Engineering

2 articles in this category.

All MTD Guides6 Tax Guides5 Comparisons5 Engineering2 Guides2 Features2

5 things that surprised me building on HMRC's Making Tax Digital API

Engineering notes from building a real MTD integration: Accept-header versioning, fraud prevention headers, cumulative quarterly updates, OAuth strictness, and sandbox quirks.

3 July 20267 min read

Engineering

Encrypting OAuth tokens at rest in a Node tax app (AES-256-GCM)

Why provider-level encryption at rest is not enough for OAuth tokens, and how to add an AES-256-GCM envelope with a zero-downtime backfill in Node and TypeScript.

3 Jul 202610 min read

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