Cross-Chain Web3 Payments Protocol Engineer

The Bitcoin Street Journal; New York (NY); On-site; USD 180,000 - 240,000; Full time

Job summary

Swiss Nexus is partnering with a technology company to build a Web3 payments infrastructure. We seek a Protocol Engineer to design and implement secure onchain systems across multiple blockchain networks, collaborating with backend engineers and product stakeholders to translate requirements into reliable protocol architecture.

You will own protocol work from initial design through production deployment, participate in security reviews, and stay current on DeFi primitives and interoperability

Qualifications

• Proven experience building and deploying production smart contracts on major blockchain platforms, including Ethereum and L2 networks.
• Solid understanding of DeFi protocols and token standards.
• Experience with cross-chain communication patterns and security-focused development.

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

Solidity

Cross-chain protocols

DeFi familiarity

Security mindset

Backend collaboration

Tools

Foundry

Echidna

Rust

Move

Job description

Swiss Nexus is partnering with a technology company to build a Web3 payments infrastructure. We seek a Protocol Engineer to design and implement secure onchain systems across multiple blockchain networks, collaborating with backend engineers and product stakeholders to translate requirements into reliable protocol architecture.

You will own protocol work from initial design through production deployment, participate in security reviews, and stay current on DeFi primitives and interoperability