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Hi, I have an educational web application currently built with: Backend: PHP 5, CodeIgniter 3 Database: MySQL 5 Frontend: HTML, CSS Scripting: JavaScript, jQuery, Ajax I’m looking for a technical specialist who can: Fix existing issues / bugs in the application Upgrade the technology stack (as needed) to modern, stable versions Test the application thoroughly and resolve any resulting problems Make required code and configuration changes to ensure everything works smoothly Support future work—I plan to add AI plugins later, so experience with AI integrations is a plus. Key Requirements Strong experience with CodeIgniter 3 and PHP Good knowledge of MySQL and database migrations Ability to analyze, debug, and refactor legacy code Experience with testing and deployment Communication in English (clear updates/progress) Deliverables Working application after fixes and upgrades Documentation of changes made (at least brief) Test report / list of key test cases performed If you’re confident you can handle this, please apply ASAP with: Your relevant experience (links/portfolio if available) Your estimated timeline and cost Your proposed upgrade approach (brief) Thank you.
Project ID: 40487378
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97 freelancers are bidding on average ₹23,277 INR for this job

Hello! I would be happy to help modernize and stabilize your educational web application. I have experience working with legacy PHP applications, CodeIgniter, MySQL migrations, bug fixing, code refactoring, testing, and deployment. My approach would be to first audit the existing application, identify critical issues and compatibility risks, then create a structured upgrade plan to move the system to a more secure and maintainable environment. The process would include bug fixing, database review, code refactoring, upgrade testing, deployment support, and documentation of all changes made. I can also keep future AI integration requirements in mind while restructuring the application. I am available to start immediately and would be happy to discuss the project in more detail. Best regards,
₹12,500 INR in 5 days
8.1
8.1

I have extensive experience with CodeIgniter 3 and PHP, and I've successfully upgraded and debugged legacy PHP applications like yours. My approach: first audit the existing codebase to catalog all bugs and deprecated code, then upgrade PHP to a stable modern version (8.1+), update CodeIgniter 3 dependencies, migrate the MySQL schema safely, and run thorough testing across all modules. I'll deliver a working application with documented changes, a test report, and clean upgrade notes. I also have experience integrating AI/ML plugins into PHP apps, so I'm well-positioned for your future AI enhancements too. Can you share access to the app or describe the most critical bugs? Let's get started. Regards, Harsh Thoriya
₹35,000 INR in 7 days
8.3
8.3

Hi, I can help with your "Educational Web App Upgrade and Bug Fixes" project. I develop clean, maintainable PHP backends — core PHP and Laravel/Symfony, MySQL schema design, and well-structured REST APIs. For work involving php, javascript, ajax, css, mysql, html, web development, jquery, I pay close attention to validation, security, and readable code, delivering in small, testable milestones. I provide clean commits and clear documentation. Can we discuss the specifics before I firm up the timeline? ⭐ 5.0/5 from a recent client: "Excellent work by the developer! They built my Video Trimmer website exactly as I wanted. The website is fast, user-friendly, and works smoothly. Communication was clear throughout the project, and…" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
₹30,000 INR in 7 days
7.6
7.6

Hello, I'm web developer, I have 10+ years experience in HTML, CSS, jQuery, ReactJS, ReactNative, VueJS, PHP, Laravel, CodeIgniter, API, WordPress, Joomla,.... I will provide you with the best quality and long term support. Please discuss, thank you!
₹19,000 INR in 7 days
7.6
7.6

Hello, I understand you need a full stack specialist to stabilize and modernize your educational platform while laying groundwork for AI features. The core ask is clear: audit and fix bugs in a CodeIgniter 3/PHP 5 app, then upgrade the stack to current stable versions, ensure database integrity, and keep the architecture robust for future AI plugins. My approach would be to first map the existing architecture, then apply incremental, well-tested upgrades using a LAMP/LEMP stack, CodeIgniter 3 with selective migration paths, MySQL with careful migrations, and introduce Composer and PSR standards for maintainability. For AI readiness, I’ll design endpoints and data layers that can later integrate with AI services smoothly. Given the educational context, how do you handle student data compliance and user authentication across the platform? Thanks, please get in touch, looking forward to collaborating.
₹15,000 INR in 10 days
7.6
7.6

