Brownfield Systems

We move business-critical legacy systems onto a modern stack — one increment at a time, each one reversible, with no feature freeze. Most clients arrive with the same problem. The system still makes money. The people who wrote it have left. Most of the engineering budget keeps it alive instead of moving it forward. And every proposal on the table starts with a rewrite and a year of frozen feature work. Every engagement starts with a fixed-price legacy audit: two to three weeks, and you get a system map, a risk register, a recommended migration path with the alternatives we rejected and why, a sequenced plan, and estimates per increment. You own the document. If you take it to another vendor or run the migration in-house, it still stands on its own. WE MIGRATE FROM PHP — Symfony, Laravel, Yii, Zend, CodeIgniter, no framework Java — Spring 3/4, Struts, JSF, EJB, WebLogic, WebSphere .NET Framework — WebForms, MVC 4/5, WCF Ruby on Rails 3–5 · Python 2, Django 1.x · Node.js pre-ES6 · AngularJS 1.x WE MIGRATE TO TypeScript — Node, NestJS · Go · Java, Kotlin — Spring Boot · .NET 8+ Python — FastAPI, Django · React, Next.js, Vue, Svelte PostgreSQL, MySQL, managed cloud databases · AWS, GCP, Azure or your on-prem We do not preset your target stack. A firm carrying a fixed bench has to recommend whatever keeps that bench busy; we allocate against your system instead. Sometimes the honest answer is to leave a system alone. When that is the case, the audit says so, and you have paid a small fixed fee to avoid a large mistake. brownfieldsystems.com