Growth Engineer

Circle Labs; San Francisco (CA); On-site; USD 130,000 - 190,000; Full time

Benefits offered by this job

Competitive pay and equity

Health, dental, and vision coverage

Access to frontier AI Engines

Job summary

Circle Labs in San Francisco is seeking a growth-focused product engineer to help people discover shapes.inc, invite friends, and stay engaged with our social, multiplayer product across iOS, Android, and web.

You will own acquisition, onboarding, activation, referrals, lifecycle, and retention, designing and measuring experiments, building flows, and advancing analytics and AI-driven onboarding. You’ll work across design, engineering, and research to ship impact quickly.

Qualifications

• Three+ years shipping consumer software.
• Confidence working across the stack and SQL to investigate metrics.
• Examples of growth experiments you shipped, including hypothesis, implementation, results, and next steps.
• Comfort with ambiguity, ownership, and rapid iteration.
• Curiosity, willingness to learn, and a collaborative, low-ego approach.

Responsibilities

• Design, ship, and measure growth experiments across the stack.
• Measure activation and retention from invitations and the first shared conversation to reasons they return.
• Build and test invitation, joining, and catch-up flows for groups to reach first useful shared result.
• Develop attribution, event tracking, experimentation, and internal dashboards.
• Use AI for personalized onboarding, landing pages, lifecycle messages, and paid creative.

Skills

Growth experiments

SQL analytics

Consumer software

Cross-stack collaboration

Ownership & initiative

Experimentation mindset

Job description

About Circle Labs

Circle Labs is the company behind shapes.inc, a place to collaborate. We’re building multiplayer AI: shapes are collaborative assistants that take part in group conversations and do things with you and your people. Our next work includes helping groups set shared goals, delegate to specialist shapes and external agents, and follow progress through to completion. Making things, figuring things out, and sharing plans give people more reasons to spend time together.

We’re a small team in San Francisco. We use the product every day, talk to users, and work across design, engineering, and research.

About the role

Help people discover shapes.inc, bring their friends, and keep spending time together. Own acquisition, onboarding, activation, referrals, lifecycle, and retention for a social, multiplayer product across iOS, Android, and web.

What you’ll do

• Design, ship, and measure growth experiments across the stack.
• Measure activation and retention for both people and groups, from invitations and the first shared conversation to the reasons they return together.
• Build and test invitation, joining, and catch-up flows that help a group reach its first useful shared result and continue together.
• Develop attribution, event tracking, experimentation, and internal dashboards.
• Use AI for personalized onboarding, landing pages, lifecycle messages, and paid creative.

What you’ll bring

• At least three years shipping consumer software.
• Confidence working across the stack and writing SQL to investigate metrics.
• Examples of growth experiments you shipped, including the hypothesis, implementation, measured result, and what you changed next.
• Comfort with ambiguity, ownership, and rapid iteration.
• Curiosity, willingness to learn, and a collaborative, low-ego approach.

Nice to have

• Early-stage startup experience, or a consumer app shipped independently to an app store.
• Mobile growth, analytics, or experimentation tools, including attribution and store-listing tests.
• Production AI applications or performance marketing fundamentals: acquisition cost, return on ad spend, payback, and lifetime value relative to acquisition cost.

Benefits

• Competitive pay and equity
• Health, dental, and vision coverage
• Access to frontier AI Engines