Apply on Employer Site

Channel3 · 2 days ago

Fullstack Engineer

New York, NY, US

Full-time

Onsite

Entry, Mid Level

$120K/yr - $200K/yr

Channel3 is building a database of every product on the internet, leveraging AI to structure messy product data at scale. As a Fullstack Engineer, you will be responsible for developing merchant-facing products, inventing user experiences for agentic commerce, and shaping the developer experience with a focus on fast shipping and quality architecture.

Artificial Intelligence (AI)DatabaseE-CommerceInternetShopping

No H1B

Responsibilities

Build out our merchant-facing product: You’ll own the web app brands and agencies use to see (and eventually control) how they show up across AI shopping surfaces: what products are indexed, what attributes we think are true, where we’re wrong, and what’s driving clicks and sales. You’ll turn messy internal data into a fast, intuitive UI that non-technical teams actually trust and use

Invent the UX of agentic commerce: The industry is still figuring out what the interface for agentic commerce should look like. You will build consumer-grade apps on top of our API to define those patterns and dogfood our own infrastructure

Shape the developer experience: We want using Channel3 to be powerful enough to power entire companies, and simple enough for vibe-coders to use. We take pride in maintaining great documentation (with Mintlify) and easy-to-use SDKs (with Stainless). You’ll work with Evan to meet or exceed a Stripe-level developer experience

Move fast and ship constantly. We bias toward shipping and iterating rather than overthinking. You'll push real code that users interact with every single day. If you have an idea in the morning, you can have it live by afternoon

Own frontend architecture and polish. You’ll build in Python on the backend, and TypeScript + React on the frontend, set the standards for UI quality, performance, and design systems, and make complex workflows feel simple. You’ll care about the last 10%: load time, empty states, and the tiny details that make software feel premium