Whether you’re integrating a new core banking system, connecting to payment networks, enabling card processing, embedding Banking-as-a-Service capabilities, or linking wealth and investment platforms, we provide the architecture, engineering, and governance needed to deliver stable, compliant interoperability at scale.
We help you build an ecosystem where systems communicate effortlessly — reducing operational friction, improving customer experience, and enabling faster innovation.
Understanding Interoperability and Integration in Financial Services
Financial services ecosystems are becoming increasingly interconnected — spanning core banking platforms, payments networks, identity providers, fraud systems, card processors, BaaS platforms, open banking APIs, and wealth and investment technologies.
Integrating these systems is complex. Data must be exchanged securely. Services must remain resilient. Processes must comply with regulations such as PSD2, FCA/PRA guidelines, DORA, PCI DSS, AML/KYC, and internal governance frameworks. Latency, reliability, and auditability are critical.
At 6B, we specialise in designing and delivering integration architectures that balance performance, compliance, and operational risk. We understand the demands of large-scale transactions, the strict requirements around data handling, and the need for stability in high-availability financial systems.
From modern API-driven architectures to event-based systems and legacy mainframe integrations, we help financial institutions create robust connectivity that supports growth and innovation.
Our Interoperability and Integration Approach
We begin with a detailed assessment of your current architecture, data flows, dependencies, and risk profile. We align with your technology strategy, security standards, and regulatory obligations, and define integration patterns that support your long-term scale and resilience.
Our work typically includes:
- API design, delivery, and lifecycle management
- Event-driven and streaming architectures (Kafka, MQ, cloud-native services)
- Core banking system integration (cloud-native and legacy platforms)
- Payments and messaging integration (FPS, SEPA, SWIFT, ISO 20022, Open Banking)
- Card and payments infrastructure integration (acquirers, processors, gateways, 3DS, tokenisation)
- BaaS and embedded finance platform integration
- Wealth, portfolio, and investment platform integration
- Data integration, transformation, and real-time pipelines
- IAM, authentication, KYC/AML, and fraud systems integration
- Cloud migration and hybrid connectivity patterns
- Integration governance, documentation, and regulatory alignment
We design integrations that are secure, observable, scalable, and easy to maintain — using modern cloud-native approaches while respecting legacy realities.
We also provide comprehensive testing — functional, performance, security, failover, and resilience — ensuring every connection is safe, compliant, and production-ready.
Estimate the Cost of Your Interoperability and Integration Project
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Thank you for your request! 🙌 We will review your project and get back to you within 24 hours to share a ballpark estimate.
Want to speak to someone today? Call 6B on 0113 350 1290.
Readiness checklist for Interoperability and Integration
- Confirm systems, platforms, and services in scope (core banking, payments, cards, BaaS, wealth, data platforms)
- Provide architecture diagrams, data models, API specifications, and connectivity requirements
- Define regulatory considerations including PSD2, PCI DSS, AML/KYC, DORA, and internal governance obligations
- Document SLAs, throughput and performance expectations, and resilience requirements
- Finalise authentication and security standards (OAuth, OIDC, MTLS, tokenisation, encryption)
- Agree integration patterns, data contracts, event models, and message schemas
- Identify product owners, domain SMEs, engineering leads, and compliance reviewers
- Ensure environments, test data, access, and monitoring tools are available