Lane — Founding Full-Stack Engineer

David Joseph & Company is building the financial infrastructure for the agentic web, and they are seeking a Founding Full-Stack Engineer to develop their platform. The role involves end-to-end product development focusing on Agent Wallet and Agent Checkout, ensuring reliability and correctness throughout the stack.

Responsibilities:

• Product development across the stack: design and build features end-to-end, from merchant/developer interfaces through to services, APIs, and data models
• Agent Wallet & Agent Checkout: turn programmable payment credentials and agentic checkout into reliable, well-designed product surfaces
• APIs & integrations: design and maintain the APIs merchants, developers, and partners build on — keeping the external surface simple while absorbing underlying complexity
• AI & agent features: build software around LLMs and agents, including the tooling and guardrails that keep them dependable
• Reliability & day-to-day operations: share responsibility for testing, monitoring, and operational health; hold a high bar for correctness as the product grows
• Help shape the engineering culture as the 2nd engineering hire