Personal details

Charlie G. - Remote full-stack developer

Charlie G.

Based in: 🇺🇸 United States
Timezone: Central Time (US & Canada) (UTC-5)

About

Senior full‑stack JavaScript engineer with 15+ years of experience building and scaling cloud‑native, production systems. Deep specialization in React, Node.js, TypeScript, and applied AI engineering, including LLM integration, prompt design, and AI‑driven data workflows. Proven track record delivering enterprise SaaS platforms, modernizing front‑end architectures, optimizing cloud costs, and leading high‑impact engineering initiatives. Known for translating ambiguous business needs into simple, reliable, and scalable solutions

Work Experience

Full Stack AI Engineering
Independent / Freelancing | Sep 2025 - Present
Node.js
MySQL
React
Prisma
OpenAI
Tailwind css
Vite
AI model fine-tuning
Tanstack
Ollama

Built a production‑ready AI chatbot using OpenAI GPT models with strict context‑scoping to prevent irrelevant or unsafe responses. - Designed and refined prompt strategies that materially improved answer relevance and user trust. - Developed an AI‑driven customer review summarization system using MySQL‑backed data pipelines, storing structured summaries for downstream product insights. - Created an open‑source LLM playground enabling rapid model swapping and evaluation using Hugging Face models via Ollama.

Engineering Manager
SmartThings | Mar 2024 - Jul 2025
Git
Monitoring
Jira
Microservices
CI/CD
Observability
AWS

Led a device‑core engineering team delivering highly available connectivity and platform services (99%+ availability). - Owned roadmap execution, prioritization, and capacity planning to align engineering outcomes with business goals. - Hired, coached, and developed engineers while fostering psychological safety and high technical standards. - Partnered cross‑functionally with Product, UX, and Platform teams to translate customer needs into executable technical plans. - Improved CI/CD workflows, observability, and fault‑tolerant service patterns across microservices.

Projects

StartingGate
2018
MongoDB
Meteor
CSS3
LESS
Handlebars.js
JavaScript
- Designed and developed local Ski Resort ski school private lesson scheduling application with real-time airport-like lesson schedule displays around the ski school, scheduling conflict protection, lesson time slot limiting, recurring lesson tracking, etc. - UI/UX – Wireframes, High-fidelity mocks, UX workflows, etc. - Front End – Handlebars (dynamic HTML templating), LESS (CSS styling) - Backend – Meteor.js full stack API framework, User authentication, Node.js - Database – Designing and implement No-SQL database (MongoDB)

Education

University of Wisconsin–Stout
Bachelor's degree・Technology Education w/ emphasis in Telecommunications
Sep 1997 - May 2001