Architecture

Design patterns for Azure Data Factory and Microsoft Fabric pipelines: metadata-driven, parameterized, idempotent, and observable.

Decompose CL (Control Language) programs and job streams into modern orchestration — Spring Batch, Step Functions, Airflow, or message-driven architectures.

Modernize a legacy ASP.NET WebForms or MVC web app to an Angular SPA + modern .NET, using the strangler fig pattern for incremental migration.

Build or modernize a cloud data platform on Azure: ADF/Fabric pipelines, PySpark transformations, Synapse/Fabric warehouse, BI consumption, and data governance.

Break legacy JCL job streams into modern batch (Spring Batch / .NET Worker) or event-driven architectures, preserving sequencing and dependencies.

Modernize COBOL applications via the four canonical strategies (replatform, refactor, rewrite, replace) — with a deep walkthrough of the rewrite path most projects need.

Migrate legacy ETL tools (Informatica, SSIS, DataStage, Pentaho) to Azure Data Factory + Microsoft Fabric + PySpark with parity validation and incremental rollout.

Flagship migration skill that walks Claude Code through audit → strategy → slicing → cutover for any legacy system migration.

Comprehensive risk inventory for migration projects with likelihood, impact, mitigations, and triggers.

Modernize RPG / AS/400 / IBM i apps via the four strategies (replatform on PowerVS, refactor, rewrite, replace) — with a deep walkthrough of the rewrite path most projects need.

Plan an incremental migration where new code gradually replaces legacy, with both running in parallel during the transition.

Generate a STRIDE threat model from an architecture or feature description: assets, trust boundaries, threats, and mitigations.

Migrate a legacy VB.NET WinForms desktop application to a modern web SPA (React or Angular) + .NET API. The hardest scenario — it's an architectural reshape, not just tech translation.