Senior Blockchain Engineer

EPAM Systems; Montenegro; Hybrid; BRL 506,000 - 675,000; Full time

Benefits offered by this job

Corporate and social events

Free English classes

Employee stock purchase plan

Medical package

Trust days

Learning platform access

Job summary

EPAM Systems is seeking a Senior Blockchain Engineer to design, implement, and optimize secure smart contracts using Solidity for the Ethereum ecosystem. You will develop decentralized applications and integrate backend services with contracts, while performing rigorous tests and gas optimizations.

The role requires deep knowledge of cryptography and DeFi protocols, with collaboration across product, security, and frontend teams to ensure high-performance protocol operation in a hybrid

Qualifications

• 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 deploying secure, production-grade smart contracts on mainnet.
• Strong understanding of cryptography, consensus mechanisms, DeFi protocols, and Web3 security best practices.

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.

Skills

Solidity

EVM

Smart contracts

Blockchain development

Gas optimization

Code reviews

Web3 security

DeFi protocols

Tools

Hardhat

Foundry

Truffle

Layer 2 (Arbitrum/Optimism)

Cross-chain bridges

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.

This position offers hybrid setup with the flexibility to work from any location in Montenegro, whether it's your home or our dynamic offices in Herceg-Novi and Podgorica.

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)

We offer

• We connect like‑minded people
• Experience exchange with colleagues from 55+ locations
• Corporate and social events
• Enjoyable working environment
• Personal career development, soft skills and well‑being programs
• Unlimited access to Internal Learning Platform
• Free English classes with certified teachers
• Participation in the Employee Stock Purchase Plan
• Comprehensive medical package (can be extended to family members)
• Four trust days per year for personal needs
• Benefits package (hotels, restaurants, stores and services)

EPAM is a leading global provider of digital platform engineering and development services. For over 30 years, our team has helped leading brands navigate the waves of digital transformation, building solutions that help them stay competitive through constant market disruption.

Thank you for your interest in this position. Please note that only candidates whose experience closely matches the job requirements will be contacted. If you do not receive an email from us, please do not be discouraged - feel free to apply for other positions that better align with your experience. If you have any questions, you can reach us at [e-mail].