Product Engineer

The role

You will build complete user experiences for Ello's AI tutoring app, across the Flutter app, the backend, and the AI systems behind it. You will take a project from idea to a release that kids play with, working with learning designers, ML engineers and a PM.

What you will do

• Own projects and features end to end, from concept to playtest to release
• Build full-stack user experiences across the Flutter app, backend services and APIs, and AI systems
• Bring Ello's characters and learning activities to life, including AI behavior and interaction details
• Partner with learning designers, activity creators, artists, and PMs on scope and progress
• Build backend and AI layers: Python services and APIs, LLM prompts and agent behavior, speech and language model integrations
• Test directly with kids, read the data on what you shipped, and iterate

Required qualifications

• Production experience shipping full-stack products, including a mobile frontend and the backend services and APIs behind it
• Excellence in at least two of: engineering, product craft, product judgment, and solid in the third
• Track record of shipping products end to end with little direction
• Very high attention to detail and product craft
• Judgment to balance speed with quality and ship partial solutions when fastest
• Ability to get up to speed quickly on unfamiliar code and make technical decisions with incomplete information
• Clear, proactive communication with non-engineering partners
• Hands-on backend experience (Python, APIs, data models)
• Experience integrating LLMs or other AI services into production features
• Comfort owning CI and release workflows
• Use of AI coding tools as a core part of how you build

Nice to have

• Experience building products for children or for learning
• Experience with animation and interactive motion in production apps (Rive, Lottie, or similar)
• Deeper experience with GenAI systems: speech pipelines, agent orchestration, or evals
• Experience as a product manager or founder, or a design background
• Experience with mobile performance and scaling across devices and screen sizes

Before you apply

• Questions about immigration can be sent to recruiting@ello.com
• Accommodations during the interview process can be requested from recruiting@ello.com

About the company

Ello is a public benefit corporation with about 50 people, headquartered in San Francisco with a second office in Nairobi, Kenya. Its mission is to maximize the potential of all children through an AI teacher.