Job Summary
Senior Full-Stack Web Developer
PHP, CodeIgniter 3, E-commerce & AI-Assisted Development
Company: Digital World Click
Employment Type: Full-time, in-house
Schedule: Evening shift, Monday to Friday
Office Location: Mashreq Center, Gulshan-e-Iqbal Block 14, Karachi
Salary: Negotiable based on experience
About the Role
Digital World Click is looking for an experienced Senior Full-Stack Web Developer to maintain and modernize a large e-commerce platform built with PHP, CodeIgniter 3, and MySQL.
This is a hands-on senior role for someone who can work confidently with legacy systems, build reliable third-party integrations and improve existing code without disrupting live operations. You should also be comfortable using AI coding tools while applying careful human review, especially to code involving payments, authentication and sensitive data.
Roles And Responsibilities:
- Maintain, troubleshoot, and gradually modernize a mature CodeIgniter 3 application.
- Refactor legacy PHP code safely while protecting live production systems.
- Develop and improve e-commerce checkout flows, webhooks, cron jobs and background sync processes.
- Build and maintain integrations with payment gateways, shipping and fulfilment services, marketplaces and marketing platforms.
- Support integrations such as Stripe, PayPal, Braintree, Square, Printful, ShipStation, Shopify, eBay, Amazon, Klaviyo and HubSpot.
- Optimize MySQL queries, data models and indexes, and identify performance issues such as N+1 queries.
- Improve frontend features using HTML, CSS, JavaScript, jQuery and Bootstrap.
- Use AI-assisted development tools such as GitHub Copilot, Claude, Kiro or ChatGPT to speed up routine work and support refactoring.
- Review AI-generated code carefully and follow secure development practices.
- Conduct code reviews, document technical decisions, and mentor other developers.
How to Apply
Please send your CV and portfolio or examples of relevant work. Include a summary of your CodeIgniter 3 experience, e-commerce integrations, and AI development tools you use.
Required Skills
Skills And Qualifications:
- Strong professional experience with PHP and MVC frameworks, especially CodeIgniter 3.
- Experience working with legacy PHP applications and modern PHP versions.
- Advanced MySQL skills, including query optimization, indexing and data modelling.
- Good command of HTML5, CSS3, JavaScript, jQuery and Bootstrap.
- Practical experience with APIs, webhooks, cron jobs and asynchronous data synchronization.
- Experience integrating third-party services such as payment gateways, shipping platforms, marketplaces or marketing tools.
- Familiarity with Git and established software development workflows.
- Strong problem-solving skills and a careful approach to changes in live systems.
- Clear communication skills and ability to explain technical decisions to non-technical team members.
- Experience with Shopify, eBay or Amazon integrations.
- Experience with Stripe, PayPal, Braintree, Square or similar payment systems.
- Familiarity with AI-assisted development workflows and tools such as Kiro, Claude or GitHub Copilot.
- Experience with automated testing, credential scanning, migration generation, or other development guardrails.
- Experience mentoring junior or mid-level developers.