0x's mission is to "Create a Tokenized World Where All Forms of Value Can Flow Freely".
Delivers a suite of developer APIs for faster trading, better prices, and superior user experience.
Founded in 2017, processed over 211M+ transactions and $180B+ in trading volume.
Investors include Greylock Partners, Pantera Capital, and Jump Crypto.
Responsibilities
Build new APIs and trading products, from researching the problem and designing the architecture to shipping the first version.
Maintain and extend existing APIs, including support for new chains, bridges and customer-requested features.
Keep APIs fast and reliable as traffic grows, and participate in the on-call rotation.
Investigate failed trades and stuck transfers using logs, traces and onchain data, and resolve the root cause.
Work with product, legal and GTM, turning business and compliance needs into technical decisions.
Write design documents and review teammates' designs and pull requests.
Requirements
6+ years of backend engineering experience, including at least 2 years in DeFi at a trading app, wallet, DEX aggregator, onchain data company or similar.
Senior or Lead Engineer with a track record of owning complex projects end to end.
Built and maintained developer-facing APIs.
Deep onchain knowledge, especially EVM: transactions, calldata, contract interfaces, gas and approvals.
Strong system design experience for production-scale backend services.
AI power user who uses it to multiply impact as an engineer.
Clear communicator, comfortable explaining technical tradeoffs to non-engineers.
Aligned with core values: do the right thing, consistently ship, and focus on long-term impact.
Able to attend annual in-person team offsites around the globe.
Nice to have
Experience with cross-chain/bridging, or DEX aggregation.
Experience with other ecosystems outside of EVM such as Solana.
Experience with TypeScript and/or Rust.
Conditions
Remote, EU timezones preferred.
Base salary range USD $150,000 - $230,000 + equity + ZRX tokens + benefits.
Comprehensive insurance (medical/dental/vision/life/disability) for U.S.-based employees — 100% of base plan covered for you and dependents.