Whether you’re implementing a new cloud-native core, expanding an existing platform, or modernising critical interfaces, we provide the architecture, engineering, and governance needed to deliver seamless, compliant, high-performance integrations across your banking ecosystem.
We help you connect the heart of your banking operations — safely, efficiently, and at scale.
Understanding Core Banking System Integration
Core banking platforms are the backbone of your financial infrastructure. They manage accounts, balances, transactions, payments, lending, deposits, and much more. But their real value is unlocked only when fully integrated with the wider ecosystem: digital channels, KYC/AML tools, fraud systems, payment rails, CRM platforms, risk engines, and external partners.
Integrating a core banking system is uniquely challenging. Data must be consistent. Transactions must be atomic. Flows must be auditable. And the entire environment must comply with regulatory expectations from the FCA, PRA, PSD2, DORA, and internal governance standards.
At 6B, we specialise in architecting and delivering integrations between core banking platforms and the systems that rely on them. We understand both the technical and operational realities of financial-grade integrations — high availability, low latency, strict security, traceability, and zero tolerance for errors. Whether you’re working with cloud-native cores like Thought Machine, Mambu, Temenos, Finxact, or a legacy platform, we tailor our integration approach to your architecture, regulatory posture, and business priorities.
Our Core Banking Integration Approach
Our approach begins with an in-depth assessment of your core platform, data model, API estate, and connected systems. We work closely with your teams to map dependencies, identify critical customer and operational journeys, and define the non-functional requirements such as performance, resilience, and auditability.
Based on this foundation, we design integration patterns aligned to your architecture strategy — whether API-first, event-driven, hybrid, or legacy-adapter-based — ensuring each connection is secure, reliable, and built for scale.
We support integrations across account and transaction services, lending and deposit modules, payments and messaging networks, onboarding and servicing channels, and essential risk, KYC/AML, and fraud systems.
Our engineers design for long-term maintainability, observability, and operational readiness, combining modern tooling and cloud-native practices with the governance and control required in regulated financial environments.
Throughout delivery, we prioritise end-to-end testing, resilience validation, and traceability to ensure your core banking integrations are robust, compliant, and production-ready.
Estimate the Cost of Your Core Banking System Integration Project
Please answer a few questions to help our interoperability and integration consultants accurately assess your needs and calculate a personalised quote quicker.
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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 Core Banking System Integration
- Confirm target core platform, modules, and APIs (e.g., accounts, payments, lending, deposits)
- Provide data models, schemas, and mapping requirements
- Define regulatory and compliance considerations (PSD2, DORA, FCA/PRA, AML/KYC, PCI DSS)
- Document performance, throughput, latency, and availability expectations
- Provide integration patterns already in use (synchronous, asynchronous, event-driven)
- Identify critical journeys: onboarding, payments, servicing, account actions, reporting
- Finalise environments, access, credentials, and security standards (OAuth, OIDC, MTLS)
- Agree SLAs, change controls, release governance, and audit requirements
- Confirm stakeholders including architects, product owners, compliance, and engineering leads