https://nathanslaughter.com/posts/Recent content in Writing on Nathan SlaughterHugo -- 0.165.0en-usSun, 18 Oct 2026 00:00:00 -0500https://nathanslaughter.com/posts/designing-a-financial-data-api-customers-can-keep-in-sync/Sun, 18 Oct 2026 00:00:00 -0500https://nathanslaughter.com/posts/designing-a-financial-data-api-customers-can-keep-in-sync/A customer loads your dataset once, then keeps it current through corrections and reruns old research. How to design the export, change stream, and as-of queries that make all three work.https://nathanslaughter.com/posts/designing-a-data-sdk-for-downloads-that-fail-halfway/Sat, 17 Oct 2026 00:00:00 -0500https://nathanslaughter.com/posts/designing-a-data-sdk-for-downloads-that-fail-halfway/When a download fails on page four, the customer's job needs to know what it saved and where to resume. How to design an SDK's interface, errors, and retries around that moment.https://nathanslaughter.com/posts/checking-whether-your-data-feeds-deliver-what-you-pay-for/Fri, 16 Oct 2026 00:00:00 -0500https://nathanslaughter.com/posts/checking-whether-your-data-feeds-deliver-what-you-pay-for/A feed can arrive on time and still hold yesterday's data. How to define what each delivery should contain, check it when it's due, and keep a record of what your vendor delivered.https://nathanslaughter.com/posts/the-timestamps-that-make-financial-data-usable/Wed, 14 Oct 2026 00:00:00 -0500https://nathanslaughter.com/posts/the-timestamps-that-make-financial-data-usable/A backtest needs each number as it was known when the decision was made. Publication dates answer that for nightly strategies; intraday strategies also need the provider's delivery time.