Senior Software Engineer, API Products

Remotefull timeRemote

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senior

$150k–$230k

H1B: no

0x Senior Software Engineer at 0x responsible for building and maintaining developer-facing APIs for trading products in the web3 space. Lead projects end to end and work closely with product and customers to deliver reliable and scalable API solutions.

Responsibilities

We’re hiring a Senior Software Engineer to expand what the API Products team can take on. You’ll lead projects from first idea to production, on new products and on the APIs that are already live, working closely with our product team and some of our biggest customers. This is a hands-on IC role for someone who wants real ownership and works well with little direction. Remote, EU timezones preferred.
Build new APIs and trading products, from researching the problem and designing the architecture to shipping the first version.
Maintain and extend our existing APIs, including support for new chains, bridges and customer-requested features.
Keep our 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 for your work and review your teammates’ designs and pull requests.

Qualification

Deep onchain knowledgeClear communicatorAligned with our core valuesExperience with cross-chain/bridgingExperience with TypeScript and/or Rust

Required

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: how transactions work, including calldata, contract interfaces, gas and approvals.
Strong system design experience for production-scale backend services.
You’re an AI power user who uses it to multiply your impact as an engineer, yet you don’t let it replace your judgment.
Clear communicator, comfortable explaining technical tradeoffs to non-engineers.
Aligned with our 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.

Preferred

Experience with cross-chain/bridging, or DEX aggregation.
Experience with other ecosystems outside of EVM such as Solana.
Experience with TypeScript and/or Rust, our main languages.

Benefits

Dental
Vision
401(k)
Equity/RSU
Parental Leave
Wellness

Company

0x

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Source: ashby

Active within the past hour

Remote-friendly

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