Mobile Tech Lead

0026 Checkout Technology Ltd; Greater London; On-site; GBP 80,000 - 100,000; Full time

Job summary

0026 Checkout Technology Ltd is seeking a Senior Mobile Engineer to lead the development of a new mobile app. You will design and implement the app using React Native, making key architecture decisions to ensure scalability and performance.

The ideal candidate has 8–10 years in mobile engineering and at least 3 years of React Native experience. This is an opportunity to shape the mobile engineering practices and mentor the future team members.

Qualifications

• 8–10+ years in mobile engineering, with at least 3+ years in React Native.
• Solid background in iOS or Android native development.
• Experience building mobile apps with significant active user bases.

Responsibilities

• Lead the design and implementation of the mobile app using React Native.
• Drive key architecture decisions for navigation and performance tuning.
• Mentor future mobile hires and contribute to the hiring process.

Skills

Mobile engineering

React Native

iOS development

Android development

UX

Technical judgment

Communication skills

Job description

Checkout.com is on a mission to transform the shopping experience for millions of consumers. As our most senior individual contributor in mobile, you’ll lead the development of our mobile app from the ground up.

What You’ll Do

• Lead the design and implementation of our first mobile app, with React Native as the preferred approach, while keeping flexibility to evolve the tech stack as the product matures.
• Drive key architecture decisions – navigation, state management, animations, and performance tuning – ensuring scalability and maintainability.
• Act as the guardian of mobile UX and performance: define what should be built in React Native and where native development is the better fit.
• Partner with backend and product teams to deliver seamless, end-to-end user journeys.
• Establish mobile engineering foundations – coding standards, CI/CD pipelines, testing practices, and observability – from the ground up.
• Mentor future mobile hires, scale the team, and actively contribute to the hiring process.

You Should Have

• 8–10+ years in mobile engineering, with at least 3+ years production‑level React Native experience.
• Solid background in iOS or Android native development – confident extending and maintaining native modules when required.
• Proven experience building and maintaining mobile apps with significant active user bases.
• Deep understanding of UX, performance bottlenecks, and platform‑specific edge cases.
• Strong technical judgment with the ability to balance trade‑offs, influence direction, and adapt the stack as needed.
• Excellent communication skills and experience collaborating with product, design, and backend peers.
• Experience in consumer‑first industries, ideally with high‑scale apps (>100K MAUs).

We create the conditions for high performers to thrive – through real ownership, fewer blockers, and work that makes a difference from day one. Here, you’ll move fast, take on meaningful challenges, and be recognized for the impact you deliver.