Blueprint · 02 BNPL operator

A BNPL operator, composed in six weeks.

Reference architecture for launching a Buy-Now-Pay-Later operator in EU or UK on the Klyqo Banking OS. Persona + Alloy for KYC and fraud, Marqeta or Stripe Issuing for virtual cards, Modern Treasury for settlement, journey templates for approve · issue · collect. Connect to merchants via partner API, run the credit decision in 300 milliseconds, scale the book without re-platforming.

The use case

BNPL is a credit product disguised as a checkout button.

A successful BNPL operator runs three things excellently: sub-second underwriting at point-of-sale, instant card issuance for “buy now”, and disciplined collections for “pay later.” The merchant integration is the front door. The book is what kills you or compounds you.

€50–2000
Typical order value range
3 / 6 / 12 mo
Standard repayment terms
< 300 ms
Required decision latency
≤ 4%
Healthy NPL target (12 mo)
The architecture

Five layers + two rails. Klyqo composes them.

BNPL adds two things to the standard bank stack: a merchant-facing API at the channel layer, and tight integration between fraud + credit decisioning + card issuance at the marketplace layer. Klyqo orchestrates them as one journey, settled in 300ms, with audit trail for the regulator.

Compliance railFCA / EBA reporting
consumer-credit affordability checks, audit trail, transaction monitoring
Layer 5 · Channels
Merchant + consumer surfaces
Merchant API Checkout widget Consumer mobile Customer portal Email / SMS
Risk railCredit risk
real-time decisioning, NPL monitoring, dynamic limits
ComplianceEvery approval signed and logged. Adverse-action notices generated automatically per FCA CONC.
Layer 4 · Klyqo · the Banking OS
Runtime + marketplace dispatch
Compose Dispatch Run Observe Approve Issue Settle Service Collect
RiskCollections workflows. PAR30 / PAR90 dashboards. Write-off discipline. Dispute orchestration.
ComplianceEach provider call audited; PSD2 / SCA enforcement at the dispatch layer.
Layer 3 · Marketplace primitives & providers
The capabilities a BNPL operator actually needs
KYC · Persona Fraud · Alloy Cards · Marqeta / Stripe Issuing Settlement · Modern Treasury Notify · Twilio + Resend
RiskReal-time fraud signals + alt-data signals concatenated into the decision in < 300ms.
ComplianceLedger reconciles to scheme settlement reports. Treasury reporting for the regulator.
Layer 2 · Core banking
Mambu or Pismo · lending-fit
Credit product engine Loan accounts Repayment scheduling Ledger / GL
RiskCore enforces credit limits per customer + per merchant cohort.
ComplianceFCA consumer-credit licence + Article 7 EU regulation alignment.
Layer 1 · Foundation (yours)
Licence · capital · warehouse funding
FCA / EBA licence Equity (seed + Series A) Forward-flow / warehouse line
RiskWarehouse covenants + book quality define growth ceiling.
The canonical journey

Approve · issue · settle, end to end in 300 milliseconds.

A consumer hits “Buy now” on a merchant’s checkout. Klyqo orchestrates approve → issue → settle as a single typed journey; the customer sees one click; the merchant sees a confirmed payment; the bank sees a regulator-ready audit trail.

klyqo / journeys / bnpl-approve-issue-settle · LIVE
01
Checkout requestmerchant · partner API · order context + customer
< 50 ms
02
KYC + fraud checkPersona + Alloy · parallel dispatch, lowest-latency
~120 ms
03
Affordability + credit decisionbureau + alt-data · deterministic + agentic step
~80 ms
04
Virtual card issuedMarqeta / Stripe Issuing · single-use, locked amount
~40 ms
05
Settlement to merchantModern Treasury · settled or T+1 per merchant terms
T+0 / T+1
06
Customer servicingportal + reminders + collections schedule active
continuous
07
Collections (if needed)scheduled reminders → restructure → write-off
3–120 days
The providers used

What you pick from the marketplace.

A BNPL operator in this configuration uses five marketplace providers. Persona is production today; the others are in flight or scoped on request. The build sequence promotes them in the order the journey needs.

KYC · identity
Persona
Document + biometric for first-time customers. Frictionless for return customers (cached identity).
Live
Fraud · decisioning
Alloy
Real-time fraud signals + device intelligence. Concatenated into the credit decision at sub-100ms latency.
Roadmap
Cards · issuance
Marqeta / Stripe Issuing
Single-use virtual cards locked to the order amount. Settle to merchant on card auth.
In flight
Payments · settlement
Modern Treasury
Merchant settlement, refunds, chargebacks. Per-merchant terms (T+0, T+1, custom).
In flight
Core banking
Mambu (or Pismo)
Loan account per order. Schedule, repayment, GL export. Choose by region: Mambu for EU/UK, Pismo for LATAM.
In flight
Notify · messaging
Twilio + Resend
SMS for collections reminders, email for receipts + payment-day reminders. Multi-channel cadence.
Roadmap
What this blueprint is and isn’t

Honest about the build.

The work this blueprint represents

BNPL is brutal on the book. The three things that matter are (1) decision latency under 300ms, (2) fraud + credit signals concatenated correctly, and (3) collections discipline before the loss compounds. Klyqo orchestrates all three, but the underwriting policy and the warehouse line are yours.

What you bring: the FCA / EBA licence, the warehouse funding, the merchant agreements, the underwriting policy, the consumer-credit compliance posture. What Klyqo brings: the runtime, the marketplace adapters, the journey templates, the sub-300ms orchestration, the audit log. What we figure out together: which fraud + bureau combo for your specific market, which card issuer for your geography, which settlement terms per merchant tier.

If you’re launching a BNPL operator in EU or UK and want to ship a real product in six to eight weeks instead of a year: this blueprint is shipping toward your use case. Talk to us before you scope the build yourself.

Considering a BNPL launch?

If you’re a fintech founder, an established lender adding BNPL, or a merchant aggregator launching your own credit product — the first conversation is short, no deck. Tell us about the market, the licence, the warehouse line, the timeline. We will tell you honestly whether we are the right runtime today.

Email diogo@klyqo.com Response within two business days