Software Engineer

Hazel; New York (NY); Hybrid; USD 150,000 - 250,000; Full time

Benefits offered by this job

Base salary 150-250K

Equity 0.15-0.5%

Top-tier health, dental, vision

Hybrid in NYC

Job summary

Hazel, the AI coworker for consumer brands, is seeking a Senior Software Engineer to extend the action layer and write back into connected systems like Shopify and Klaviyo. You will build full‑stack features with TypeScript/React + Go and craft AI agent workflows, enabling safe, automated operations.

This hybrid role is based in NYC and involves collaboration with founders and customers. You will contribute to integrations across major platforms, improve UX, and ship reliable software used by

Qualifications

• Shipped a production LLM feature to real users.
• Owned an API at scale: query optimization, schema design.
• Strong TypeScript experience.
• Uses coding agents to do the work of a larger team and can explain where they helped or hindered.
• Cares about product ergonomics and UX.
• Former or aspiring founders.

Responsibilities

• Extend Hazel's action layer - writes back into connected systems.
• Develop full-stack features across TypeScript/React + Go services.
• Design and implement AI agent workflows: streaming LLM responses, multi-step tool use, approvals.
• Build integrations reading and writing across Shopify, Klaviyo, Meta, Amazon, and more.
• Collaborate with founders and customers; ship code used by operators tomorrow.

Skills

TypeScript

API at scale

Code agents

LLM features

UX

Tools

Go

Job description

About Hazel

Hazel is the AI coworker for consumer brands. We connect to a brand's live data - Shopify, Klaviyo, Amazon, Meta, and dozens of others - and turn it into a teammate operators talk to every day. Ask "why did repeat purchase rate drop last week?" and 10 seconds later you get an answer, cited from live data.

Hazel also takes action herself, proactively flagging issues and making changes directly in Shopify and the other systems she connects to, on the way to running full playbooks autonomously.

We've raised more than $2M, are rapidly scaling, and serve some of the biggest consumer brands including Bogg Bag, Ultra, and OneSkin. You'll join a small, senior engineering team working directly with the founders.

What you'll work on

In your first 60 days, you'll be extending Hazel's action layer - the writes back into the systems she connects to. Think: creating product bundles in Shopify, launching A/B tests in Klaviyo, and the human-in-the-loop scaffolding that makes all of it safe.

Beyond that:

• Full-stack product features across TypeScript/React + Go services

• AI agent workflows: streaming LLM responses, multi-step tool use, approvals

• Integrations across Shopify, Klaviyo, Meta, Amazon, and more, both reading and writing

you'll work directly with the founders and customers. Code you ship today is in front of operators tomorrow.

Who we're looking for

• You've shipped a production LLM feature to real users.

• You've owned an API at scale: query optimization, schema design, picking the right tool for the workload.

• Strong TypeScript experience

• You use coding agents to do the work of a much larger team, and you can tell us where they helped and where they made things worse.

• You care deeply about how the product ergonomics and UX.

• Former or aspiring founders

This isn’t for you if…

• You want product specs handed to you. Your manager is the customer.

• You're low agency

• You aren't excited about

Comp & benefits

• $150-250K base

• 0.15-0.5% equity

• Top-tier health, dental, vision

• Hybrid in NYC (ask about our pool table)

How we hire

1. 15-min intro

2. Founder call

3. Technical interview

4. Onsite - meet the team

5. Offer