A-Sketch

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iframeweb demo

Clicker Kids

A browser-based idle/clicker built with React + Vite. Big-number math, save systems, juicy animations, and performance tuning for smooth play on desktop & mobile.

ReactViteGame DesignBreakInfinity
$ curl -X POST /payments
→ 200 OK
Latency: 83ms

Retail Payments Integrations

Integrated third-party processors via REST/SOAP for multiple retail chains. Designed resilient error-handling and observability to keep lanes moving.

JavaSpringREST/SOAPObservability

Self-Checkout Overhaul

Led refactor from legacy to modular design, improving throughput and reducing bug rates across stores. Coordinated rollout, testing, and feedback loops.

ArchitectureLeadershipCI/CD

Old school Etch-A-Sketch concept. Built with the intention of demonstrating strong knowledge of div tags within web development.

Etch-A-Sketch

Open raw
iframeweb demo

A classic calculator application. One of my earliest web applications.

Classic Calculator

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iframeweb demo

Pomodoro Clocks are designed to implement the pomodoro method, which improves performance and reduces burnout. This Application was built as part of the Odin Project.

Pomodoro Clock

Open raw
iframeweb demo

A simple, dynamic, colour changing wallpaper developed and used on Smart Home TV applications.

Clock Wallpaper

Open raw
iframeweb demo
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Simplistic Shopping list Android Application

Designed to be simple but useful. A hit amongst family and friends.

Android StudioKotlinSpeed

Android Camera Application

Camera application designed to capture superior audio quality without interupting device audio.

Android StudioKotlinQuality

Oh-My-Wordle

Built rapidly and designed to be a copycat application in order to allow repeated play of the classic Wordle game at the time of its release. Gained popularity among online forums and the like during this time.

Rapid DesignInitiativePygamePopular

Contact

I’m open to full-time roles and interesting projects. The fastest way to reach me is email.