Senior Mobile Engineer (iOS Swift & Android Kotlin)

About the role

Lorgarithm is looking for five experienced mobile engineers to build and maintain high-performance mobile applications with strong cross-platform functionality and user experience. Candidates can apply if they are proficient in only one stack: iOS/Swift or Android/Kotlin. The position is based in Lagos with a hybrid setup (2 days in the office, 3 days remote).

Key responsibilities

• Develop iOS apps with Swift and Android apps with Kotlin, implementing custom UI components and animations.
• Integrate RESTful APIs, WebSocket connections and other backend services with backend engineers.
• Work with the iOS and Android teams to ensure feature parity, share reusable code and follow platform guidelines.
• Develop algorithms and data structures to optimise performance, data processing, network communication and UI rendering.
• Monitor app performance with Xcode Instruments and Android Profiler, fixing bottlenecks, memory leaks and improving battery efficiency.
• Write unit, integration and UI tests, take part in code reviews and collaborate with QA engineers.
• Set up and maintain CI/CD pipelines and coordinate with DevOps for App Store and Google Play deployment.
• Collaborate with product managers and designers, take part in agile ceremonies and mentor junior engineers.

Required profile

• Minimum 5 years of experience in iOS development with Swift and 5 years in Android development with Kotlin.
• Proven experience in algorithm development and problem solving for mobile apps.
• Strong understanding of mobile architecture and design patterns.
• Experience integrating backend services such as RESTful APIs, WebSocket connections and push notifications.
• Preferred: cross-platform frameworks (Flutter or React Native), Firebase or AWS Mobile Hub, and knowledge of accessibility standards.

Required skills

• Swift and Kotlin
• Xcode and Android Studio
• CI/CD pipelines and automated testing
• Mobile security basics (encryption, secure communication, authentication)
• Agile working style and strong communication

What we offer

• Compensation of N#600,000 to N#1,000,000 depending on experience.
• Hybrid work: 2 days in Lagos office, 3 days remote.