Senior Engineer, Growth

Alt Platform Inc•New York, NY

48d•$160,000 - $180,000•Hybrid

About The Position

You are our founding Growth Engineer, and you turn today's experiments into instrumented, repeatable systems across both sides of the marketplace — sellers and buyers. Attribution that we trust. A submission funnel we can measure step by step. Lifecycle messaging that is an owned system rather than a stack of per-campaign setups. Channels we can scale on purpose instead of by accident. The metric you own: unique submissions. It is our north star, the whole company watches it, and you'll be held to it with the same weekly-reported discipline we hold marketing to. This is not a marketing hire and not a generic backend hire. It's a technical owner who understands growth levers and can build them — thinks like a PM, builds like an engineer. You'll partner directly with our founder and our Head of Marketing, own the funnel end to end, and the ceiling here is running the growth function. The people who are great at this have stepped back from a backlog before, instrumented a funnel nobody had instrumented, found the real blocker, and gone after it without being asked.

Requirements

5+ years of engineering experience with strong backend (Python, Postgres, AWS or similar) and frontend (React, React Native, JavaScript/TypeScript) chops.
A track record of owning growth systems or product features from design to production.
Fluency with growth tooling and analytics — experimentation and A/B frameworks, product analytics (PostHog, Amplitude, or similar), attribution (AppsFlyer or similar), and lifecycle platforms.
A sharp instinct for funnels and instrumentation, and the patience to turn messy data into clean, trustworthy signal.
Comfort owning a north-star metric.
Strong collaboration and communication. You write great docs, ask smart questions, and give thoughtful feedback.

Nice To Haves

Familiarity with the collectibles space or alternative asset marketplaces. You collect, or you have a view on where this market is going.

Responsibilities

Rebuild the submission funnel end to end, instrument every step, and run a real experimentation loop on it — A/B testing, and re-engagement for the users who exit without submitting.
Work out which channels bring in real users on both sides — lifecycle, SEO, AEO, paid, mobile ads — and build the machinery to scale the ones that work. That includes agentic optimization: how Alt ranks and shows up in ChatGPT, Claude, Gemini, and other assistants.
Stand up clean attribution, consolidate our product analytics into a single source of truth, and modernize the messaging and deep-linking stack so we can finally tell what moved the needle.
Turn push, in-app, email, and SMS into an owned, instrumented system rather than per-campaign setups — including SMS opt-in compliance.
Watch the balance across bidders, buyers, and sellers, and build growth into whichever side is weak.