OpenCart Developer in Chennai for Custom Modules, Bug Fixes & Speed

1. Two extensions fighting over the same file

When two plugins both try to change the same core controller (commonly catalog/controller/checkout/checkout.php) using vQmod or OCMOD, the conflict often fails silently. The admin dashboard loads fine, but checkout breaks for customers. I trace this by going through your logs and installed extensions directly, rather than reinstalling everything and hoping the problem goes away.

2. Hosts force a PHP version upgrade

GoDaddy, Hostinger, and similar hosts periodically push PHP upgrades (7.4 to 8.1+, for example) for compliance reasons, without asking. Older OpenCart 2.x installs and their extensions often weren't written for the stricter newer PHP, so you get a blank page or a 500 error overnight with no warning. I go through the codebase and fix the compatibility issues directly, so you don't have to rebuild the store just because the host changed something.

3. The catalog outgrows the database setup

Once a catalog passes a few thousand products, unindexed queries and bloated log tables start showing up as real page-load delays — sometimes 6-12 seconds on mobile. I fix this by optimizing the slow queries, adding missing indexes on tables like oc_product_to_category, and setting up proper caching so the same lookups aren't repeated on every page view.

4. Payment goes through but the order doesn't show up

If a customer pays but the order never appears in your admin, the webhook call from the payment gateway is usually failing quietly — often an SSL certificate issue, a wrong callback URL, or mod_security blocking the request. I fix this by checking server headers directly and tracing exactly where the call is failing, for gateways like Razorpay and Instamojo.

Note: These are typical ranges, not quotes. You'll get an exact estimate after a free review of your store's extensions, hosting limits, and customization history.

Core Web Vitals. This means removing render-blocking scripts, deferring tracking tags that aren't needed immediately, and setting explicit image dimensions — the specific things Google's LCP and INP metrics actually measure.

Server-side caching. Caching expensive database query results so OpenCart isn't re-running the same lookups every time someone loads a popular category page.

Image compression. Converting product images to .webp, setting up lazy loading, and serving properly sized images instead of full-resolution files scaled down in the browser.

Database cleanup. Clearing old session logs, archiving stale search data, and indexing the tables that actually get queried on every page load.

Journal (3 and 4). Journal is effectively its own page-building layer sitting on top of OpenCart, with its own settings tree and layout definitions. Change something without understanding how Journal structures it and you can break checkout or tank load times without an obvious cause. I make block and slider changes inside Journal's own layout system rather than overriding core files, so the changes survive the next Journal update.

Poco. Poco runs on the MazaEngine component system and leans on cron jobs to keep catalog layouts and filters in sync. When a Poco store suddenly slows down, it's usually a failed cron job or a caching conflict at the theme level — not a server problem. I fix the Twig templates and background jobs directly rather than guessing at plugin settings.

Being based in Chennai, Tamil Nadu means we work in the same hours. When checkout breaks during your morning sales rush, you get a reply in minutes — not a response from an outsourced queue the next day.

I work with stores across Anna Nagar, Velachery, Adyar, Guindy, Ambattur, Porur, and OMR, and I'm familiar with the Indian payment gateways and delivery services most Chennai stores actually integrate with.

I'm also available across Tambaram, Avadi, Chromepet, Perambur, KK Nagar, Ashok Nagar, Sholinganallur, and Medavakkam — and remotely for businesses in the Middle East, Europe, and the US, entirely over WhatsApp and email.