Software Developer & IT Consultant
Harry Rosas
I build custom software and provide IT consulting for small businesses and startups. Based in Mamaroneck, NY — working with clients remotely and locally.
About
Building software that
actually ships.
My work spans desktop application development, cloud-connected backends, and the unglamorous-but-important work of keeping systems running reliably.
I work independently under my own EIN as a sole proprietor, offering custom development and IT consulting to clients who need work done well — not just done. I'm comfortable owning a project end-to-end, from architecture decisions to deployment, or stepping in to solve a specific problem on an existing system.
Technologies
Services
What I do
Custom Software Development
End-to-end development of desktop and web applications tailored to your business processes. From requirements through deployment — no handoffs to manage.
- Desktop apps (Qt/C++)
- Web backends (Django, FastAPI)
- REST API development
Systems Integration
Connecting the tools your business already uses. Third-party APIs, SMS/messaging platforms, payment systems, and cloud infrastructure — wired together cleanly.
- Third-party API integration
- Twilio / SMS workflows
- AWS infrastructure
IT Consulting
Technical guidance for small businesses navigating software decisions. Honest advice on what to build, what to buy, and what to skip.
- Software procurement guidance
- Troubleshooting & debugging
- Documentation & training
Work
Selected projects
PawnTrack
A multi-tenant pawn shop management platform built with Qt Widgets and a Django/DRF backend. Deployed to active clients, with features including inventory management, customer records, PDF ticket generation, JWT authentication, and AWS-hosted infrastructure.
Diamond Jewelry II
Business website for a New Rochelle jewelry and pawn shop. Built with Astro.js and deployed on Cloudflare Pages. Includes mobile-responsive navigation and custom privacy and terms documentation.
Contact
Let's work together
Have a project in mind, a problem to solve, or just want to discuss options? Reach out directly — I respond within one business day.