Senior Full Stack Engineer
Straight from Ninjatech.Ai’s careers page. Apply on the company site — no recruiter, no middleman.
Senior Full Stack Engineer - Growth & Monetisation
Department: Engineering
Location: Sydney, NSW, Australia
Employment Type: FullTime
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 youll 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 were 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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