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My production SaaS runs on a classic LAMP stack—PHP 8, Percona MySQL, Apache, plenty of xJavaScript and some modest HTML/CSS templating. It has been stable for years, but growth is finally exposing the cracks. I’m looking for a seasoned full-stack PHP developer who can slide straight into the codebase, tighten it up, and push the product forward. The immediate mandate is to maintain and extend the existing application, not rebuild it. Three parallel tracks are in scope: • Fix the bugs users keep reporting, from edge-case errors in the auth flow to UI glitches in older browsers. • Improve performance, especially around heavy MySQL reads; query profiling and smart indexing in Percona will be critical. • Add new features we’ve planned for months—robust user authentication with role management, interactive data-visualization dashboards ([login to view URL] or similar welcome), and clean, well-documented REST APIs so partners can integrate quickly. Deliverables will be accepted when: 1. All critical and high-priority bugs in our tracker are closed with regression tests. 2. Page-load time on the main dashboard drops below two seconds under 500 concurrent users (measured with ApacheBench). 3. New auth module, visualization pages, and external API endpoints are merged into the main branch, passing our PHPUnit and Cypress suites and documented in the repo’s README. I’ll provide full Git access, a staging replica, and Slack channel. Clear, incremental pull requests are the way we’ll work. If diving into a live product and leaving it faster, sturdier, and richer in features sounds like your idea of fun, let’s talk code.
Projekt-ID: 40092074
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Merry Christmas, I am ready to start this project immediately and can work in your timezone. I have deep experience with production LAMP stacks (PHP 8, Apache, Percona/MySQL) and I’m comfortable jumping straight into a mature, live codebase without disrupting stability. My first focus will be closing the high‑impact bugs in your tracker, adding regression tests, and smoothing out browser‑specific UI issues. In parallel, I’ll profile your slow queries, add or adjust indexes in Percona, and tune the application layer to reliably hit sub‑two‑second dashboard loads under realistic concurrency. From there, I can extend the platform with a stronger auth module including roles/permissions, interactive dashboards using [login to view URL] or similar, and clean REST APIs that make partner integrations straightforward. I’m used to working with Git, staging replicas, and incremental PRs, and I document changes clearly so your team can maintain momentum long‑term. If you’d like, I can start by tackling a small set of priority bugs to establish a rhythm.
$12 USD in 40 Tagen
4,2
4,2
85 Freelancer bieten im Durchschnitt $15 USD/Stunde für diesen Auftrag

***** Full-Stack PHP Enhancement & Performance Optimization for LAMP SaaS **** Hello , How are you? I will step directly into your existing PHP 8 / LAMP codebase to stabilize, optimize, and extend the product without disruptive rewrites. The focus will be on closing critical bugs, hardening authentication flows, and fixing UI issues across legacy browsers. I’ll profile and optimize MySQL/Percona queries with indexing and caching to bring dashboard load times under two seconds at scale. New features will include role-based authentication, interactive data-visualization dashboards, and clean, well-documented REST APIs. Let’s chat…. Thanks
$8 USD in 40 Tagen
9,6
9,6

Hello, I understand you need to keep and extend a mature LAMP SaaS—PHP 8, Percona MySQL, Apache—without a rewrite, tackling edge bugs in auth, UI glitches, and performance bottlenecks, while adding robust auth with RBAC, interactive dashboards, and clean REST APIs. I will dive into your codebase, fix critical bugs with regression tests, profile and optimize heavy MySQL reads with targeted indexing, and drive performance toward sub-two-second dashboard loads under 500 concurrent users (ApacheBench). For the new features, I’ll design a secure, role-based auth module, build data-visualization pages, and expose well-documented REST endpoints, merged via incremental PRs and validated by PHPUnit, Cypress, and updated README notes. I’ll rely on full Git access, a staging replica, and your Slack channel for feedback, delivering clear, testable steps and measurable progress. Would you confirm the top three priorities among: bug triage, performance tuning, and the feature set (RBAC, dashboards, REST APIs), and share any non-negotiable security or compliance constraints for the new modules? Best regards,
$25 USD in 33 Tagen
9,2
9,2

