Senior Software Engineer API Products
0x Protocol facilitates digital asset settlement through a permissionless standard for on-chain trades.
Distributed
Funding history
Projects
About 0x
0x Protocol helps developers build financial applications by providing infrastructure for secure trading of digital assets across multiple blockchains. Users can access aggregated liquidity from 100+ sources, execute gasless transactions, and integrate token swaps with minimal friction.
Skills
About the Role
You will lead backend API and trading-product projects from research and architecture through production. You will extend existing APIs for chains, bridges, and customer needs; improve reliability and performance; investigate failed trades and transfers; participate in on-call; and document and review technical designs.
Requirements
- 6+ years of backend engineering experience
- At least 2 years of DeFi experience at a trading app, wallet, DEX aggregator, onchain data company, or similar
- Experience owning complex projects end to end
- Experience building and maintaining developer-facing APIs
- Deep EVM and onchain knowledge, including transactions, calldata, contract interfaces, gas, and approvals
- System design experience for production-scale backend services
- Experience using AI tools as an engineer
- Ability to communicate technical tradeoffs to non-engineers
- Ability to attend annual in-person team offsites
Responsibilities
- Build new APIs and trading products from research and architecture through initial production release
- Maintain and extend existing APIs for new chains, bridges, and customer-requested features
- Keep APIs fast and reliable as traffic grows
- Participate in the on-call rotation
- Investigate failed trades and stuck transfers using logs, traces, and onchain data
- Resolve root causes of failed trades and transfers
- Translate product, legal, GTM, and compliance needs into technical decisions
- Write design documents and review teammates’ designs and pull requests
Benefits
- Equity
- ZRX tokens
- Comprehensive medical, dental, vision, life, and disability insurance for U.S.-based employees, with 100% of the base plan covered for employees and dependents
- 401k and FSA for U.S.-based employees
- Monthly mobile phone, wellness, and pre-tax transportation expense coverage
- Mental health benefits including professional therapy sessions
- Remote work environment
- Lunch reimbursement
- Remote/WFH equipment stipend
- 12-week paid parental leave
- San Francisco office access for employees in the region
- Flexible vacation
