Kenta Tanizaki

Challenge

An established store had been running on a heavily customized CS-Cart installation for years. Changes had been written directly into the core and the parent theme, with little documentation of what had been altered or why. Upgrades had been postponed repeatedly because nobody could say what would break.

What I did

• Audited the installation to establish what had actually been modified, and separated business-critical logic from incidental legacy code.
• Identified the modifications that would have been overwritten or broken by a future CS-Cart upgrade.
• Moved upgrade-sensitive customizations toward add-on-based implementations, so they would survive future versions.
• Fixed root causes rather than patching symptoms, and documented the parts that had never been written down.

Outcome

The store became upgradeable again. Changes that used to carry unknown risk turned into contained, predictable work, and the platform could keep developing instead of being frozen in place.

Challenge

A store had been getting progressively slower, to the point where pages were timing out. Because CS-Cart is self-hosted, the cause could have been the application itself, an add-on, the database, PHP, or the server, and there was no agreement on which.

What I found

Two things at once. An add-on built on CS-Cart hooks was making far more database calls than the job required, and the server's memory wasn't provisioned for that kind of database load. Either alone would have been survivable. Together they produced the timeouts.

What I did

• Rewrote the PHP-side processing so the add-on stopped issuing that volume of database calls.
• Adjusted the MySQL configuration for the workload the store actually had.
• Tuned memory management at the server level so the database had the headroom it needed.

Outcome

The store got faster because the cause was removed rather than masked. No caching layer was added on top to hide the symptom, so the fix held instead of becoming another workaround to maintain.

Context

Unlike the other examples here, this wasn't client work. I was inside the business as Web Department Manager, responsible for the CS-Cart store day to day rather than brought in for a project, and doing the implementation myself rather than briefing someone else.

Challenge

A luxury brand's store can't just stay online. A small display error, a slow page, or an awkward checkout doesn't read as a bug to a customer; it reads as the brand being careless. That standard applies every day, not just at launch.

What I did

• Owned the CS-Cart store end to end: front-end, back-end, custom functionality, integrations, and the infrastructure underneath.
• Balanced continuous improvement against the reliability a live store needs, without stopping the business to do it.
• Built and maintained the store so that operational staff could work in it daily without needing a developer for routine tasks.

Outcome

Five years of running a store where the technical side had to be invisible. That experience is the reason I look at other people's CS-Cart stores the way I do: not just whether the code works, but whether the business can live with it.