Walter Technologies
Application Modernization

Modernize what works. Replace only what doesn't.

We work inside existing business-critical applications — upgrading frameworks, APIs and infrastructure without forcing a costly full rewrite.

Request an Application Assessment
The problem

A full rewrite is rarely the right answer.

Legacy PHP and CodeIgniter applications often still run the core of a business — the risk isn't the old code, it's an all-or-nothing rewrite that stalls for a year.

We assess what's actually broken versus what's simply old, and modernize incrementally so the application stays in production throughout.

What we deliver

01

Legacy PHP Modernization

Incremental upgrades from PHP 5/7 codebases to current, supported versions.

02

CodeIgniter Modernization

Framework upgrades or migration paths off end-of-life versions.

03

API Enablement

REST APIs layered onto applications that never had one.

04

Database Optimization

Indexing, query tuning and schema fixes for real performance gains.

05

Cloud Migration

Moving from on-premise or shared hosting to managed cloud infrastructure.

06

Security Improvement

Closing the gaps that accumulate in unmaintained applications.

Capabilities

Legacy PHP modernization
CodeIgniter upgrades
PHP upgrades
API transformation
Cloud migration
UI modernization
Database optimization
Security improvements
Performance improvements
Automated testing
CI/CD
AI enablement

Typical use cases

End-of-life framework

An application running on a CodeIgniter or PHP version no longer receiving security updates.

Performance under load

A system that was fine at low usage but degrades as customer or data volume grows.

No API layer

A monolithic application that now needs to talk to a mobile app, a partner, or an AI layer.

How we work

01Assess
02Plan
03Modernize
04Test
05Deploy
06Support
Technology we build with
PHPLaravelCodeIgniterMySQLAWSDockerGitHub Actions

Frequently asked questions

Do we need to stop using the application during modernization?+

No. We modernize incrementally specifically so the application stays in production throughout the engagement.

How do you decide what to rewrite versus keep?+

Through a technical assessment upfront — we identify what's actually causing risk or limiting growth, and leave the rest alone.

Start a conversation

Ready to talk about application modernization?

Tell us what you're building or automating. We'll help you determine the right technical approach.