Web3 Payments Protocol Engineer

Swiss Nexus; New York (NY); On-site; USD 180,000 - 270,000; Full time

Job summary

Swiss Nexus is building a Web3 payments infrastructure and seeking a Protocol Engineer to design and implement secure onchain systems across multiple blockchains. You will collaborate with backend engineers and product stakeholders to translate business needs into robust protocol architectures, owning design, implementation, testing and production reliability.

The role emphasizes crypto-native expertise, security focus and end-to-end ownership from design to deployment, with opportunities to

Qualifications

• Proven experience deploying production smart contracts on Ethereum and L2 networks.
• Strong Solidity expertise.
• Experience with Rust or Move is advantageous.
• Solid understanding of DeFi protocols, token standards and cross-chain patterns.
• Security-minded with knowledge of common vulnerabilities and defensive practices.
• Ability to collaborate effectively with backend engineers and product stakeholders.
• Willingness to own protocol work from design through production deployment and ongoing support.

Responsibilities

• Design, develop and deploy secure smart contracts and protocol components across multiple blockchain platforms.
• Architect onchain payment and settlement infrastructure in collaboration with backend and product teams.
• Translate product and business requirements into robust protocol designs.
• Write efficient, well-tested smart contract code.
• Participate in internal and external security reviews.
• Research and assess new blockchain networks, DeFi primitives and interoperability protocols.
• Support incident response, debugging and remediation of onchain issues.
• Contribute to technical decisions affecting protocol security, scalability and reliability.

Skills

smart contracts

solidity

rust/move

DeFi protocols

security mindset

collaboration

protocol ownership

Job description

Swiss Nexus is building a Web3 payments infrastructure and seeking a Protocol Engineer to design and implement secure onchain systems across multiple blockchains. You will collaborate with backend engineers and product stakeholders to translate business needs into robust protocol architectures, owning design, implementation, testing and production reliability.

The role emphasizes crypto-native expertise, security focus and end-to-end ownership from design to deployment, with opportunities to