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Miguel CoronelChief Technology Officer
← All transformations

Mexican multi-bank institution

Digital Banking Platform

Greenfield · BIAN-aligned · Production

Status·Production

A seven-layer BIAN-aligned banking architecture, industrialised into a repeatable API and service delivery capability operated by multidisciplinary teams. In production as of September 2026.

  1. Architecture
  2. →Industrialization
  3. →Multidisciplinary teams
  4. →Repeatable delivery capability
  5. →Production

Role: Platform Architect

161Microservices in a banking platformgreenfield digital banking platform, in production
249APIs in a banking platformgreenfield digital banking platform, in production
378Platform componentsgreenfield digital banking platform, in production
35Business capabilitiesgreenfield digital banking platform, in production
Banking platform in production in Sep-2026greenfield digital banking platform, in production

Context

A bank required a new digital banking platform with domain boundaries, integration standards and a scalable operating model.

Tension

The architecture needed to support a large service landscape without collapsing responsibilities into channel logic or direct core coupling.

Scope

A seven-layer banking architecture aligned to BIAN, separating experience, BFF, orchestration, domain, adapters, integration and core concerns.

Architecture

BIAN-aligned domains, contract-first APIs and event-driven patterns, with layer-specific error handling, observability and resilience defined as platform standards rather than per-team choices.

Result

Platform in production as of September 2026.

Lessons

Separating the layers at design time is what makes the service count sustainable: without explicit boundaries a landscape this size converges on channel logic.

Evidence status

Supported: every figure above traces to an internal document, artifact or record. Outcomes not yet measured are deliberately absent.

Supported