systems

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On-Duty Amrita: Attendance for 5,000+ Students in Under 10 Days

Sep 12, 20265 min read

A college fest attendance workflow that checked each student's timetable before granting on-duty attendance. The domain rules, implementation scope, and meaning of the event's scale.

systemsengineering

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The Queue You Already Have: PostgreSQL, Retries, and Failure Recovery

May 30, 20267 min read

Build a PostgreSQL job queue around atomic claims, bounded retries, and explicit recovery. Understand what SKIP LOCKED guarantees and where idempotency must take over.

systemspostgresbackendengineering

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Why 0.1 + 0.2 Is Not 0.3: A Guide to Numeric Correctness

May 20, 20265 min read

Trace binary rounding from stored bits to program output, understand Go's constant arithmetic, and choose numeric types and comparisons that match your requirements.

systemscs fundamentalshow computers work

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systems

On-Duty Amrita: Attendance for 5,000+ Students in Under 10 Days

The Queue You Already Have: PostgreSQL, Retries, and Failure Recovery

Why 0.1 + 0.2 Is Not 0.3: A Guide to Numeric Correctness

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