Projects & Tools by Dustin

The Onyx Project

A personal lab for data tools, self-hosted systems, and web applications. Clinical data work by day, building by curiosity in the margins. Everything here started as a question I couldn't leave alone.

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About Onyx

A Workshop for
Thinking Out Loud

Onyx is where I build things I actually want to exist — data tools, self-hosted systems, and analytical work that comes from genuine curiosity. The day job involves rigorous data thinking; this is where that instinct gets to run.

Background

MBA + Grad Certificate in Business Analytics, UMKC
Pfizer — randomization schedule lifecycle across 100+ global clinical trials, GCP-regulated
Web development & analytics consulting

Tools I actually use

R (production ETL) · Python · SQL · Tableau
HTML · CSS · JS · Node.js · REST APIs
Ollama · Cloudflare · Tailscale · SQLite
Claude API · AI-assisted development workflows

Currently exploring

Claude API Integration Tableau LOD Expressions Python Data Pipelines Self-Hosted Infrastructure Bioinformatics & Clinical Data Workflow Automation |

Toolkit

Tableau · Python · SQL · R

HTML · CSS · JS · APIs

ETL · Data Modeling · Automation

Claude · AI-Assisted Dev

Dustin Carstens Analyst. Builder. Clinical data by day.

Featured Work

Things I've
Built

Each project started as something I wanted to understand, automate, or make visible.

Same Day Locksmith KC

Full-stack business website with WorkIZ API integration, custom booking system, and Google Maps. Mobile-first design for emergency locksmith requests.

200+Reviews

4.8Rating

24/7Booking

HTML/CSS/JS Cloudflare WorkIZ API Google Maps

View Live Site

Onyx AI — Private Chat Assistant

Self-hosted AI chat running local LLMs with secure remote access. Multi-server GPU inference via Tailscale, document analysis, and two-layer authentication with Cloudflare tunnel infrastructure.

5Security Layers

2Servers

PWAInstallable

Ollama Node.js Cloudflare Tailscale

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The Onyx Project — This Portfolio

The site you're on. Built from scratch with no frameworks — every interaction hand-coded, including the 3D gem, particle system, and carousel. A useful constraint for understanding how things actually work.

4Sections

0Frameworks

100%Custom

HTML/CSS/JS Three.js REST APIs AI-Assisted

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Marketing Analytics Dashboard

Embedded Tableau visualizations that transform raw supermarket data into explorable stories. Filter, drill down, and interact with insights directly.

5+Charts

LiveFiltering

RealData

Tableau Data Viz Analytics JS API

View Dashboard

Live Lab

Interactive
Tools

Try these tools directly in your browser — just click and use.

Weather Dashboard

Real-time weather data for any location using live API integration.

Data Calculator

Paste numbers (comma or space-separated) to get instant statistics.

Stock Lookup

Get real-time stock quotes and market data for any ticker symbol.

Text Analytics

Analyze text for word count, character count, and reading time.

.XLSX

Budgeting Template

Comprehensive budget tracking with built-in formulas, category breakdowns, and monthly summaries.

Multi-tab Auto-calc

Download Template