Available for new projects
Software that runs your business — not just a demo.
Freelance full-stack developer. I build websites clients can edit themselves, e-commerce backends wired into QuickBooks and WhatsApp, AI voice agents that answer the phone, and the mobile apps to match.
- systems shipped
- 7
- systems shipped
- industries served
- 5
- industries served
- platforms — web & mobile
- 2
- platforms — web & mobile
Recent work
A mix of client sites, e-commerce backends, and an AI voice agent — live where the client is public-facing.
AI Call Center & Fleet Platform
Real-time AI voice agent (OpenAI's realtime API over Azure Communication Services) that answers support calls 24/7 in English and Spanish, grounded in a knowledge base — plus a fleet dashboard, mobile app, and billing system.
"My generator's throwing a low-oil alarm on unit 4."
Checking the fault code for that model now…
- OpenAI Realtime API
- Azure Communication Services
- FastAPI
- Next.js
EShop · QuickBooks Bridge
B2B ordering that creates the QuickBooks invoice and pings WhatsApp automatically.
- Django
- Celery
- QuickBooks API
Xtasis — Tienda Online
Ice cream D2C store with a decoupled payment-processor bridge, on redundant VPS hosting.
- Node APIs
- Payment bridge
HomeRepo
A LAN file-server with a file-explorer web UI — upload, browse, and zip-download shared folders from any device on the network.
Express · Multer · Archiver
Ficha de Costo — OMG
A costing/ERP tool for production sheets: material consumption, cost summaries, and Excel export from templates.
Django · Argon dashboard · openpyxl
What I bring
Full-stack, end to end — the frontend a client can edit, the backend that talks to the tools they already use, and the deploy that ships it automatically.
Frontend
Astro, Next.js, React — usually wired to a CMS the client can run without me.
AI voice agents
Real-time voice agents (OpenAI realtime API) over Azure Communication Services — speech-to-text, reasoning, and text-to-speech in one call, grounded in a knowledge base.
Backend
Django, FastAPI, Celery, Node/Express — REST APIs, background jobs, retry queues.
Integrations
QuickBooks, WhatsApp Business API, payment gateways — the parts clients actually depend on.
Mobile
React Native apps sharing a backend with the web dashboard.
Deployment
GitHub Actions → FTP/VPS, PostgreSQL, Redis — deploys that ship on push, not by hand.
Got a system that needs building?
Tell me what the business actually needs to happen — the order, the invoice, the phone call — and I'll tell you what it takes to ship it.
kumadev77@gmail.com