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I’m rebuilding a web application whose backend currently mixes legacy PHP with newer modules. The stack centres on PHP (latest stable) and a MySQL database, and I need an experienced backend developer who can confidently step into an evolving codebase while also creating fresh, well-architected components. Here’s what I need tackled: • API development – design and implement RESTful endpoints that plug seamlessly into the existing logic and any new features we add. • Database optimisation – review schema, refactor queries, add indexes, and benchmark improvements so we can see tangible speed gains. • User authentication system – build a secure, token-based solution that fits the current login flow and is flexible enough for future SSO or OAuth expansion. Because we’re working with a combination of old and new code, part of the job will involve auditing what’s already there, refactoring where it makes sense, and documenting your changes clearly so maintenance stays straightforward. Clean, commented code, Git-based version control, and concise commit messages are expected. If you’ve delivered high-performance PHP/MySQL backends before and enjoy turning complex, hybrid codebases into fast, reliable systems, I’d love to collaborate with you on this upgrade.
Projektin tunnus (ID): 40232891
145 ehdotukset
Etäprojekti
Aktiivinen 18 päivää sitten
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145 freelancerit tarjoavat keskimäärin $176 SGD tätä projektia

Hi, I can assist in this transition by implementing seamless RESTful APIs and optimizing your database for improved performance. With over 9+ years of experience in PHP and MySQL, I specialize in backend development and have tackled numerous projects involving legacy code. I’ll review your schema, refactor queries, and establish a robust user authentication system tailored for future expansions like SSO or OAuth. I prioritize clean coding practices and will document my changes to ensure your team can maintain the system effortlessly. Let’s discuss how we can make your web application robust and efficient. Best Regards, Priyanka
$200 SGD 2 päivässä
8,4
8,4

Hello, Hope you are doing well, As per your given project requirements i can confidently step in and help you rebuild your web application's backend that is a combination of legacy PHP and newer modules using my extensive experience in API development, Backend Development, JavaScript, MySQL, and PHP Firstly, I will tackle the API development by designing and implementing RESTful endpoints that seamlessly integrate into the existing logic while accommodating any new features we add. This process will involve auditing what's already there, refactoring where necessary, ensuring clean and concise code with comprehensive documentation for ease of future maintenance. Let’s embark on this incredible upgrade journey together! Thank you Regards Gaurav D.
$200 SGD 7 päivässä
8,5
8,5

Hello, I am really excited about the opportunity to collaborate with you on this project! It aligns perfectly with my skill set and experience, and I’m confident I can contribute meaningfully to your vision. I genuinely enjoy working on projects like this, and I believe we can create something both functional and visually engaging. Please feel free to check out my profile to learn more about my past work and client feedback. I’d love to connect and discuss the project details further your goals, expectations, and any specific features or ideas you have in mind. The more I understand your vision, the better I can bring it to life. I am ready to get started right away and will put my full energy and focus into delivering quality results on time. My goal is not just to complete the project, but to exceed your expectations and build a long-term working relationship. Looking forward to hearing from you soon! With regards! Divya
$250 SGD 7 päivässä
8,1
8,1

Hi, Stepping into a tale where legacy meets modernity, I understand the challenge of harmonizing your PHP/MySQL backend into a smooth, high-performing symphony. With extensive experience in PHP and MySQL, I've transformed complex codebases by designing clean RESTful APIs, optimizing databases for real speed, and implementing secure, flexible token-based authentication systems ready for SSO or OAuth expansions. I’ll start by auditing your current setup to identify refactoring opportunities, then develop and benchmark improvements that make tangible performance gains while maintaining clean, clear documentation and Git version control standards. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. Let’s collaborate to bring clarity and power to your backend infrastructure. Could you share more about the current challenges with the legacy code that you want to address first? Thanks, Asad
$95 SGD 5 päivässä
8,2
8,2

YES, it's aligned with my expertise Senior PHP/MySQL Backend Upgrade ------------------I am highly proficient to work on this project . I am Passionate PHP/Full stack developer having rich experience with all the latest technologies with so many successful Tasks. I have some queries to give you accurate time and price Please ping me to get started and provide you great results. Thanks
$250 SGD 7 päivässä
8,2
8,2

