Principal Product Engineer, React Native

Overview

As Principal Product Engineer, you own the mobile/product experience end-to-end for our customer apps. You’ll shape a world-class iOS/Android/web experience using React Native and Expo while integrating AI-driven patterns to accelerate delivery features. You’ll lead architectural direction, mentor engineers, and ensure fast, reliable performance in a fast-paced, AI-first environment. This role blends hands-on delivery with strategic influence to deliver customer-centric outcomes at scale. You’ll work cross-functionally to advance Zapp’s mission of instant, convenient delivery.

Pay / Benefits

• base salary 135,000 – 175,000
• Equity package
• Zapp Credit for testing service
• 25 days holiday + bank holidays
• Private health insurance
• Extended sick pay and parental leave(uint) Cycle to work scheme

Responsibilities

• Own end-to-end mobile feature delivery from design to production
• Develop iOS/Android/web experiences using React Native and Expo
• Lead architectural direction and establish mobile patterns and standards
• Introduce and propagate AI-driven patterns in product development
• Profile performance, harden release processes, and maintain production health
• On-call ownership and accountability for shipped features
• Collaborate with backend, data, and design teams to deliver cohesive experiences
• Mentor engineers and lift the capabilities of the team

Key requirements

• 10+ years of production software experience across mobile, backend, frontend, or full-stack
• Deep React Native and Expo experience with iOS/Android, B2C apps
• Strong TypeScript proficiency
• Proactive AI usage in daily work and ability to propagate learnings
• Product-minded with focus on customer impact and outcomes
• Strong communication and collaboration skills
• Comfort with ambiguity and driving initiatives end-to-end
• Experience with automated testing and delivering reliable software
• Ability to lead and influence across teams and mentor others
• Willingness to work in London location on-site 3 days/week

• excellent communication
• ownership mindset
• growth mindset
• React Native
• Expo
• TypeScript

…