Senior Product Engineer, Ello

• You are an engineer with a business mindset who enjoys finding leverage through code, loves rapidly iterating based on data, and thrives optimizing funnels and scaling user impact
• You are comfortable working full-stack and across multiple programming environments
• You have experience building growth features like A/B testing systems, referral programs, onboarding flows, and notifications
• You’re highly curious and metrics-driven, with a strong bias toward experimentation and execution
• We welcome candidates from all backgrounds – frontend, backend, growth product – but we prioritize strong technical foundations and proven impact on user or revenue growth
• You’ve launched and scaled successful growth initiatives, either at a high-growth startup or as part of a dedicated growth team at a larger company
• Strong experience with growth-focused features (e.g. onboarding flows, developing in-app features, emails/notifications, referral loops)
• Experience with at least one of: Flutter, React (or equivalent web framework), native Android development in Java/Kotlin, or iOS development in Swift/ObjC
• Leveraged GenAI tools to accelerate your work impact
• Familiarity with GenAI models & pipelines, including human eval infrastructure
• Experience with A/B testing infrastructure and analytics tools (e.g. Amplitude,
• Mixpanel, Segment, Google Analytics)
• Familiarity with data pipelines, ETL, and writing custom metrics queries
• Proficient with modern frontend frameworks (React, Flutter) and backend systems (Python, Node.js, Go, or equivalent)
• Ability to set up and interpret product metrics, dashboards, and cohort analyses
• Demonstrated experience owning and scaling impactful growth experiments
• Strong product sense and intuition for user experience and conversion optimization
• Experience working with marketing teams and customer acquisition funnels
• Cross-functional mindset: comfortable collaborating across product, design,
• Marketing, and engineering
• Familiarity with agile development methodologies and collaborative development tools
• Have a desire to build & innovate
• Have something to teach us
• Want to do work they are proud of, and ship products they are proud of
• Have an urge to make a real impact on child development at scale
• Take initiative and full ownership of their work
• Prefer open and direct communication grounded in empathy to beating around the bush
• Exemplify integrity in their actions, decisions, and communication
• Want to build meaningful relationships at work

Desirable

• We’re looking for a strong Senior Growth Engineer to independently own end-to-end features to improve user acquisition, engagement, and retention for Ello
• You will bridge the gap between engineering, product, and marketing to test and implement data-driven growth strategies
• You’ll be part of a small and nimble team responsible for the full growth stack, from designing user-facing flows & prototype experiences to developing backend pipelines, experimentation frameworks, and analytics tooling
• Build and own growth features end-to-end, from ideation to deployment
• Develop A/B testing and experimentation frameworks to validate growth hypotheses
• Collaborate with product, marketing, and data to identify high-leverage growth opportunities
• Improve conversion, retention, and engagement across the user lifecycle
• Build and iterate on onboarding, referral, and notification systems
• Analyze user data to generate actionable insights and inform strategy
• Dive deep into the rapidly evolving world of AI and interactive learning
• Experience the joy of turning your designs and code into engaging and educational experiences for children worldwide
• Be part of an A+ team and an engineering culture of excellence