Legacy systems aren't a sentimental problem. They're an operational risk and a competitive disadvantage.
PHP monoliths from 2008, Access databases that only one person knows how to maintain, or COBOL systems that your IT team is afraid to touch — legacy software limits what the business can do today. We rebuild legacy systems on modern architecture. Fixed price, phased delivery.
Business running on legacy software that's expensive to maintain, impossible to extend, and dependent on knowledge held by one or two people who could leave at any time
Legacy software creates compounding risk over time. The systems that were built in 2005 or 2010 — PHP, ASP.NET WebForms, Cold Fusion, classic ASP, FoxPro, Access — were the right tools for their time. Today, they're a liability:
Key person dependency. The system was built by a developer who may no longer be at the company or reachable. The codebase uses patterns and libraries that new developers struggle with. Every maintenance task requires the "person who knows the system."
Security exposure. PHP 5.x and older have known vulnerabilities with no available patches. The libraries in the system haven't received security updates in years. The application runs on a server that can't be patched without potentially breaking the application.
No extensibility. The legacy system was designed for the requirements of its era. Adding new features — API integration, mobile access, real-time features — requires fighting the architecture. Features that should take days take weeks.
Operational fragility. The system runs on a server that no one is sure how to migrate. The deployment process is manual and undocumented. The database hasn't been upgraded because it might break something.
Competitive disadvantage. Competitors on modern stacks ship features faster. The legacy system isn't just a maintenance cost — it's a product velocity constraint.
Legacy system rebuilt on modern architecture — same functionality, cleaner codebase, modern deployment, and the extensibility to build on top of without fear
Requirements extraction
The legacy system's functionality is documented before a line of code is written. Every screen, every workflow, every edge case — the specification for the replacement is derived from the system being replaced.
Phased delivery
The rebuild happens in phases, with the most critical functionality delivered first. The legacy system runs in parallel until each phase is validated. No big-bang cutover.
Modern stack
Next.js for the application layer, Postgres for the database, Clerk for authentication, Vercel for deployment. Maintainable by any competent developer.
Data migration
All data from the legacy database migrated to the new schema. Data cleaned and normalized during migration. Zero data loss.
Documented handoff
The new system comes with documentation. No key person dependency created in the replacement.
One honest number to start.
Fixed-scope, fixed-price. The number below is the starting point — final scope is built from your brief.
Legacy system rebuilt on modern architecture — same functionality, cleaner codebase, modern deployment, and the extensibility to build on top of without fear
Three steps, every time.
The same repeatable engagement on every project. No surprises, no mystery, no billable ambiguity.
Brief & discovery.
We send you questions, then get on a call. Output: a written scope with every step, feature, and integration listed.
Build & ship.
Fixed schedule, weekly reviews. No scope creep unless you change the scope — and if you do, we reprice it transparently.
Warranty & retainer.
30-day warranty on every launch. Most clients stay on a monthly retainer for ongoing features and maintenance.
Why Fixed-Price Matters Here
Legacy modernization scope is defined by the existing system. The scope is observable — what the legacy system does is what the replacement needs to do. Fixed price after the requirements extraction phase.
Related engagements.
A 12-year-old PHP application that nobody on the team could modify safely — rebuilt in Next.js in 18 weeks.
Read more02A Webflow + Airtable + Zapier operation replaced with a single Next.js web application.
Read more03Firebase is excellent for getting started. It's the wrong database for a serious B2B product.
Read moreQuestions, answered.
Incremental is almost always lower-risk: the legacy system continues to run during the rebuild, users aren't disrupted by a big-bang cutover, and issues in the rebuild are caught before full migration. Phased delivery with parallel operation is the recommended approach for any legacy system that can't afford downtime.
The legacy system itself is the documentation. The codebase, the database schema, and the existing screens are the requirements specification. The requirements extraction phase produces written documentation from the system itself.
Legacy rebuild: from $28k for smaller systems. Larger enterprise applications: from $55k. Fixed-price per scope.
Tell Ryel about your project.
Describe what you’re building and what outcome you need. You’ll have a written, fixed-price scope within the week.