Freelance UI Designers in San AntonioFreelance UI Designers in San Antonio
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Gabe Upton's avatar
Gabe Upton
San Antonio, USA
AI systems, full-stack apps, and engineering tools. Solo.
New to Contra
AI systems, full-stack apps, and engineering tools. Solo.
Cover image for Built Catalyst OS solo —
Built Catalyst OS solo — a full-stack SaaS platform for life optimization, from architecture to deployment. The platform includes 106+ interactive calculators across 13 engineering disciplines, 225+ structured learning modules with XP-based progression across 5 life dimensions, a 188+ article resource library with multi-axis filtering and full-text search, and an AI coaching system powered by Claude API with RAG, pgvector semantic search, and 5 distinct chat modes. Tech: Next.js 15, React 19, TypeScript, Tailwind CSS, Supabase (PostgreSQL + pgvector + Auth + RLS), Stripe subscriptions, Vercel deployment. This isn't a template or tutorial project. It's a shipped product handling real users and payments at catalystproject.ai (http://catalystproject.ai).
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Cover image for Built 130+ engineering calculators spanning
Built 130+ engineering calculators spanning 13 disciplines — process, pipeline, mechanical, civil, electrical, instrumentation, safety, operations, rotating equipment, tanks, utility, piping, and general. Originally deployed as an internal tool with a hosted dashboard for a midstream oil and gas operator. Now rebuilt as interactive web calculators in Catalyst OS, running client-side with React and TypeScript. Each calculator features validated inputs with unit handling, real-time computation, results export, and responsive design. Includes financial tools (debt payoff, FIRE number), health tools (TDEE, sleep debt, burnout risk), and engineering tools (pipe flow, heat transfer). Tech: React 19, TypeScript, Tailwind CSS. No backend calls — all math runs locally in the browser.
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Cover image for Built an AI coaching system
Built an AI coaching system called The Mirror — a context-aware assistant that learns about each user and delivers personalized insights across 5 life dimensions. Features 5 chat modes (Chat, Guided, Deep, Research, Insight), each with specialized prompts and behavior. Guided Intake builds a user profile through conversation, tracking understanding across key life areas. All responses grounded in a RAG knowledge base via pgvector semantic search. The research pipeline generates 6 evidence-based documents daily via Claude and ingests peer-reviewed papers from PubMed weekly — automatically chunked, embedded, and stored for retrieval. Tech: Next.js 15, Claude API, Supabase (pgvector + RLS), OpenAI embeddings, n8n. Shipped as a core feature of Catalyst OS with Supabase Auth and Stripe-gated Pro access.
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Cover image for Built a 21-workflow automation system
Built a 21-workflow automation system in n8n handling the full content lifecycle: trend scanning, AI generation, multi-platform publishing, performance analytics, and self-optimization. Includes daily Reddit and PubMed trend scanning, AI content generation via Claude, multi-platform publishing through Blotato, metrics collection and performance analysis, and a RAG research pipeline that ingests PubMed papers and generates evidence-based documents for the knowledge base. Also built an AI email triage system — Gmail and Outlook classified every 5 min by Claude, routed by priority, with auto-responses and daily digest to Telegram. Tech: n8n, Claude Sonnet 4, OpenAI embeddings, Supabase (PostgreSQL + pgvector), Telegram Bot API, PubMed E-utilities. Total cost: ~$14/month.
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UI Designer(1)
Gabriel Garza's avatar
Gabriel Garza
proSan Antonio, USA
Product-Driven Software Engineer
Product-Driven Software Engineer
Cover image for Mach.Exchange - Frontend Lead
Mach.Exchange - Frontend Lead
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Cover image for Tempfolio - Project Manager
Tempfolio - Project Manager
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16
Cover image for MetaJamz - Project Lead
MetaJamz - Project Lead
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Cover image for Lemni - Backend Engineering
Lemni - Backend Engineering
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31
UI Designer(3)
Keylan King's avatar
Keylan King
San Antonio, USA
Full‑stack dev & IT support for fast, reliable solutions
Full‑stack dev & IT support for fast, reliable solutions
Cover image for AI-powered recipe assistant SaaS
AI-powered recipe assistant SaaS
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Cover image for Ultraverse NFT Marketplace
Ultraverse NFT Marketplace
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1
Cover image for FlickFinder
FlickFinder
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Cover image for Skinstric.ai
Skinstric.ai
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1
UI Designer(1)
Jesus Cantu's avatar
Jesus Cantu
San Antonio, USA
i just want to make cool stuff
i just want to make cool stuff
Cover image for Manga Reading App - Toto Manga
Manga Reading App - Toto Manga
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Cover image for EA Desktop App
EA Desktop App
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2
Cover image for League of Legends - Companion App
League of Legends - Companion App
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2
Cover image for Bookmarked
Bookmarked
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3
UI Designer(1)