Lead React Native Engineer

Berry Street is on a mission to transform how Americans eat through nutrition therapy. Our platform connects individuals needing evidence-based nutrition care with an expansive network of Registered Dietitians and AI-powered tools. From weight management, diabetes, and heart health to kidney disease, maternal health, and 25+ other conditions, Berry Street’s clinical team delivers personalized nutrition interventions tailored to each patient's unique physiological and psychological needs — improving outcomes and reducing total cost of care.

We partner with some of the largest health plans, leading health systems, and innovative care management companies to serve diverse populations across all 50 states. Since launching in January 2023, Berry Street has grown to over 1,400 providers on our platform and served tens of thousands of patients nationwide. We’re a Series B company backed by leading investors including Northzone, Sofina, and FJ Labs, along with notable angel investors such as the founders of Revolut, Spring, Grow Therapy, and Tilly. Visit berrystreet.co to learn more.

Why Join Us

We’re a small, fast-moving team with a big mission. This role is demanding — it requires focus, urgency, and ownership — but it’s also highly rewarding. You’ll see the direct impact of your work every day, grow quickly, and play a key role in shaping the future of healthcare. If you thrive in ambiguity, care about solving real problems (not just playing with tech), are product and customer-obsessed, and want to build something meaningful and lasting, you’ll fit right in.

The Role

We’re looking for a Lead React Native Engineer to own our mobile product development and lead the technical direction of Berry Street’s patient-facing mobile apps. This is a hands-on role — you’ll spend the majority of your time building, shipping, and improving high-quality mobile experiences. As our mobile lead, you will partner closely with our product and design teams to define the roadmap, architect scalable solutions, and ensure a smooth app release lifecycle across iOS and Android. This is not a people management role. We’re looking for a senior IC who codes deeply, thinks holistically, and leads by example.

What You'll Do

• Build AI-powered patient experiences: Create intelligent tools that keep patients engaged between visits — using agentic systems to personalize support, automate follow-up, and extend care beyond the video session
• Instrument for insight: Build feedback loops into every layer of the app — analytics, telemetry, and A/B testing hooks that let us learn from every tap and session to better inform our product feature roadmap
• Design for adaptability: Architect a modular app foundation that supports rapid iteration on new care models, engagement flows, and AI-driven personalization to better serve the needs of our patients and providers
• Champion mobile craft: Create internal playbooks, tooling, and shared knowledge that make Berry Street’s mobile engineering practice faster, more consistent, and easier to work with. You are obsessed with creating a system for engineering excellence

Requirements

• Experience: 5–7 years building and scaling mobile applications, with deep experience in React Native.
• Technical Mastery: Strong in React, TypeScript, and mobile-specific concerns (navigation, performance, native modules).
• Full-Stack Awareness: Proficient in API design, database architecture, and integrating with backend systems (REST/GraphQL, PostgreSQL).
• App Release Lifecycle Expertise: Hands-on experience managing App Store and Google Play deployments, versioning, and over-the-air updates.
• Best Practices Advocate: Deep understanding of mobile development lifecycle, testing, analytics, and continuous delivery.
• Product Thinker: Writes code with empathy for end users and appreciation for clinical, operational, and patient contexts.
• Team Player: Energizes the team through collaboration, humility, and a focus on outcomes.

Bonus Points For:

• Experience with Expo, Fastlane, or native module integration.
• Familiarity with Nest.js and AWS.
• Prior work in healthtech or other regulated domains.
• Curiosity about AI/LLMs and how they accelerate development and user experience.

Our Tech Stack

• React Native, Expo
• PostgreSQL, AWS
• GraphQL, REST
• Agentic coding frameworks such as Cursor & Claude Code

Interview Process

1. Initial Screen → Conversation with People & Talent to align on background and mission fit
2. Virtual Assessments → Technical + non-technical problem-solving with the engineering team
3. Onsite Final Round → In-person sessions with leadership and members of the team
4. References + Offer → Our favorite part: welcoming you to Berry Street 🎉

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 🍓