The payments product is an orchestration layer across 5–6 PSPs that boosts merchant conversion 5–10% per month vs. running on a single provider. The engineer hired here will improve and optimize payments surfaces processing billions in transaction volume, build features and SDK components that other developers integrate into their own products, and ship reliable infrastructure that they often productize themselves. Backend is Ruby on Rails (unconventional but learnable), frontend uses conventional technologies including Next.js. Tech stack is not a filter — high-agency, zero-to-one engineering is.

What You'll Own

Improve and optimize payments surfaces processing billions in transaction volume

Build payments features and SDK components that developers integrate into their own products

Expand payment-method coverage to grow Whop's reach for creators and merchants

Write world-class developer docs and interactive playgrounds for the SDKs and components you ship

Build clean interfaces and APIs for frictionless payments operations — and productize the infrastructure you build, since there is no separate product layer to do it for you

Ex-founder or early engineer at a high-growth startup with a real dent — the core profile

Strongly backend OR strongly frontend — not superficially both

Built non-trivial systems zero-to-one and shipped them

Can evaluate and exercise judgment over AI-generated code — not just prompt-and-paste

Solves problems simply, without overcomplication

High agency, self-motivated, comfortable without engineering managers or guardrails

Product-engineering mindset — opinions on UX, ships features end to end

Can start within ~2 weeks and commit to 5 days/week in-person in Palo Alto

0–6 years of relevant experience, with seniority calibrated to the candidate's track record