Software Engineer at $15M Seed-stage infrastructure startup backed by Accel & Anthropic

You will build the foundational financial layer for the agentic economy, creating KYA (Know Your Agent) protocols and multi-rail payment systems. As an early engineer, you will own entire systems end-to-end, defining how autonomous AI agents access the API economy and move money in a machine-to-machine world.

• Design and implement mission-critical payments infrastructure, including automated wallets and spending controls specifically for AI agents.
• Architect robust, scalable systems that handle thousands of autonomous micro-transactions across diverse financial rails and cloud providers.
• Collaborate directly with the founders to solve complex problems at the intersection of identity, risk, and high-velocity financial movement.

• Proven experience building deep infrastructure, payments, or developer platforms at high-signal companies like Stripe, Modern Treasury, or Vercel.
• Exceptional engineering agency and a "frontier" mindset, with a strong conviction that AI is fundamentally reshaping how commerce functions.
• Mastery of modern tech stacks and the ability to navigate complex financial abstractions while maintaining the high-velocity output required at the seed stage.

• Build category-defining infrastructure at the absolute frontier of AI and fintech, creating the rails that allow autonomous agents to operate in the real economy.
• Join an elite founding team from Shopify, Affirm, and Modern Treasury, backed by top-tier investors including Accel, Menlo Ventures, and founders of Anthropic.
• High-autonomy environment with no PMs or specs; you own the product direction and ship with the urgency of a team building generational infrastructure.