Freelancers using React in San Antonio

Freelancers using React in San AntonioFreelancers using React in San Antonio

Projects People

San Antonio, USA

Ranked 1# Software Engineer | AI | MVP | JavaScript | Python

Ranked 1# Software Engineer | AI | MVP | JavaScript | Python

Cover image for Bots - AI Image Generation SaaS

Bots - AI Image Generation SaaS

1

5

Cover image for NextMind AI SAAS

NextMind AI SAAS

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4

Cover image for Game Item Marketplace Platform

Game Item Marketplace Platform

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6

Cover image for Forge AI SAAS

0

4

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 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.

3

67

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.

2

40

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.

1

46

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).

1

41

Cameron Anchondo

San Antonio, USA

SEO Focused WordPress Developer

SEO Focused WordPress Developer

Cover image for Netflix Clone

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31

Cover image for Which House Should You Choose in Hogwarts Legacy?

Which House Should You Choose in Hogwarts Legacy?

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50

Cover image for 8 Creative Car Dealer Event Ideas to Boost Sales

8 Creative Car Dealer Event Ideas to Boost Sales

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2K

Cover image for How Does Housing In Boston Compare To Housing In Other Cities?

How Does Housing In Boston Compare To Housing In Other Cities?

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15

Mikael Thompson

I build complete AI systems fast. Backend to frontend, live.

New to Contra

I build complete AI systems fast. Backend to frontend, live.

Cover image for Dev Engine Labs

Dev Engine Labs

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1

Cover image for Freelance Shield: Production AI Product, Built in 24 Hours

Freelance Shield: Production AI Product, Built in 24 Hours

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0

Cover image for LeadFire: AI Lead Scoring SaaS, One Metaprompt

LeadFire: AI Lead Scoring SaaS, One Metaprompt

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1

Cover image for I architected and deployed this

I architected and deployed this autonomous AI tool specifically to solve the 'payment friction' problem freelance businesses face. Instead of relying on manual oversight, I built a system that actively scans invoices for legal loopholes, calculates late fees, and generates professional summaries—effectively turning passive document handling into a proactive profit-preservation engine.

1

30

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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17

Cover image for Tempfolio - Project Manager

Tempfolio - Project Manager

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16

Cover image for Lemni - Backend Engineering

Lemni - Backend Engineering

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31

Cover image for MetaJamz - Project Lead

MetaJamz - Project Lead

0

23

Timothy Rushing

I build simple workflow apps for small teams.

New to Contra

I build simple workflow apps for small teams.

Cover image for https://timbone72-cc.github.io/pwa-sample-portfolio/

https://timbone72-cc.github.io/pwa-sample-portfolio/

0

78

Cover image for A larger workflow app demo

A larger workflow app demo built around field records, saved work entries, expenses, pay-period summaries, and export/backup workflows. It shows how I build practical browser-based tools that help small teams track work, reduce repeated manual entry, and keep useful records from a phone or laptop

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76

Cover image for A larger workflow app demo

A larger workflow app demo for field records, saved work entries, expenses, pay-period summaries, and export/backup workflows. It shows how a small team could track work from a phone or laptop without a large software system.

1

63

Cover image for PWA Sample Portfolio: Workflow App Demos

PWA Sample Portfolio: Workflow App Demos

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1

San Antonio, USA

Full‑stack dev & IT support for fast, reliable solutions

Full‑stack dev & IT support for fast, reliable solutions

Cover image for Ultraverse NFT Marketplace

Ultraverse NFT Marketplace

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1

Cover image for FlickFinder

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1

Cover image for Skinstric.ai

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1

Cover image for AI-powered recipe assistant SaaS

AI-powered recipe assistant SaaS

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41

San Antonio, USA

Web development and Web design

Web development and Web design

Cover image for Front-end development

Front-end development

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52

Cover image for Full-stack development

Full-stack development

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29

Cover image for Full-stack developer

Full-stack developer

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16

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