Senior Software Engineer, API Products

Role: Senior Software Engineer, API Products

Company: 0x

Location: Remote (San Francisco HQ)

Salary: $95K–$230K + equity + ZRX tokens

Type: Full-time

About 0x:

• Mission: "Create a Tokenized World Where All Forms of Value Can Flow Freely"
• Processed 78M+ transactions, $140B+ volume via platforms like Matcha, Coinbase Wallet, Robinhood Wallet, MetaMask, and more
• Strong investor backing: Greylock Partners, Pantera Capital, Jump Crypto

Tech Stack:

• Primary: TypeScript, Node.js/Express
• Rust, Linux, GitHub
• AWS (Kubernetes, Kafka, Postgres, Redis, OpenSearch)
• Grafana LGTM for observability

Responsibilities:

• Build and lead development of complex backend systems and APIs
• Write secure, clean, high-quality code
• Lead and mentor engineering teams
• Launch new features regularly
• Improve software delivery processes
• Maintain focus on customer and user experience

Requirements:

• 7+ years experience solving distributed computing problems
• Experience designing systems with relational or key-value databases
• Skilled in event-driven, distributed architectures
• Cloud deployment experience (AWS preferred)
• Experience building external-facing REST/HTTP APIs
• Leadership experience on small to medium projects (2-4 engineers)
• Ability to research and apply new technologies thoughtfully
• Experience maintaining high-volume, critical SaaS/API platforms
• Up-to-date on application security trends
• Passionate about DeFi and its societal impact

Preferred:

• Solid understanding of blockchain fundamentals (especially EVM chains)
• Experience with JSON-RPC APIs for blockchain interaction
• Experience using Web3 libraries (ethers.js, Web3.js, viem)

Benefits:

• Full health/dental/vision/life insurance for US employees
• 401(k), FSA, wellness stipends
• Remote-friendly, with stipend for work gear
• Mental health coverage including therapy sessions
• 12-week paid parental leave
• Flexible vacation
• Global in-person meetups
• Convenient SF office for local employees