Pinterest built a real-time AI-assisted system to measure the prevalence of policy-violating content by tracking what users actually see, not just what they report.

engineering

foundational-model

trust-and-safety

11 min read

Machine Learning•2025-12-05

Improving Quality of Recommended Content through Pinner Surveys

Pinterest describes how Pinner (user) surveys are used to train a machine learning model that improves content quality recommendations across Homefeed, Related Pins, and Search.

Machine Learning•2025-12-04

On the (re)-prioritization of open-source AI

Pinterest shares its strategic shift toward fine-tuned open-source AI models, achieving comparable performance at less than 10% the cost of proprietary models.

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

Grab celebrates the 10th anniversary of its bug bounty program in partnership with HackerOne, reflecting on a decade of collaborative security research.

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

This article describes how Grab's internal AI platform SpellVault evolved from a no-code LLM app builder into an agentic AI platform capable of reasoning and acting dynamically.

Grab's Mac Cloud Exit supercharges macOS CI/CD

Grab migrated its macOS CI/CD infrastructure from a US cloud vendor to a self-owned colocation cluster in Malaysia, achieving major cost and performance gains.

Machine Learning•2025-11-04

How we built a custom vision LLM to improve document processing at Grab

Grab built a custom ~1B Vision LLM to improve eKYC document processing for Southeast Asian languages and documents.

GraphQL Data Mocking at Scale with LLMs and @generateMock

Airbnb introduces @generateMock, a GraphQL client directive that uses LLMs to automatically generate realistic, type-safe mock data for testing and prototyping.

From Static Rate Limiting to Adaptive Traffic Management in Airbnb’s Key-Value Store

Airbnb evolved Mussel, its multi-tenant key-value store, from simple QPS rate limiting to an adaptive traffic management system to maximize goodput during traffic spikes.

Deploy Safety: Reducing customer impact from change

Slack's Deploy Safety Program reduced customer impact hours by 90% over 18 months by overhauling deployment practices and safety culture.

Architecture•2025-09-24

Building a Next-Generation Key-Value Store at Airbnb

Airbnb shares how they completely rearchitected Mussel, their internal key-value store for derived data, migrating from v1 to a NewSQL-based v2 running in production for over a year.

Architecture•2025-09-17

Viaduct, Five Years On: Modernizing the Data-Oriented Service Mesh

Airbnb's Viaduct data-oriented service mesh celebrates five years with an open-source release and a major architectural overhaul called "Viaduct Modern".

Migrating Airbnb’s JVM Monorepo to Bazel

Airbnb completed a 4.5-year migration of their JVM monorepo (tens of millions of lines of Java, Kotlin, and Scala) from Gradle to Bazel.

Seamless Istio Upgrades at Scale

This post explains how Airbnb safely upgrades Istio across tens of thousands of pods on dozens of Kubernetes clusters without workload team coordination.

Machine Learning•2023-12-11

Declarative Feature Engineering at PayPal

PayPal describes their declarative (config-based) feature engineering paradigm used for real-time fraud detection ML across 400 million users.

engineering

declarative-programming

Getting inspired at the BBC Engineering Conference

BBC held its first Engineering Conference in Manchester in October 2022, bringing together over 600 engineers from 150+ teams.

Refactor → Organisation

This post explores how BBC's WebCore initiative required reorganizing the engineering organization alongside its technical refactoring to build a unified website for all BBC digital services.