Engineering – Noise

A Decade of Defense: Celebrating Grab’s 10th Year Bug Bounty Program

Grab Tech — Mon, 01 Dec 2025 00:00:10 +0000

Introduction Ten years ago, we launched our bug bounty program in partnership with HackerOne. Beyond a security initiative, it represented an open invitation to collaborative development. As pioneers in Southeast Asia, we began the program with 23 ini...

Real-time data quality monitoring: Kafka stream contracts with syntactic and semantic test

Grab Tech — Wed, 26 Nov 2025 00:00:10 +0000

Introduction In today’s data-driven landscape, monitoring data quality has become a critical need for ensuring reliable and efficient data usage across domains. High-quality data is the backbone of AI innovation, driving efficiency and unlocking new o...

SpellVault’s evolution: Beyond LLM apps, towards the agentic future

Grab Tech — Fri, 21 Nov 2025 00:00:10 +0000

Introduction At Grab, innovation isn’t just about building new features; it’s about evolving our platforms to meet the changing needs of our users and the broader technological landscape. SpellVault, our internal AI platform, exemplifies this philosop...

Finding the grain of sand in a heap of Salt

Opeyemi Onikute — Thu, 13 Nov 2025 14:00:00 +0000

We explore the fundamentals of Saltstack and how we use it at Cloudflare. We also explain how we built the infrastructure to reduce release delays due to Salt failures on the edge by over 5%.

Grab’s Mac Cloud Exit supercharges macOS CI/CD

Grab Tech — Thu, 06 Nov 2025 00:00:05 +0000

Introduction In our mission to optimize continuous integration and delivery (CI/CD), we have taken a bold step by relocating our infrastructure from a cloud vendor in the US to a colocation cluster within Southeast Asia, closer to our Git server infra...

How We Built a Custom Vision LLM to Improve Document Processing at Grab

Grab Tech — Tue, 04 Nov 2025 00:00:10 +0000

Introduction In the world of digital services, accurate extraction of information from user-submitted documents such as identification (ID) cards, driver’s licenses, and registration certificates is a critical first step for processes like electronic ...

Machine-learning predictive autoscaling for Flink

Grab Tech — Thu, 30 Oct 2025 00:00:10 +0000

Introduction As Grab transitions to derive more valuable insights from our wealth of operational data, we are witnessing a steep increase in stream-processing applications. Over the past year, the number of Flink applications grew 2.5 times, driven by...

Modernising Grab’s model serving platform with NVIDIA Triton Inference Server

Grab Tech — Tue, 21 Oct 2025 00:00:10 +0000

Introduction Catwalk is Grab’s machine learning (ML) model serving platform, designed to enable data scientists and engineers in deploying production-ready inference APIs. Currently, Catwalk powers hundreds of ML models and online deployments. To acco...

Highly concurrent in-memory counter in GoLang

Grab Tech — Mon, 06 Oct 2025 00:00:10 +0000

Introduction Ah, the familiar beep beep beep but don’t worry, it’s not your alarm coaxing you out of bed. No, this is far worse: the dreaded PagerDuty on-call alert! What’s the crisis this time? There appears to be an issue with high database CPU util...

Cloudflare just got faster and more secure, powered by Rust

Richard Boulton — Fri, 26 Sep 2025 14:00:00 +0000

We’ve replaced the original core system in Cloudflare with a new modular Rust-based proxy, replacing NGINX.

Eliminating Cold Starts 2: shard and conquer

Harris Hancock — Fri, 26 Sep 2025 13:00:00 +0000

We reduced Cloudflare Workers cold starts by 10x by optimistically routing to servers with already-loaded Workers. Learn how we did it here.

User foundation models for Grab

Grab Tech — Fri, 26 Sep 2025 00:00:10 +0000

Introduction Artificial intelligence (AI) is central to Grab’s mission of delivering valuable, personalised experiences to millions of users across Southeast Asia. Achieving this requires a deep understanding of individual preferences, such as their f...

Safe in the sandbox: security hardening for Cloudflare Workers

Erik Corry — Thu, 25 Sep 2025 14:00:00 +0000

We are further hardening Cloudflare Workers with the latest software and hardware features. We use defense-in-depth, including V8 sandboxes and the CPU's memory protection keys to keep your data safe.

Powering Partner Gateway metrics with Apache Pinot

Grab Tech — Tue, 23 Sep 2025 00:00:10 +0000

Introduction Grab operates as a dynamic ecosystem involving partners and various service providers, necessitating real-time intelligence and decision-making for seamless integration and service delivery. To facilitate this, GrabDeveloper serves as Gra...

Taming the monorepo beast: Our journey to a leaner, faster GitLab repo

Grab Tech — Tue, 16 Sep 2025 00:23:00 +0000

At Grab, our engineering teams rely on a massive Go monorepo that serves as the backbone for a large portion of our backend services. This repository has been our development foundation for over a decade, but age brought complexity, and size brought sl...

Post-quantum security for SSH access on GitHub

brian m. carlson — Mon, 15 Sep 2025 16:00:00 +0000

GitHub is introducing post-quantum secure key exchange methods for SSH access to better protect Git data in transit.

The post Post-quantum security for SSH access on GitHub appeared first on The GitHub Blog.

Data mesh at Grab part I: Building trust through certification

Grab Tech — Tue, 19 Aug 2025 00:23:00 +0000

Introduction At Grab, our journey towards a more robust and scalable data ecosystem has been a continuous evolution. Considering the size of our data lake and complexity of our ecosystem, with businesses spanning across ride hailing, food delivery, a...

The evolution of Grab’s machine learning feature store

Grab Tech — Thu, 24 Jul 2025 00:23:00 +0000

Introduction In this post, we outline how we transformed the way we serve data for our machine learning (ML) models and why we chose Amazon Aurora Postgres as the storage layer for our new feature store. At Grab, we have always been at the forefront o...

Building Jetflow: a framework for flexible, performant data pipelines at Cloudflare

Harry Hough — Wed, 23 Jul 2025 14:00:00 +0000

Faced with a data-ingestion challenge at a massive scale, Cloudflare's Business Intelligence team built a new framework called Jetflow.

Grab’s service mesh evolution: From Consul to Istio

Grab Tech — Wed, 16 Jul 2025 00:00:10 +0000

The challenge: When good enough isn’t good enough Picture this: It’s 2024, and Grab’s microservices ecosystem is thriving with over 1000 services running in different infrastructure. But behind the scenes, our service mesh setup is showing its age. We...