⭐⭐⭐⭐⭐ Build Efficient PHP/MySQL Backends for Your Evolving Web Application ❇️ Hi My Friend, I hope you are doing well. I just checked all of your project requirements and I can see you are looking for an experienced backend developer. You have no need to look any further as Zohaib is here to help you! My team has successfully completed 50+ similar projects for PHP/MySQL backends. I will focus on creating robust APIs, optimizing your database, and implementing a secure authentication system to enhance your web application. ➡️ Why Me? I can easily handle your project as I have 5 years of experience in PHP and MySQL development, specializing in backend solutions, API design, and database optimization. I also have a strong grip on version control systems like Git, ensuring clean and maintainable code. ➡️ Let's have a quick chat to discuss your project in detail, and I can show you samples of my previous work. Looking forward to discussing with you in chat. ➡️ Skills & Experience: ✅ PHP Development ✅ MySQL Database Management ✅ API Development ✅ RESTful Services ✅ Database Optimization ✅ User Authentication Systems ✅ Code Refactoring ✅ Version Control (Git) ✅ Performance Benchmarking ✅ Secure Coding Practices ✅ Documentation Skills ✅ Problem Solving Waiting for your response! Best Regards, Zohaib
$150 SGD 2 päivässä
7,9
7,9

I can step into your hybrid PHP codebase and help modernise it while keeping everything stable and maintainable. With strong experience in PHP (latest versions), MySQL optimisation, and API architecture, I’ll focus on improving performance, security, and scalability without disrupting existing workflows. Scope • Audit legacy + new modules and document current architecture • Build RESTful APIs that integrate cleanly with existing logic • Optimise database schema, queries, and indexing with measurable benchmarks • Implement secure token-based authentication (JWT/session hybrid if needed) with future SSO/OAuth readiness • Refactor critical areas for performance and readability • Clean, documented code with Git version control and clear commits Approach Codebase audit + optimisation roadmap API design and implementation DB tuning and performance testing Auth system integration Documentation and handoff You’ll get a faster, more secure backend with clear structure and documentation, making future feature development and maintenance straightforward.
$140 SGD 7 päivässä
8,4
8,4

Hi, ➡️ I read your project description about upgrading your web application’s backend, mixing legacy PHP with newer modules, focusing on PHP and MySQL. ⏺️ I specialize in modernizing and enhancing PHP/MySQL backends, particularly transitioning complex, mixed-code environments to streamlined, efficient systems. My expertise in API development, database optimization, and secure authentication systems perfectly aligns with your needs. I ensure clean, maintainable code with thorough documentation to facilitate future upgrades. Regards, Aftab Ahmad Full Stack Developer (12 Years of Experience)
$150 SGD 6 päivässä
7,3
7,3

Hello, As a seasoned Backend Developer with an unmatched proficiency in PHP, JavaScript, and MySQL, I am perfectly equipped to bring your vision for this upgrade to life. With over 10 years of experience, my team and I at WellSpring Infotech have tackled similar projects multiple times, specializing in transforming complex codebases into well-performing systems. We have created several RESTful endpoints seamlessly integrating with existing logics, fine-tuned databases for immense speed gains, and implemented robust, secure user authentication systems. What sets us apart is our holistic approach. Alongside the technical deliverables you're looking for, we pledge to provide clear documentation and well-commented code that facilitates maintenance while fostering smooth knowledge transfer. We are also religious about Git-based version control with concise commit messages. Finally, our track record speaks volumes: having spearheaded projects in areas coinciding with yours - like proptech and healthcare - we present not just technical expertise but also domain-specific insights that can add immense value to your project. I'm eager to put all my skills and experience to use in transforming your web application into a fast, reliable solution that empowers your business's growth and innovation. Let's make this happen! Thank you
$250 SGD 5 päivässä
7,9
7,9

I can help you upgrade your PHP backend and modernize your legacy code. I will build secure RESTful APIs and a token-based authentication system that is ready for future expansion like OAuth. I'll also optimize your MySQL database by refactoring queries and fixing the schema to ensure your app runs much faster. I follow Git best practices and write clean, documented code to make future maintenance easy for you. Please message me so we can discuss the current structure of your codebase.
$100 SGD 4 päivässä
7,1
7,1

