Blockchain / Smart Contract Developer

Location: Remote, United States
Job Type: Full-Time / Contract / Specialist
Work Arrangement: Remote
Department: Engineering / Product / Emerging Technology / Web3
Reports To: Engineering Manager / Technical Lead / Head of Product / CTO

Role Overview

We are seeking a technically strong and security-conscious Blockchain / Smart Contract Developer to build blockchain-based applications and smart contracts where relevant to product offerings. This role is responsible for designing, developing, testing, and maintaining secure smart contracts and supporting decentralized application functionality across blockchain-enabled products and platforms.

The ideal candidate has hands-on experience with blockchain development frameworks, smart contract programming, decentralized application logic, and blockchain transaction workflows. This person should be comfortable working on contract architecture, security considerations, integration testing, and Web3-related engineering requirements while collaborating with product, engineering, and architecture teams.

This is a remote USA-based role, best suited for a specialist with strong smart contract design and blockchain engineering capability. It is typically most effective as a focused specialist role where there is a clear and proven product need for blockchain-based functionality.

Key Responsibilities

Smart Contract Development

• Design, develop, test, and maintain smart contracts for blockchain-based product features and decentralized workflows
• Write secure and efficient contract logic using relevant blockchain languages and frameworks
• Build contract structures that support business logic, token flows, permissions, transaction handling, and on-chain execution requirements
• Review and improve smart contract architecture for reliability, maintainability, and scalability
• Ensure contract implementations align with product requirements and technical design standards

Smart Contract Review & Audit Support

• Conduct internal reviews of smart contract logic, edge cases, state transitions, and execution behavior
• Support audit readiness by documenting contract functionality, assumptions, dependencies, and risk areas
• Identify and resolve vulnerabilities, logic flaws, gas inefficiencies, and contract security concerns
• Work with internal reviewers or third-party auditors to address findings and improve contract resilience
• Help establish safer development and review practices for blockchain code and deployment processes

Decentralized Application Engineering

• Support decentralized application logic and front-end or back-end interactions with blockchain networks
• Build or support wallet connectivity, contract invocation, transaction handling, event monitoring, and blockchain state interactions
• Work on application-layer logic that depends on smart contracts, token transactions, or decentralized workflows
• Support integration between on-chain and off-chain systems where required by the product architecture
• Help ensure decentralized application components remain stable, usable, and aligned with engineering standards

Blockchain Integrations & Transaction Testing

• Test blockchain integrations, contract interactions, transaction flows, and network behaviors across development and staging environments
• Validate transaction accuracy, event outputs, state updates, and interaction logic across smart contract-enabled features
• Troubleshoot blockchain integration issues related to network configuration, wallet behavior, failed transactions, gas usage, or contract execution
• Support test coverage for smart contracts and blockchain-enabled application flows
• Help maintain confidence in transaction reliability, correctness, and operational readiness

Security, Performance & Reliability

• Maintain smart contract security and performance by following secure coding practices and established development standards
• Review contract behavior for common blockchain risks such as reentrancy, access control failures, arithmetic issues, front-running exposure, and improper state management
• Optimize contracts for efficient execution, cost awareness, and long-term maintainability
• Support safe deployment, upgrade, and monitoring practices where applicable
• Contribute to stronger engineering discipline around blockchain reliability and production readiness

Web3 Engineering Collaboration

• Work on Web3-related engineering requirements across product, platform, and architecture initiatives
• Collaborate with product managers, designers, backend developers, frontend engineers, and architects to define and implement blockchain-enabled features
• Translate business requirements into practical blockchain solutions where blockchain use is justified and valuable
• Support technical planning, architecture discussions, and feasibility reviews for Web3 initiatives
• Help determine where decentralized approaches fit product goals and where conventional approaches may be more appropriate

Requirements

• Bachelor’s degree in Computer Science, Software Engineering, Information Systems, or a related field preferred
• Proven experience in blockchain development, smart contract development, Web3 engineering, or decentralized application development
• Strong experience with Solidity, Rust, or relevant blockchain development frameworks
• Strong understanding of smart contract design, blockchain logic, and contract security principles
• Experience developing, testing, and maintaining blockchain-based applications or smart contracts
• Understanding of blockchain integrations, transaction flows, wallet interactions, and decentralized system behavior
• Ability to identify risks and improve smart contract security and execution quality
• Strong debugging, testing, and problem-solving skills
• Ability to work collaboratively across technical and product teams in a remote environment
• Strong documentation and communication skills

Preferred Qualifications

• Experience with blockchain ecosystems such as Ethereum, EVM-compatible chains, Solana, Polygon, Arbitrum, Avalanche, or similar platforms
• Familiarity with tools and frameworks such as Hardhat, Foundry, Truffle, Brownie, Anchor, Web3.js, Ethers.js, Wagmi, Viem, or similar
• Experience with smart contract testing, deployment pipelines, and audit preparation
• Knowledge of token standards, contract upgrade patterns, multisig workflows, and access control models
• Exposure to cryptographic concepts, signing flows, gas optimization, and chain-specific development considerations
• Experience integrating blockchain applications with backend services, APIs, databases, or product platforms
• Understanding of security review practices and common blockchain vulnerability categories
• Experience in a startup, product engineering, or emerging technology environment is a plus

Core Skills

• Smart contract development
• Blockchain engineering
• Solidity
• Rust
• Decentralized application development
• Smart contract security
• Blockchain integrations
• Transaction testing
• Contract performance optimization
• Web3 engineering
• Audit support
• Wallet and network interaction
• Secure coding
• Technical troubleshooting
• Cross-functional collaboration

Key Competencies

• Strong technical depth
• Security-first mindset
• High attention to detail
• Structured problem-solving ability
• Strong ownership and accountability
• Ability to work in emerging and evolving technical environments
• Clear communication across technical and non-technical teams
• Practical engineering judgment
• Reliability and discipline in testing
• Ability to balance innovation with product relevance

Success Metrics

• Secure and reliable smart contracts delivered to specification
• Reduced contract vulnerabilities and stronger audit outcomes
• Stable decentralized application behavior and transaction reliability
• Effective support for blockchain-enabled product features
• Efficient contract performance and maintainable code quality
• Clear documentation and stronger engineering confidence around Web3 components
• Good architectural judgment on when blockchain is and is not appropriate for the product

Working Conditions

• Fully remote role based in the United States
• Standard business hours aligned with U.S. time zones
• Frequent collaboration with product, engineering, architecture, and security stakeholders through virtual meetings and development workflows
• May support specialized product initiatives, blockchain experiments, or production Web3 features depending on business demand

Why Join Us

This role offers the opportunity to work on specialized blockchain and smart contract initiatives where decentralized technology adds real product value. You will help shape secure, well-designed blockchain functionality while bringing sound engineering judgment to an area that requires both innovation and discipline.