Decision
Average balance isn't calculated. It's captured.
Why daily average balance in banking can't be rebuilt after the fact — the real decision was choosing which accrual tables to snapshot daily, knowing the cost is permanent.
Senior Data Engineer · Panama · UTC-5
Since 2013, mostly in places where a wrong number has consequences: a retailer going regional, and a bank replacing its core. Now I'm doing it on my own product too. This is where I write down the decisions — the numbers behind them, what I traded away, and what broke anyway.
Open to remote senior data engineering roles. Panama is UTC-5 — full overlap with US Eastern, no visa required, no timezone theater.
Decision
Why daily average balance in banking can't be rebuilt after the fact — the real decision was choosing which accrual tables to snapshot daily, knowing the cost is permanent.