Aditya Raj

Full-Stack Web3 Developer with production experience spanning React/Next.js frontends, Node.js backends, and Ethereum smart contract development. Designed and shipped the end-to-end architecture of a decentralized NFT marketplace (Puff Market) — including ERC-20/ERC-721 smart contracts, Minimal Proxy Factory collection deployment, atomic trade settlement, anti-sniping auction mechanics, and IPFS-based media storage. Strong in bridging on-chain and off-chain systems: real-time blockchain event listeners, wallet authentication via signed nonces, and DB sync layers.

Equally comfortable owning full product delivery — from Figma to deployment — or going deep on a single blockchain layer.

Full-Stack Developer & UI/UX Designer - Nspark Software LLC

(2026-01 - 2026-05)

Led end-to-end development of multiple web applications — Figma wireframes through to production deployment.

• Built reusable component libraries in React.js and Next.js (SSR/SSG); integrated third-party services including Cloudinary, Firebase, and Stripe.
• Architected and maintained RESTful backend services with Node.js/Express.js backed by PostgreSQL and MongoDB.
• Reduced average API response time by ~30% through strategic database indexing and query optimization.
• Collaborated directly with stakeholders through rapid feedback cycles to prioritize and ship features.

Full-Stack Engineer (SDE) - WhatBytes

(2025-05 - 2025-12)

Shipped features across frontend, backend, and database layers in a fast-paced product team (multiple features per sprint).

• Built a JavaScript automation engine to collect, filter, and process LinkedIn job data across 50+ US regions, eliminating significant manual effort.
• Designed data-heavy analytical dashboards with React and Recharts, handling complex datasets without UI performance degradation.
• Improved overall system responsiveness by ~30% through query optimization, indexing, and client-side state management.
• Architected modular application structure to improve scalability, readability, and long-term maintainability.

Web3 Integration Developer - Freelance

(2024-01 - 2025-12)

• Integrated deployed Solidity smart contracts into React/Next.js frontends using Ethers.js — handling wallet connections, transaction signing, contract reads/writes, and error states.
• Implemented real-time blockchain event listeners to detect on-chain events (mints, transfers, sales) and sync state with a PostgreSQL database cache, ensuring UI accuracy without polling.
• Managed ERC-20 token approval flows and multi-step transaction sequences in the client layer, abstracting complexity for end users.
• Built wallet-based JWT authentication flows: nonce generation, signature verification, and secure session management.
• Coordinated data architecture between on-chain truth (Ethereum) and off-chain read layers (database), maintaining consistency through event-driven sync.

Frontend Developer Intern - ElPixala

(2024-11 - 2025-04)

• Converted Figma wireframes into production-ready React components with Next.js and Tailwind CSS, cutting design-to-code turnaround time significantly.
• Applied lazy loading, code splitting, and semantic HTML to improve page load performance and SEO scores.
• Participated in Agile sprint cycles and code reviews, consistently delivering on schedule.

B.Tech - Computer Science - UIET, Maharshi Dayanand University, Rohtak (2024-05)