Best of OAuth — September 2025

1. 1
   Article

   ByteByteGo·35w

   How Grab Built An Authentication System for 180+ Million Users

   Grab transformed their fragmented authentication system serving 180+ million users by adopting OpenID Connect (OIDC) and implementing Dex, an open-source federated identity provider. The solution unified authentication across internal and external applications, replacing multiple custom OAuth implementations with a standardized approach. Key features include token delegation for service-to-service communication, multi-IdP failover for high availability, and single sign-on capabilities. This centralized system improved security, reduced administrative overhead, and provided a consistent user experience across Grab's ecosystem of ride-hailing, payments, and delivery services.

   133

   1
2. 2
   Article

   Collections·33w

   Key Features and Enhancements in PostgreSQL 18

   PostgreSQL 18 introduces major performance improvements including asynchronous I/O that delivers up to 3x faster storage reads, NUMA support, and IO_uring on Linux. The release adds enterprise features like OAuth 2.0 authentication, temporal constraints, and virtual computed columns. Key enhancements include better extension loading for Kubernetes deployments, improved logical replication conflict handling, UUIDv7 support, and advanced vacuum operations for large tables. The update also brings query planning improvements with skip scan lookups and enhanced Unicode collation support.

   70

   3
3. 3
   Article

   The New Stack·35w

   Apache Kafka 4.1: The 3 Big Things Developers Need To Know

   Apache Kafka 4.1 introduces three major developer-focused features: Queues for Kafka (KIP-932) enabling cooperative message consumption with per-message acknowledgment, native JWT-Bearer authentication support eliminating static credentials, and a new Kafka Streams rebalance protocol for better coordination. The release also includes improvements to consumer group protocols, transaction handling, and unified metrics.

   32

   1
4. 4
   Article

   Confluent Blog·36w

   Apache Kafka 4.1 Release: New Features & Upgrade Guide

   Apache Kafka 4.1.0 introduces Queues in preview, a new Streams Rebalance Protocol in early access, and OAuth jwt-bearer grant type support. Key improvements include enhanced consumer group handling, better transaction error handling, plugin metrics registration, and Connect support for multiple connector versions. The release focuses on making Kafka more robust and easier to manage in production environments.

   12