Equational Applications LLC

Equational Applications

Kurt VanDusen

Full-stack developer building AI-powered mobile & web apps in public. React Native · Firebase · Google Cloud · Vertex AI.

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Featured Project

Clanker

Open Source · Built in Public · v29+

AI chatbot platform where users create custom characters and chat using Google Cloud Vertex AI. Firebase + Cloud SQL backend with subscription-based access control, persistent memory, and full cross-platform support on iOS, Android, and web.

  • Custom AI character creation with personality & persistent memory
  • Image generation and avatar gallery
  • LLM Wiki Memory — structured, queryable facts & episodic events
  • Cloud character save & sharing (subscription-gated)
  • Stripe subscriptions with cross-platform access control
  • Spec-driven development with AI agents

Tech Stack

React Native
Expo SDK 54
TypeScript
Vertex AI
Anthropic Claude
Firebase
Cloud SQL
PostgreSQL
Stripe
xState
TanStack Query
Expo EAS
Expertise

Skills

AI & Cloud

Vertex AI
Anthropic Claude
Google Cloud
Firebase
Cloud SQL
Cloud Run
LangChain
LangFlow
ChromaDB

Frontend

React Native
Expo
React
TypeScript
Tailwind CSS
Expo Router
React Native Paper

Backend

Node.js
PostgreSQL
Apollo GraphQL
REST API
Firebase Functions
Stripe
Supabase

DevOps & Tools

GitHub Actions
Expo EAS
Docker
Kubernetes
Git
Semantic Release
xState
TanStack Query
Background

Experience

  1. Full Stack & Mobile Engineer

    Spectrum Net Designs, Inc

    Oct 2023 – Mar 2026

    Full-stack and mobile development for Auctioneer Software. Built and maintained React, React Native (Expo), and Node.js applications deployed on bare-metal Kubernetes. Managed Play Store and App Store releases, handled CI/CD pipelines, and contributed across the entire stack from database to mobile client.

  2. Founder & Software Developer

    Current

    Equational Applications LLC

    Mar 2020 – Present

    Building AI-powered mobile and web apps with React Native, Expo, Firebase, Google Cloud, and Vertex AI. Independent contracting and consulting.

  3. Music Producer

    Current

    Equational Sound

    2001 – Present

    Indie music recording and publishing.

  4. Web Developer

    Alley Cat Bead Company

    2001 – 2015

    Drupal e-commerce website developer for online retail store.

  5. Owner

    Webstore Specialist

    2005 – 2010

    Website development for e-commerce and SEO services.

Credentials

Certifications

🏗️

Google Cloud Certified

Associate Cloud Engineer

August 02, 2023

View Report ↗

General Coding Assessment

CodeSignal

Dec 2022