Idempotency keys are a contract, not a feature
Why retries in payment systems demand an explicit agreement between client and server.
Payments
A personal notebook
Aniket Srivastava
I'm Aniket — a software engineer and a curious individual. I write about ideas, experiences, technology, and everyday life. My interests wander through sports, game theory, and human behavior; away from work, it's chess, travel, football, and books.
Recent writing
View allConsensus, without the math
An intuition-first tour of Raft for engineers who ship, not prove.
Distributed Systems
Every good ledger is append-only
Double-entry bookkeeping as the original event-sourced system.
Payments
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The engineering side
A little about my engineering life
I’m a software engineer at Atlassian, working on cloud migration infrastructure and large-scale data movement. Over 7+ years, my journey has taken me through three Indian unicorn startups — Razorpay, Mindtickle, and PhonePe — building and scaling backend systems in fast-growing engineering environments.
More about my engineering work →