Senior Blockchain Engineer

EPAM Systems Inc; United States; On-site; USD 150,000 - 210,000; Full time

Job summary

EPAM Systems seeks a Senior Blockchain Engineer to design, develop, and deploy secure smart contracts with Solidity on the Ethereum ecosystem. You will build robust dApps and integrate backend services with on-chain logic, ensuring high performance and reliability.

You'll conduct extensive code reviews, gas optimization, and comprehensive testing, while collaborating with product, security, and front-end teams to deliver production-grade blockchain solutions in a fast-paced environment.

Qualifications

• 5+ years of software engineering with a blockchain focus.
• Expert-level Solidity and hands-on experience with the Ethereum VM.
• Proven track record deploying secure, production-grade smart contracts on mainnet.
• Strong understanding of cryptography, consensus, DeFi, and Web3 security best practices.
• Experience with testing frameworks such as Hardhat, Foundry, or Truffle.
• Familiarity with Layer 2 scaling solutions and cross-chain bridge tech.
• Contributions to open-source blockchain projects or security audits.

Responsibilities

• Design, develop, and deploy secure smart contracts using Solidity for Ethereum.
• Architect and implement robust dApps and backend integration with on-chain logic.
• Conduct comprehensive code reviews, gas optimization, and unit/integration tests.
• Collaborate with product, security, and front-end teams for seamless integration and performance.

Skills

Solidity

Ethereum

Web3 security

DeFi

Cryptography

Smart contracts

Gas optimization

Open-source

Tools

Hardhat

Foundry

Truffle

Arbitrum

Optimism

zk-Rollups

Cross-chain bridges

Rust

Vyper

Job description

We are looking for a Senior Blockchain Engineer . If you are looking to give your career a real boost with a global leader in digital transformation, EPAM is the perfect choice.

Responsibilities

• Design, develop, and deploy secure smart contracts using Solidity for the Ethereum blockchain ecosystem
• Architect and implement robust decentralized applications (dApps) and backend integration with smart contracts
• Conduct comprehensive code reviews, gas optimization, and thorough unit/integration testing for all blockchain components
• Collaborate closely with product, security, and front-end teams to ensure seamless integration and top-tier protocol performance

Requirements

• 5+ years of software engineering experience with a strong focus on blockchain development and smart contracts
• Expert-level proficiency in Solidity and deep, hands-on experience with the Ethereum Virtual Machine (EVM) and Ethereum ecosystem
• Proven track record of designing, auditing, and successfully deploying secure, production-grade smart contracts on mainnet
• Strong understanding of cryptography, consensus mechanisms, DeFi protocols, and Web3 security best practices
• Nice to have Experience with smart contract testing and development frameworks such as Hardhat, Foundry, or Truffle
• Familiarity with Layer 2 scaling solutions (e.g., Arbitrum, Optimism, zk-Rollups) and cross-chain bridge technologies
• Contributions to open-source blockchain projects, developer tooling, or recognized security audit participation (e.g., bug bounties)
• Experience with zero-knowledge (ZK) proofs or alternative smart contract languages (e.g., Rust, Vyper)