I’m a Software Engineer specializing in Full-Stack development, with deep experience in backend systems and infrastructure. I focus on building scalable, maintainable software and take ownership from design through production.

I write Rust for protocol-level performance and TypeScript for everything the end-user touches. My work spans smart contracts, cross-chain infrastructure, and production-grade distributed backend systems — message queues, caching layers, microservices, containerized deployments — with a growing focus on AI-augmented on-chain agents.

Led the development of the polkadot.js ecosystem — a critical suite of tools and libraries enabling developers to build and interact with Substrate-based blockchains. These open-source utilities, including APIs, UI components, and browser extension, are widely adopted across nearly every project in the Polkadot ecosystem, playing a crucial role in enabling seamless blockchain connectivity and interaction. Also, shipped the major projects at Polkadex, including the Orderbook Exchange, Thea Bridge and Polkadex SDK.

Over the past 5 years, I've immersed myself in the world of coding, continuously learning and growing with each project. From architecting robust backend systems to crafting seamless user interfaces, I'm committed to pushing the boundaries of what's possible in the realm of technology.

Languages: Rust · TypeScript · Solidity

Blockchain & Web3: Ethereum · Solana · Anchor · @solana/kit · Hardhat · Ethers.js · Polkadot.js · Substrate · The Graph

AI & Agents: LLM Integration · On-chain Agent Tooling · Autonomous DeFi Agents · MCP (Model Context Protocol) Servers & Client Integration

Backend & Infra: Node.js · Axum (Rust) · Express · GraphQL · REST APIs · PostgreSQL · MongoDB · Redis · RabbitMQ · JWT · Microservices · Docker · GitHub Actions · AWS (Amplify, S3)

Frontend: React · Next.js · Tailwind CSS · Jotai · Zustand · TanStack Query

Tooling & Practices: Git · Vercel · Vitest/Jest · ESLint/Prettier · System Design · API Design · Design Patterns · Architectural Patterns

• 🖥️ Portfolio: arjunporwal.vercel.app
• ✉️ Email: porwalarjun95@gmail.com
• 💼 LinkedIn: arjun-porwal-9198b71a3
• 🐦 Twitter/X: @arjun_porwal_33

I'm actively looking to collaborate on:

• Distributed backend systems — high-throughput APIs, event-driven microservices, real-time data pipelines
• Production reliability — structured observability (logging, tracing, alerting), graceful degradation, rate limiting, and database internals (query optimization, indexing, connection pooling)
• AI-powered blockchain tooling — agents that act on-chain autonomously
• DeFi protocols and DEXs — smart contracts, AMMs, cross-chain flows
• Developer infrastructure — SDKs, Indexers, RPC tooling for EVM / Solana / Polkadot

If you're building something in this space, let's connect.