Hi, I’m excited about the opportunity to upgrade your web application’s backend! With extensive experience in PHP and MySQL, I’m confident in my ability to audit your existing codebase and create robust new components. I have successfully developed high-performance PHP/MySQL backends that seamlessly integrate legacy code with modern systems. For your project, I will design and implement RESTful API endpoints that enhance the existing logic while ensuring scalability for future features. I will also perform a thorough database optimization by reviewing the schema, refactoring queries, and adding necessary indexes for speed improvements. Additionally, I will build a secure, token-based user authentication system that aligns with your current login flow and allows for future SSO or OAuth integration. I intend to deliver clean, well-documented code with Git version control to ensure maintenance is straightforward. Let's discuss the next steps to make this upgrade a success!
$250 SGD 10 päivässä
6,7
6,7

Hi there! I have over 8 years of experience in custom application development, specializing in PHP and MySQL backend systems. I understand the need to upgrade your web application's backend, focusing on API development, database optimization, and user authentication system implementation. I have a proven track record of designing and implementing RESTful APIs, optimizing database schemas, and building secure user authentication systems. My expertise in refactoring codebases, documenting changes, and utilizing Git for version control aligns perfectly with the requirements of this project. With a perfect 5-star rating and a 100% project success rate, I am confident in my ability to deliver a well-architected and high-performance backend for your web application. Let's discuss your project further to explore how we can work together to achieve your goals. Thanks!
$250 SGD 14 päivässä
6,8
6,8

As a seasoned Full Stack Software Engineer, I am more than qualified to handle the complex tasks associated with your Senior PHP/MySQL Backend Upgrade. My extensive 12-year experience in building high-performing applications couples well with your project scope. I have a strong capability in designing and implementing RESTful endpoints, which will be essential for integrating the existing logic and any new functionalities you wish to add. Furthermore, I possess adept skills in database optimization, which involve end-to-end evaluation of the schema, refactoring queries, adding indexes, and benchmarking post-improvements for tangible performance gains. This aligns directly with your requirements of streamlining the MySQL database for improved speed and efficiency. Your project will also require a seasoned developer to audit existing codebases and skillfully refactor them where needed. Fortunately, I have successfully completed similar tasks in my career while exhibiting excellent documentation practices throughout. In addition, my expertise maps perfectly to constructing an adaptable user authentication system, ensuring secure token-based solutions that can flexibly cater to future SSO or OAuth expansion plans. Let's work together to transform your current hybrid codebase into a fast, reliable system!
$80 SGD 3 päivässä
7,1
7,1

Hello I am a Backend Developer with deep expertise in PHP and MySQL, and I am well prepared to help you rebuild and modernize your web application. I have extensive experience stepping into hybrid codebases that mix legacy PHP with newer modules, and I understand the discipline required to audit, refactor, and extend such systems without disrupting what already works. For API development, I will design and implement clean RESTful endpoints that integrate seamlessly with your existing logic while following modern architectural patterns. For database optimisation, I will conduct a thorough review of your MySQL schema, identify slow or redundant queries, refactor them for efficiency, add strategic indexes, and benchmark every change so you can see measurable speed improvements with clear before-and-after metrics. I have a strong understanding of query profiling tools, execution plan analysis, and normalization strategies that consistently deliver tangible performance gains on production databases. For the authentication system, I will build a secure token-based solution using industry-standard practices including hashed credentials, refresh token rotation, and proper session expiration. The system will integrate naturally with your current login flow while being architected with enough flexibility to support SSO or OAuth expansion in the future without requiring a rebuild. Looking forward to your reply Regards.
$350 SGD 1 päivässä
6,6
6,6

