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Senior Full Stack Engineer - Growth & Monetisation

Ninjatech AiSydney, NSW, Australia

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Sydney · Full-time · On-site/hybrid

Self-serve consumers and enterprise seats run through the same billing and activation paths. This role owns the money and the funnel.

What you'll do

  • Build and own monetisation: plans, paywalls, subscriptions, credit and usage metering, auto top-up, access control and revenue share.
  • Own onboarding and activation end to end — signup, first task, first genuine result — and the experiments that improve them.
  • Build the analytics and experimentation foundations: events, funnels, attribution and A/B tests, so decisions come from data rather than opinion.
  • Work directly with payment providers and their failure modes: declines, webhooks, disputes and platform-specific quirks.

What we're looking for

  • 3–5+ years full-stack with shipped experience in payments, subscriptions or growth surfaces.
  • TypeScript/React and Python, plus SQL fluency — you can answer your own funnel question.
  • Comfort owning a metric, not only a backlog.
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