Data Science Tools
Data Volume Calculator
Estimate how much data your system creates, from events per second and event size up to storage per day, month and year.
Blog
Practical technical articles and clear explanations.
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Finance Tools
XIRR calculator
Work out the true yearly return on your SIP or any set of cash flows, even when you invest different amounts on different dates.
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Finance Tools
FIRE number calculator
Find your FIRE number: how much you need saved to retire early, based on your yearly spending and a safe withdrawal rate.
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Data Science
Why Knowing HashMaps Won’t Make You a Better Engineer?
A decision map for choosing data structures: when to index, partition, cache, stream or compress, and the real systems that use each one
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Data Science
Mental model for SQL queries
A simple mental model for SQL: the order in which SQL really runs each clause, so your queries make sense and bugs are easier…
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Finance Tools
Break Even Calculator
Calculate your break-even point in units and revenue. Includes contribution margin, margin of safety and a visual chart.
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Finance Tools
Runway Calculator
Work out exactly how many months of cash you have left. Runway calculator with zero-cash date, net burn and scenarios for cutting spend.
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Artificial Intelligence
What LLM Engineers Actually Build?
Discover how LLM engineering transforms raw AI models into scalable, accurate enterprise systems using data pipelines, RAG, and optimization techniques.
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Data Engineering
Webhook vs Polling: Why Modern Systems Stop Asking Questions
Who should speak first? Should a client repeatedly ask, "Has anything changed?" Or should the server simply respond, "Something changed." That seemingly…
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Programming
Python installation in Windows
A quick, step-by-step guide to installing Python on Windows with the new Python install manager, and checking that it works.
