Founding Product Engineer

About the Role

We're a small, fast-moving team building an AI-driven pricing and monetization platform that helps B2B companies continuously optimize their pricing strategy - from packaging and willingness-to-pay analysis to deal quoting, discount governance, and CPQ workflows. We're looking for a Founding Product Engineer to own entire product modules end-to-end, work directly with customers, and help set the technical and engineering culture of the company.

This is a hands-on, high-ownership role at the founding-team level. You'll collaborate closely with customers, product, and leadership - and be expected to take ambiguous problems all the way to shipped, production-quality features. Financial logic correctness, AI-native tooling, and clean API design are first-class priorities here.
What You'll Do

• Own whole product modules end-to-end: scope with customers, design versioned APIs, build the UI, ship, and iterate.
• Design and evolve architecture for agentic AI systems spanning Slack bots, terminal UIs, web interfaces, and vendor integrations.
• Ensure product features are drivable by LLM agents via MCP/FastMCP servers and conversational interfaces.
• Move pricing and business logic off the client into backend services to preserve financial fidelity.
• Extend and maintain a typed pricing ontology (Pydantic models for SKUs, propositions, personas, pricing structures, etc.).
• Lead technical discussions and architectural reviews to keep systems robust, extensible, and secure.
• Establish testing, observability, deployment, and performance monitoring practices for AI-driven features.
• Mentor peers, influence product strategy, and shape engineering culture and best practices.
• Treat money-handling code as load-bearing infrastructure; prioritize root-cause analysis for production issues.
• Adopt and improve an AI-native SDLC where agents assist with code and automated review gates.

What We're Looking For

Required

• 8+ years of engineering experience with strong full-stack skills and proven ownership of product areas at startup or staff engineer scope.
• Deep backend expertise - experience with FastAPI, Python, and MongoDB or a comparable modern stack.
• Credible frontend skills with React and TypeScript ; able to ship a clean, polished UI independently.
• Track record of taking ambiguous customer problems to shipped features without a dedicated PM.
• Experience designing and building REST or GraphQL APIs with clear contracts and versioning.
• High standards for correctness, especially around financial or pricing logic.
• Must be legally authorized to work in the US - no visa sponsorship is available .

Nice to Have

• Interest or hands-on experience in B2B monetization: pricing models, packaging, quoting, billing, or CPQ.
• Familiarity with AI-assisted development tools (e.g. Cursor, Copilot) and experience integrating LLM agent tooling or MCP-like servers.
• Prior experience as an early or founding engineer at a startup.

Compensation & Benefits

• Salary: $200,000 - $250,000 USD annually
• Early-employee equity commensurate with founding-team scope
• Opportunity to shape product, architecture, and engineering culture from the ground up

Location

This role is on-site in San Francisco, CA . Remote or fully distributed arrangements are not available for this position.