Modernization Strategy
Why modernization is not simply refactoring, and how to choose the right path.
Sylvain Leroy
Cloud & Application Modernization Architect
I help software companies, banks and enterprise teams migrate, modernize and optimize complex platforms across AWS, GCP and cloud-native environments.
20+ years in software modernization · AWS & GCP certified · SaaS, banking, insurance and enterprise platforms
Cloud and Application Modernization
Field notes on cloud & modernization
I write about cloud migration, modernization strategy, legacy transformation, architecture complexity, performance optimization and the real-world constraints of enterprise IT.
Architecture & Resilience
How complexity impacts RTO, operations and business continuity.
Why RTO explodes when architecture complexity grows
Read the articleCloud Engineering
Practical lessons from AWS, GCP, data platforms and cloud-native systems.
Performance optimization for AWS Glue using Microsoft SQL Server Spark connector
Read the articleAI Agents
Building an AI-powered diagnostic agent for real-world industrial equipment.
How to build an AI-powered diagnostic agent for industrial equipment
Read the articleLegacy Modernization
Strategies for moving PowerBuilder applications into the cloud era.
Modernizing PowerBuilder Applications: Strategies for the Cloud Era
Read the articleHybrid Cloud
Monitoring hybrid VPN connectivity between Azure and AWS in production.
Monitoring Hybrid VPN Connectivity Between Azure and AWS
Read the articleFrom the blog
Latest articles
Fresh field notes on cloud, modernization, data engineering and AI — published as I go.
ai
What Is an AI Agent? A Field Definition and Five Common Patterns
Read the articlesoftware-architecture
Event Storming for Complex Domains: A Practitioner's Field Guide
Read the articlesoftware-architecture
Application Modernization in the Age of AI: The Framework Hasn't Changed — the Speed Has
Read the articlesoftware-architecture
Building a Modernization Index: How to Measure Cloud Transformation Progress
Read the articlesoftware-architecture
Technical Speaking: Common Messaging Mistakes and How to Avoid Them
Read the articlesoftware-architecture
From Excel to Production: Using AI Coding Assistants to Convert Spreadsheets into Python Applications
Read the articleGallery
Moments from the field
Ready to start?
Need help modernizing a platform, preparing a cloud migration, or reviewing your architecture?
Let's talk about your platform, your constraints, and where AWS, GCP or cloud-native architecture can move the needle.
Get in Touch