# Platform Engineer, Billing Systems

**Company:** [Wispr Flow](https://hotfix.jobs/companies/wispr-flow)
**Location:** San Francisco, CA
**Role:** Backend Engineering
**Salary:** $220k – $350k/yr
**Experience:** 7+ years
**Skills:** Python, FastAPI, Stripe, revenuecat, sequence, Postgres, workos, React, TypeScript, iap
**Posted:** 2026-07-27

> Own end-to-end billing systems for consumer, B2B, and enterprise motions at a fast-growing voice AI company. Reconcile across Stripe, RevenueCat, and Sequence while enabling rapid SKU and pricing experiments with perfect reliability.

## Job Description

## What You'll Do
- Own billing end to end, across consumer, B2B, and everything we bundle next.
- Allow us to ship new SKUs and pricing experiments in days.
- Keep billing state reconciled across RevenueCat, Stripe, Sequence and whatever comes after.
- Build the enterprise side out: seats, usage, cost centers, and the flexibility to mix them.
- Expand international coverage so paying us is invisible wherever someone is.
- Build the testing that lets us move this fast without breaking a charge.

## Requirements
- Your teammates call you the “most responsible and thorough engineer” they’ve met.
- You've built billing more than once, ideally for different motions.
- You've run a payments migration and nobody noticed it happened.
- You've argued with a finance team about a number and turned out to be right.
- You know why you shouldn’t hard-delete rows.
- You get excited by problems with lots of constraints and edge cases.

## Nice-to-Haves
- Experience with the tech stack: Python, FastAPI, Stripe, Sequence, RevenueCat, IAP, PostgreSQL, WorkOS, occasional React/TypeScript.

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**Apply:** https://hotfix.jobs/jobs/2a50f792-d1ef-445d-b57e-8b0149e996a3
**Canonical:** https://hotfix.jobs/jobs/2a50f792-d1ef-445d-b57e-8b0149e996a3