Lead Mobile Engineer

Collinson Group; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Collinson Group in London is seeking a Mobile Squad Lead Engineer to drive native Android and iOS development for a squad of 5–7 engineers. You will lead technically, write code daily and set high standards for mobile engineering.

As a hands-on leader, you will refine architecture, mentor engineers, own CI/CD and app store releases, and collaborate with backend teams to deliver robust mobile experiences across cloud services.

Qualifications

• 7+ years of professional software engineering experience focused on mobile.
• Native Android and iOS development expertise.
• Experience as Lead/Tech Lead or senior mobile engineer.
• Experience integrating AI-assisted development tools.
• Experience with REST APIs and GraphQL and cloud services.
• Proven testing and automation experience.
• Experience owning mobile CI/CD and app releases.

Responsibilities

• Lead the design and development of native Android and iOS applications, scalable and well-architected.
• Provide technical leadership on mobile architecture and best practices.
• Remain hands-on, writing and reviewing mobile code.
• Collaborate with backend engineers to design and consume APIs.
• Mentor and coach mobile engineers to grow.
• Own mobile build, release, and deployment processes including CI/CD and app store submissions.
• Champion automated testing and observability; improve app reliability.

Skills

Mobile development

Android

iOS

Lead Engineer

AI-assisted dev

REST APIs

GraphQL

CI/CD

Mentoring

Observability

Git

Jira

Confluence

Tools

Cloud platforms

Job description

Job Description

The Role

As a Mobile Squad Lead Engineer, you will be the technical backbone of your mobile squad (around 5–7 engineers), leading from the front, writing code daily and setting the standard for high-quality mobile engineering across Android and iOS.

You will work closely with an Engineering Manager to ensure your squad delivers scalable, well-architected mobile applications, while partnering with a Product Manager and UX team to build and ship mobile-first features and experiences.

This is a hands-on role with a strong focus on mobile architecture, coding and problem-solving. You will be the most experienced mobile engineer in the squad, responsible for refining technical requirements, making key platform decisions and mentoring engineers to help them grow.

Using modern mobile technologies and architectures, you will build and evolve native Android and iOS applications, integrating seamlessly with backend services and cloud platforms. If you enjoy building polished mobile products, solving complex platform challenges and shaping the technical direction of a mobile team, this role gives you the autonomy, responsibility and impact to do so.

Key Responsibilities

• Lead the design and development of native Android and iOS applications, ensuring they are scalable, performant, secure and well-architected.
• Provide technical leadership to the squad, guiding decisions on mobile architecture, frameworks, libraries, and best practices in code quality, performance, accessibility and security.
• Remain highly hands-on, spending most of the time writing and reviewing mobile code, and ensuring high-quality, maintainable applications.
• Collaborate closely with backend engineers to design and consume APIs that support robust and efficient mobile experiences.
• Mentor and coach mobile engineers, fostering a culture of continuous learning, strong ownership and technical excellence.
• Own mobile build, release and deployment processes, including CI/CD pipelines and app store submissions for Google Play and Apple App Store.
• Champion automated testing, app stability, observability, and the responsible use of AI to improve developer productivity and software quality.

Knowledge, Skills and Behaviours

Essential

• 7+ years of professional software engineering experience, with a strong focus on mobile application development.
• Strong experience building native Android and native iOS applications, with a deep understanding of modern mobile architectures and best practices.
• Previous experience as a Lead Engineer, Tech Lead or Senior Mobile Engineer leading a small team.
• Proven experience integrating AI-assisted development tools and techniques into everyday workflows (e.g. code generation, testing, debugging, performance analysis or automation).
• Hands-on experience integrating mobile apps with backend APIs (REST and/or GraphQL) and cloud-based services.
• Strong focus on testing and quality, with experience using mobile testing frameworks and automated testing approaches.
• Experience owning mobile CI/CD pipelines, build automation and app store release processes.
• An observability mindset, with experience using crash reporting, performance monitoring and analytics tools to improve app reliability.
• Comfortable working with Git, Jira, Confluence and modern agile engineering workflows.
• Proven ability to mentor engineers, review code and designs, and balance pragmatism with mobile engineering excellence.

Reward & Benefits: What's in it for me?

We want our people to feel recognised, supported and able to thrive both at work and beyond it.

We offer a competitive reward package designed to support your financial, physical and mental wellbeing, alongside opportunities to learn, develop and be recognised for the contribution you make. Benefits vary by role and location, and full details will be shared as part of the application process.

Equal opportunities: Our commitment to inclusion

Collinson Group is an equal opportunities employer. We welcome applications from people of all backgrounds, identities and experiences, and believe that different perspectives make our business stronger.