Principal Software Engineer - Revenue Hub

Proven experience building and scaling distributed systems with strict correctness requirements.

Strong instincts for API and platform design.

Background working with complex state machines, financial flows, or high-integrity data models.

Familiarity with agentic systems and what it means for AI to safely act on structured data, not just read it.

The ability to work horizontally across many teams and get alignment on platform patterns.

In addition to cash compensation, some roles are eligible to participate in HubSpot’s equity plan to receive restricted stock units (RSUs).

We're looking for a Principal Software Engineer to help shape the technical future of Revenue Hub.

You'll write code, dive into services, review tough designs, debug messy systems, and directly own the architecture behind CPQ, Billing, Payments, and Revenue OS.

A big part of this role is defining how external developers and AI agents interact with those surfaces safely and predictably.

Build a simple, consistent, extensible platform

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 in the UI, over the API, and inside agent-driven workflows.

Revenue Hub is building the backbone for businesses to sell, bill, get paid, and manage revenue inside HubSpot. Our systems handle billions of dollars in transactions, so correctness, clarity, and predictability matter.

We're building a commerce platform where the data model, APIs, and flows are first-class. Reps, admins, and agents all work from the same foundation. The vision is a single, connected revenue flow: Contact to Deal to Quote to Order to Contract to Invoice to Payment to Reconciliation. When that flow is clean and trusted, revenue context becomes available across the whole business: marketing can attribute spend to real revenue, sales can forecast on actual billing behavior, and service teams can see renewal risk before it's too late.