Freelance Software Architects in California

Freelance Software Architects in CaliforniaFreelance Software Architects in California

Projects People

Crispin Courtenay

Enterprise AI architect: GraphRAG, agents, zero-trust.

Enterprise AI architect: GraphRAG, agents, zero-trust.

Cover image for MCP Market is the financial

MCP Market is the financial operating system for AI agents. Launching end of February 2026, it's the first platform that lets autonomous agents actually buy and sell stuff—think Stripe meets AWS billing, but for intelligent software. It solves the extension payment crisis (Chrome killed their payment system), enables agent-to-agent commerce with crypto rails, and meters AI resource usage down to fractions of a cent per API call. Developers can monetize their agents with granular pay-as-you-go pricing while users get "kill switch" budgets to prevent rogue agents from draining their wallets. It's cloud-grade billing infrastructure accessible to individual devs, bridging local AI runtimes with global payments through both fiat and USDC.

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Cover image for Git Conflict Management System for AI-Human Integration

Git Conflict Management System for AI-Human Integration

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Cover image for Autonomous Email and Planning Triage

Autonomous Email and Planning Triage

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Cover image for Unified Intelligence in Venture Capital Operations

Unified Intelligence in Venture Capital Operations

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Software Architect(2)

Senior Full Stack developer - Web and Mobile development

New to Contra

Senior Full Stack developer - Web and Mobile development

Cover image for Hidden Waste: How Networks Sabotage Data Center Investments

Hidden Waste: How Networks Sabotage Data Center Investments

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Cover image for Poker Chips and Accessories Collection

Poker Chips and Accessories Collection

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Cover image for Energy Management Solutions for NYC Buildings

Energy Management Solutions for NYC Buildings

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Cover image for Strava: Run, Bike & Hike

Strava: Run, Bike & Hike

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Software Architect(3)

Zach Vaillancourt

Los Angeles, USA

Application Development with a Silicon Valley Engineer

Application Development with a Silicon Valley Engineer

Cover image for Founder: Bloqqit (Developer Oriented CMS)

Founder: Bloqqit (Developer Oriented CMS)

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Cover image for OpenAI Agent System

OpenAI Agent System

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Cover image for Technical Cofounder: Visual note-taking web app with ChatGPT

Technical Cofounder: Visual note-taking web app with ChatGPT

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Software Architect(2)

proSan Francisco, USA

AI Campaign Assets + Agents for DTC Growth

$50k+: Earned

19x: Hired

5.0: Rating

213: Followers

Top

Partner

+1

AI Campaign Assets + Agents for DTC Growth

Cover image for Elysian DAO DeFi App

Elysian DAO DeFi App

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Cover image for Bliss Point: Engineering Craving with AI

Bliss Point: Engineering Craving with AI

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Cover image for Recess Spec Product Photography Campaign

Recess Spec Product Photography Campaign

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Cover image for Cinematic Storytelling for Liquor Brands

Cinematic Storytelling for Liquor Brands

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189

Software Architect(1)

Full-Stack Engineer & Product Designer (Mobile + Web)

7: Followers

Full-Stack Engineer & Product Designer (Mobile + Web)

Cover image for Showcasing the website for Drop The Routine with screenshots...

Showcasing the website for Drop The Routine with screenshots highlighting the clean, modern details. Drop The Routine is a creator platform that lets specialists and influencers build, share, and monetize structured routines — from fitness to skincare to finance. It features: 💡 A step-by-step builder that turns expert knowledge into guided routines 🛍️ Built-in affiliate tools for monetizing recommended products 📱 Seamless experience across web and mobile This project showcases full-stack design and development — React/Next.js/Chakra UI, React Native, and AWS infrastructure. It's been a blast to build!

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Cover image for Drop The Routine can be fully white-labeled for businesses a...

