1 year ago
Singapore, SingaporeSenior
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 that meet business requirements.
- Write efficient, well-tested code and participate in security audits to ensure protocol safety.
- Research and evaluate blockchain technologies, protocols, and DeFi primitives for potential integration.
- Contribute to incident response and debugging of on-chain issues to support protocol reliability.
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 smart contract development languages such as Solidity, Rust, or Move.
- Knowledge of DeFi protocols, token standards, and cross-chain communication patterns.
- Knowledge of common smart contract vulnerabilities and security best practices.
- Ability to explain complex blockchain concepts clearly 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 or 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.