Senior Growth Engineer

Ello•San Francisco, CA

3d•$180,000 - $215,000•Hybrid

About The Position

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. 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. We work in-person out of our San Francisco office (minimum 3 days/week), and we’re big believers in face-to-face collaboration.

Requirements

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

Nice To Haves

Experience with building products or features designed for children and parents
Familiar with the range of tools & services available to build a full end-to-end customer solutions
Developed solutions that integrated across third-party systems (e.g. Stripe, Twilio, SendGrid, CRMs, etc.)
Deep understanding of front-end architectures (web & mobile), design patterns, and performance optimization techniques

Responsibilities

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

Benefits

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

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