Drop The Routine can be fully white-labeled for businesses and clinics. This version was customized for a prominent sports physical therapy group here in Southern California — giving their patients (and athletes around the world) a seamless way to follow prescribed physical therapy routines, complete with videos, instructions, and progress tracking. It allows practitioners to: 🏥 Assign step-by-step recovery routines directly to patients 📱 Track engagement and outcomes through the app 💬 Educate patients between visits and reinforce accountability Built with React Native and AWS — scalable, branded, and deployable in days.

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Cover image for Excited to share this one! Drop The Routine is a web and mob...

Excited to share this one! Drop The Routine is a web and mobile platform where routines can be built, shared, monetized, and followed. It gives creators and specialists a new way to turn their expertise into income — and gives their followers structured, step-by-step routines designed for real results. Built-in progress tracking helps users stay consistent and accountable. From skincare and haircare to fitness, nutrition, and personal finance — Drop The Routine empowers creators across every niche to help their audiences follow through. This screen shows the creator landing page — where we introduce the platform’s vision and invite experts to join early. I built this with React/Chakra UI/Next.JS, all served and hosted on AWS infrastructure.

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Cover image for I built Didja — a minimalist habit tracking app — to help me...

I built Didja — a minimalist habit tracking app — to help me achieve my longterm goals by holding me accountable to daily action. It lets users define their goals, create daily or weekly routines that support them, and stay accountable through simple, structured tracking that promotes action. I designed it to be clean, distraction-free, and genuinely enjoyable to use. I finished it a few months ago, but I still use it everyday!

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Software Architect(1)

Gagandeep Singh

AI Automation & AI Agent Developer for Business Growth

New to Contra

AI Automation & AI Agent Developer for Business Growth

Cover image for FluxMotion is a private-alpha AI

FluxMotion is a private-alpha AI video creation platform designed to turn one creative idea into a structured media-production workflow. The product is being designed to help users move from a prompt to a creative brief, storyboard, scenes, voice, captions, quality review, and export planning from one interface. Current product and architecture foundations include: • Prompt-first video creation • Creative brief generation concept • Storyboard architecture • Scene and shot planning • Voice and audio workflow design • Caption and transcript design • Media-quality review design • Export pipeline design • Multi-provider architecture • Provider-routing design • Secure API-key and BYOK strategy • Multi-tenant control-plane design • Usage and cost-tracking design • Private media-storage design • Webhook and background-job architecture • Responsive product interface • Vercel deployment Technology stack and tools include Next.js, React, TypeScript, Tailwind CSS, Node.js, Supabase, PostgreSQL, Vercel, FFmpeg, OpenAI, webhooks, queues, workers, state machines, and private storage foundations. Potential video, image, and voice providers are being evaluated and are not represented as completed integrations. Status: Private Alpha Live project: https://omnimedia-engine.vercel.app

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Cover image for ALOS (AL Operating System) is

ALOS (AL Operating System) is a private internal operations platform built to centralize projects, AI agents, approvals, reporting, and execution into one secure workspace. It is designed to help founders manage products, engineering, operations, security, documentation, and business workflows from a single command center. Current platform foundations include: • Executive command dashboard • Project management • AI agent management • Human approval workflows • Role-based permissions • Multi-tenant architecture • Authentication • Audit logging foundation • Scheduled task management • Reporting foundation • Security management foundation • Operational monitoring • Workflow orchestration • Knowledge management • Team collaboration foundation Technology stack includes Next.js, React, TypeScript, Tailwind CSS, Node.js, Supabase, PostgreSQL, Row-Level Security (RLS), OpenAI, GitHub, Slack, Vercel, webhooks, scheduled jobs, and secure authentication. Status: Private Internal Platform Developed as the operational backbone for managing multiple AI products and business systems from a unified interface.

