Kumar Satyarth — Smart Contract Engineer

Expertise in Smart Contract (5.0 yr.), DeFi Ecosystem (5.0 yr.).

Last verified on May, 2026

Core Skills

Solidity

5 yr.

Foundry

3 yr.

Bio Summary

DeFi-focused Smart Contract Engineer with 5+ years of experience in designing, deploying, and maintaining Ethereum mainnet and L2 protocols, including Liquid Restaking and AMM-based money markets.
Expertise in Solidity, Foundry, Hardhat, and security tools (Slither, Echidna) with hands-on experience in proxy patterns, ERC-20/ERC-4626 standards, and upgradeable vault architectures.
Proficient in backend development using Node.js, TypeScript, Python, and subgraphs (The Graph) to enhance protocol UX and operational efficiency.
Implemented CI/CD pipelines with Tenderly, CircleCI, and GitHub Actions, reducing contract failure rates by 40% and withdrawal processing time from 20 to 1 day.

Technical Skills

Programming Languages	Python, Solidity, TypeScript
Python Frameworks	Django REST framework
JavaScript Frameworks	Node.js
PHP Libraries and Tools	Phalcon
Data Analysis and Visualization Technologies	Decision Tree
Security	IT security audits
Cloud Platforms, Services & Computing	AWS
Deployment, CI/CD & Administration	CI/CD
Virtualization, Containers and Orchestration	Docker
QA, Test Automation, Security	e2e testing, Unit Testing, Usability tests
Blockchain and Decentralized Software	ERC-1155, ERC-20, Foundry, Hardhat
Methodologies, Paradigms and Patterns	FDD
Operating Systems	Firmware upgrades
Version Control	Github Actions
SDK / API and Integrations	GraphQL
Other Technical Skills	Blender 3D, Slither

Work Experience

Smart Contract Developer - Puffer Finance (Liquid Restaking Protocol and Institutional Vault)

Duration: June 2024 - Present
Summary:

Development and deployment of Puffer Finance's native Liquid Restaking Protocol (nLRP) and Institutional Vault to enable institutional staking with stable APR
The protocol supports multi-chain restaking flows integrated with EigenLayer and AVS, aiming to optimize liquidity and validator operations in the DeFi space

Responsibilities:

Developed and deployed smart contracts for the Liquid Restaking Protocol.
Designed and implemented the Institutional Vault for institutional staking.
Created a permissioned validator flow for internal validators without bonds.
Integrated restaking flows with EigenLayer and AVS support.
Built subgraphs and backend services to enhance user experience and operational efficiency.
Established automated CI/CD testing pipelines using Tenderly, CircleCI, and GitHub.

Technologies: Solidity, Foundry, Tenderly, CircleCI, GitHub Actions, subgraphs (The Graph), Node.js, TypeScript

Smart Contract Developer - Timeswap Labs (DeFi Lending and AMM-based Money Market Protocol)

Duration: May 2021 - June 2024
Summary:

Contributed to the development of a decentralized finance protocol focused on lending and borrowing on Ethereum, including an automated market maker (AMM) based money market
The project aimed to provide efficient and secure financial services on-chain with backend support and SDK development

Responsibilities:

Developed and tested smart contracts and deployment scripts.
Assisted in building AMM-based money market protocol.
Supported backend systems using Django.
Contributed to SDK development and subgraph creation.

Technologies: Solidity, Hardhat, Django, Python, subgraphs (The Graph), SDK development

Freelance Blockchain Developer (Various DeFi and NFT Projects)

Duration: January 2022 - Present
Summary:

Provided freelance development services for multiple decentralized finance and NFT projects, including DAO governance, liquidity mining mechanisms, and NFT marketplaces
Delivered backend integrations and smart contract maintenance to support project goals

Responsibilities:

Built and maintained smart contracts for DeFi and NFT projects.
Developed DAO governance and liquidity mining mechanisms.
Implemented backend integrations using Node.js and related tools.

Technologies: Solidity, Node.js, TypeScript

Education

Bachelor of Information Technology
Dr. APJ Abdul Kalam University, India
2018 - 2022

Certification

Technical Head, DSC-WOW
Organized a national-level hackathon with 10,000+ registrations for workshops and 5,000+ for the hackathon.
Public Speaker
Delivered technical talks and workshops at national conferences, including DevFest New Delhi & Noida.
Hackathon Leadership
Organized over 50 technical events, including workshops and hackathons for the developer community.

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