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Building Billing Data Gateway v1.0.0: Why I Chose Zero-Copy Architecture
Most cloud billing systems spend more time moving data than processing it.
While building Billing Data Gateway v1.0.0, my goal was to reduce unnecessary memory copies and create a deterministic ingestion pipeline for large cloud billing exports.
Key engineering decisions included:
• POSIX mmap() for zero-copy file access
• Fixed-point 64-bit arithmetic for financial precision
• Bitmask-based validation for efficient record integrity checks
• Streaming JSON and CSV serialization
• High-performance C11 implementation targeting Linux systems
The result was a processing throughput of over 487,000 records per second in benchmark testing.
This project demonstrates how careful systems engineering can improve both performance and maintainability without relying on heavyweight frameworks.
The complete source code, case study, and downloadable product are available on my Contra profile and GitHub.
I'm continuing to build open-source systems software focused on performance, infrastructure, and developer tooling.
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