I can step into your hybrid PHP/MySQL codebase, stabilise the legacy layers, and design clean, modern backend components that integrate seamlessly with what already works. I’ll deliver well-structured RESTful APIs, measurable database optimisation (indexes, query refactoring, benchmarking), and a secure token-based authentication system ready for future OAuth/SSO expansion. My approach includes code auditing, selective refactoring, performance profiling, and clear technical documentation to keep long-term maintenance simple. You’ll get clean, testable PHP (latest stable), disciplined Git workflow, concise commits, and a backend that is faster, safer, and easier to scale.
$320 SGD 1 päivässä
6,9
6,9

I am doing full time freelancing & can start work asap. I have an experience of 11 years into web development using codeigniter, laravel, angularjs, MySQL, JQuery etc.. Thank you for your posted project and hope you are doing great. To discuss more on the project, I would like to hold a detailed discussion with you in order to have a more clear understanding of your requirements. As of now, I have placed a PLACEHOLDER BID. I have developed many complex projects such as Education Portals, Community Portals, Real Estate Portals, Job Portals, Daily Deals & Coupons websites, B2B, B2C Portals, Classified Portal, Social Networking website, Affiliate based websites, Price comparison websites. I am proficient with PHP framework like - PHP - Codeigniter - Laravel - Cakephp - MYSQL - API development / Third Party API integration like Facebook, google, SMS integration, Payment Gateway Integration - JQuery - Angular Your satisfaction with the project is my top priority! If you give me a chance to work with you then I will try my best level for your project to run successfully.
$140 SGD 5 päivässä
6,5
6,5

Hello, Hope you are doing well, i have a 9+ year experience in backend web development and I strongly believe my extensive knowledge in PHP and MySQL makes me a perfect fit for this critical project. Throughout my career, I've successfully rebuilt numerous web applications while handling hybrid codebases similar to yours, so I'm well-versed in the challenges and intricacies that arise. My expertise in API development matches your needs perfectly; I've designed and implemented RESTful interfaces that seamlessly integrate with both existing and newly added features. Additionally, I grasp the importance of optimization within a database schema and queries to deliver tangible speed gains. I guarantee a thorough review, refactoring, indexing, and benchmarking to ensure your application performs excellently. I greatly look forward to collaborating closely towards a successful backend upgrade! thank you Regards Hemlata G.
$140 SGD 7 päivässä
6,5
6,5

Hello, Thank you so much for posting this opportunity. It sounds like a great fit, and I’d love to be part of it! I’ve worked on similar projects before, and I’m confident I can bring real value to your project. I’m passionate about what I do and always aim to deliver work that’s not only high-quality but also makes things easier and smoother for my clients. Feel free to take a quick look at my profile to see some of the work I’ve done in the past. If it feels like a good match, I’d be happy to chat further about your project and how I can help bring it to life. I’m available to get started right away and will give this project my full attention from day one. Let’s connect and see how we can make this a success together! Looking forward to hearing from you soon. With Regards! Abhishek Saini
$250 SGD 7 päivässä
6,6
6,6

Hello I can upgrade your backend api and mysql database. Seems your current system are based on PHP 5.6 or below than 7.0 I will update last 8.4 php version and integrate all database. A few hours, I finished these similar task for Germany client. Please text me to discuss project. Thanks
$140 SGD 1 päivässä
6,3
6,3

Hello Ash! I’m excited about the opportunity to help with your project. Based on your requirements, I believe my expertise in PHP, JavaScript, MySQL, OAuth, RESTful aligns perfectly with your needs. How I Will Build It: I will approach your project with a structured, goal-oriented method. Using my experience in PHP, JavaScript, Software Architecture, MySQL, RESTful, OAuth, Backend Development, API Development, I’ll deliver a solution that not only meets your expectations but is also scalable, efficient, and cleanly coded. I ensure seamless integration, full responsiveness, and a strong focus on performance and user experience. Why Choose Me: - 10 years of experience delivering high-quality web and software projects - Deep understanding of PHP, JavaScript, MySQL, OAuth, RESTful and related technologies - Strong communication and collaboration skills - A proven track record — check out my freelancer portfolio. - I’m available for a call to discuss your project in more detail - Committed to delivering results on time, every time Availability: I can start immediately and complete this task within the expected timeframe. Looking forward to working with you, Ash! Best regards, Ali Zahid Singapore
$140 SGD 7 päivässä
5,9
5,9

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