Growth Engineer

About this role

Ello, an AI-powered educational platform, seeks a Growth Engineer to own end-to-end features that drive user acquisition, engagement, and retention. You'll combine full-stack engineering expertise with data-driven growth strategy, building experimentation frameworks, onboarding flows, and analytics systems that scale impact for millions of learners.

What you'll do

• Design and ship end-to-end growth features from concept through production deployment
• Build A/B testing and experimentation infrastructure to validate growth hypotheses
• Develop onboarding flows, referral programs, and notification systems
• Partner with product, marketing, and data teams to identify high-leverage growth opportunities
• Optimize conversion and retention metrics across the user lifecycle
• Analyze user data to generate insights and inform growth strategy

What they're looking for

• Full-stack development (React/Flutter frontend, Python/Node.js/Go backend)
• A/B testing and experimentation frameworks
• Analytics tools (Amplitude, Mixpanel, Segment, Google Analytics)
• Mobile development (iOS Swift, Android Kotlin, or Flutter)
• Data pipelines and custom metric queries
• Product sense and conversion optimization
• GenAI models and human evaluation infrastructure
• Cross-functional collaboration

Benefits

• Work on AI-powered education with global impact
• Small, mission-driven team with top-tier investor backing
• In-person collaboration in San Francisco (minimum 3 days/week)
• Weekly product shipping and rapid iteration cycles
• Direct testing and feedback with real users

Likely interview questions

• Walk us through a growth feature you built end-to-end—what hypothesis did you test, and what was the impact on user acquisition or retention?
• How do you approach setting up and interpreting A/B tests? Can you describe a time when an experiment result surprised you?