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Get to Know the Team The Fulfilment tech family is one of the most important pillars ensuring Grab to out-serve our customers and partners in different businesses and marketplaces across Southeast Asia. We are working on high throughput, real-time distributed systems that use machine learning techniques to solve hundreds of millions of requests per day. Our mission is to offer the best products and experiences to our driver partners as to increase adoption and engagement of our services. Improve driver partner opportunities and efficiency to fulfil customer orders without fail, rain or shine. And to create efficient marketplaces by determining a price that is both sustainable and loved by our partners and customers. Our team members are in Indonesia and Singapore. Get to Know the Role We are seeking experienced and passionate Software Engineers to join our team. You will have opportunities to lead a small team of software engineers to work on multiple backend service clusters. It is very important that our team members to initiatively identify problems and have the right mindset and skills to solve them. You will be reporting to Software Engineering Manager II, Backend and the role will be base onsite in our Petaling Jaya, Selangor, Malaysia office. The Critical Tasks You Will Perform Develop and maintain backend services and APIs with a focus on reliability and scalability. Write efficient database queries (e.g., MySQL, Presto) and optimize system performance through profiling and troubleshooting. Contribute to projects on cloud platforms (AWS, GCP, or Azure) and support deployments via CI/CD pipelines. Implement and maintain automated testing (unit, integration, and end-to-end) to ensure code quality. Gain exposure to distributed computing frameworks such as Apache Flink, while building services in Golang and Scala. Collaborate with senior engineers and cross-functional teams to deliver high-quality technical solutions. What Essential Skills You Will Need More than 4 years of experience in backend development. Familiarity with large-scale distributed web or API services, including systems internals and networking. Hands-on experience with databases and query languages such as MySQL or Presto. Strong understanding of system performance, with ability to profile and resolve bottlenecks. Experience with cloud platforms (AWS, GCP, or Azure), testing frameworks (unit, integration, E2E), and CI/CD pipelines. Hands-on experience using any language and willing to work on Golang and Scala (Flink) 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 provides equal opportunity for Grabbers to grow and perform at their best. We consider all candidates fairly and equally regardless of nationality, ethnicity, race, religion, age, gender, family commitments, physical and mental impairments or disabilities, and other attributes that make them unique.

Get to Know the Team The Enterprise Information Security (EIS) team safeguards Grab's corporate infrastructure so our workforce can operate securely and efficiently. We built and enforced defense-in-depth preventative controls spanning Endpoint security, Internet security, Enterprise application security, Data loss prevention, and Corporate Generative AI (GAI) security. Alongside Grabber Technology Solutions (GTS) function, we collaboratively provide a secure and seamless user experience for our Grabbers. Get to Know the Role You are an individual contributor who is responsible to work on complex enterprise security controls and work cross-functionally across Cyber Security, GTS and other departments. Specifically, you will lead an EIS sub-service workstream, and use GAI and automation to shape and scale enterprise security within Grab. If you enjoy solving challenging enterprise security problems, we will give you the opportunity to make a regional impact. You will report to the Senior Manager, Enterprise Information Security and be based onsite at our office based in Petaling Jaya. The Critical Tasks You Will Perform You will manage one of the EIS sub-services workstreams: Endpoint Security, Internet Security, Corporate Data Loss Prevention, and Enterprise Application Security. You will lead and collaborate on cross-functional projects including vulnerability management, shadow IT, data leakage prevention etc. You will enforce security policy and controls to protect our corporate environment, yet enabling business by triaging exceptions via balancing the benefit and trade-offs between security and operations. You will innovate through GAI and automation: Develop and implement automated workflows, MCPs, and custom scripts to automate or "agentify" security tasks, reducing manual overhead and improving response times. What Essential Skills You Will Need Bachelors Degree in Information Security, Cybersecurity or a relevant field 2+ years of relevant working experience Hands-on expertise with industry-standard security tools, specifically Crowdstrike (Falcon, Spotlight), ZScaler (ZIA/ZPA), Google Workspace Native Controls, and Email Security gateways. Proficiency in Unified Endpoint Management (UEM) platforms, including JAMF (macOS) and VMware Workspace ONE (Windows/Mobile). Demonstrable scripting skills (e.g., Python, Bash, or Apps Script) and GenAI (e.g. MCPs) to optimize security operations. Strong problem-solving abilities, excellent communication skills, stakeholder experience, adaptability in fast-paced environments, and a collaborative mindset. Open to fresh graduates 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 provides equal opportunity for Grabbers to grow and perform at their best. We consider all candidates fairly and equally regardless of nationality, ethnicity, race, religion, age, gender, family commitments, physical and mental impairments or disabilities, and other attributes that make them unique.