With over a decade of experience, we at Carol Data Technology recognize the pressing need for upgrading legacy systems with modern, stable technologies without compromising on functionality or efficiency. Hence, I believe I'm the perfect fit for your project. I've journeyed long and hard in domains that align closely with your requirements: PHP (one of the major development tools for your existing backend) in conjunction with CodeIgniter and extensive knowledge in MySQL for database management to smoothen your application's performance. Additionally, my command over JavaScript and its libraries like jQuery and Ajax will assure you a seamless experience from the frontend to the backend. A testament of my expertise is showcased through my competence in analyzing, debugging, and refactoring legacy code to maintain consistency while implementing new features. My association with another education-oriented platform helped me develop an understanding of the delicate balance that this sector demands: cutting-edge technology mingled with simplicity. When it comes to testing and deployment, I understand how rigorously you want your educational app to be examined. Moreover, once hired, our continued services will ensure a smooth transition of your future AI plugins into the system. I promise you daily progress reports and adaptability throughout the project.
₹25,000 INR in 15 days
7.3
7.3

Ready to bring the best out of your educational web app, I am Rajveer, a seasoned PHP developer with more than 10 years of experience. My expertise doesn't stop at PHP and MySQL though - I am well-versed in CodeIgniter, similar to your application's backend, and I have successfully debugged, upgraded and deployed legacy codes and scripts before. Not to mention my prowess in testing and deployment which will be critical for you
₹12,500 INR in 7 days
7.2
7.2

Hello, I am interested in assisting with your educational web application. With 10+ years of experience in PHP, CodeIgniter, MySQL, JavaScript, jQuery, AJAX, Laravel, and modern web application development, I have extensive experience maintaining, upgrading, and modernizing legacy systems while ensuring business continuity. I can begin by performing a detailed audit of the existing CodeIgniter 3 application to identify bugs, compatibility issues, performance bottlenecks, and security concerns. Based on the findings, I will implement the required fixes, upgrade PHP and database compatibility where feasible, refactor outdated code, and thoroughly test all modules to ensure stable operation. I also have experience integrating AI-powered features and APIs, which will help support your future roadmap for AI enhancements. The exact timeline and cost can be finalized after reviewing the application, codebase size, and upgrade requirements. I can share relevant project experience during our discussion. Best regards
₹25,000 INR in 7 days
6.9
6.9

Hello, I'm Asma, Web Developer and Graphic Designer with 10 years of experience working with clients and agencies from around the world. Creative problem solver with a passion for creating visually appealing and user-friendly digital solutions. I love building luxurious brands and designing captivating visual identities. I've worked with clients in lifestyle, property, fashion, hospitality, and luxury sectors. 24/7 Support & Faster Response . #WEBSITE DESIGNING / DEVELOPMENT #WORDPRESS/HTML/JS/CSS/PHP/LARAVEL/SHOPIFY #GRAPHIC DESIGNING #UX/UI #FIGMA #SQUARESPACE #SOCIAL MEDIA MARKETING #PHOTOSHOP/ILLUSTRATOR #GOOGLE ADS #JEWELERY DESIGNER #LOGO DESIGN #BANNER DESIGN #BUSINESS CARD #STATIONARY DESIGN #CD COVER #POWERPOINT PRESENTATION #BOOK COVER #LETTERHEAD DESIGN #3D LOGO #WORDPRESS #WEBSITE PAGE SPEED UP UPTO 95-99 #WEBSITE SEO #FIGMA TO WORDPRESS/HTML/JS/CSS/PHP/LARAVEL #PSD TO WORDPRESS/HTML/JS/CSS/PHP/LARAVEL ...... ETC :)
₹25,000 INR in 1 day
6.9
6.9

