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Logic Layer | Real Engineering Stories

@logiclayer

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How Java 21 Virtual Threads Pinned and Deadlocked Our Billing System

We were excited to migrate our billing and transaction gateway to Java 21. The promise was alluring: “virtual threads let you write…

Jul 03, 2026 · 6 min read · 50 claps paywalled #java21 #virtual-threads #deadlock

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The PR That Broke Everything

Apr 02, 2026 · 5 min read · 50 claps paywalled #java #performance #parallelstream

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It started as a bizarre security report from one of our users.

Jul 04, 2026 · 6 min read · 5 claps paywalled #memory-leak #backend-development #software-engineering

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On a Thursday afternoon, our real-time notification engine (which delivers email notifications, push notifications, and SMS alerts to…

Jul 05, 2026 · 5 min read · 0 claps paywalled #completablefuture #java-concurrency #executorservice

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The Grafana Graph That Haunted Me

Apr 04, 2026 · 5 min read · 0 claps paywalled #java #g1gc #jvm

Every backend engineer hits this point.

Nov 21, 2025 · 4 min read · 0 claps paywalled #spring-boot #spring-webflux #netty