Zain Hassan Zain Hassan Integration & automation engineer
Web integration & automation engineer

I Build, Connect & Automate Business Websites

WordPress and WooCommerce engineering, AI chatbots and workflow automation, CRM integrations, and server-side tracking that actually works — for agencies and growing businesses. Backed by 100+ five-star reviews. Start with one small task, no retainer required.

What I do

Build, connect, automate — one engineer across your whole stack.

From WordPress and WooCommerce engineering to AI automation and accurate tracking — sold as outcomes with clear scope, not hours on a clock.

AI & Automation

AI Chatbots & Assistants

Lead-qualifying AI chat trained on your own content, wired to booking, CRM, and email — built on OpenAI and Claude APIs.

AI & Automation

Workflow Automation

n8n, Make, and Zapier workflows: forms to CRM, AI lead scoring, Slack and WhatsApp notifications, and content pipelines.

Measurement

Tracking, Consent & CAPI

Server-side GTM, Consent Mode v2, GA4, and Meta, Google, and LinkedIn conversion APIs — accurate data your ad spend depends on.

Engineering

Forms, APIs & CRM Integrations

Custom forms, file uploads, AJAX submissions, HubSpot, Salesforce, webhooks, and REST API flows.

Engineering

WordPress & WooCommerce Engineering

Custom plugins, Elementor widget systems, checkout and product logic, and WordPress AI Client integrations.

Engineering

Builds, Fixes & Speed

Design-to-Elementor builds, PHP/JS debugging, Core Web Vitals, plugin conflicts, and urgent production support.

AI & automation

Your website should work while you sleep.

Most businesses lose leads between the form and the follow-up. I connect your website to AI, your CRM, and your communication tools — so every enquiry is answered, scored, and routed automatically. Same integration engineering behind my 100+ five-star reviews, applied to the systems that grow your revenue.

  • AI chatbots trained on your business content — answering, qualifying, and booking 24/7
  • Lead pipelines: form → CRM → AI scoring → email, Slack, or WhatsApp follow-up
  • WhatsApp Business API flows for support and sales
  • AI content operations: drafts, summaries, and product data at scale
  • WordPress AI Client and Connector integrations (WP 7.0+)
  • Built with n8n, Make, Zapier, and the OpenAI and Claude APIs
Why agencies work with me

Reliable technical support without changing your client relationship.

Agencies usually contact me when they have client work ready but need reliable technical support behind the scenes.

  • I work under your agency name
  • I do not contact your clients directly
  • I can sign an NDA
  • I follow your workflow and tools
  • I give simple progress updates
  • I can work per task, per project, or monthly
  • I understand design accuracy and clean implementation
How it works

Simple process, staging-first delivery.

Designed to fit your existing tools and approval flow, from one urgent fix to long-term support.

  1. 01

    Send the task

    A brief, design file, staging link, or a quick Loom — whatever you already have is enough to start.

  2. 02

    Scope confirmed

    You get a fixed cost and timeline in writing before any work begins. No surprises later.

  3. 03

    Built on staging

    Everything is developed on staging or your preferred setup — nothing touches your live site unapproved.

  4. 04

    You review

    Check the work internally at your pace. Feedback rounds are part of the process, not an extra.

  5. 05

    Revisions & handoff

    Final polish plus clear handoff notes your team can actually follow.

  6. 06

    You go live

    Ship it to your customers — or to your client under your agency brand, with full credit to you.

Real agency work

Problems I've solved for agencies like yours.

Every project starts with an agency that needs reliable execution — here's how I delivered.

Elementor Development

Design-to-Elementor Widget System

Challenge

An agency had a Figma-approved design system but their developers couldn't convert it into reusable Elementor components — causing delays on every new client site.

What I Did

Built 12+ custom Elementor widgets with full content, style, and responsive controls — matching the Figma designs pixel-for-pixel.

Outcome

New client pages now take hours instead of days. The agency reuses the widget library across projects.

