On Chain Blockchain Analysis Jobs in Kentucky (NOW HIRING)

Fun is hiring a full-time Protocol Engineer in New York, NY. The role joins the core blockchain team and develops smart contracts and protocol implementations for Web3 payments infrastructure. Work mode is not provided by the employer. Salary, benefits, application deadline, start date, and street address are not provided by the employer.

The position requires production smart-contract development, blockchain architecture knowledge, cryptography knowledge, and experience with Solidity, Rust, Move, or a similar language. The engineer also works with DeFi protocols, token standards, cross-chain communication, testing, security audits, incident response, and on-chain debugging. The role concerns infrastructure used by cryptocurrency companies and fintech builders.

The applicant's production smart-contract work, protocol knowledge, and security experience provide the main evidence for the role. The application also requires a clear account of the blockchain languages and ecosystems used in shipped work.

The Protocol Engineer designs, develops, and deploys secure smart contracts across multiple blockchain platforms. The work supports infrastructure for consumer-facing financial technology applications, including onboarding, account access, and money movement.

Fun's infrastructure powers millions of transactions across multiple chains. The engineering role therefore covers code quality, protocol behavior, security review, and the operational response to issues that affect on-chain systems.

The engineer collaborates with backend and product teams on blockchain solutions. The work includes writing efficient tested code, taking part in security audits, researching blockchain protocols and DeFi primitives, and debugging on-chain incidents.

Cross-functional communication is part of the technical requirement. The engineer explains complex blockchain concepts to other teams while contributing to infrastructure decisions that affect payments and financial applications.

• Design and deploy secure smart contracts
• Develop protocol implementations across blockchain platforms
• Write efficient, tested code
• Participate in security audits and incident response
• Research protocols and DeFi primitives
• Debug on-chain issues

Fun requires strong production smart-contract experience and deep knowledge of blockchain architecture, consensus mechanisms, and cryptography. Hands-on experience with Solidity, Rust, Move, or a similar language is required.

The qualification set also includes DeFi protocols, token standards, cross-chain communication, and smart-contract security. Preferred experience includes multiple blockchain ecosystems, cross-chain bridges, oracles, interoperability protocols, high-volume DeFi or decentralized-exchange infrastructure, open-source protocol research, formal verification, and advanced smart-contract testing frameworks.

Fun builds onboarding and deposit infrastructure for fintech builders. The company focuses on financial infrastructure, engineering, product experience, smart contracts, cross-chain protocols, and decentralized finance.

The Protocol Engineer works on the core blockchain team in a New York setting. The employer does not provide a named bonus plan, insurance plan, equity program, paid leave policy, or other benefit for this position.

The position joins protocol engineering with payment infrastructure. Its technical scope includes smart contracts, blockchains, testing, security, and production incident work.

The official Lever page is the application route. The employer does not provide a salary, benefits, deadline, start date, street address, or application contact details.

The position is located in New York, NY. Work mode is not provided by the employer.

The role is full-time.

The employer names Solidity, Rust, Move, or a similar smart-contract language.

The role requires production smart-contract development, blockchain architecture and cryptography knowledge, DeFi and token-standard knowledge, cross-chain communication experience, and smart-contract security knowledge.

Fun places the role within payment infrastructure rather than a standalone research function. The engineer's work connects on-chain protocol behavior with user onboarding, account access, and movement of money through financial technology products.

The listing does not provide a closing date or start date. The official Lever record remains the application reference for engineers whose production smart-contract work matches the stated requirements.