I have extensive experience working with legacy PHP applications, including CodeIgniter 3, MySQL, jQuery, Ajax, and modern PHP upgrades. I can review the existing codebase, fix current issues, upgrade the application to a more stable and secure environment, thoroughly test all functionality, and document the changes made. My approach is to first audit the application, identify compatibility issues, perform upgrades in a controlled manner, fix any resulting bugs, test critical workflows, and ensure the application is stable before deployment. I also have experience integrating AI-powered features and can support future enhancements when you're ready. I’m available to start immediately and can provide regular progress updates throughout the project.
₹15,000 INR in 3 days
6.5
6.5

Hi there, I can help you fix, upgrade, and stabilize your application. I have 15+ years of experience in PHP, CodeIgniter, and MySQL, and I also use AI in my workflow. This helps me quickly analyze legacy code, fix issues faster, and deliver high-quality results in less time and cost. Here’s how I’ll approach your project: • Fix all existing bugs and stabilize the current system • Upgrade PHP, CodeIgniter, and database step-by-step (without breaking functionality) • Refactor legacy code for better performance and maintainability • Perform full testing and provide a clear test report • Prepare the system for future AI integrations You’ll get a smooth, upgraded, and well-documented application. I can start immediately and will share regular progress updates. Let's chat, Himanshu
₹25,000 INR in 7 days
6.4
6.4

Hi, I have extensive experience working with legacy PHP applications, including CodeIgniter 3, and can help stabilise, upgrade, and modernise your educational platform. ✔ Bug Fixing & Code Review ✔ CodeIgniter 3 & PHP Upgrade Strategy ✔ MySQL Migration & Optimization ✔ JavaScript, jQuery & AJAX Troubleshooting ✔ Security & Performance Improvements ✔ Full Application Testing & Validation ✔ Deployment Support & Documentation ✔ Future AI Integration Readiness My approach is to first audit the application, identify compatibility issues, fix critical bugs, and then upgrade the stack in phases to minimize risk and downtime. Once upgraded, I will perform comprehensive testing and provide a detailed report of all changes. I'm available to start immediately and would be happy to review the codebase to provide an accurate timeline and cost estimate. Best Regards, Kumar Chauhan
₹25,000 INR in 7 days
6.4
6.4

Hi I have gone through the requirements. Good experience in creating custom web applications using Laravel framework. Will do this php/codeigniter app upgrade to laravel application which is feature rich in all aspects. I'm available to start now. Please contact for further discussions. Regards, Mohan
₹20,000 INR in 10 days
6.3
6.3

As an experienced full-stack developer, specializing in PHP and with a strong proficiency in CodeIgniter 3, your project is right up my alley. With over 8 years of experience in PHP, MySQL, JavaScript, and AJAX, I'm confident in my abilities to fix existing issues and upgrade your educational web application as required. My skills extend to debugging and refactoring legacy code, ensuring that your app runs smoothly post-upgrade. Let's upgrade and connect not just the technology but also foster long-term success together through excellent communication - as you rightly mentioned - it's all about clear progress updates! Thank you for taking the time to consider my candidacy; I look forward to speaking with you soon!
₹12,500 INR in 7 days
6.3
6.3

Hi there, I will upgrade and fix your educational app built on PHP 5 / CodeIgniter 3 with MySQL 5 and jQuery/Ajax, migrating runtime and framework to a secure supported stack while preserving existing business logic. - Upgrade PHP 5 -> PHP 7.4/8.0 (compatibility fixes) and migrate CodeIgniter 3 codebase or bridge to CI4 where required; apply MySQL 5 -> 5.7/8.0-compatible schema migrations and data checks - Fix existing functional bugs in controllers, models, and Ajax endpoints; implement unit/integration test cases and perform end-to-end QA on core user flows - Optional: prepare lightweight adapter for future AI plugin integration (API hooks, auth outline) - Risk/Quality control: backup checkpoint + staged deployment with post-fix validation and rollback plan Skills: ✅ CodeIgniter 3 ✅ PHP 7/8 & MySQL migration ✅ Legacy code refactor & Ajax troubleshooting ✅ VPS/Cloud deployment, CI/CD or staged rollout ✅ Security hardening, validation, and monitoring Certificates: ✅ Microsoft® Certified: MCSA | MCSE | MCT ✅ cPanel® & WHM Certified CWSA-2 I’m available to start immediately. Is this currently running on a live production server where you want changes applied directly, or should I use a staged/test environment first? Best regards,
₹25,000 INR in 3 days
5.8
5.8

