0x
Senior Software Engineer, API Products
$150K–$230K
Remote · Remote · Senior · Full-time · Posted Oct 16, 2026
- Experience
- 7+ years of backend engineering experience, including at least 2 years in DeFi.
About the job
Leads end-to-end development and operation of developer-facing APIs and trading products, including 0x’s existing Swap, Gasless, and Cross-Chain APIs.
What you'll do
- Design, build, and ship new APIs and trading products; extend existing APIs with new chains, bridges, and customer-requested features.
- Improve API performance and reliability, participate in on-call, and investigate failed trades and stuck transfers.
- Collaborate with product, legal, and GTM; document designs and review designs and pull requests.
What they ask for
- 7+ years of backend engineering experience, including at least 2 years in DeFi at a trading app, wallet, DEX aggregator, onchain data company, or similar.
- Track record of owning complex projects end to end and experience building and maintaining developer-facing APIs.
- Deep onchain knowledge, especially EVM transactions, calldata, contract interfaces, gas, and approvals.
- Strong production-scale backend system design experience.
Nice to have
- Experience with cross-chain/bridging, DEX aggregation, or ecosystems outside EVM such as Solana.
- Experience with TypeScript and/or Rust.
Pay
USD $150,000 - $230,000 base salary
Tools
EVM, TypeScript, Rust, Solana
AI focus
Uses AI as an engineering productivity tool while retaining personal judgment.
Model-written summary · the original posting is authoritative