Ranjan Kumar

Engineered a secure and scalable ICO platform on Solana using Rust (Anchor) and Next.js, enabling real-time token sales and transparent on-chain tracking for testnet users.

Achieved sub-1-second (<1s) latency for live balance and token sale updates, significantly enhancing user experience.

Implemented a 'buy tokens' function that processed atomic transfers of over 50,000 tokens at a fixed 0.001 SOL/token, incorporating custom error handling for security and reliability.

Integrated wallet-adapter (Phantom, Solflare) with conditional UI, including auto-token account creation, achieving a 100% purchase success rate for admins and users.

Developed a scalable e-commerce platform using a microservices architecture with dedicated services for Accounts, Catalog, and Orders, each with its own domain-specific database.

Built a GraphQL API gateway to unify access across services, reducing client-side API requests by 40% and streamlining data retrieval.

Engineered gRPC-based inter-service communication for efficient, type-safe, and low-latency requests between microservices.

Adopted polyglot persistence by integrating PostgreSQL for transactional workflows and Elasticsearch for advanced product search, significantly improving query efficiency and user experience.

Built a real-time chat application supporting one-on-one and group chats (2–100 members), file sharing (<5MB), typing indicators, and online status for over 200 active users.

Integrated Socket.IO for live messaging and notifications, reducing delivery latency to under 100 ms and ensuring seamless communication.

Developed an admin dashboard with user, chat, and message analytics, enabling monitoring of over 10,000 messages/week.

Designed and implemented a friend request and user search system, improving user engagement and social connectivity by 35%.

Built a full-stack MERN application supporting user authentication, order placement, and secure payments via Stripe, complete with an admin dashboard for efficient menu, order, and refund management.

Engineered a real-time order tracking system (food processing → delivery) with 5-second refresh intervals for live updates, enhancing operational efficiency.

Integrated JWT authentication and bcrypt hashing, securing 100% of login sessions and effectively preventing unauthorized access.

Implemented scalable REST APIs and models for users, food, orders, and refunds, reducing database query latency by 30%.

Developed robust RESTful APIs using React.js, Node.js, and MongoDB, focusing on efficient query optimization, error handling, and secure data operations.

Implemented JWT authentication and role-based access control, significantly enhancing application security and user management.

Achieved a 25% reduction in page load times by leveraging server-side caching and asynchronous data handling with Promises.

Boosted frontend performance by 35% through strategic use of React Hooks, lazy loading, and memoization techniques.

Spearheaded 10 club events on campus, earning 'Best Club' recognition from the Cultural Board, IIT Guwahati.

Led a team of 12 members, managing all aspects of content production to promote the club's mission.