CAIXA
2024 — 2025
Domain-driven architectural definition to modernize CAIXA's critical banking platforms without interrupting regulated operations.
Implementation details are withheld under a confidentiality agreement. The case describes the architectural decision and the perceived impact, not the client's internal operations.
CAIXA's banking platforms, with high demands for availability, compliance and operational security.
Coupling and structural fragility raised the technical risk of evolving sensitive flows.
Architectural decisions
Each decision below carries an alternative that was discarded. That is the point where architecture stops being a technical preference and becomes risk control.
Decoupling started from separating business responsibilities, not from splitting the system technically into services. This avoided trading code coupling for distributed coupling, which is more expensive to reverse.
The legacy was treated as a system in operation: evolving piece by piece, with what already runs coexisting with what is being replaced, and compliance preserved at every step.
Uniform packaging across modules reduced environment variation as a source of risk, bringing production behavior closer to what is observed before promotion.
Decision criteria were made explicit and sustained over time, so the architecture could withstand team turnover and deadline pressure without being renegotiated every cycle.
Domain-driven architectural definition and technical governance for incremental modernization.
Fewer fragilities, more predictable evolution and more stable support for operations.
Regulated context, multiple legacy systems and critical integration across business areas.
We start from your current context to define the next cycle with technical clarity and safe execution.
