Senior Mobile Engineer

🔒 Confidential Employer
Posted 21 March 2026
LOCATION
London
TYPE
Full-time
LEVEL
Mid-Senior level
CATEGORY
Technology
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

React Native iOS Android Mobile App Development API Testing Communication SDK

FULL DESCRIPTION

Senior Mobile Engineer

[Employer hidden — view at passion-project.co.uk] is seeking a Senior Mobile Engineer to design and build high-performance, user-friendly mobile experiences. The role involves architecting, developing, and maintaining mobile applications, collaborating with backend teams, and mentoring peers.

About the Role

[Employer hidden] 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 be crafting high-performance, user-friendly experiences, which operate at scale. Your role will extend beyond writing code - you’ll define architecture, lead technical discovery, and help us build the foundations that underpin our consumer offering.

What you’ll be doing

  • Architecting and building the mobile experiences that are used directly by millions of consumers around the world.
  • Owning feature development end-to-end, from discovery through to development, and monitoring through to maintenance.
  • Working closely with backend teams to ensure the underlying systems we build are aligned to support our mobile product evolution.
  • Championing best practices across the technical domain (testing, monitoring, release strategy, etc) to strengthen our foundations as we build our products.
  • Mentoring peers, reviewing code, and contributing to the long-term technical vision for mobile development at [Employer hidden].

Should have

  • 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

  • Previous experience in payments, fintech, or other security-sensitive domains.
  • Exposure to PCI compliance, tokenization, or secure data handling.
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