Designing Rate Limiters for Payment Systems Apr'26

Distributed-Systems

How to build rate limiters that protect authorization infrastructure without rejecting legitimate traffic. Token bucket math, sliding window trade-offs, and the distributed coordination problem.

Understanding ISO 8583 Bitmap Parsing Apr'26

Payments

How payment networks encode field presence using primary and secondary bitmaps in binary messages.

Go Error Wrapping Patterns Mar'26

Go

Wrap errors with what you were trying to do, not what went wrong. The original error already answers the latter.

Anatomy of a Supply Chain Attack: LiteLLM on PyPI Mar'26

Security

How TeamPCP compromised Trivy, backdoored LiteLLM's PyPI packages, and harvested credentials using .pth files and fork bombs.