Hybrid Lead Growth Engineer

at Berry Street

• Job title: Lead Growth Engineer
• Job type: Full Time
• Experience level: Senior
• Salary: $225,000 - $275,000 per year
• Degree requirement: Bachelor's Degree
• Tech skills: JavaScript, Node.js, React, TypeScript
• Location requirements: Hybrid, New York City, United States

About the role

• Lead Growth Engineer building growth experimentation practice for Berry Street's nutrition platform. Architecting AI-powered solutions for rapid testing and optimization in healthcare.

Responsibilities

• Own growth experimentation end-to-end: Grow Berry Street’s patient base by an order of magnitude through growth technology. Lead conversion funnel experiments as the technical owner of Berry Street's growth experimentation practice
• Build self-serve experimentation tools: Create platforms that empower the growth marketing team to launch tests, personalize experiences, and analyze results independently
• Build intelligent systems that unlock personalization: Implement pipelines using LLMs for content personalization and embeddings for semantic targeting as we scale our ability to serve the needs of specific patient cohorts with greater precision
• Deliver exponential, compounding results: Build systems where AI-driven improvements stack — each experiment teaching the system to run better experiments, creating exponential growth in both learning velocity and business impact. Speed to learn is everything

Requirements

• Experience: 6–8 years of full-stack engineering, with at least 3 years in growth engineering.
• Technical Mastery: strong in TypeScript, React, and Node.js – comfortable architecting full growth stacks.
• Data & Experimentation Expertise: deep experience with A/B testing platforms (LaunchDarkly, GrowthBook) and analytics tools (Amplitude, Segment, Mixpanel).
• AI-Native Leadership: fluent in using LLMs and agentic tools (Cursor, Claude Code, OpenAI, etc.) to supercharge experimentation, personalization, and automation.
• Systems Thinker: able to design processes and architecture that make experimentation repeatable, scalable, and safe.
• Cross-Functional Collaborator: proven ability to translate between engineering, marketing, and data teams.
• Bias to Action: pragmatic builder who ships, measures, and iterates rapidly.

Benefits

• This role has the option to be in-person/hybrid in NYC, or fully remote depending on candidate location
• The expected base pay range for this position is $225,000–$275,000, based on qualifications and experience
• Comprehensive health insurance plans, including dental and vision
• Generous PTO 🏖️
• 401k with match 💰
• Citibike membership 🚲
• Unlimited dietitian care 🍓