Senior Software Engineer, Mobile

About the role

Join the Payments team to develop the mobile infrastructure that powers transactions for millions of users across Southeast Asia. You will focus on building secure, high-performance checkout flows and payment methods that define the core Grab experience. In this capacity, you will own the end-to-end delivery of mobile features that directly influence conversion, retention, and trust across a diverse set of markets. The role requires a strong partnership mindset to align engineering solutions with business objectives while maintaining a high standard of technical excellence. You will be responsible for ensuring that payment workflows are robust, secure, and optimized for varying network and device conditions. This position is ideal for an engineer who thrives on solving complex problems that impact large-scale user journeys in a fast-paced environment. You will play a key role in shaping the future of mobile payments by contributing to the foundational systems that enable seamless and reliable transactions.

Key facts

What you'll do

Architect and implement Android features for payment processing with a focus on reliability and security.

Design and maintain scalable mobile solutions that ensure high stability and performance for critical user paths during peak transaction times.

Enhance observability across the mobile stack by integrating logging, metrics, and tracing to enable rapid diagnosis of issues.

Elevate testing standards by developing comprehensive unit, integration, and instrumentation tests to safeguard against regressions.

Partner with backend, design, and product departments to translate business requirements into coherent technical roadmaps and implementation plans.

Conduct thorough code reviews to uphold best practices and contribute to architectural design decisions that affect the broader codebase.

Resolve production incidents with urgency while maintaining operational standards and documenting learnings for long-term improvements.

Utilize data insights and A/B testing results to refine user experience and optimize key business metrics related to payment success and friction reduction.

Champion secure coding principles specific to mobile environments to protect sensitive user and transactional data.

Collaborate with cross-functional stakeholders to prioritize work in a dynamic setting where requirements can be complex and ambiguous.

Invest in modern Android architecture components to ensure the codebase remains modular, testable, and maintainable over time.

Leverage Kotlin coroutines effectively to manage asynchronous operations and improve the responsiveness of payment flows.

Advocate for the adoption of Jetpack libraries to streamline UI development and align with Android best practices.

Support the continuous improvement of the development lifecycle by contributing to tools, scripts, and processes that boost team efficiency.

Requirements

• Possess a minimum of 5 years of professional experience developing Android applications across multiple projects and codebases.
• Demonstrate advanced proficiency in Kotlin, including its type system, coroutines, and modern language features.
• Show a proven track record of successfully shipping and maintaining large-scale consumer mobile features that reach production.
• Exhibit a deep understanding of client-server communication protocols, API integration, and backend-driven workflows.
• Display the ability to manage complex and ambiguous technical requirements while delivering clear solutions under pressure.
• Have hands-on experience with Android architecture components such as ViewModel, LiveData, and Room.
• Be fluent in the use of Coroutines and Jetpack libraries to build responsive and lifecycle-aware user interfaces.
• Apply secure coding principles with an emphasis on mobile security, including data storage, network communication, and authentication flows.
• Bring a background in fintech, payments, authentication, or other high-trust domains where reliability is critical.
• Have substantial experience operating within large-scale consumer technology organizations with mature engineering practices.
• Understand the importance of performance optimization and how to measure it using real-world metrics and profiling tools.
• Be comfortable working in a fast-paced environment where priorities can shift based on business needs and user impact.
• Communicate effectively with both technical and non-technical stakeholders to ensure alignment on goals and trade-offs.
• Take ownership of the full product lifecycle from implementation through monitoring and iterative improvement.

Skills & tools

• Kotlin
• Android Architecture Components
• Jetpack
• Coroutines
• Performance monitoring and instrumentation tools

Practical notes

• Benefits include medical and term life insurance.
• GrabFlex allows for personalized benefit packages.
• Leave policies include parental, birthday, and volunteering time off.
• Access to the Grabber Assistance Programme for personal support.
• FlexWork arrangements offer differentiated working hours.
• Grab is an equal opportunity employer committed to an inclusive workplace.