I have extensive experience in PHP, JavaScript, CSS, Apache, and MySQL, making me a perfect fit for the "Full-Stack PHP App Enhancements" project. I am confident in my ability to address the bugs, improve performance, and add new features as per your requirements. I am open to adjusting the budget after discussing the full scope of the project. I am eager to dive into the codebase and deliver the enhancements you need. Please go through my profile its 15 years old see the work I did over the years. No Win No Fee means that your satisfaction is my utmost priority. Lets discuss the job details. Moreover, I am willing to start the job and perform tasks without even being hired; it is just to show my commitment to this project. Looking forward to hear from you.
$11 USD in 3 Tagen
8,8
8,8

Dear , We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time. We are 25 years in this business and our technical specialists have strong experience in PHP, JavaScript, CSS, Apache, MySQL, HTML, RESTful API, Data Visualization, Performance Tuning, LAMP and other technologies relevant to your project. Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews. Please contact us via Freelancer Chat to discuss your project in details. Best regards, Sales department Tangram Canada Inc.
$25 USD in 5 Tagen
9,1
9,1

Hello, I came across your project and found it truly interesting. With over eight years of hands-on experience in this field, I have successfully delivered high-quality solutions to clients worldwide. My dedication to excellence is reflected in the 180+ positive reviews from satisfied clients. I’d love to bring this expertise to your project and ensure outstanding results. However, I do have a few important points I’d like to clarify to align perfectly with your vision. Let’s connect via chat, where I can also share relevant examples of my past work. I'm looking forward to hearing back from you! Best Regards, Divu.
$12 USD in 40 Tagen
8,2
8,2

Hi, Having 8+ years of experience in Web/App Development and Design, I have worked extensively with LAMP stack. My profound knowledge of PHP, MySQL, CSS, HTML, and JavaScript make me confident that I can not only fix all the bugs your users are constantly reporting but also improve the overall performance of your SaaS application. I have a sound understanding of handling large databases and optimizing them for better performance which will be pivotal in your case. Over the years, I have also gained significant experience in integrating different RESTful APIs with web applications and one of my specialties is developing clean, well-documented RESTful APIs which will be crucial for the quick integration that you require. My proficiency in Laravel, CakePHP, CI, React.js/Node.js/Vue.js aligns well with your existing tech stack. I believe in delivering quality work within provided timelines to ensure utmost satisfaction for my clients. Looking forward to discussing further often to deliver on your goal of making your product faster, sturdier, and richer in features.
$15 USD in 40 Tagen
8,3
8,3

Hi Client, We’ve developed several SaaS products using PHP, JavaScript, and Python, with a strong focus on performance and security. One of our recent projects, Descripio, involved building a Chrome extension that used AI to analyze Amazon product pages and generate optimized product descriptions. We integrated multiple APIs, including Amazon’s, and implemented CI/CD pipelines for streamlined development. We also have extensive experience with MySQL and have worked with MariaDB and Percona. We understand the importance of optimizing database queries and server configurations to ensure fast, reliable applications. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit for your needs. I’m eager to learn more about your exciting project. Best, Adil
$15 USD in 40 Tagen
7,3
7,3

With over [X] years of industry experience, our team at SoftwareLinkers is uniquely equipped to manage and navigate the complexities of your project. We possess a comprehensive understanding of PHP, MySQL, CSS, HTML and JavaScript – all critical components for enhancing your LAMP stack application. I appreciate the mandate to maintain and extend your existing system, and assure you that I don't just understand technology, but also the emerging demands of today's users. Firstly, we excel at troubleshooting and debugging large codebases such as yours. Our methodical approach involves regression testing to ensure that no previously resolved issues resurface unexpectedly. Secondly, we have hands-on experience improving high-load applications like yours with smart indexing and query profiling techniques in Percona MySQL - an area where you particularly want us to focus. Lastly, along with enhancing your system's performance, our team is adept at developing robust user authentication systems with role management, interactive data-visualization dashboards, and clean REST APIs. To achieve your goals, we work with clear and incremental pull requests while communicating effectively through platforms like Slack. Our collaboration is focused on achieving integrational success at every step. If this aligns with your vision of how these enhancements should be executed and you're ready to take your SaaS to the next level together, let's discuss how we can start making that happen.
$15 USD in 40 Tagen
6,5
6,5

