Senior Android Engineer

WEJOY PTE. LTD.; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

WEJOY PTE. LTD. in Singapore is seeking a senior technical engineer to independently drive development and optimisation of core modules, focusing on high-performance, reliable global products.

You will lead development of game container infrastructure, design complex social features, and shape architecture while mentoring juniors and documenting decisions.

Qualifications

• 3–5 years of commercial Android app development experience.
• Proficient in Java or Kotlin with knowledge of Android internals.
• Ability to design and deliver medium-to-large feature modules independently.
• Experience with performance optimisation, memory management, and multi-threading.

Responsibilities

• Lead the development of the Cocos/Unity game container infrastructure, tackling complex technical challenges such as dynamic delivery and high-performance native bridging.
• Independently design, develop, and iteratively optimise complex social features (e.g., social games, instant messaging, and feed streams), ensuring code quality and maintainability.
• Systematically drive application performance optimisation by leading initiatives on startup speed, memory usage, and package size, and establishing team performance standards.
• Drive the evolution of component-based architecture and build development toolchains to significantly improve team R&D efficiency and quality.
• Lead key technology selection, write technical documentation, mentor junior engineers, and conduct code reviews.

Skills

Java/Kotlin

Android internals

Performance optimization

Memory management

Multithreading

Architecting solutions

Open-source frameworks

Problem diagnosis

Communication

Team collaboration

Education

Bachelor's degree in Computer Science

Tools

Cocos

Unity

Jetpack Compose

Kotlin Coroutines/Flow

Job description

About the Role

As a key technical member of the team, you will independently drive the development and optimisation of core modules, participate in technical decision-making, and help build high-performance, highly available global products.

Job Responsibilities

1. Lead the development of the Cocos/Unity game container infrastructure, tackling complex technical challenges such as dynamic delivery and high-performance native bridging.
2. Independently design, develop, and iteratively optimise complex social features (e.g., social games, instant messaging, and feed streams), ensuring code quality and maintainability.
3. Systematically drive application performance optimisation by leading initiatives on startup speed, memory usage, and package size, and establishing team performance standards.
4. Drive the evolution of component-based architecture and build development toolchains to significantly improve team R&D efficiency and quality.
5. Lead key technology selection, write technical documentation, mentor junior engineers, and conduct code reviews.

Job Requirement:

1. Bachelor's degree or above in Computer Science or a related discipline, with 3–5 years of experience in commercial Android application development.
2. Proficiency in Java or Kotlin, with an in-depth understanding of Android system internals and hands-on experience in performance optimisation, memory management, and multi-threading.
3. Strong capability in architecting complex business solutions, with proven experience in independently designing, developing, and delivering medium-to-large-scale feature modules.
4. Familiarity with the principles of common open-source frameworks, with solid skills in technology selection and problem diagnosis.
5. Strong sense of responsibility, excellent communication and collaboration skills, and a proactive approach to driving project delivery.

Preferred:

1. Hands-on experience in integrating and communicating with game engines such as Cocos or Unity.
2. Experience in developing high-concurrency social games, instant messaging (IM), or audio/video-related projects.
3. Familiarity with modern Android development stacks such as Jetpack Compose and Kotlin Coroutines/Flow.
4. Experience in componentisation, architecture design, or performance-tuning tool development.
5. Experience in globalised application development or large-scale social/gaming projects.
6. Development experience in C/C++ or Rust.