Senior Mobile Engineer

0026 Checkout Technology Ltd; Greater London; Hybrid; GBP 65,000 - 85,000; Full time

Job summary

0026 Checkout Technology Ltd is seeking a Senior Mobile Developer to transform the shopping experience for millions. You will architect mobile solutions, collaborating with cross-functional teams to ensure high-quality, scalable products.

The ideal candidate has a solid background in React Native and mobile development on iOS and Android. Enjoy a hybrid working model with three days per week in the office. Join us to shape the future of mobile technology!

Qualifications

• Solid background in React Native and building consumer experiences.
• Proven track record in mobile development across iOS and Android.
• Experience maintaining mobile apps or SDKs for large users.

Responsibilities

• Architect and build mobile experiences for millions of consumers.
• Own end-to-end feature development, from discovery to maintenance.
• Collaborate with backend teams to support mobile product evolution.

Skills

React Native

iOS Development

Android Development

API Design

Mobile App Development

Job description

About the Role

Checkout.com is on a mission to transform the shopping experience for millions of consumers. As a senior individual contributor in mobile, you’ll help design and build the products we put in the hands of our end users. Working hand‑in‑hand with our engineering team and product leaders, you’ll craft high‑performance, user‑friendly experiences that operate at scale.

Your role will extend beyond writing code – you’ll define architecture, lead technical discovery, and help build the foundations that underpin our consumer offering.

Responsibilities

• Architect and build mobile experiences used directly by millions of consumers worldwide.
• Own feature development end‑to‑end, from discovery through to development and ongoing maintenance.
• Collaborate closely with backend teams to ensure underlying systems support mobile product evolution.
• Champion best practices across the technical domain (testing, monitoring, release strategy, etc.) to strengthen our foundations.
• Mentor peers, review code, and contribute to the long‑term technical vision for mobile development.

Qualifications

• Solid background in React Native, building scalable and highly performant consumer experiences.
• Proven track record building across the mobile domain (e.g., experience with native iOS and Android).
• Experience building and maintaining mobile apps or SDKs used by a large, active user base.
• Passionate about developer experience – clear APIs, great docs, and reliability at scale.
• Excellent communication skills and experience collaborating with product, design, and backend peers.

Nice to Have

• Experience in payments, fintech, or other security‑sensitive domains.
• Exposure to PCI compliance, tokenization, or secure data handling.

Work Environment

Our hybrid working model offers flexibility, with three days per week in the office to support collaboration and connection.