Production Systems, Built End-to-End.
These are not concepts or mockups. Every project below is live, serving real users, and built around workflows that had to work in production, not just look good in a screenshot.
This page shows how I think as an engineer: clarify the workflow, design the data model, ship the product, instrument the funnel, harden the system, and keep improving it from real user behavior. Some projects are breeder-specific, but the engineering pattern is broader: complex operational software delivered end-to-end.
If you are a recruiter, hiring manager, or client evaluating fit, these case studies are meant to show technical ownership, product judgment, architecture decisions, and production outcomes.
Architecture
Multi-tenant SaaS, mobile apps, AI integrations, payment flows, registry systems, and operational dashboards.
Ownership
Most systems were designed, built, launched, instrumented, and maintained end-to-end as the sole or primary engineer.
Outcomes
Real users, production tenants, retained workflows, active partnerships, and systems used outside demo environments.
Gold Standard Gecko Club
Registry, member portal, and event system, live before NRBE 2026.
GSGC runs gecko conformation competitions at major reptile expos with sponsors including Pangea and Repashy. They needed membership, animal registry, event management, and payment workflows without replacing their existing website. What got built: a custom-branded tenant at gsgc.breedledger.co, operational ahead of NRBE 2026 in Daytona Beach (August 15-16), with member onboarding, animal registration, event entry, and administrative workflows handled through one system.
Engineering focus: modular adoption, tenant isolation, registry records, event payments, and operational workflows layered behind an existing public site.
ReptiDex
reptidex.com →AI-integrated iOS and web SaaS built end-to-end as sole engineer.
What changed: reptile keepers moved from scattered notes, spreadsheets, and memory into a structured operational record system with mobile-first husbandry workflows.
The Problem
Serious reptile keepers and breeders needed more than a simple pet log. Existing tools were either too shallow, too generic, or too disconnected to support genetics, husbandry history, pairings, offspring records, lineage, and long-term collection management in one reliable workflow.
What Was Built
Built the complete product as sole engineer: Python/FastAPI backend, PostgreSQL data model, React Native iOS app, Next.js web frontend, AI-assisted genetic predictions, husbandry notifications, product analytics, lineage tracking, feeding and weight workflows, and import/export tooling designed for long-term operational records.
Results
- Production iOS and web app launched publicly with real users and real collection data
- Hundreds of animals tracked across crested geckos, corn snakes, hognose snakes, and other reptile species
- Retention-focused product analytics, notification systems, and operational workflows built from direct user feedback
ReptiDex is the foundation of the breeding records apps I build for clients. Learn more about Breeding Records & Genetics App →
Geckistry (now ReptiDex + Breed Ledger)
reptidex.com →A custom breeding commerce platform that became the technical foundation for multiple production products.
What changed: the platform proved the architecture. The husbandry and genetics features became ReptiDex. The website builder and registry features became Breed Ledger.
The Problem
Standard e-commerce platforms cannot handle live animal sales with genetics data. Shopify does not know what a morph is. WooCommerce does not support pairing history. And no marketplace lets you control your brand, your pricing, and your buyer relationships the way a serious breeder needs to.
What Was Built
Built a custom breeding management and e-commerce platform with a genetics engine, individual animal pages, lineage-aware records, a checkout flow designed for live animal sales, admin inventory controls, pairing management, buyer communication workflows, and reusable architecture later split into ReptiDex and Breed Ledger.
Results
- Production platform that ran a real crested gecko breeding business
- 30+ allele genetics engine built from actual pairing data
- Technology now powers ReptiDex (records) and Breed Ledger (breeder websites)
The technology behind this platform now powers the sales systems I deliver to clients. Learn more about Sales & E-Commerce Platform →
Texas Top Notch Frenchies
texastopnotchfrenchies.com →A custom breeder storefront focused on trust, buyer confidence, and maintainability.
What changed: the breeder now has a site that matches the quality of the program and supports buyer trust from the first visit.
The Problem
Texas Top Notch Frenchies needed a professional website that matched the quality of their breeding program. The existing site did not reflect the level of care and investment that goes into producing healthy, well-bred French Bulldogs.
What Was Built
Delivered a custom Shopify storefront tailored for a French Bulldog breeder with professional photography integration, puppy listing pages, inquiry paths, maintainable content structure, and a design system focused on buyer trust rather than generic e-commerce templates.
Results
- 5-star Google review from the client
- Ongoing client relationship with continued maintenance and updates
“Very creative and knowledgeable. Gets the tasks completed quickly and is very thorough. Would definitely recommend.”
This is an example of a custom breeder website built for a client. Learn more about Custom Breeder Websites →
Need someone who can own the system end-to-end?
Whether you are hiring for a senior engineering role or need a custom operational platform, I can walk through the architecture and tradeoffs behind any project on this page.
Prefer email? dmumphrey@builtbydusty.com
Not ready for a custom build?
Start where most breeders should start.
Free tools, the contract kit, and Breed Ledger cover almost everything. The case studies above are for breeders whose problems were beyond what those could fix.
Free, no signup
Free Breeder Tools
Browser-based tools that solve specific breeder problems in minutes. No signup, no email gate, no upsell. Open one, use it, close the tab.
- COI calculator with 3-generation inbreeding analysis
- Pedigree certificate generator
- Crested gecko morph calculator with lethal-pairing warnings
- Puppy listing SEO checker
Need something custom? See custom builds →