Bubble.io + Xano stack. Transaction throughput plateaued; regulator required code-level traceability.
What they were actually dealing with.
A European B2B fintech processing over $50M a year had built its product on Bubble and Xano. That stack had taken them from nothing to real volume, which is the part most rebuild stories skip. It had also stopped being able to carry them.
Two pressures arrived at once. Transaction throughput had plateaued in a way no amount of workflow optimisation moved, and their regulator wanted code-level traceability that a no-code platform could not produce. Neither pressure permitted downtime: this was live money movement.
The decisions that actually mattered.
Not a task list. The four calls that determined whether this worked.
Ledger first, everything else second
In a payments product the correctness of the ledger is the whole engagement. A double-entry schema with an immutable transaction log was designed and reconciled against the existing data before any interface work began.
Parallel run, not a cutover weekend
The new system ran alongside the old one, processing the same events, with automated reconciliation comparing both. Discrepancies were found and resolved while the old system was still authoritative, which is the only responsible way to move money between stacks.
Traceability designed in, not retrofitted
Every state transition writes an audit record with actor, before, and after. This was built as the mechanism rather than added as a compliance feature, because retrofitting audit trails into an existing system is where most compliance projects overrun.
Cutover in stages, with the old system live
Traffic moved progressively, with the Bubble application kept running and readable throughout as a rollback path. No customer experienced a maintenance window.
Is this outcome remarkable or ordinary?
For calibration: SOC 2 Type II readiness is commonly quoted as a six-to-twelve-month programme when starting from a system without code-level controls. Passing in the following quarter reflects that the traceability was built into the migration rather than pursued afterwards as a separate project.
Source: General industry timelines for SOC 2 Type II readiness
“We were shopping for a rebuild vendor. We stayed for a team. They own the outcome, not just the code.”
If you're in the same position.
When a no-code platform becomes the constraint, the trigger is usually regulatory rather than technical. Throughput problems have workarounds; an auditor asking for code-level traceability does not. If compliance is on your roadmap, the migration conversation should start before the audit does.
You can generate an app in an afternoon.
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