Khushi J.

👋 Greetings! I’m a seasoned US-based developer specializing in Blockchain, Mobile App Development, and Custom Software Solutions. With years of experience delivering secure, high-performance systems, I help businesses harness modern technologies to achieve meaningful, scalable results. 🔗 Blockchain Expertise – Focused on Security & Infrastructure I bring deep expertise in building secure, enterprise-ready blockchain solutions — including smart contracts, decentralized identity, and on-chain data integrity — with real-world applications across industries like supply chain, healthcare, compliance, and digital identity. ✅ My Blockchain Skillset Includes: • Smart Contract Development (Solidity, Vyper, Rust, Cairo) • Blockchain Architecture Planning & Security Audits • Private & Permissioned Blockchain Systems (Hyperledger, Quorum) • Blockchain-based Access Control and Authentication (DID/VC) • Zero-Knowledge Proof Integration (zk-SNARKs, Circom, Noir) • IPFS / Filecoin for secure, distributed file storage • Chain integration and node maintenance (Ethereum, Polygon, Base, zkSync) 📦 Typical Solutions I Deliver: • Smart Contract Systems with Upgradeability & Role-based Security • Blockchain-based Document Notarization and Audit Trails • Decentralized Identity (DID) and Verifiable Credential Systems • Traceability & Supply Chain Transparency on Blockchain • On-chain Data Integrity with Privacy-Preserving Features ⚙️ Software Development Expertise In addition to blockchain, I offer full-cycle development for web and mobile apps, custom backend systems, and integrations with external APIs and services. 🧰 Web & Mobile Stack: • Frontend: React.js, Vue.js, HTML5, CSS3, Bootstrap • Backend: Node.js, Laravel PHP, Python • Databases: MySQL, MongoDB, Redis • Mobile: Native Android/iOS, Flutter, React Native • APIs: RESTful & GraphQL API Development & Integration • Dev Tools: Git, Docker, TDD (Unit Testing) 🔒 Security-Focused Engineering Security and reliability are core to every solution I build. From smart contract audits to secure API integration and data encryption, my work is designed with long-term maintainability and resilience in mind. If you're building an application that demands robust engineering, secure data practices, and scalable performance, let’s schedule a call and explore how I can help bring your vision to life.