Hi, I came across your project "Educational Web App Upgrade and Bug Fixes" and I'm confident I can help you with it. About Me: I'm a full stack developer and agency owner with over 8+ years of experience in PHP, MySQL, Web Development. , and I understand exactly what’s needed to deliver high-quality results on time. Why Choose Me? - ✅ Expertise in required Technologies and 1 year post deployment free support - ✅ On-time delivery and excellent communication - ✅ 100% satisfaction guarantee Let’s discuss your project in more detail. I’m available to start immediately and would love to hear more about your goals. Looking forward to working with you! Best regards, Deepak
₹25,000 INR in 7 days
5.8
5.8

Hello, I’m Karthik, a Full-Stack Developer with 15+ years of experience in PHP, CodeIgniter, MySQL, and enterprise web applications. I can help analyze, fix, and modernize your educational platform while ensuring stability throughout the upgrade process. My approach is to first perform a code and database audit, resolve existing bugs, then upgrade PHP, MySQL, and application dependencies in a phased manner with thorough testing at each stage. ✔ CodeIgniter 3 & PHP expertise ✔ Legacy code debugging and refactoring ✔ MySQL migration and optimization ✔ Functional, regression, and performance testing ✔ Deployment support and documentation ✔ Future-ready architecture for AI integrations Deliverables: • Fixed and fully tested application • Upgrade and deployment documentation • Test report with issues resolved Estimated timeline: 1–3 weeks depending on codebase size and upgrade scope. I have worked on CRM, ERP, educational portals, and legacy application modernization projects and can provide regular progress updates throughout the engagement. Regards, Karthik 15+ Years Experience | PHP | CodeIgniter | MySQL | AI Integration
₹55,000 INR in 7 days
5.4
5.4

Hi, I would like to grab this opportunity and will work till you get 100% satisfied with my work. I just applied after read your job posting carefully and I believe that I am good fit to your project. I'm a serious bidder. I will satisfy you with my high skills! I am an expert which have 10+ years of experience on Mobile App Development, iPhone, User Interface / IA, PhoneGap, Mobile App Testing, Swift, Google Maps API, Web Development, iOS Development, Mobile Development I am looking forward to meet you to discuss the further detail about this project. Looking forward to hearing from you. Warm Regards
₹37,000 INR in 3 days
5.1
5.1

Hello Sir, I’ve reviewed your project requirements and I’m confident I can help you build a reliable, scalable PHP-based web solution that meets your business goals. Why I’m a good fit for this project: 10+ years of professional PHP development experience Strong expertise in Core PHP, Laravel,React Js, Codeignator, Wordpress, MySQL,PostgreSQL, REST APIs Experience working with long-term clients and maintaining existing systems Test thoroughly before delivery Let’s discuss your project in detail so I can suggest the best technical approach and timeline. Looking forward to working with you. Best regards, Shashi N MCA | Senior PHP Web Developer
₹12,500 INR in 6 days
4.6
4.6

With my extensive hands-on experience in PHP, MySQL and CodeIgniter 3, I am uniquely positioned to revamp your educational web application. Having worked on similar projects in the past, I have honed my skills in fixing issues and upgrading technology stacks effectively. As a bonus, I'm also well-versed in using AI plugins which could be highly advantageous for your future plans. Throughout my career, strong communication has been at the core of my client relationships. I can update you regularly and comprehensively in clear English, making sure we're always on the same page. Moreover, my proficiency in testing and deployment can guarantee a thoroughly checked web app after fixes and upgrades are implemented. To add more value to this project, I intend to maintain comprehensive documentation of all changes made while providing efficient testing reports. With me, you can rest assured you have a fully functional web app delivered with immaculate precision. My rates are competitive but reflect the quality you can expect from me. Let's join forces and take your application to new heights!
₹12,500 INR in 7 days
3.9
3.9

Hyderabad, India
Member since Jul 26, 2014
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