Senior Mobile SDK Engineer - Lead Level - (iOS/Android)

At Crowd Connected, we’re building the next generation of location intelligence. Our technology powers real-time tracking and insight for mobile apps, helping businesses better understand how people move through physical spaces—whether that’s at a global music festival, inside a smart building, or across a university campus.

We combine advanced indoor positioning, IoT, and machine learning to deliver solutions that are used by some of the world’s best-known brands and events. Our mobile SDKs for iOS and Android are core to what we do, enabling location-aware experiences at scale—with over 10,000 new downloads of apps containing our code every day.

As a growing scale-up, we operate with the agility and flexibility of a startup, backed by a strong foundation of proven products and real-world deployments. We value autonomy, deep technical thinking, and smart, motivated people who want to have a tangible impact.

The Role: Senior Mobile SDK Engineer

As we scale our technology and customer base in 2025 and beyond, we’re looking for an experienced Senior Mobile Engineer to join our team and take ownership of our cross-platform mobile SDKs.

In this role, you’ll be instrumental in evolving our iOS and Android SDKs—built around technologies like CoreLocation, CoreBluetooth, and CoreMotion. You’ll work close to the metal, designing and refining performant, reliable SDK components that integrate seamlessly with our customers’ apps.

This is not a UI-heavy role—it’s for engineers who enjoy solving low-level problems, care deeply about performance and developer experience, and want to help shape a product used in thousands of apps worldwide.

You’ll have the autonomy to contribute meaningfully to architecture decisions, product direction, and the long-term roadmap. You’ll also help support our growing developer community, ensuring that integration is smooth and well-documented.

If you're a technically curious, hands-on mobile engineer who thrives in a focused, self-directed environment and is excited by the opportunity to build technology that’s already making an impact globally—let’s talk.

• Lead our SDK Development: Work across Swift (iOS), Kotlin/Java (Android), and C (core positioning engine) to optimise sensor performance, data handling, and network communication.
• Own iOS Expertise: Be the go-to for all things iOS (and ideally Android) —from early design to delivery. Ensure the SDK is scalable, high-performing, and easy to integrate, always aligned with developer needs and business goals.
• Manage Full SDK Lifecycle: Take responsibility for the entire SDK lifecycle, including design, development, testing, integration, and publishing via Carthage, CocoaPods, Swift Package Manager, and Gradle.
• Ensure Quality & Stability: Apply strong debugging and testing skills to maintain robust, reliable SDKs. Champion testing best practices and take pride in delivering production-ready code.
• Support External Developers: Provide hands-on support to app developers integrating our SDKs, helping resolve issues and ensuring seamless onboarding.
• Maintain Clear Documentation: Write and maintain high-quality developer documentation that makes integration smooth and intuitive.
• Contribute to Roadmap & Strategy: Help shape the future of our SDKs by proposing and prioritising new features and improvements based on developer feedback and technical insight.
• Maintain and Improve Supporting Apps: Update and enhance our suite of demo, admin, and internal test apps as needed—ensuring they reflect the latest SDK capabilities.
• Build New Tools as Needed: Design and develop new mobile apps for testing, demos, or admin use to support SDK development and adoption.

Employer Pension Contribution: 5% as standard, above the required minimum.

Share Options: Available through a discretionary scheme.

Exclusive Discounts: Including great discounted membership at Surrey Sports Park and other neighbouring facilities.

Work-Life Flexibility: Enjoy WFH options and flexible working hours.

Generous Holiday: 28 days annual leave plus bank holidays.

Learning & Development: Investment in your growth and development.