1 year ago
Responsibilities
- Design, develop, and deploy secure smart contracts and protocol implementations across multiple blockchain platforms.
- Collaborate with backend and product teams to architect blockchain solutions meeting business requirements.
- Write efficient, well-tested code and participate in security audits.
- Research blockchain technologies, protocols, and DeFi primitives for integration opportunities.
- Contribute to incident response and debugging of on-chain issues.
Requirements
- Strong experience building and deploying production smart contracts on major blockchain platforms.
- Deep understanding of blockchain architecture, consensus mechanisms, and cryptographic principles.
- Hands-on experience with Solidity, Rust, Move, or similar smart contract development languages.
- Knowledge of DeFi protocols, token standards, and cross-chain communication patterns.
- Knowledge of common smart contract vulnerabilities and security best practices.
- Clear communication skills for explaining complex blockchain concepts to cross-functional teams.
- Preferred qualifications include experience with multiple blockchain ecosystems, crypto or Web3 infrastructure companies, cross-chain bridges, oracles, interoperability protocols, high-volume DeFi or DEX infrastructure, blockchain open source, protocol research, formal verification, or advanced smart contract testing frameworks.
About fun.xyz
Fun.xyz builds crypto payment infrastructure and developer tools—APIs, SDKs, and checkout—to let companies accept and send onchain payments across assets and blockchains. It sells enterprise-grade payments and wallet services to fintechs, consumer apps, and marketplaces, with usage-based and transaction fees. Privately held and headquartered in New York, it raised a Series A in 2026.