Senior Data Scientist, Product & Growth

comfy-org; San Francisco (CA); On-site; USD 120,000 - 150,000; Full time

Benefits offered by this job

Company-sponsored medical, dental, and vision coverage

Unlimited PTO

Daily catered lunch and dinner

Choice of equipment

Unlimited budget for AI tools

Job summary

Comfy-org is seeking a dedicated product and growth data scientist in San Francisco. In this hands-on, senior role, you will analyze and own critical metrics in the growth funnel, drive experiments, and collaborate with teams to inform decisions based on data insights.

The role requires several years of experience in data science, proficiency in SQL and Python, and an understanding of experimental design and data modeling. The company offers comprehensive benefits including 100% medical coverage and unlimited PTO.

Qualifications

• Several years in product or growth data science at a product-led company.
• Hands-on with SQL and Python, capable of building models.
• Ability to conduct experiments and discern real effects from noise.

Responsibilities

• Own the metrics defining the growth funnel.
• Design and execute experiments, reading the results honestly.
• Build models for predictions related to growth metrics.

Skills

Product or growth data science experience

SQL programming skills

Python programming skills

Experience with experimentation and A/B testing

Understanding of data models and pipelines

Communication skills

Tools

PostHog

dbt

Job description

The Role

Comfy is looking for our first dedicated product and growth data scientist. Millions of people use ComfyUI, and we're turning that reach into a real business. We need someone who can tell us what's actually happening inside the funnel, find where the leverage is, and prove what moves the numbers.

This is a hands‑on, senior IC role. You'll own the analysis behind signup, activation, conversion, and retention, and you'll work directly with growth, product, and the founders. You won't sit behind a ticket queue. You'll pick the questions that matter, answer them well, and turn the answers into decisions we actually make.

What You'll Do

Own the metrics that define our growth funnel: signup, activation, conversion, retention, and how they connect.

Design and run experiments (A/B tests and beyond), and read them honestly, including when the answer is “no effect.”

Build the models that matter for growth: activation prediction, churn and retention, conversion propensity, and LTV.

Turn messy product and billing events into clean, trusted analysis (we run on PostHog and a warehouse).

Find the leverage: the few places where a small change in the funnel produces an outsized result, and size the opportunity before we build.

Make your work legible with clear metrics, dashboards, and writeups the whole team can act on.

Partner with growth and product day to day, and with the founders on the bets that matter.

You Might Be a Fit If You

Have several years in product or growth data science, ideally at a product‑led or consumer company with real scale.

Are genuinely hands‑on: you write your own SQL and Python, build your own models, and don't need a platform team to get answers.

Know experimentation cold, both the statistics and the judgment, and can tell a real effect from noise.

Think in funnels and systems, and connect a metric to the decision it should drive.

Communicate in plain language, and aren't afraid to deliver an inconvenient finding.

Have built data models or pipelines when the job needed it (dbt, warehouse), even if analysis is your main game.

Care about AI and creative tools, ideally as a ComfyUI user.

Like a small, intense team: high ownership, low ego, fast clock.

Are in SF or ready to be.

Bonus Points

You’ve stood up an experimentation program or an analytics stack from scratch.

You’re comfortable with PostHog, dbt, or similar tools.

You can point to analysis that changed what a company did, not just what it knew.

Benefits

Company‑sponsored Medical, Dental, and Vision (up to 100% coverage), unlimited PTO, daily catered lunch and dinner, your choice of equipment, and an unlimited budget for AI tools.