Regional leasing firm · Legacy to AI-native

The context

The leasing firm operated on a core built in the early 2000s, patched over two decades. Generating regulatory reports relied on manual exports that took three to five days per request. The monthly accounting close required 15 days from the finance team before results could be consolidated for the board.

The project was triggered by an external-audit observation on traceability of leasing approval decisions. Management decided it was time to migrate — without stopping origination or losing operating history.

How we approached the problem

A layered migration strategy with coexistence: the legacy core remained as the system of record throughout the transition while the new AI-native stack absorbed processes by domain. Orchestration of Anthropic Claude, OpenAI GPT-4 and Google Gemini for reconciliations, multi-model credit scoring and executive reporting.

PHASE 01 · Month 1

Architectural audit and coexistence plan

Complete map of the legacy core: dependencies, integrations, critical batches. Event bus design for coexistence and cutover plan by domain.

PHASE 02 · Month 2

Automated reconciliations with Claude agents

Bank reconciliation pipeline with document extraction and contextual matching. Reduction in manual reconciliation time by more than two-thirds from the first week in production.

PHASE 03 · Month 3

Multi-model scoring and parameterizable credit policies

Replaceable scorecards without touching code, A/B testing in production and Claude + GPT-4 + Gemini orchestration for complex case evaluation.

PHASE 04 · Month 4

Accelerated accounting close and executive dashboards

Close automation: provisions, accruals, consolidated financial reports. Executive dashboards with LLM-driven explainability. Monthly close from 15 to 3 days.

PHASE 05 · Month 5

Regulatory traceability and full go-live

Immutable log of approval decisions, signed electronic files, updated manuals. Total cutover with the legacy core in read-only mode. Start of DTX Retainer™.

Measurable results

• Monthly accounting close reduced from 15 days to 3 days.
• Bank reconciliations with −72% finance team hours per month.
• Complete traceability of approval decisions, ready for external audit and CNBV.
• 2.4× origination capacity with the same commercial team thanks to the accelerated scoring engine.
• Operating history migrated to the new stack without information loss or commercial service interruption.

“We went from closing the month in two and a half weeks to closing in three days, and the external audit closed without traceability observations. The migration did not stop origination for a single day.”

— Finance Director, regional leasing firm · reference under NDA