The ledger is append-only
Balances are derived, never stored as the source of truth. Corrections are new entries, not edits. Any figure on any screen can be walked back to the events that produced it.
Industries / FinTech
A retry that double-charges. A balance computed two different ways in two different services. A report an auditor can't trace back to source events. These aren't edge cases in FinTech — they're the whole job. We build the architecture that makes them structurally impossible rather than merely unlikely.
Balances are derived, never stored as the source of truth. Corrections are new entries, not edits. Any figure on any screen can be walked back to the events that produced it.
Client-supplied idempotency keys, deduplication at the boundary, and exactly-once effects on top of at-least-once delivery. Retrying is always safe — including the retries you didn't write.
Access logs, change approvals, encryption posture and data lineage are emitted continuously by the platform. When the audit comes, you export — you don't excavate.
No shared admin credentials, no long-lived keys, no production database sitting one password away from a laptop. Access is short-lived, scoped, brokered and logged.
Event-sourced ledger cores with strict invariants, balance projections and point-in-time reconstruction for any account on any date.
Provider-agnostic payment flows with sagas, compensations, timeouts and dead-letter handling — so a partial failure never leaves money in limbo.
Automated three-way matching between your ledger, your processor and your bank, with exceptions routed to humans instead of buried in a nightly job.
PII and cardholder data isolated into a narrow, well-guarded blast radius: tokenisation, envelope encryption, and scope kept deliberately small.
Streaming feature pipelines that feed fraud and risk models with fresh data, plus the replay tooling to test a rule change against last quarter.
Guardrails as code: preventive controls in the account structure, detective controls in the pipeline, and drift reported the day it happens.
We don't sell certifications and we won't tell you which regime applies to your licence. What we do is build systems that make your compliance team's job mechanical instead of archaeological.
In practice that means we work with your auditors and advisors: they define the control, we implement it in code, and we make the evidence fall out of normal operation. If you don't have that function yet, we'll say so plainly — it's cheaper to hire it early than to retrofit it.
Discuss your architecture →The reconciliation that never balances, the migration nobody wants to run, the audit finding you'd rather not repeat. That's the conversation we're best at.