Viewing: profullstack.com

Enterprise experience, startup speed

I spent 30 years building products at companies where downtime costs millions and shipping late is not an option. Now I bring that same discipline to every project we take on.

At Yahoo!, I learned how to build at scale. At IBM, I learned how to architect for reliability. At PayPal, I learned what it takes to ship products that handle real money and real users. That experience is baked into everything we deliver.

Book a diagnostic

30+
Years

6+
Team members

15+
Satisfied clients

Security / Communications

QryptChat Quantum-resistant encrypted messaging

Problem: Existing encrypted messaging apps rely on cryptography that will be broken by quantum computers. There was no production-ready messaging platform using NIST-approved post-quantum algorithms with real-time voice, video, and text.

What we built: Built a full Progressive Web App using SvelteKit with ML-KEM-1024 (CRYSTALS-Kyber) key exchange and CRYSTALS-Dilithium signatures. Implemented real-time messaging with typing indicators and read receipts, encrypted 1:1 and group voice/video calls, phone-based authentication, multilingual support, and a Tor-accessible service for maximum privacy.

Outcome: Live and operational at qrypt.chat. Supports multiple languages, works across all devices as a PWA, and delivers quantum-safe encryption that meets NIST standards.

Fintech / Blockchain

CoinPayPortal Non-custodial crypto payment gateway

Problem: Businesses and AI agents needed a way to accept cryptocurrency payments across multiple blockchains without giving up custody of their funds. Existing solutions required KYC, locked funds in custodial wallets, or only supported a few chains.

What we built: Engineered a non-custodial payment gateway supporting 15+ blockchains including Bitcoin, Ethereum, Solana, and Polygon. Built escrow services with trustless fund holding, a multi-chain web wallet with CLI and REST API interfaces, real-time transaction processing under 1 minute, and an AI agent integration layer so tools like Claude and ChatGPT can autonomously create wallets and process payments.

Outcome: Processing 47,000+ transactions across 1,200+ merchants in 45+ countries with $8.2M+ in volume. 99.9% uptime. Live at coinpayportal.com.

SaaS / Marketplace

SaaSRow SaaS discovery directory

Problem: Software founders had no easy way to get their products discovered without paying for expensive ad placements or directory listings. Existing directories charged high fees and had slow approval processes.

What we built: Built a full-stack SaaS directory platform with free listing submissions, dofollow backlinks for SEO value, a fast approval pipeline, search and filtering, and category-based discovery. Designed for scale with server-side rendering and optimized for search engine indexing.

Outcome: Live and growing at saasrow.com. Provides a free distribution channel for SaaS founders with real SEO value from dofollow links.