Service-to-Service Authentication in Microservices: mTLS, JWTs, and the Token Exchange Pattern
Getting a request into your system is the easy part. The hard question arrives at hop two: when the order
Tag: Distributed Systems
Idempotency Keys Done Right: Building Retry-Safe APIs That Never Double-Charge
You hit “Place Order,” the spinner hangs for ten seconds, and you tap the button again. Now the fear sets
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PostgreSQL Isolation Levels: What Repeatable Read Actually Guarantees
Every PostgreSQL developer knows the four isolation levels from the SQL standard: Read Uncommitted, Read Committed, Repeatable Read, Serializable. Fewer
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Trace Context Propagation: Why Your Distributed Traces Break and How to Fix Every Hop
You open your tracing backend to debug a slow checkout request and find five disconnected traces instead of one. Five
Zero-Downtime Database Migrations: Expand-Contract, Backfills, and Locks
Every schema migration tool will happily tell you how to change a table. Almost none of them will tell you
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Native Sidecar Containers in Kubernetes: Ordering, Jobs, and the End of Shutdown Races
The sidecar pattern has been part of the Kubernetes toolkit for as long as pods have existed: run a second
Idempotency Keys: Making API Retries Safe by Design
The network drops the connection two seconds after your client sends the payment request. Did the charge go through? Your
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Dead Letter Queues in Kafka: Stop Poison Pills Before They Stop You
A message arrives that your consumer cannot parse. Maybe the producer shipped a new schema without telling anyone, maybe the
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SLOs You Can Actually Alert On: Error Budgets and Burn Rates in Prometheus
Every on-call rotation has a story about the alert that fires at 3 a.m. for something that isn’t wrong. CPU
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Caching Strategies in Distributed Systems: Cache-Aside, Write-Through, and Surviving the Thundering Herd
Almost every service that survives its own traffic eventually grows a cache. The idea is simple: the database is slow