IOS Engineer(Flutter)

CAVATER SDN BHD; Kuala Lumpur; Híbrido; MYR 180.000 - 240.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Hybrid work model

Hybrid or on-site flexibility

Descripción de la vacante

CAVATER SDN BHD is seeking a senior mobile performance engineer to enhance a Flutter + native iOS/Android hybrid app. You will tackle startup time, frame rates, memory footprint, and energy consumption across legacy devices, working across the shared Flutter layer and native iOS components.

You will diagnose main thread blocks, optimize rendering pipelines, and coordinate with Android/QA teams to drive measurable performance gains.

Formación

• 5+ years of mobile development experience with native iOS and Flutter performance optimization.
• Strong knowledge of ARC, RunLoop, GCD, and rendering pipelines.
• Experience diagnosing main thread blocking, memory leaks, and crashes on legacy devices.

Responsabilidades

• Lead performance optimization for Flutter & iOS hybrid app, improving startup time and frame rates.
• Diagnose and resolve main thread blocking, memory leaks, and crashes with focus on UX on legacy devices.
• Optimize Flutter widget rendering, decoding/cache, and long lists to reduce jank.
• Streamline Flutter-native iOS interop, platform views, and 3rd-party SDK integrations.
• Establish production performance metrics and regression testing on real devices.
• Collaborate with Android, QA, and product engineering teams to reduce regression risks.

Conocimientos

Mobile development

Flutter

Swift/Obj-C

Performance optimization

Profiling tools

Herramientas

Xcode Instruments

Flutter DevTools

Memory Graph

Descripción del empleo

We operate a mature mobile application targeting global markets, built primarily on a Flutter + native iOS/Android hybrid architecture.

Our current technical focus is continuously enhancing application performance and stability, with a strong emphasis on delivering a smooth experience on older, low-memory iPhones under complex usage scenarios. In this role, you will work across both the shared Flutter layer and the native iOS layer to tackle real-world challenges related to UI jank, memory footprint, startup time, battery consumption, and hybrid architecture interactions.

Key Responsibilities

Performance Governance: Lead performance optimization for our Flutter & iOS hybrid app, continuously improving startup time, frame rates, memory efficiency, energy consumption, and overall stability.

Deep Troubleshooting: Diagnose and resolve main thread blocking, frame drops, memory leaks, abnormal memory growth, system memory terminations (Jetsam), and crashes, prioritizing UX improvements for legacy devices.

Flutter Rendering Optimization: Optimize Flutter widget building, layout, and rendering pipelines—resolving issues caused by unnecessary rebuilds, image decoding/caching, long scrollable lists, animations, and asynchronous tasks.

Hybrid Integration & Interop: Streamline integration between Flutter and native iOS pages, Platform Views, platform channel communications, and 3rd-party SDKs, addressing thread scheduling, object retention, and resource cleanup.

Metrics & Regression Control: Establish production performance metrics, device/OS version stratified analysis, and regression testing mechanisms, validating optimization gains on physical devices.

Cross-Functional Collaboration: Partner with Android, QA, and product engineering teams to drive shared Flutter layer optimizations, manage platform-specific differences, and lower performance regression risks.

Key Requirements

Experience: 5+ years of mobile development experience with a strong foundation in native iOS, alongside hands-on production experience with Flutter development and performance optimization.

Core Tech Stack: Proficient in Swift/Objective-C and Dart, with a deep understanding of ARC, RunLoop, GCD, thread synchronization, rendering pipelines, and the iOS application lifecycle.

Flutter Internal Mechanics: Solid grasp of the Widget, Element, and RenderObject hierarchy, UI/Raster threads, Event Loops, Isolates, and Platform Channel mechanics.

Profiling & Diagnostics: Proficient with Xcode Instruments (Time Profiler, Allocations, Leaks), Xcode Memory Graph, and Flutter DevTools for precise performance bottleneck identification.

iOS System Architecture: Deep understanding of iOS memory pressure, background execution, and system termination mechanisms, with the ability to combine device logs and production telemetry for root‑cause analysis.

Track Record: Proven history of successful production performance optimizations, with the ability to clearly articulate problem contexts, diagnostic processes, implemented solutions, quantified gains, and regression validation protocols.

Cross-Layer Debugging: Strong capability to determine whether bottlenecks originate from Dart, Flutter rendering, native iOS modules, 3rd-party SDKs, or OS resource limits.

Execution & Ownership: Ability to independently drive optimization initiatives in a mature codebase while balancing technical ROI, compatibility, and release risks.

Preferred Qualifications (Nice to Have)

Experience with performance governance for legacy iPhone models, low-memory devices, and multi-version iOS environments.

Hands-on optimization experience in high-demand scenarios such as audio/video, real-time communication (RTC), complex animations, or high-frequency image rendering.

Familiarity with C/C++, Flutter Engine internals, Impeller, Metal, or graphics rendering technologies.

Experience with MetricKit, APM/production jank monitoring systems, performance metrics frameworks, or automated performance testing pipelines.

Remarks: This role is currently on a hybrid arrangement. However, employees may be required to return to the office on a full on-site basis in the future, subject to company policy.

Ola Chat is a global Internet Technology company that focuses on mobile applications. We are dedicated to making life easier by connecting people in meaningful ways and are constantly pushing the boundaries of how tech can be more “human” through our many exciting products.

Founded in 2019 in Singapore, we have since expanded our reach to Malaysia, Indonesia, Thailand, Vietnam, Egypt, and beyond.

Ola Chat is one of the fastest-growing companies in the world, and our global footprint and years of commercialization experience have contributed to our status as an industry leader.

Ola Chat is a global Internet Technology company that focuses on mobile applications. We are dedicated to making life easier by connecting people in meaningful ways and are constantly pushing the boundaries of how tech can be more “human” through our many exciting products.

Founded in 2019 in Singapore, we have since expanded our reach to Malaysia, Indonesia, Thailand, Vietnam, Egypt, and beyond.

Ola Chat is one of the fastest-growing companies in the world, and our global footprint and years of commercialization experience have contributed to our status as an industry leader.

Ola Chat is a global Internet Technology company that focuses on mobile applications. We are dedicated to making life easier by connecting people in meaningful ways and are constantly pushing the boundaries of how tech can be more “human” through our many exciting products.

Founded in 2019 in Singapore, we have since expanded our reach to Malaysia, Indonesia, Thailand, Vietnam, Egypt, and beyond.

Ola Chat is one of the fastest-growing companies in the world, and our global footprint and years of commercialization experience have contributed to our status as an industry leader.