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Cover image for Crayox is an AI website

Crayox is an AI website creation and publishing platform that turns a normal-language prompt into an editable, responsive website. Users can describe the business, visual style, pages, content, and goals they want. Crayox is designed to interpret the request, plan the website structure, generate layouts and copy, prepare responsive previews, support revisions, and provide a publishing foundation. Current foundations include natural-language website requests, AI planning, website structure generation, design tokens, layout and component intelligence, copy generation, project management, dashboard, studio/editor foundation, version history, template gallery, publishing foundation, authentication, Supabase database, multi-tenant architecture, Row-Level Security, responsive generation, and quality-check foundations. Technology stack and tools include Next.js, React, TypeScript, Tailwind CSS, shadcn/ui, Supabase, PostgreSQL, OpenAI integration, Vercel, GitHub, Resend, and Stripe foundations. Status: Private Alpha Live project: https://crayox.dev

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Cover image for Pivot AI is an AI

Pivot AI is an AI voice receptionist for local service businesses. It is designed to answer incoming calls, understand customer intent, capture names, phone numbers, emails, and service needs, support appointment-booking workflows, and automate SMS or email follow-up. The platform uses OpenAI and OpenAI Realtime for conversational voice intelligence, Twilio Voice and SMS for calls and messaging, Google Calendar for scheduling workflows, Supabase and PostgreSQL for data storage, Resend for email notifications, and Vercel, Render, GitHub, and Sentry for deployment and operations. Current foundations include: • AI voice call handling • Lead capture • Structured caller information • Appointment workflows • SMS and email follow-up • Business-specific receptionist settings • Multi-tenant data architecture • REST APIs and webhooks • Health checks and monitoring foundations Technology stack: • Next.js • React • TypeScript • Tailwind CSS • Node.js • Fastify • Supabase • PostgreSQL • OpenAI Realtime • Twilio • Google Calendar • Resend • Vercel • Render • GitHub • Sentry Status: Founder-led Private Alpha Live project: pivotcalls.co (http://pivotcalls.co)

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Software Architect(1)

Long Beach, USA

Customer Experience + Ecommerce Consultant

Customer Experience + Ecommerce Consultant

Cover image for MODERNIZE CUSTOMER CARE WITH DATA-DRIVEN INSIGHTS

MODERNIZE CUSTOMER CARE WITH DATA-DRIVEN INSIGHTS

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Cover image for FULL-SCALE CUSTOMER EXPERIENCE SOLUTION

FULL-SCALE CUSTOMER EXPERIENCE SOLUTION

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Cover image for STREAMLINE WORKFLOWS AND ENGAGEMENT WITH AUTOMATION

STREAMLINE WORKFLOWS AND ENGAGEMENT WITH AUTOMATION

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Software Architect(1)

Joseph Ceccarelli

React Native & web app developer, fast turn around.

New to Contra

React Native & web app developer, fast turn around.

Cover image for Board Game Cafe is a

Board Game Cafe is a full-stack application I built for a small business facing a common problem: games were rented out without reliable tracking, so customers would show up expecting an available game only to find it already checked out, and staff had no easy way to see what was actually on the shelf. The app gives customers accounts to browse the catalog, favorite games, and check real-time availability before they arrive. On the staff side, it supports checking games in and out in just a few taps, links every rental to a customer account, and gives staff a live dashboard of what's out, what's due back, and what's overdue. Admins manage the catalog itself: adding games, tracking individual copies, and adjusting rental policy. Built with Next.js, PostgreSQL, and Docker, and self-hosted on the business's own server. What started as an availability problem became a full inventory and rental system that cut down on double-bookings and gave staff a fast, reliable way to track the shelf in real time. Pictured is an AI generated video with screenshots of the app.

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Cover image for Dinner Decider

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Cover image for I use all sorts of

I use all sorts of calculations in my day to day work, so I decided to put them all in one app. Then I decided to keep adding calculators until I had a whole suite!

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Cover image for Brew Buddy is a log

Brew Buddy is a log for home brewers where they can store custom recipes and then track their brews as they evolve.

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Software Architect(1)