WooCommerce

WooCommerce Checkout Rescue

Challenge

A client's WooCommerce store had a broken checkout flow — abandoned carts, plugin conflicts, and the agency had a hard launch deadline in 48 hours.

What I Did

Identified 3 conflicting plugins, rebuilt the checkout fields, fixed cart calculations, and added custom validation for the payment gateway.

Outcome

Store launched on time. Checkout completion rate jumped after the fix.

API & Integrations

CRM Lead Flow Automation

Challenge

Leads from WordPress forms were being manually exported to HubSpot and Salesforce — causing data loss and delayed follow-up for the agency's client.

What I Did

Built real-time API integration with field mapping, validation, error logging, and automated CRM record creation on form submission.

Outcome

Zero manual data entry. Leads appear in CRM within seconds of form submission.

Tracking & Analytics

GDPR-Compliant Tracking Stack

Challenge

An EU-focused agency needed consent-aware tracking across 6 client sites — but their current GTM setup was firing tags before consent, risking GDPR fines.

What I Did

Rebuilt GTM containers with consent mode v2, configured CookieYes integration, set up server-side tagging, and wired LinkedIn CAPI + Google Ads conversions.

Outcome

Full GDPR compliance while maintaining accurate conversion measurement across all campaigns.

Speed & Bug Fixing

Multi-Site Performance Overhaul

Challenge

An agency had 4 client sites with Core Web Vitals failures — slow load times, layout shifts, and render-blocking resources threatening their SEO rankings.

What I Did

Audited each site, optimized images (WebP), eliminated render-blocking CSS/JS, configured caching, and fixed PHP errors causing slowdowns.

Outcome

All 4 sites passed Core Web Vitals. Average page load dropped significantly.

Custom Development

Custom Registration & API Flow

Challenge

A Webflow site needed a multi-step registration flow with conditional logic and external API calls — beyond what native Webflow could handle.

What I Did

Built a custom JavaScript form engine with step validation, API endpoint integration, field mapping, and admin-friendly documentation for the agency team.

Outcome

Smooth user registration experience with zero technical complexity exposed to the end user.

Have a similar challenge? Let's talk about how I can help your agency.

Send Me Your Task
Product proof

I don't just build for clients — I ship my own product.

ZHBackup is a full-site WordPress backup, restore, and migration plugin I designed, built, and maintain — published on WordPress.org and reviewed by the official plugin team. Every client project gets the same engineering standard.

  • Full-site backup, restore & migration
  • Scheduled automatic backups
  • Restores that retry and resume after network drops
  • Structured database packages + safe Find & Replace
  • GPL v2 · PHP 7.4+ · WordPress 5.8–7.0
  • Version 2.4.0 — actively maintained
White-label promise

Your client stays your client.

I work quietly behind the scenes as your technical development partner.

  • No direct client contact unless requested
  • NDA-friendly
  • Agency-branded delivery
  • Clean handoff notes
  • Staging-first workflow
  • Long-term support available
Packages & pricing

Fixed prices. Clear scope. Start with one task.

Tracking Rescue & Setup

Tracking audits and fixes from $400. Server-side GTM, Consent Mode v2, and conversion APIs from $750.

WordPress & WooCommerce

White-label overflow development from $15/hr. Custom plugins, widget systems, and builds at fixed quotes.

Every project is quoted fixed before work starts — no retainer, no minimum commitment. White-label agency overflow support still starts from $15/hr, and agencies can resell any package under their own brand.

100+ five-star reviews

Don't take my word for it.

Real feedback from agencies, founders, and dev teams I've worked with on Fiverr and beyond.

