About the Role

We're a small, fast-moving team building an AI-powered pricing and monetization platform that helps B2B companies continuously optimize their pricing strategies — from packaging and willingness-to-pay analysis to deal coaching and CPQ. We're looking for a Founding Product Engineer to join us on-site in San Francisco and own significant product surface area from day one.

This is a hands-on, high-ownership role. You'll work directly with customers, leadership, and product to define architecture, ship production-quality systems, and ensure every feature can be driven by LLM agents. If you've thrived as an early employee or technical founder at a B2B startup — writing the code, talking to users, and setting engineering culture all at once — this role was written for you.

What You'll Do

Own entire product modules end-to-end: scope with customers, design versioned APIs, build the UI, ship, and iterate — without waiting on a PM.
Design and evolve architecture for agentic AI systems across Slack bots, terminal UIs, web interfaces, and vendor integrations.
Ensure features are drivable by LLM agents via MCP/FastMCP servers and conversational interfaces.
Move pricing and business logic off the client and into robust backend services to preserve financial fidelity.
Extend and maintain a typed pricing ontology (Pydantic models for SKU, Proposition, Persona, Pricing, and upcoming: Customer, Contract, Quote).
Lead architectural reviews and technical discussions to keep systems secure, extensible, and correct.
Establish testing, observability, deployment, and performance monitoring practices for AI-driven features.
Mentor peers, influence product strategy, and help 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 generation and automated review gates.

What We're Looking For

Required:

8+ years of software engineering experience, with proven ownership of full product areas at startup or staff-level scope.
Deep backend expertise — production experience with FastAPI, Python, and MongoDB (or a closely comparable stack).
Credible full-stack range: ability to design versioned REST/GraphQL APIs and ship polished React/TypeScript UIs independently.
Track record of taking ambiguous customer problems all the way to shipped features without PM support.
Experience gathering requirements directly from customers and translating them into product specifications.
Familiarity with B2B SaaS monetization concepts: pricing models, packaging, quoting, or CPQ.
Experience building or integrating AI-assisted features and agent-driven workflows (LLM interfaces, MCP-like endpoints, etc.).
High standards for correctness, especially for financial logic.
Must be authorized to work in the United States without visa sponsorship.

Nice to Have:

Built MCP servers or tooling for LLM agents.
Experience with billing, CPQ, metering, or pricing systems.
Experience with data-dense frontend components and/or conversational interfaces.
Familiarity with data residency, SOC 2 / GDPR constraints, and compliant development practices.
Prior technical founder, co-founder, or early employee who shipped a 0-to-1 B2B product to paying customers.

Compensation & Benefits

Salary: $200,000 – $250,000 USD annually, depending on experience.
Early-stage equity commensurate with a founding team member.
Direct impact on product direction and engineering culture from day one.

Location

This role is on-site in San Francisco, CA. Remote and hybrid arrangements are not available for this position. Visa sponsorship is not offered — candidates must be legally authorized to work in the United States.

Learn more about this Employer on their Career Site