Lead Software Engineer, Mobile (iOS)

About the role

Grab is Southeast Asia's leading superapp, and this role sits within the Consumer Experience Pax App Core team, which owns the architecture, build times, CI/CD and developer tooling behind one of the largest mobile codebases in Southeast Asia. As a technical leader reporting to the Mobile Engineering Manager, you will shape the architecture, infrastructure and AI foundations that help engineers build the Super App faster and more safely, and you will define coding principles and technical standards.

Key responsibilities

• Lead the technical direction of the PAX iOS app, including architecture, modularisation and coding principles that let engineers and AI agents extend the app safely.
• Design and develop reliable, measurable AI primitives such as context, tooling, guardrails and evaluation for mobile development at scale.
• Improve adoption across feature teams through RFCs, migration plans, guidelines and enablement, with accountability for sustainable outcomes.
• Collaborate with design platform, mobile platform and cross-functional stakeholders to align technical strategy and resolve complex business, legal and product needs.
• Strengthen engineering quality through risk management, on-call and incident response, code and design reviews, mentorship, knowledge sharing and continuous improvement.
• Mentor and coach colleagues, delegate effectively, and help raise the team's bar through strong processes, standards and hiring decisions.

Required profile

• 7+ years of software engineering experience, including at least 5 years of iOS development in large, long-lived codebases.
• Strong command of AI fundamentals for software engineering, including context engineering, tool use, function calling, agentic workflows, retrieval, evaluation and common failure modes.
• Hands-on experience building, deploying, measuring and safeguarding LLM-powered tools or product capabilities.
• Experience guiding architectural approaches such as MVVM or VIPER, and understanding of large-scale application operations, crash analytics, remote debugging, observability and phased rollouts.
• Experience creating detailed technical documentation and mentoring engineers and improving team processes and standards.

Required skills

• Swift and Objective-C
• AI fundamentals and LLM-powered tools
• iOS architecture patterns (MVVM, VIPER)

What we offer

• Term Life Insurance and comprehensive medical insurance
• GrabFlex benefits package
• Parental and birthday leave, plus volunteering leave
• Confidential assistance programme
• FlexWork arrangements such as differentiated hours