The problem we usually inherit
The system still makes money. New engineers take weeks to become useful. File drops and stored procedures hold critical integrations together. A full rewrite is politically attractive and operationally dangerous.
How we modernize
- Monolith decomposition roadmaps with explicit seams, not a slide titled “microservices”
- ASP.NET → .NET / ASP.NET Core or Blazor paths chosen against team skill and runtime risk
- ERP and partner exchanges moved from files to reliable APIs where it actually reduces incidents
- Standards, ADRs, and Dockerized local setup so the next hire is not starting from folklore
What “done” looks like
A maintainable architecture your team can extend, with production support practices in place. On one billing platform we reduced new-engineer onboarding time by 70% through component standards, review culture, and better documentation — while the system continued serving ~100,000 API requests a day.
Related outcomes are on the work section. For metering or shopfloor systems, see utility billing & AMI and manufacturing integrations.