This Concurrency Bug Stayed Hidden for a Year
A deep dive into a subtle concurrency bug that evaded detection for over a year, exploring the root cause, debugging process, and lessons learned for building more robust systems.
Harshit Singhal
Backend engineer writing about API architecture, authentication, and real-world system tradeoffs.
Blog
Projects
ReAct Agent Framework
Production-style ReAct agent framework with pluggable tool registry, Gemini/Ollama provider abstraction, SSE-based reasoning trace streaming, and JWT-based ABAC authorization for tool-level access control.
About
I work on backend systems where API design, auth boundaries, and runtime behavior directly affect reliability. Most writing here is about practical tradeoffs in production systems.