Zain is a great guy and freelancer. I trust him and his work speaks for itself. A+
A
andrewxyb 🇺🇸 US · WordPress
Zain went above and beyond. He takes the time to understand your needs so he can do his part correctly. If you need to turn your HTML files into Elementor widgets, he's the guy to do the job. Don't hesitate to work with him.
O
osmosblack 🇺🇸 US · Themes/Plugins
Fantastic job. Even if I wanted to find something to criticize, I couldn't think of something. Did everything in a fast manner, did good quality work, fixed bugs, improved page, updated concrete cms, good communication. Will hire again if needed anytime.
D
dominicbuche127 🇨🇭 CH · Bug Fixes
Zain is my go to... Always have had great experiences working with him. Plan on using in the future!
A
andrewxyb 🇺🇸 US · WordPress
This was one of the best gigs. He delivered in an incredible amount of time as well! Very reasonable budget and was an incredible experience — he went above and beyond.
J
josephbenstowe 🇺🇸 US · Themes/Plugins
Excellent job and Zain is wonderful to work with. Highly recommended!
L
lorieca 🇺🇸 US · WordPress
I was looking for someone to help improve my website and Zain has done a brilliant job. He migrated it from a .co.uk to a .com and was so knowledgeable and kept me informed every step of the way. Over the last few months Zain has undertaken multiple jobs on my website and has improved its functionality.
L
lynsey_jackson 🇬🇧 GB · WordPress
I've been working with Zain on a few projects now to improve my website and I am so happy with the results. Zain has a real understanding of WordPress and is able to not only complete the work, but offer advice and give suggestions as to what would help make the website better.
L
lynsey_jackson 🇬🇧 GB · WordPress
Very professional, quick turnaround.
D
dhillonw 🇺🇸 US · Themes/Plugins
I am so pleased that I found Zain to help me with my website. He went above and beyond to help me. He has great knowledge of WordPress and was able to help and advise me on improving my website and fixing issues the website had. I would definitely recommend Zain to anyone.
L
lynsey_jackson 🇬🇧 GB · WordPress
Zain has been helping me optimise my WordPress website to make it faster. He has a great level of understanding and has helped improve the speed and also offer alternative plugins and hosting options to speed it up more, which I really appreciate.
L
lynsey_jackson 🇬🇧 GB · Speed Optimization
Excellent job. Communicated very well and is extremely knowledgeable. Highly recommend.
A
andrewxyb 🇺🇸 US · Themes/Plugins
Great responsiveness, work delivered ahead of schedule and very high quality work, I recommend!
C
chill_again 🇫🇷 FR · Themes/Plugins
Absolutely amazing work! The developer handled the entire Taboola S2S conversion tracking integration with precision and deep technical understanding. He was proactive, communicated clearly, and delivered everything on time.
S
scytheop 🇮🇳 IN · Tracking / S2S
Working with Zain was a great experience. He handled the website migration smoothly and professionally, always available to answer questions and solve issues quickly. Everything was delivered on time and with great attention to detail.
J
joeburanko_ 🇮🇹 IT · Migration
Working with Zain has been an absolute pleasure. He delivered a flawless customization for our website, perfectly aligning with our requirements. His attention to detail, technical expertise, and responsiveness made the entire process smooth and efficient.
J
joeburanko_ 🇮🇹 IT · WordPress
Excellent experience! The customization was executed with impeccable attention to detail and care. The final result exceeded expectations, perfectly combining quality, aesthetics, and functionality. Clear communication, timely delivery, and great professionalism.
J
joeburanko_ 🇮🇹 IT · Customization
Had a fantastic experience getting my Pixel installed on my website. Zain helped me through the process and was incredibly polite and demonstrated a deep understanding of the installation process. He is patient, answered all my questions thoroughly, and made the entire process smooth and stress-free.
S
senpaixd603 🇮🇳 IN · Tracking / Pixel
Outstanding experience! Working with Zain was an absolute pleasure! He is an incredibly skilled professional who went above and beyond to deliver exceptional results. His deep understanding of the task, attention to detail, and ability to solve complex issues with ease were truly impressive.
J
joeburanko_ 🇮🇹 IT · Themes/Plugins

Need an engineer who can build it, connect it, and automate it?

Send me one small task first — a fix, a workflow, a tracking audit. Fixed quote, no retainer. Test the work before trusting me with more.

Start small

Send a task your agency needs handled.

Share the brief, staging link, design file, or issue details. I will review the scope and reply with the next step.

You'll get a reply with scope and a fixed quote — no spam, and your details are never shared.

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