We are looking for an experienced Kotlin & Swift Developer with strong computer vision experience to design, build, and maintain a high-performance Software Development Kit (SDK) used in security-critical mobile applications.
This role sits at the intersection of mobile engineering, applied computer vision, and SDK architecture, and will play a key role in delivering reusable, secure, and developer-friendly components used by third-party teams and partners.
Key Responsibilities
SDK Design & Development
• Design and develop a cross-platform mobile SDK (iOS & Android) using Swift and Kotlin
• Create clean, modular, well-documented SDK APIs for external developers
• Ensure the SDK is easy to integrate, versioned correctly, and backward compatible
• Own the full SDK lifecycle: design, development, testing, packaging, and release
Computer Vision & Biometrics
• Implement and optimise computer vision pipelines on mobile devices
• Work with camera frameworks, image processing, and real-time analysis
• Integrate vision-based features such as:
• Face detection / liveness detection
• Image validation and anti-spoofing
• Multi-signal identity verification (where applicable)
• Optimise performance for low latency, low power usage, and on-device processing
Mobile Platform Engineering
• Develop native Android components in Kotlin
• Develop native iOS components in Swift
• Work closely with OS-level APIs (CameraX, AVFoundation, CoreML, Vision, etc.)
• Ensure high performance across a wide range of devices
Security, Quality & Performance
• Apply secure coding practices suitable for identity, authentication, or trust-based systems
• Write comprehensive unit, integration, and performance tests
• Profile and optimise memory usage, CPU/GPU usage, and battery impact
• Support internal and external developers during SDK integration
Collaboration & Documentation
• Collaborate with product, security, and backend teams
• Produce clear SDK documentation, sample apps, and integration guides
• Contribute to technical design discussions and architectural decisions
Required Skills & Experience
Core Technical Skills
• Strong commercial experience with Kotlin (Android) and Swift (iOS)
• Proven experience building and maintaining SDKs or developer platforms
• Hands-on experience with computer vision on mobile
• Deep understanding of mobile performance constraints
Computer Vision Experience
• Experience with mobile CV frameworks such as:
• Apple Vision / CoreML
• OpenCV (mobile)
• Custom ML or image processing pipelines
• Experience working with real-time camera input
• Understanding of lighting conditions, motion, spoofing, and edge cases
• Experience in using Tensaflow
Software Engineering
• Strong knowledge of software architecture and API design
• Experience with CI/CD for mobile libraries
• Versioning, semantic releases, and dependency management
• Comfortable working in high-assurance or security-focused environments
Nice to Have
• Experience with biometrics, identity verification, or liveness detection
• Experience writing SDKs consumed by external customers or partners
• Familiarity with cryptography, secure enclaves, or trusted execution
• Experience with cross-platform SDK strategies
• Background in regulated industries (finance, legal, insurance, defence, healthcare)
What Success Looks Like
• A robust, secure, and performant SDK that external developers enjoy using
• Vision features that work reliably across devices and environments
• Clear documentation that reduces integration friction
• SDK releases that are predictable, stable, and well-supported
Ideal Seniority
• Senior or Lead level
• Comfortable owning complex technical problems end-to-end
• Able to balance performance, usability, and security trade-offs
