Open to opportunities

Kunal User

@kunaluser10

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Rust backend and blockchain systems engineer building secure, scalable Web3 infrastructure.

India

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What I'm looking for

I’m looking for a team where I can build production-grade Rust Web3 infrastructure—Substrate pallets/off-chain workers, secure DeFi and cross-chain components, and scalable APIs—while contributing to security reviews, integration testing, and mentoring engineering delivery end-to-end.

I’m a Rust blockchain and backend systems engineer with 5+ years of experience designing and shipping decentralized infrastructure, distributed systems, and high-performance microservices across Substrate, Polkadot, Solana, Fuel, and EVM ecosystems. I specialize in custom FRAME pallet development, Substrate off-chain workers, consensus mechanisms, cross-chain bridges, DeFi protocol architecture, and scalable blockchain indexers.

At Unit Network, I’ve been a sole author and technical lead for a production off-chain worker system (gui-ocw), engineering a NonceManager for zero duplicate transactions under RPC faults and building resilient multi-source price oracle workflows. I also built on-chain DeFi primitives like an AMM/DEX FRAME pallet (unit-swap) and contribute to critical runtime pallets while conducting security-focused audits and mentoring engineers.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Blockchain Developer

Current

Unit Network

Sep 2024 - Present (1 year 10 months)

Sole author and technical lead of the gui-ocw off-chain worker system, a production Rust + Tauri v2 microservice handling deposit/withdrawal processing, price oracle, and cross-chain transaction verification. Built components including an atomic NonceManager with GRANDPA-bounded finalization, a multi-provider price oracle with fallback and rate limiting, and FRAME pallets such as an AMM DEX unit-s

Blockchain Developer

Planck Network

Feb 2024 - Sep 2024 (7 months)

Built custom Substrate FRAME pallets for a DePIN computing network in collaboration with protocol architects and infrastructure stakeholders. Contributed to the architecture and development of custom consensus mechanisms with a focus on fault tolerance and network security.

Rust FRAME Pallets Substrate Polkadot SDK Frame Consensus Fault Tolerance Network Security Architecture Design

Blockchain Developer

Coffee On Block

Apr 2023 - Nov 2023 (7 months)

Built Fuel Art NFT marketplace smart contracts on the Fuel blockchain using Sway, applying security-conscious contract design and peer code review. Developed a Rust-based blockchain indexer for marketplace analytics and exposed results via a REST API.

Security Focused Contract Design Sway Smart Contract Development Smart Contract Security Code Review Rust Blockchain Indexer REST APIs NFT Marketplace Indexing

Associate Software Engineer

Rapid Innovation

Apr 2021 - Mar 2023 (1 year 11 months)

Developed NFT marketplaces, DeFi protocols, and token swap backend microservices, translating product requirements into technical design. Worked across Solana, Polkadot, Flow, NEAR, and EVM ecosystems, building cloud-deployed backend services and integrating third-party APIs.