Lead Software Engineer, Mobile (iOS)

Grab; Singapore; On-site; SGD 180,000 - 320,000; Full time

Benefits offered by this job

Term Life Insurance

Medical Insurance

GrabFlex benefits

Parental leave

Birthday leave

LASA volunteering leave

Grabber Assistance Programme

FlexWork hours

Job summary

Grab is seeking a technical leader for the PAX iOS app, responsible for defining architecture, standards, and AI foundations to accelerate development safely at scale. You will mentor engineers, set coding principles, and partner with stakeholders from ideation through rollout.

The role emphasizes strong AI fundamentals, a deep iOS background, and a track record of delivering scalable mobile platforms with robust observability and deployment practices.

Qualifications

• 7+ years of software engineering experience with at least 5 years in iOS development.
• Strong command of AI fundamentals for software engineering, including context engineering and tool use.
• Experience with architectural patterns such as MVVM or VIPER.
• Hands-on experience building and safeguarding AI-enabled tools or features.
• Experience mentoring engineers and improving team processes and standards.

Responsibilities

• Lead the technical direction of the PAX iOS app, including architecture and coding principles.
• Design and develop reliable AI primitives for mobile development at scale.
• Improve adoption through RFCs, migration plans, and guidelines.
• Collaborate with cross-functional stakeholders to align technical strategy.
• Oversee risk management, on-call and incident response, code/design reviews, and knowledge sharing.

Skills

Swift

Objective-C

iOS development

AI fundamentals

MVVM architecture

VIPER architecture

LLM tools

Technical documentation

Mentoring engineers

Job description

Company Description

About Grab and Our Workplace

Grab is Southeast Asia's leading superapp. From getting your favourite meals delivered to helping you manage your finances and getting around town hassle-free, we've got your back with everything. In Grab, purpose gives us joy and habits build excellence, while harnessing the power of Technology and AI to deliver the mission of driving Southeast Asia forward by economically empowering everyone, with heart, hunger, honour, and humility.

Job Description

Get to know the team

Join the Consumer Experience Pax App Core team whose job is to make everyone building the Grab Super App faster. We own the architecture, build times, CI/CD and developer tooling behind one of the largest mobile codebases in Southeast Asia, and we are now extending that platform so engineers and AI agents can work in it side by side: the context, guardrails and primitives that let an agent make a safe change in a codebase this size, and the developer experience that lets a human trust it.

Get to know the role

As a technical leader, you will solve ambiguous, challenges and shape the architecture, infrastructure, and AI foundations that help Grab's engineers build the Super App faster and more safely. You will define coding principles and technical standards, assess and mitigate risks, monitor outcomes, and drive adoption across the wider iOS community. You will apply strong AI fundamentals and to determine what to build, adopt, or avoid. You will partner with technical and non-technical stakeholders from ideation through rollout, while mentoring and coaching colleagues, delegating effectively, and helping raise the team's bar through strong processes, standards, and hiring decisions.

You will be report to Mobile Engineering Manager

The Day-to-Day Activities

• Lead the technical direction of the PAX iOS app, including architecture, modularisation, and coding principles that enable engineers and AI agents to 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 and through risk management, on-call and incident response, code and design reviews, mentorship, knowledge sharing, and continuous improvement.

Qualifications

Must-Have Qualifications

• 7+ years of software engineering experience, including at least 5 years of iOS development, with expertise in Swift and Objective-C and experience working in large, long-lived codebases.
• Strong command of AI fundamentals for software engineering is essential, including context engineering, tool use, and function calling. Agentic workflows, retrieval, evaluation, and common failure modes are also crucial. Additionally, hands-on experience building, deploying, measuring, and safeguarding LLM-powered tools or product capabilities is required.
• Experience selecting, evolving, and guiding architectural approaches such as MVVM or VIPER, alongside a strong understanding of large-scale application operations, system internals, crash analytics, remote debugging, observability, and phased rollouts.
• Experience creating detailed technical documentation, with the ability to explain system health, growth opportunities, updates, and resolutions clearly to customers and cross-functional partners.
• Experience mentoring engineers and improving team processes, engineering standards, and ways of working.

Additional Information

Life at Grab

We care about your well-being at Grab, here are some of the global benefits we offer:

• We have your back with Term Life Insurance and comprehensive Medical Insurance.
• With GrabFlex, create a benefits package that suits your needs and aspirations.
• Celebrate moments that matter in life with loved ones through Parental and Birthday leave, and give back to your communities through Love-all-Serve-all (LASA) volunteering leave
• We have a confidential Grabber Assistance Programme to guide and uplift you and your loved ones through life's challenges.
• Balancing personal commitments and life's demands are made easier with our FlexWork arrangements such as differentiated hours

What We Stand For at Grab

We are committed to building an inclusive and equitable workplace that enables diverse Grabbers to grow and perform at their best. As an equal opportunity employer, we consider all candidates fairly and equally regardless of nationality, ethnicity, religion, age, gender identity, sexual orientation, family commitments, physical and mental impairments or disabilities, and other attributes that make them unique.