Principal Software Engineer - Commerce

HubSpot is an AI-powered customer platform that provides software and resources for businesses to grow. They are seeking a Principal Software Engineer to shape the technical future of Commerce Hub, focusing on building a reliable and extensible commerce platform integrated with their CRM.

Responsibilities:

• Shape the technical roadmap across CPQ, Billing, and Payments with strong, opinionated patterns
• Define and evolve core domain models so pricing, products, contracts, invoices, and payments behave predictably everywhere
• Create frameworks that make the platform easy to extend without adding complexity
• Write code regularly. Lead design reviews and build high-impact systems end-to-end
• Own large multi-team initiatives that span CPQ, Billing and Payments
• Take prototypes to production at scale
• Set patterns for extensibility, contract boundaries, financial correctness, event-driven consistency, and how AI/agents safely interact with commerce objects
• Push for simplicity where the domain wants to get complicated, and consistency where surfaces can drift
• Influence product strategy across CPQ, Buyer Portal, and Revenue OS
• Help teams make clear tradeoffs between speed, correctness, compliance, and long-term platform health
• Mentor senior engineers and tech leads
• Drive thoughtful design decisions and guide learnings from incidents and large migrations
• Help teams align on patterns that reduce complexity and increase reliability

Requirements:

• Proven experience building and scaling distributed systems with strict correctness requirements
• Background working with complex state machines, financial flows, or high-integrity data models
• Strong architectural instincts with a bias toward simplicity, consistency, and well-defined boundaries
• The ability to work horizontally across many teams and get alignment on platform patterns
• A habit of turning ambiguity into clear plans and working software—and staying hands-on every step of the way