What We Do

Specialist Advisory Across the Payments Technology Stack

From authorisation switching and HSM key management to ISO 20022 migration and real-time scheme adoption — every service we offer is grounded in hands-on delivery experience inside payments infrastructure.

BASE24-EPSISO 8583HSM / Key ManagementPCI-DSS 4.0ISO 20022EMV / 3DS2SEPA InstantFaster Payments

Service Portfolio

Select a Service to Explore

BASE24Legacy PlatformACI WorldwideIDF / TDF Parameter TablesISO 8583 Message RoutingCustom Host InterfacesSTIP / Stand-in ProcessingMIGRATEBASE24-EPSModern Payments PlatformPayments Orchestration EngineProduct / IDF Table MigrationAuthorisation Engine ConfigISO 20022 Message MappingScheme Certification (Visa/MC)HSMThales payShield 10KKey Ceremony / ANSI TR-31ISO 20022pacs.008 / pacs.002Message Mapping LayerScheme CertVisa / Mastercard / UnionPayTPS Benchmarking01 Assess02 Design03 Build04 Test05 Cutover06 StabiliseBASE24 → BASE24-EPS Migration Architecture — Proximo Consultancy
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Authorisation switch modernisation from legacy BASE24 to the BASE24-EPS payments orchestration platform

Core Speciality

BASE24 & BASE24-EPS Migration

End-to-end programme advisory for organisations migrating their card authorisation switching infrastructure from legacy BASE24 to BASE24-EPS — covering parameter migration, HSM key management, downstream interface re-mapping, and scheme certification.

Why It Matters

Migrating from BASE24 to BASE24-EPS is one of the most technically complex programmes a payments organisation can undertake. The parameter migration alone — IDF tables, product codes, routing logic — can take months to validate. Our consultants have delivered these programmes before and know exactly where the risk concentrates.

What We Deliver

  • Current-state BASE24 environment assessment — transaction routing tables, IDF/TDF parameter sets, HSM key hierarchies, and downstream host interfaces
  • BASE24-EPS target architecture design: authorisation engine configuration, BASE24-EPS product table migration, and payments orchestration layer design
  • HSM integration planning — Thales payShield / Utimaco key ceremony procedures and key-block migration strategy
  • Interface re-mapping: ISO 8583 message format translation, acquirer host connectivity, and network management message (NMM) redesign
  • End-to-end test strategy: unit, integration, regression, performance (TPS benchmarking), and Visa/Mastercard scheme certification
  • Cutover planning: parallel-run architecture, transaction replay validation, and rollback procedures with defined go/no-go criteria
  • Post-migration hypercare: authorisation hit-rate monitoring, decline-reason analysis, and operational knowledge transfer

Full Portfolio

All Services at a Glance

BASE24Legacy PlatformACI WorldwideIDF / TDF Parameter TablesISO 8583 Message RoutingCustom Host InterfacesSTIP / Stand-in ProcessingMIGRATEBASE24-EPSModern Payments PlatformPayments Orchestration EngineProduct / IDF Table MigrationAuthorisation Engine ConfigISO 20022 Message MappingScheme Certification (Visa/MC)HSMThales payShield 10KKey Ceremony / ANSI TR-31ISO 20022pacs.008 / pacs.002Message Mapping LayerScheme CertVisa / Mastercard / UnionPayTPS Benchmarking01 Assess02 Design03 Build04 Test05 Cutover06 StabiliseBASE24 → BASE24-EPS Migration Architecture — Proximo Consultancy
Core Speciality

BASE24 & BASE24-EPS Migration

End-to-end programme advisory for organisations migrating their card authorisation switching infrastructure from legacy

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PAYMENTSPLATFORMBASE24 / BASE24-EPSHealth AssessmentAuthorisationEngineISO 8583 / TPSSettlementLayerEnd-of-Day / EOMSchemeInterfacesVisa / MC / AmexFraudControlsSTIP / Rules EngineHSMKey ManagementThales / UtimacoReconciliationExceptionsDispute ManagementTPS Score98.4BenchmarkedRisk ScoreLOWPost-RemediationPayments Infrastructure Assessment Topology — Proximo Consultancy

Payments Platform Assessment

Structured assessment of your payments technology stack — from the authorisation engine and switching fabric through to

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COMPLIANTProximo VerifiedPCI-DSS 4.0HSM ControlsNetwork SegmentationPSD3 / SCA3DS2 / SCAOpen Finance APIISO 20022pacs.008 / pacs.002Message MappingEMV / 3DS2Level 2 CertContactless CTLTokenisationEMVCO SpecApple / Google PayScheme MandatesVisa / MastercardMandate TrackingRegulatory Compliance Framework — Proximo Consultancy

Regulatory & Scheme Compliance

Expert guidance on navigating the overlapping regulatory and scheme compliance requirements that apply specifically to B

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Programme Delivery TimelineQ1 → Q4 202601 Mobilise & DiscoverWks 1–4100%02 Architecture & DesignWks 3–8100%03 Build & ConfigureWks 6–1880%04 Test & CertifyWks 14–2255%05 Cutover ExecutionWks 20–2630%06 Hypercare & StabiliseWks 24–3010%Q1Q2Q3Q4Risks12Actions34Issues3Decisions18Programme Delivery & PMO Dashboard — Proximo Consultancy

Programme Delivery & PMO

Senior programme directors and project managers who have delivered major payments transformation programmes — providing

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Vendor Evaluation MatrixIndependent weighted scoring — no commercial biasVendor AVendor BVendor CFunctional Fit907885Architecture859072Scalability (TPS)928578Resilience (RTO)888092Vendor Stability958880TCO / Pricing728590Weighted Total878483Vendor Selection & RFP Management — Proximo Consultancy

Vendor Selection & RFP Management

Independent support for selecting payments technology vendors — covering authorisation platforms, payments orchestration

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PAYMENTSSTRATEGYReal-TimePaymentsFPS / SEPA / FedNowOpen BankingAPI StrategyPSD3 / TPPDigital WalletsTokenisationApple / Google PayPlatformInvestmentBuild / Buy / PartnerRevenueOptimisationInterchange / FeesM&A AdvisoryDue DiligencePlatform RationalisePayments Strategy Framework — Proximo Consultancy

Payments Strategy

Strategic advisory for banks, processors, and fintechs navigating the rapidly evolving payments landscape — from real-ti

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Our Approach

How We Engage

01

Assess First, Recommend Second

We invest time upfront to understand your authorisation platform, your parameter configuration, your downstream interfaces, and your constraints — before we recommend anything.

02

Embed and Deliver

Our consultants work alongside your programme teams — in your war rooms, on your test environments, in your scheme certification calls. We take accountability for outcomes, not just advice.

03

Transfer and Exit

Every engagement ends with your team more capable than when we arrived. We document, train, and hand over — building internal capability, not dependency on external consultants.

Not Sure Which Service You Need?

Tell us about your programme — whether it is a BASE24 migration, a compliance gap, or a platform investment decision — and we will help you work out the right approach.

Talk to Us