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A set of real-world microservices case studies from fintech, banking, and highload consumer products — what problem each team faced, which approach they picked, and the code that actually shipped.
The practical patterns for logging and debugging distributed Java systems — what to log, what never to log, how to make logs useful at 3 AM, and the debugging techniques that actually work when the bug only reproduces in production.
A walkthrough of taking a monolithic Java backend through the scaling journey — what we changed at each stage, what broke, and the concrete decisions that moved the needle when traffic grew 50×.
How to actually know what your distributed system is doing in production — the three signals, the tools that compose them, and the operational discipline that turns telemetry from cost center into debugging superpower.
The unvarnished version. What actually breaks in production Java microservices, the lessons that don't show up in architecture talks, and the small habits that separate teams that sleep at night from teams that don't.
The things nobody tells you about event sourcing until you've run it in production — snapshot strategies, schema evolution, event stream hygiene, and when to walk away.