Isaiah Guzman

Founded and grew a profitable service business, building a recurring client base through targeted social media marketing and referral-based outreach.

Managed all business operations autonomously: client scheduling, invoicing, supply chain procurement, and service quality control.

Built AI pipelines to process pharmaceutical vendor files using OCR (Tesseract, PaddleOCR) and RAG for data extraction and classification across 5+ vendor documents, reaching ~80% field-extraction accuracy.

Developed a RAG-based document retrieval system with LlamaIndex, optimized with chunk tuning and open-source LLMs (Mistral, Phi-2), improving top-5 retrieval relevance ~25% over baseline.

Conducted end-to-end evaluation of the document intelligence system — benchmarking OCR accuracy, RAG retrieval quality, and routing performance on a 50-query test set. Delivered a technical report on model trade-offs, optimization strategies, and deployment recommendations, and built a UI for demo purposes.

Lead technical production for live and streamed services, managing A/V systems, broadcast software, and multimedia pipelines for in-person audiences of 200+ and a remote stream.

Operate and troubleshoot audio, video, and streaming equipment live with minimal disruption.

Coordinate and train volunteers and staff for weekly and special-event productions.

Built a cross-platform iOS/Android/web app with React Native 0.81 and Expo SDK 54 (New Architecture), configuring TypeScript, Babel module-resolver aliasing, and platform build manifests.

Architected file-based navigation in Expo Router, using nested route groups to isolate the auth flow from a tab-navigated main app.

Developed a reusable themed component library and custom React hook driven by centralized design tokens, delivering automatic light/dark theming app-wide.

Designed and delivered custom websites for 2+ small business clients, managing full project lifecycles from requirements and design through deployment.

Built a responsive website using HTML and integrated multiple APIs, including Follow Up Boss, Zapier webhooks, and Google Analytics. Automated lead capture, saving 5 hrs/week of manual entry.