# Don Martirez — Lead Product Designer & Design Engineer

> Multi-disciplinary Product Designer and Design Engineer based in Duarte, CA (91010). 10+ years designing and shipping enterprise design systems, desktop workflow tools, and deterministic AI systems from problem definition through production.

## Profile Summary
- **Role:** Lead Product Designer & Design Engineer
- **Location:** Duarte, California 91010, United States
- **Specialization:** Design Systems, GraphRAG, Multi-Agent Swarms, Next.js, Low-Latency Web Interfaces
- **Primary Website:** https://don-the-imaginator.com
- **Experimental Lab:** https://don-the-imaginator.com/lab
- **Full Dossier (Unabridged):** https://don-the-imaginator.com/llms-full.txt

## Engineering & Design Principles
- **Start with the defect, not the idea:** Lead with behavioral analytics and broken funnels before opening Figma. Real user data dictates product decisions.
- **One surface cannot serve two clocks:** High-velocity recruiters have 30 seconds; technical evaluators have 30 minutes. The architecture intentionally segregates a zero-friction Swiss editorial landing page from an interactive live lab.
- **Deterministic math guards vs. LLM context:** "Math does math, language models provide context. Never confuse the two." Compiled algorithms (TA-Lib, Neo4j ontologies) enforce ground truth; LLMs provide contextual synthesis without hallucinating facts.
- **Restraint is the deliverable:** Built a 5-archetype CSS runtime engine that swaps complete design systems with zero layout shift (CLS 0.00), then selected a single, disciplined Geneva Swiss editorial canvas (#FAF9F6) for the primary experience.
- **0.00% Downtime Operations:** Live production systems require operational resilience. Automated watchdog daemons monitor cloud containers and keep Neo4j and API endpoints hot, preventing cold-start delays.

## Flagship Case Studies
- [Artstache](https://don-the-imaginator.com/lab/case-studies/artstache): Pedagogical Child Development & Knowledge Graph AI. Grounds generative AI in Viktor Lowenfeld's 80-year-validated developmental psychology stages via Neo4j property graphs and LangGraph. Transforms refrigerator art clutter into longitudinal cognitive milestones. Implements browser-based EXIF stripping, <80KB buffer optimization, and COPPA data minimization (~513ms median latency).
  - *Stack:* Neo4j Aura, Cypher, LangGraph, FastAPI, Next.js 16, Tailwind CSS.
- [3PM DAILY](https://don-the-imaginator.com/lab/case-studies/the3pmdaily): Autonomous Financial Market Intelligence. Replaces expensive $24,000/year institutional terminals with high-signal closing bell intelligence. Features 800+ equity ingestion pipelines, compiled TA-Lib C-wrappers for deterministic stop/target calculation, and a 9-persona LangGraph AI debate panel.
  - *Stack:* LangGraph, Gemini 2.5 Flash, FastAPI, TA-Lib, MySQL / Cloud SQL, ChromaDB, Next.js 16, Custom Stripe Elements.
- [Don The Imaginator / Portfolio 2026](https://don-the-imaginator.com/lab/case-studies/don-the-imaginator): Frictionless Design-Engineering System. Replaced a mandatory signup gate with an open-access showcase. Features an instant CSS custom properties theme engine (<10ms swap, CLS 0.00), local browser AI caching, and automated self-healing daemons, reducing bounce rates from 82% to 12%.
  - *Stack:* Next.js 16, TypeScript, Tailwind CSS, Neo4j GraphRAG, Python, FastAPI, Firebase, Docker, Google Cloud Run.
- [The Good Gnome](https://don-the-imaginator.com/lab/case-studies/the-good-gnome): Botanical E-Commerce Architecture. Frictionless Stripe checkout, real-time inventory management, and intuitive plant care requirement guides.
  - *Stack:* React, Firebase Firestore, Stripe Checkout, Tailwind CSS, Cloud Functions.
- [Kulture Kraft](https://don-the-imaginator.com/lab/case-studies/kulture-kraft): JDM Streetwear Brand Systems & Multimodal Video Pipelines. Spot-color vector separations, Remotion kinetic video generation, and high-traffic drop infrastructure.
  - *Stack:* Adobe Illustrator, After Effects, Remotion, Next.js, Shopify API.

## Technical Competencies
- **Design & Systems:** Design Systems, Token Governance, Human-Centered Design, Workflow Analysis, WCAG 2.1 AA Accessibility, Geneva Swiss Editorial Design, Figma, Information Architecture.
- **Frontend Engineering:** Next.js 16 (App Router), React 19, TypeScript, Tailwind CSS, CSS Custom Properties / JIT Theming, Cumulative Layout Shift (CLS) Optimization (0.00).
- **AI & Graph Systems:** GraphRAG, Neo4j Aura, Cypher Query Language, LangGraph, Multi-Agent Swarms, Context Caching, Prompt Engineering, Evaluation Pipelines (Golden Sets, LLM-as-a-judge).
- **Backend & Data:** Python, FastAPI, Node.js, Express, Firebase Firestore, MySQL / Google Cloud SQL, ChromaDB, REST APIs.
- **Cloud & DevOps:** Docker, Google Cloud Run, CI/CD, Automated Daemon Watchdogs, Vercel.

## Articles & Essays
- [My Design-Engineering Journey](https://don-the-imaginator.com/blog/my-design-engineering-journey): Chronological evolution from CMYK print ink plates and Capital Group financial report production to autonomous multi-agent systems and GraphRAG.
- [Why I Tore Down the Gates: Friction vs. Authorization](https://don-the-imaginator.com/blog/tearing-down-the-gates-ux-friction): How removing an authentication barrier in favor of open-access and local browser caching slashed bounce rates and tripled visitor engagement.

## Canonical URLs & Resources
- **Homepage:** https://don-the-imaginator.com
- **Lab & Demos:** https://don-the-imaginator.com/lab
- **Case Studies Index:** https://don-the-imaginator.com/lab#case-studies
- **Blog:** https://don-the-imaginator.com/blog
- **Resume (PDF):** https://don-the-imaginator.com/Don_Martirez_Resume.pdf
- **Full Dossier:** https://don-the-imaginator.com/llms-full.txt
- **Sitemap:** https://don-the-imaginator.com/sitemap.xml