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Product updates, payment architecture notes and practical guides from the Pay Engineers team.

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Latest articles

Browse all published posts from the team.

All Payment infrastructure (6) Regulation & compliance (5) Product & strategy (4) Security & risk (3) Engineering (4)
Featured
Engineering

Event-driven settlement pipelines that finance can trust

From authorisation events to books-ready settlement figures, finance teams need deterministic, replayable pipelines rather than eventual-consistency folklore. We explain how explicit batches, checksum reconciliation and human exception workbenches turn month-end from a fire drill into a routine.

18/07/2026 5 min 3,751 0
Engineering

API design principles for merchant integrations

Resource naming, signed webhooks and genuinely usable sandbox credentials do more to reduce support load than any amount of documentation polish. We cover the painful integration paths — partial captures, late refunds, disputed chargebacks — that separate great payment APIs from merely functional ones.

06/07/2026 5 min 1,082 0
Engineering

Observability for payment systems

Infrastructure metrics alone consistently miss payment reality: authorisation rates by BIN country, 3DS challenge success and settlement file freshness tell a very different story than CPU graphs. We explain how to trace across acquirer dependencies and alert on customer impact instead of noise.

02/07/2026 5 min 2,714 0
Engineering

Migrating between PSPs without a big-bang cutover

Big-bang PSP cutovers are how outages happen, and traffic-shifting migrations with clear rollback plans consistently outperform weekend deploys. We explain dual-running, cohort-based migration and the credential isolation that keeps a provider switch low-drama for merchants.

27/06/2026 5 min 412 0