News from last month (2025/09 edition)

Scala/Java

• Using Scala in a Go-First Company - Slidev
• JVM essentials for Elasticsearch: Metrics, memory, and monitoring - Elastic Blog
• Alexandru Nedelcu - Effects and concurrency in functional programming - YouTube
• Understanding Contramap - A Developer’s Experience

Data

• Streaming and the RAD Stack - by Yaroslav Tkachenko

Other

• Designing a Payment System - by Gergely Orosz
• How to Name Your Metrics - OpenTelemetry
• Git Cheat Sheet
• Effective context engineering for AI agents \ Anthropic
• Advent of Code: 500 Stars
• Rebase, Merge, and the Philosophy of History in Git - by Elias W. BA - Aug, 2025 - Medium