Sumaira K A

Senior Blockchain Engineer with 5+ years of experience architecting secure, gas optimized smart contracts and building full stack blockchain applications across EVM and nonEVM networks including Ethereum, Solana, Polygon, BNB Chain, Avalanche,

Arbitrum, Optimism, zkSync, Gnosis, and Tezos. Proven expertise in DeFi, token bridging, and scalable payment infrastructure, with strong proficiency in React, Node.js, and AWS cloud deployments. Deep understanding of asset custody, cross chain settlements, and high throughput crypto transaction systems.

Key Achievements

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Smart Contract & Protocol Expertise: Proven experience in designing and auditing complex staking platforms, DEXs,

and tokenized asset systems using Solidity, Rust, and Anchor. Skilled in building cross chain bridges, asset tracking systems, and L1/L2 integrations using LayerZero like protocols. Developed smart wallet infrastructure with secure custody, token bridging, and gas efficient flows.

•Full Stack & DevOps Proficiency: Led full cycle development across multichain platforms from smart contract logic to frontend dashboards using ReactJS, Node.js, and WebSocket APIs. Experienced with Docker based environments,

TurboRepo monorepos, and CI/CD pipelines using GitHub Actions and GitLab CI for automated deployment and testing.

•Data Indexing & Integration: Integrated on chain data solutions using RPC endpoints, The Graph, and custom

Subgraphs to enable fast, reliable querying and analytics. Designed SDKs, APIs, and CLI tools to support developer onboarding and efficient dApp integration.

•Security, Performance & Communication: Strong focus on secure and optimized code performed manual audits and used tools like Slither and Mythril, achieving up to 40% gas cost reduction. Experienced in presenting smart contract architectures, audit results, and system designs to both technical and non technical stakeholders. Collaborated effectively with distributed teams and independently managed complete development cycles.

•Blockchain Fundamentals & Innovation: Deep understanding of blockchain consensus models including Proof of Stake,

Proof of Work, and Layer 2 scaling solutions like zk rollups and optimistic rollups. Practical knowledge of core cryptographic principles such as digital signatures, Merkle proofs, public/private keys, and zero knowledge proofs.

Passionate about DeFi, interoperability, and staying at the forefront of Web3 innovation.

•Payments/Fintech: Handled high volume token transfers and money movement logic across multi chain systems involving staking platforms, liquidity pools, token swaps, and cross chain bridges.

I am an M.Tech graduate in Computer Science and Engineering. I am also a Certified Ethereum Developer.