Real-Time API Rate Limiting & Throttling Implementation
A fast-growing payments startup needed to prevent API abuse while maintaining sub-50ms latency. AxumSC was deployed as a lightweight edge rate-limiting layer.
Confidential - Leading FinTech Company
Technologies Secured
The Challenge
The client’s existing monolithic rate-limiting logic caused bottlenecks during peak hours (6–9 PM). Attackers exploited gaps in token-bucket logic, leading to 3x higher infrastructure costs and frequent false positives blocking legitimate traffic.
The Solution
AxumSC was integrated as a reverse-proxy middleware using sliding window counters and Redis-backed distributed state. Custom rules allowed per-API-key limits and burst handling without modifying core application code.
The Results
Latency dropped from 210ms to 42ms. False positives decreased by 94%. The team scaled to handle 3x traffic without additional servers. No further abuse-related incidents occurred in 6 months.
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