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Practical writing on connecting business systems: platform-specific guides, integration patterns that hold up in production, and the mistakes that make projects overrun. Written by the engineers who deliver the work.
Integration patterns · Featured
Why two-way sync fails, and the four conflict rules that fix it
Most bidirectional integrations are built as two one-way flows pointed at each other. That works until both systems change the same record in the same minute. Here is how to decide which side wins, and how to prove it afterwards.
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Accounting & finance
Multi-currency integration: Handling multi-currency between ecommerce and ERP for eBay and Shopify
A practical look at multi-currency integration for teams connecting eBay, Shopify and the systems around them, and the decisions that keep the data trustworthy.
Legacy bridging
When a legacy system REST wrapper is the right call
A legacy system REST wrapper is often dismissed as a stopgap. Used deliberately, with clear boundaries around reads, writes and ownership, it is frequently the most defensible option available to a finance or operations team.
Accounting & finance
Credit notes and partial refunds: getting the refunds accounting integration right
Order posting is the easy half of the ledger. Refunds arrive late, in fragments, from systems that never agreed on what a line item means — and they land against documents that are already paid, allocated or closed.
Platform guides
Shopify Admin API rate limits: what they actually mean for a busy store
Leaky-bucket throttling, bulk operations and the point at which a webhook-driven design stops being optional.
Accounting & finance
Posting ecommerce orders to Sage without breaking VAT
Mixed baskets, gift cards, marketplace fees and refunds — the four cases that cause reconciliation to fail months later.