Full Stack Engineer, Growth

What Do We Do? Triple Whale is the AI operating system built for modern ecommmerce. We help you see what's actually working in your business, what's not, and what to do next.

Then we take action for you — pausing the underperforming ad, generating the next batch of creative, flagging the inventory risk before it bites. We pull every signal in your business into one place, and put it on the most trusted measurement foundation in the industry. And on top of that, we give you the most actionable AI in commerce — Moby 2 — letting you tap any LLM you want, grounded in the full context of your business.

Moby 2 doesn't just surface insights, it executes decisions for you, with automations that make the rest of your stack smarter. The result: more than 60,000 brands like Pressed Juicery, OUAI, and True Classic turn mountains of complex data into actions that actually grow profit, at a speed and scale that is not humanly possible. What You're Applying For We're hiring a full stack engineer to own the in-product growth surface at Triple Whale.

Your primary focus will be building the experiences that drive customers to activate, adopt key features, and upgrade to higher-tier plans through self-serve flows. This means you'll own things like upgrade prompts, gating experiences, onboarding flows, in-product messaging, trial mechanics, and feature discovery moments. You'll also build and maintain the experimentation infrastructure that lets the team run A/B tests and iterate quickly.

You'll work closely with the product lead on Moby and partner cross-functionally with product, sales, CS, and marketing. The role is roughly 80% frontend and 20% backend, with backend work covering things like API endpoints for experiment configuration, usage tracking, PQL scoring logic, and integrations with internal systems. You should also be comfortable using AI tools to accelerate your work and building features that incorporate AI capabilities.

The majority of your time will be spent on growth-specific work, with some contribution to core product as needed. What You'll Work On Growth Surfaces and Upgrade Flows You'll build the frontend experiences that drive self-serve conversion: upgrade modals, plan comparison views, usage limit messaging, gating experiences, and in-product CTAs. These need to feel native to the product, not bolted on.

You'll work closely with product to design, test, and iterate on these flows based on real user behavior and experiment results. Experimentation Infrastructure You'll own the frontend side of the growth experimentation stack. This includes implementing feature flags, building A/B test variants, instrumenting events for analytics, and ensuring the team can run experiments quickly without shipping fragile code.

You should be comfortable working with tools like LaunchDarkly, Statsig, or similar, or building lightweight equivalents when needed. Onboarding and Activation You'll build the in-product experiences that help new and existing customers hit activation milestones faster: guided flows, tooltips, checklists, contextual nudges, and feature education moments. The goal is to get customers to the value that makes them want to upgrade, not just to show them a paywall.

Analytics Instrumentation Growth decisions are only as good as the data behind them. You'll be responsible for ensuring clean, reliable event tracking across the growth surfaces you build so the team can measure activation, conversion, and feature adoption accurately. Core Product (as needed) While growth is your primary focus, you'll also contribute to core product work when priorities call for it.

This keeps you connected to the broader product experience and ensures growth surfaces stay consistent with the rest of the platform.

What We'Re Looking For

Must-haves: 2+ years of professional full stack engineering experience with a frontend emphasis, primarily in React with backend experience in Node.js, Python, or similar Experience building UI that sits in the c