Category: Engineering

There are many factors in a PySpark program’s performance. PySpark supports various profiling tools to expose tight loops of your program and allow you to make performance improvement decisions, see more. However, memory, as one of the key factors of a program’s performance, had been missing in PySpark profiling. A PySpark program on the Spark […]

This year we announced the general availability of Delta Live Tables (DLT), the first ETL framework to use a simple, declarative approach to building reliable data pipelines. Since the launch, Databricks continues to expand DLT with new capabilities. Today we are excited to announce that Enhanced Autoscaling for Delta Live Tables (DLT) is now generally […]

Facial recognition technology is one of the many modern technologies that previously only appeared in science fiction movies. The roots of this technology can be traced back to the 1960s and have since grown dramatically due to the rise of deep learning techniques and accelerated digital transformation in recent years. In this blog post, we […]

Introduction Detecting fraud schemes used to require investigations using large amounts and varying types of data that come from many different anti-fraud systems. Investigators then need to combine the different types of data and use statistical methods to uncover suspicious claims, which is time consuming and inefficient in most cases. We are always looking for […]

Overview and initial analysis Knowledge management is often one of the biggest challenges most companies face internally. Teams spend several working hours trying to either inefficiently look for information or constantly asking colleagues about information already documented somewhere. A lot of time is spent on the internal employee communication channels (in our case, Slack) simply […]

In the real world, after a passenger places a GrabFood order from the Grab App, the merchant-partner will prepare the order. A driver-partner will then collect the food and deliver it to the passenger. Have you ever wondered what happens in the backend system? The Grab Order Platform is a distributed system that processes millions […]

Introduction Analysts need to analyse and simulate a rule on historical data to check the performance and accuracy of the rule. Backtesting enables analysts to run simulations of the rules and manage the results from the rule engine UI. Backtesting helps analysts to: Define the desired impact of the rule for our business and users. Evaluate […]

“Telematics”, a cross between the words telecommunications and informatics, was coined in the late 1970s to refer to the use of communication technologies in facilitating exchange of information. In the modern day, such technologies may include cloud platforms, mobile networks, and wireless transmissions (e.g., Bluetooth). Although the initial intention is for a more general scope, […]

Our consumers used to face a few common pain points while searching for food with the Grab app. Sometimes, the results would include merchants that were not yet operational or locations that were out of the delivery radius. Other times, no alternatives were provided. The search system would also have difficulties handling typos, keywords in […]

In earlier articles of this series, we’ve covered the importance of graph networks, graph concepts and how graph visualisation makes fraud investigations easier and more effective. In this article, we will explore how we use graph-based models to tackle fraud detection as fraud patterns increase and diversify. Grab has grown rapidly in the past few […]