With over a decade of experience fueling my expertise in PHP 8, Percona MySQL, and Apache alongside Javascript, HTML, and CSS, I am ideally positioned to augment and fortify your production SaaS. My mountainous experience includes not simply building software but ensuring it runs efficiently and faultlessly despite evolving demands and scaling requirements. Much like you, I approach bug fixes with the urgency they deserve, ensuring that regression tests help us close the loop on all identified issues. And as for performance enhancement, MySQL query profiling and indexing are languages I speak fluently. My reputation as a top-rated developer is an assertive card on the table. Day by day availability along with meticulousness in sticking to scheduled deadlines is something I take immense pride in. Partnering with my team at Prajapati Technologies would simply bring you not only a developer but a development they are projecting utmost customer satisfaction through their services. So let's détente into code!
$8 USD in 40 Tagen
6,4
6,4

Dear Hiring Manager, I am a seasoned full-stack PHP developer with expertise in PHP 8, MySQL, Apache, JavaScript, and HTML/CSS. I specialize in enhancing and maintaining existing applications, which aligns perfectly with your project requirements. I have extensive experience in fixing bugs, improving performance, and adding new features to applications without the need for a complete rebuild. I am well-versed in handling edge-case errors, optimizing MySQL queries, and implementing new functionalities such as user authentication, data visualization dashboards, and REST APIs. I am confident that I can meet your deliverables by addressing critical bugs, optimizing page-load times, and successfully integrating new features into your application. I am ready to dive into your codebase, collaborate through clear and incremental pull requests, and enhance your product to be faster, sturdier, and feature-rich. Let's discuss how I can contribute to the success of your project. Best regards, Portfolio: freelancer.com/u/abdulhadi999
$14 USD in 40 Tagen
6,0
6,0

Good Day Thiru ✌️ I have carefully reviewed your project requirements for enhancing your Full-Stack PHP App and I am confident in my ability to deliver exceptional results. With expertise in PHP, MySQL, Apache, JavaScript, and HTML/CSS, I am well-equipped to address the bugs, enhance performance, and implement new features seamlessly. I am committed to providing unlimited revisions, unique creations, a money-back guarantee, constant communication, and timely delivery. You can view samples of my high-quality work in my portfolio: https://www.freelancer.com/u/leenadvnani6 I am eager to discuss your project further in the chat and collaborate closely to bring your vision to life. Let's connect and make your SaaS platform even more robust and efficient. Best regards, Leena Kumari :)
$8 USD in 40 Tagen
5,4
5,4

I hope you're doing well! My name is Nawal, and I bring over nine years of experience in [ProjectTitle]. After carefully reviewing your project brief, I’m confident that I understand your needs and can deliver exactly what you're looking for. Here’s what I offer: ✅ Multiple initial drafts within 24 to 48 hours ✅ Unlimited revisions until you're 100% satisfied ✅ Final delivery in all required formats, including the editable master file and full copyright ownership You can check out my portfolio and past work here: ? Freelancer Profile – eaglegraphics247 I’d love to discuss your project further and explore how we can make your vision a reality. Let me know a convenient time for a quick chat! Looking forward to working together. Best regards, Nawal
$10 USD in 3 Tagen
4,5
4,5

Hi Mate , Good morning! Already have something live to show you I am an expert mobile engineer with skills including Data Visualization, RESTful API, JavaScript, PHP, Apache, HTML, LAMP, CSS, MySQL and Performance Tuning. Please send a message to discuss more about this project. With regards
$50 USD in 32 Tagen
4,5
4,5