Get to Know the Team The Fulfilment Tech Family builds the systems that power Grab's marketplaces across Southeast Asia. We design real-time, distributed systems and Machine Learning (ML) solutions that process hundreds of millions of requests each day. Our work drives supply allocation, pricing, and order matching for millions of users and driver-partners.Our mission is three-fold: Deliver products that work for our driver-partners Meet consumer demand, regardless of conditions Build marketplaces that balance experience and cost for everyone involved We are looking for a Senior Principal Data Scientist to lead our shift toward automated marketplace optimization. You'll advance how we use data and ML to automate pricing, dispatch, and supply management decisions. Get to Know the Role This is a Senior Principal individual contributor role where you'll build the foundation for autonomous, learning-driven marketplace systems. You'll work at the intersection of reinforcement learning, large language models, and production systems that operate at scale. Your work centres on two areas: Reinforcement Learning (RL) Systems: You'll develop systems that jointly optimize pricing, dispatching, and supply repositioning. You'll build decision agents that handle multiple objectives and adapt when real-world conditions change. LLM-Based Behavioural Intelligence: You'll architect systems using fine-tuned language models to predict, explain, and simulate user decision-making at scale. These models will power the next generation of marketplace automation. You'll serve as the technical lead for a small team, guiding both research direction and production implementation. You'll report to the Head of Data Science and work from Grab's One-North Singapore office. The Critical Tasks You will Perform You'll: Design and implement end-to-end RL systems that combine model-based RL, offline RL, simulation, and online learning into a unified training pipeline. This includes creating state representations and reward structures that balance short-term results with long-term outcomes. Build latent world models and marketplace state representations that capture supply-demand interactions, location-based patterns, and behavioural signals from users and drivers. Develop systems that optimize across multiple marketplace levers simultaneously—pricing, dispatching, and supply repositioning—to expand the set of achievable outcomes for the business. Create policy evaluation frameworks and establish monitoring systems that allow safe deployment of new decision-making policies in production. Fine-tune open-source large language models on domain-specific data to build capabilities for prediction, reasoning, and simulation within marketplace applications. Design and implement training strategies for language models, including supervised fine-tuning, preference-based alignment, and iterative improvement methods. Work with data engineers and backend engineers to integrate RL and LLM systems into real-time production environments serving millions of users. What Essential Skills You Will Need You have PhD in Computer Science, Operations Research, Applied Mathematics, or related field with at least 10 years of experience — to lead complex technical initiatives spanning research and production systems. You are proficient in RL fundamentals — including Markov Decision Processes, stochastic control, and reward design trade-offs. You'll apply these to build closed-loop systems that make sequential decisions in the marketplace. You have experience building production ML/ RL systems with online learning or simulation-based optimization — to deploy models that learn and adapt in real-time environments. You have knowledge in world models and sequential modelling — including latent dynamic models (RNNs, transformers, state-space models) and representation learning for complex systems. You'll use these to model marketplace dynamics accurately. You have hands-on experience fine-tuning large language models in production — including supervised fine-tuning and at least one preference-based alignment method (RLHF, DPO, or GRPO). You'll apply parameter-efficient methods (LoRA, QLoRA, or PEFT) and understand their trade-offs in accuracy, memory, and cost. You can design evaluation frameworks for generative models — including metrics for factual accuracy and reasoning quality. You'll use these to validate model outputs before deployment. You have experience with distributed training frameworks — such as DeepSpeed, FSDP, or Megatron-LM. You'll use these to train large models efficiently across multiple GPUs or nodes. You are proficient in Python and ML frameworks (PyTorch or TensorFlow) — to implement models and integrate with production codebases. You have experience with scalable computing platforms — such as Spark or Ray. You'll use these to process large datasets and distribute training workloads. You can translate ambiguous business problems into concrete modelling tasks — to identify what can be solved with ML/RL and define the scope, data requirements, and success criteria. 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 provides equal opportunity for Grabbers to grow and perform at their best. We consider all candidates fairly and equally regardless of nationality, ethnicity, race, religion, age, gender, family commitments, physical and mental impairments or disabilities, and other attributes that make them unique.

Get to Know Our Team We are the architects of trust. Our mission is to shield the Grab ecosystem from evolving fraud and safety threats by turning massive datasets into applicable intelligence. From deploying sequence-based models for payment risk to applying graph algorithms that unmask complex money laundering networks, we operate at the intersection of deep learning and platform security. We don't just react; we innovate, researching the latest methods to neutralise tactics before they even surface. Get to Know the Role You will fight fraud by analysing transactional data, developing and deploying machine learning models, and collaborating with cross-functional teams to ensure the seamless integration of fraud detection systems. Reporting to the Data Science Manager II, you will work as an Individual Contributor in a full-time, on-site role at our office in Petaling Jaya, Malaysia. In this role, you will push the boundaries of machine learning and LLM applications at a massive scale, growing your expertise in cutting-edge agentic systems. Apply today to help keep our platform safe and trustworthy! The Critical Tasks You Will Perform You will partner with teams to architect scalable data science solutions that translate complex operational challenges into strategic wins, integrating both traditional ML and agentic LLM systems. You will conduct cutting-edge research to incorporate the latest advancements in algorithms and generative AI into our defense systems to actively counter emerging fraud tactics. You will master data orchestration by preparing, augmenting, and combining diverse data types to build high-fidelity training datasets, including using LLMs to generate synthetic data and labels. You will design, train, and fine-tune model architectures, utilizing a toolkit that includes Graph Neural Networks (GNNs), Transformers, fine-tuned open-source LLMs (like Qwen), and Gradient Boosted Trees. You will lead the end-to-end lifecycle of your models—from production deployment to performance monitoring—iterating alongside software and product engineering teams. You will leverage Generative AI tools (like coding assistants and analytical co-pilots) in your daily workflows to accelerate code generation, automate testing, and enhance your overall productivity. The Essential Skills You Will Need You hold a degree in Computer Science, Physics, Statistics, Mathematics, Engineering, Economics, or a related quantitative field. You have at least 3 years of experience with proficiency in Python and SQL, alongside practical experience using distributed engines like Spark to wrangle and process large-scale datasets. You have hands-on experience building and deploying machine learning models using standard libraries such as TensorFlow, PyTorch, XGBoost, LightGBM, or Scikit-learn. You have practical experience with deep learning architectures (Transformers, RNNs, CNNs) and traditional ML (Boosted Trees), demonstrating the ability to choose the optimal architecture for specific problems. You have an understanding of LLM and Agentic system foundations (e.g., RAG, Transformers) and hands-on experience building or using frameworks like LangGraph, LangChain, or Claude subagents. You have experience engaging with AI tools and emerging technologies to enhance productivity, improve workflows, and contribute new ideas. 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. 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.