Arsid – Typescript, Node.js, Svelte.js

It's a digital gaming marketplace focused on in-game virtual goods and gaming-related digital assets. The platform allows gamers to buy, sell, and trade items such as skins, accounts, currencies, and other digital collectibles in a secure and streamlined way.

• Designed and implemented core full-stack architecture (Node.js, TypeScript, React/Svelte) with scalable, well-separated services.
• Built and scaled marketplace features: listing engine, order processing, payments, and fraud-prevention workflows.
• Architected real-time systems with WebSockets and pub/sub for live order and transaction status updates.
• Optimized performance for high traffic using clustering, caching, and database query tuning.
• Led API design with stable contracts, role-based access control, and strong security practices.
• Wrote unit and integration tests, improved CI/CD pipelines, and resolved production issues.

It's a blockchain-powered EV charging payment platform that enables EV drivers to pay for charging sessions using crypto while earning tokenized carbon credits, bringing sustainability incentives directly to individual users instead of only large corporations.

• Designed and implemented core front-end architecture with React and TypeScript.
• Integrated Web3 wallet connections and managed blockchain transaction flows.
• Built reusable UI components and a scalable component system.
• Implemented real-time session and transaction status updates.
• Integrated third-party APIs for charging station data and payment processing.
• Optimized performance and ensured responsive UX across devices.
• Debugged complex Web3 transaction edge cases to improve reliability.
• Contributed to clean API contracts and secure authentication flows.

It's a decentralized finance (DeFi) lending platform that allows users to supply crypto assets, earn yield, and borrow against their holdings in a non-custodial manner.

• Designed and implemented the front-end architecture with React, TypeScript, and Web3 integrations.
• Built reusable, state-driven components for lending, borrowing, and position tracking.
• Integrated smart contracts via ethers.js/Web3 and managed full transaction lifecycles.
• Implemented wallet connection logic and secure on-chain interaction flows.
• Optimized performance and kept blockchain data and UI state in sync.
• Structured clean API and contract interaction layers for maintainability.
• Debugged complex issues around gas estimation and contract calls.
• Delivered a production-ready, scalable DeFi dashboard end to end.

It's a sustainability-focused digital platform designed to help individuals and organizations measure, reduce, and offset their environmental impact.

• Designed and delivered full-stack architecture to support scalable user and data management.
• Built interactive dashboards to visualize environmental impact and key sustainability metrics.
• Developed reusable front-end components and tightened overall UX consistency.
• Integrated third-party sustainability and emissions data providers into the platform.
• Optimized database queries and backend services for speed and reliability.
• Implemented authentication, role-based authorization, and secure API contracts.
• Investigated and resolved production issues, increasing platform stability.
• Added unit and integration tests to support long-term maintainability.