Growth Engineer

About Agent Mercer

Autonomous commerce starts here.

A merchant should be able to describe a store and have it exist — landing page, product pages, cart, checkout — then have the money layer underneath it run without a team watching it. Routing, tokenization, subscriptions, disputes. Agents do the work. The operator signs off on anything that moves money.

Payments, tokenization, checkout, subscriptions and dispute prevention give our agents the context and tools to do the work.

The Role

Help merchants get from their first visit to a store launch faster.

Own the landing pages, onboarding, activation tracking and experiments that help merchants launch. You will write production code and decide what to test.

Responsibilities

• Own activation end to end: define what a live merchant means, instrument it, and move the number
• Build and ship landing pages, onboarding flows, and in-product prompts that get a merchant to a working storefront
• Design and run experiments with enough statistical care that we believe the result
• Build the analytics layer — event schema, funnels, cohort retention — so decisions are grounded in behavior rather than opinion
• Instrument and improve checkout conversion for merchants on our rails, and turn what we learn into product defaults
• Own lifecycle messaging and the triggers behind it, working with the agents that already watch merchant state
• Work directly with the founders on positioning, pricing experiments, and which segments to pursue

Required Qualifications

• Three or more years building user-facing product with measurable growth outcomes you owned
• Strong frontend engineering — TypeScript, modern React, and the craft to make a page feel fast and finished
• Comfort in the backend when an experiment needs it: APIs, data models, event pipelines
• Fluency with product analytics and experiment design, including when a result is not significant
• Demonstrated ability to pick your own priorities from a messy funnel and defend the choice
• Strong written communication — you will be writing the copy you test

Preferred Qualifications

• Experience at an early-stage B2B or commerce company through a real activation push
• Experience with self-serve onboarding for a technical product
• Background in e-commerce, subscriptions, or payments
• Design sensibility strong enough to ship a page without a designer

Our stack

Frontend

React · TypeScript · Astro

Backend

NestJS · Node.js · TypeScript

Data

Supabase (PostgreSQL)

Analytics

Event pipeline · funnel & cohort analysis

Commerce

Shopify Admin & Storefront APIs (GraphQL)

Tooling

Sentry · Linear · GitHub