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Product Engineer

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Product Engineer in USA new

  • fun.xyz
  • Full time
  • Email
  • San Francisco, CA

Responsibilities

  • Design and scale SDK software powering Checkout across web2 and web3 environments.
  • Build scalable, high-performance systems for on-chain payments and consumer-facing fintech applications.
  • Work across the stack with protocol, backend, and business teams.
  • Develop tools and infrastructure that balance performance, reliability, security, accessibility, and user experience.
  • Contribute to products from 0 to 1 and take ownership in a fast-paced environment.

Requirements

  • At least 3 years of engineering experience with JavaScript, TypeScript, and modern frameworks.
  • Strong full-stack development skills, including React and backend APIs.
  • Attention to detail in product design and user interaction.
  • A proven track record of building scalable, high-performance software.
  • Blockchain technologies, EVM-compatible networks, payments, SDKs, or crypto-related systems experience are preferred.
  • Open-source contributions or experience building SDKs or developer tools are preferred.

Benefits

  • Work on the future of payments and programmable money.
  • Collaborate with protocols, builders, and financial infrastructure providers.
  • Contribute to a mission-driven environment focused on access, openness, and trust.
  • The role is primarily in-person at the Midtown, NYC headquarters Monday through Thursday, with optional work-from-home Fridays.

Salary: $155k - $300k/yr

fun.xyz

Fun.xyz builds crypto payment infrastructure and developer tools—APIs, SDKs, and checkout—to let companies accept and send onchain payments across assets and blockchains. It sells enterprise-grade payments and wallet services to fintechs, consumer apps, and marketplaces, with usage-based and tran...

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