Hi there! I’ve reviewed your project and specialize in full-stack PHP development with a strong focus on LAMP stacks. I can tackle user-reported bugs, optimize MySQL performance, and implement new features like robust user authentication and dashboards. Let’s set up a quick meeting to discuss your needs further! Best Regards, Amjad Iqbal
$10 USD in 40 Tagen
4,8
4,8

Hi, I can jump straight into your LAMP-based SaaS, fix existing bugs, optimize MySQL queries for high concurrency, and implement new features like role-based authentication, interactive dashboards, and REST APIs. I’ll deliver clean, well-tested code with incremental PRs, full documentation, and performance improvements, ensuring the app is faster, stable, and ready for future growth.
$12 USD in 40 Tagen
4,5
4,5

Hello, Your project for enhancing a full-stack PHP app caught my attention, and I am confident I can add immediate value. With over 10 years of experience in PHP development, especially within a LAMP stack environment, I am well-versed in addressing performance issues and maintaining legacy code. I understand the importance of fixing user-reported bugs, enhancing MySQL performance through query profiling and smart indexing, and seamlessly integrating new features such as robust authentication and dynamic dashboards. I have successfully delivered similar projects by utilizing tools like PHPUnit and strategic CI/CD practices, ensuring stability and performance enhancements. Leveraging your Git access and seamless communication via Slack, I will ensure clear, incremental pull requests that align with your project's goals. I anticipate that I can close critical and high-priority bugs promptly, optimize page-load times, and implement new features effectively within a few weeks. Could you share more about the specific bugs you’re encountering? Thanks, Andriy
$20 USD in 31 Tagen
4,3
4,3

Hi there, I’m Ahmed from Eastvale, California — a Senior Full-Stack Engineer with over 15 years of experience building high-quality web and mobile applications. After reviewing your job posting, I’m confident that my background and skill set make me an excellent fit for your project — Full-Stack PHP App Enhancements . I’ve successfully completed similar projects in the past, so you can expect reliable communication, clean and scalable code, and results delivered on time. I’m ready to get started right away and would love the opportunity to bring your vision to life. Looking forward to working with you. Best regards, Ahmed Hassan
$40 USD in 40 Tagen
3,9
3,9

Hello, I have extensive experience maintaining and extending LAMP-based SaaS applications, including PHP 8 and Percona MySQL optimization. I can address your bug backlog, profile and tune database queries, and implement the new features you outlined—role-based authentication, interactive dashboards, and clean REST APIs—while keeping the code well-documented and fully tested. I follow incremental pull-request workflows and can integrate smoothly into your Git and staging setup. Looking forward to working with you! Can we discuss this further via private chat? Warm regards, Alesha
$25 USD in 40 Tagen
5,4
5,4

Hello, I am very interested in your project to enhance your full-stack PHP application. With my expertise in PHP, JavaScript, and CSS, I am confident that I can help tighten up your existing codebase and push your product forward. I understand the need to fix bugs, improve performance, and add new features to your application without the need for a complete rebuild. I am experienced in working with LAMP stack technologies and have a track record of successfully maintaining and extending existing applications. My proposed steps include addressing all reported bugs, optimizing performance with query profiling and smart indexing, and implementing new features such as user authentication, data visualization dashboards, and REST APIs. I would love to discuss this project further and collaborate on making your application faster, sturdier, and feature-rich. Best regards, UmeKayani
$12 USD in 40 Tagen
3,7
3,7

Hi there, Merry Christmas! Wishing you happiness, peace, and joy this holiday season. After studying your assignment, I've prepared the following options. I look forward to your feedback. Option A: Enhance your SaaS by fixing bugs, improving performance, and adding new features while maintaining the existing application. Option B: Dive into your codebase to tighten it up, address user-reported bugs, optimize MySQL reads, and implement new features like user authentication, data-visualization dashboards, and REST APIs. Let's discuss in detail through chat.
$25 USD in 52 Tagen
3,2
3,2

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