Osclass Technical SEO Overhaul

PROJECT SUMMARY – Technical SEO Fixes for Osclass Classifieds Website

My classifieds site runs on the Osclass platform, and its technical health is now limiting organic growth. Multiple issues across crawlability, indexing, architecture and performance require a specialist who can work directly inside Osclass templates, core files, and server configuration.

The priorities are clear:

• Improve the overall site architecture so Google and Bing can reliably reach and index every important page without wasting crawl budget on duplicates, filter URLs or technical pages.
• Increase crawl efficiency by fixing redirect chains, resolving canonical/noindex conflicts, tightening robots.txt rules, and generating a clean, valid XML sitemap index with properly structured gzip sitemaps.
• Raise page-speed and Core Web Vitals, addressing server response time, CSS/JS minification, jQuery cleanup, caching, lazy loading, preloading critical assets, and modern image formats.

Search Console already reports issues such as:

faulty redirects

conflicting canonical vs. noindex behaviour

duplicate or parameter-based URLs being indexed

poor metadata and heading hierarchy

slow performance metrics and layout shifts

Because of that, the job starts with a focused technical audit, not general surface-level optimisation.

Deliverables I Expect
1. Technical Audit (Clear, Actionable, Concise)

Identify:

every structural issue with URLs, pagination, categories, locations and listing pages

canonical tag errors and search/filter duplication

sitemap/robots inconsistencies

broken redirects, chains, loops

metadata/title/H1 issues

JavaScript/CSS performance problems

Core Web Vitals blockers

Schema markup gaps
Each item must include: problem → root cause → recommended fix.

2. Implementation of Fixes

Direct updates to:

Osclass theme templates (PHP + HTML)

core files if required (responsibly, with backups)

.htaccess / Nginx config for redirects and canonical enforcement

robots.txt and XML sitemap index + gzip sitemaps

minified and combined CSS/JS, jQuery updates, removal of duplicates

structured data (JSON-LD) for listings, categories and breadcrumbs

image optimisations (lazy loading, WebP/AVIF, correct alt tags)

filter URL handling (noindex,follow + proper canonicals)

clean URL structure for locations and listings

mobile UX improvements (e.g. sticky post-ad button)

3. Post-Implementation Report

Confirm:

all redirects resolve correctly (no chains/loops)

sitemap index is valid and Search Console accepts it

robots.txt is clean and does not block needed pages

duplicate and soft-404 URLs removed or redirected

canonical tags are consistent and aligned with SEO best practice

metadata and heading hierarchy fixed site-wide

Core Web Vitals improved (LCP, CLS, TBT)

category, location and listing pages are index-ready

filter URLs no longer appear in index

schema markup validates successfully

Required Skills

You must be comfortable with:

Osclass (PHP-based) architecture

modifying theme templates and search/category/item pages

Apache/Nginx redirects & rewrite logic

Core Web Vitals

Screaming Frog, PageSpeed Insights, Google Search Console

structured data, canonical logic, sitemap design

This is a focused, high-impact assignment—not just “install an SEO plugin.”
If you can stabilise Osclass SEO foundations and eliminate structural issues, we can also discuss an ongoing optimisation phase afterward.