Daniel Rosario

I’m a Senior Software Engineer focused on designing and building scalable web platforms, with a strong track record delivering blockchain-integrated systems end to end. I combine secure backend architecture, high-performance frontends, and smart contract development to ship features that improve scalability and user outcomes.

Most recently, I designed and deployed full-stack architecture for blockchain-based systems using React, Node.js, Python/Django, and Solidity, improving system scalability and reducing page load times by 40%. I also developed and deployed smart contracts for NFT minting, staking, and gamified reward systems using Solidity and Rust, supporting over 25,000 NFT mints and $500K in staked value.

Previously at TypeHuman, I developed responsive frontends with React and Next.js for blockchain analytics and user dashboards, increasing daily active users by 25%. On the backend, I created secure APIs with Django and Node.js to interact with smart contracts, achieving 99.9% uptime and handling 100k+ API requests/month, while using Celery and Redis to improve off-chain indexing reliability and reduce missed data syncs by 95%.

Earlier, at Morphlabs, I built modular backends with Django REST Framework and FastAPI for multiple SaaS platforms, contributing to a 30% faster feature release cycle. I’ve also improved real-time communication using Django Channels and WebSockets (chat latency under 100ms), migrated legacy .NET systems to Python for 2x faster performance, and strengthened systems by integrating services like Stripe, Twilio, Google Maps API, and OAuth2 authentication.