Core banking platforms (FIS, Fiserv, Jack Henry)
The dominant core banking platforms for U.S. regional banks and credit unions are FIS, Fiserv, and Jack Henry & Associates. These platforms run the core deposit, loan, and general ledger systems that the bank's operations depend on. For regional FIs modernizing customer experience without ripping out the core, integration around the core is the architectural pattern.
How Thoughtwave integrates core banking
Our engagements cover:
- API and middleware integration with the specific core platform's integration layer (FIS Code Connect, Fiserv DNAapp, Jack Henry Symitar, jxchange).
- TWSS WaveSols Banking platform deploying as the modern customer-experience layer on top of legacy cores.
- Real-time event integration for the emerging event-driven patterns modern cores support.
- Batch file integration for legacy workflows where real-time integration is not yet available.
- Compliance and audit integration with the bank's existing regulatory reporting systems.
Authentication and governance
Core banking integration runs under the bank's security and change-management framework with the core vendor's specific authentication patterns. Regulatory compliance (FFIEC guidance, FDIC/OCC examination requirements) shapes the integration approach.
When core-banking modernization pays off
For regional FIs facing competitive pressure from digital-native banks, customer-experience modernization without core replacement is typically the right trajectory — core replacement is a multi-year, multi-million-dollar project that many FIs cannot justify economically. The TWSS WaveSols Banking pattern delivers modern UX, KYC integration, and workflow modernization on top of the existing core without replacement risk.