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Advanced WordPress / WooCommerce Developer – Booking System We are looking for an experienced PHP / WordPress / WooCommerce developer to extend an existing custom booking plugin. The existing system is operational. This is an extension of an existing codebase, not a rebuild. Required expertise Advanced PHP & WordPress plugin development WooCommerce development and payment workflows Payment authorization / delayed capture MySQL transactions and race-condition-safe processing Booking/reservation and capacity systems Secure token-based invitation/acceptance workflows WordPress Cron and automated workflows Testing, debugging and regression prevention Experience extending existing custom plugins The project includes complex session processing, automated teacher assignment, payment handling and replacement-session logic. Important Development exclusively on staging No production access Existing functionality must be preserved No unnecessary third-party dependencies Thorough testing is required Fixed Price: USD 180 Strictly non-negotiable. The complete agreed scope must be delivered for USD 180. Please answer briefly: Years of professional PHP/WordPress experience? One relevant booking/reservation project? Experience with payment authorization and delayed capture? How would you prevent two simultaneous bookings from exceeding capacity? How would you prevent two teachers from being assigned simultaneously? Confirm: USD 180 fixed and non-negotiable? (Yes/No) Confirm: staging-only development with no production access? (Yes/No) Generic applications without relevant experience will not be considered. The detailed technical specification will be provided to shortlisted candidates. The existing plugin architecture must be understood and extended rather than unnecessarily rebuilt.
Project ID: 40686005
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40 freelancers are bidding on average $160 USD for this job

Hello, With over a decade of experience in the technology industry and a proven track record in WordPress and WooCommerce development, I believe I am the perfect fit for your project. My skills span across various domains - be it developing clean, efficient codes or creating user-friendly interfaces to achieve desirable outcomes. I have worked on multiple successful booking platforms, with the most notable being an end-to-end booking system for an international travel company. This provided me with valuable experience and insights regarding payment authorization, delayed capture, and managing bookings and reservations. In my previous projects, I've encountered scenarios demanding safe race-condition processing to avoid situations wherein simultaneous bookings exceed capacity. Employing MySQL transactions efficiently is something I can vouch for. Moreover, using secure token-based invitation systems to ensure security and prevent double bookings is also a domain where I have hands-on experience. Now, to address your concerns directly: I am unequivocal about keeping the agreed scope intact and within budget. USD 180 is acceptable to me as long as we don't fundamentally change the project's scope. Similarly, staging-only development with no production access perfectly aligns with my working style as it emphasizes zero-risk operations. Let's team up to extend your existing plugin and create a solid yet scalable infrastructure that with Thanks!
$180 USD in 3 days
8.6
8.6

Hi, I reviewed your request to extend an existing custom WordPress booking plugin for WooCommerce, keeping all current functionality intact on staging only. I’ll work directly with the existing PHP/WordPress/WooCommerce codebase to add booking and capacity logic, token-based invitation/acceptance workflows, and secure session processing. I’ll implement the payment authorization with delayed capture flow, handle MySQL transaction boundaries to avoid race conditions, and wire any required API Integration while preserving existing plugin architecture. I focus on thorough testing, debugging, and regression prevention, with clean, maintainable code. Let’s discuss here now.
$150 USD in 7 days
8.5
8.5

Dear Client, READY TO START NOW I am a seasoned WordPress/Woo-commerce freelancer with expertise in theme customization, plugin development, and efficient project delivery. My skills include WordPress, PHP, HTML, CSS, and more. Looking forward to contributing to your project's success. Once the scope will be discussed, I will begin working on it right away. Best regards, Singh
$180 USD in 7 days
8.4
8.4

Hi, I have over 5 years of professional experience in PHP and WordPress development. I have worked on a similar booking/reservation project with payment authorization and delayed capture. To prevent simultaneous bookings exceeding capacity, I will implement a MySQL transaction system. To prevent simultaneous teacher assignments, I will use a locking mechanism. I confirm the fixed price of USD 180 and staging-only development. Let's discuss further. Regards, Sai Bhaskar
$120 USD in 5 days
7.9
7.9

This is an extension of the existing booking plugin, so I would first map its session, capacity, teacher, WooCommerce, and Cron flows before changing behavior. I have 10+ years of professional PHP/WordPress experience and have delivered 249+ projects. A relevant WordPress project was a Dubai property roadshow RSVP system with structured reservation capture; I have also built custom WordPress order functionality and WooCommerce/payment integrations. I can handle authorization versus delayed capture, webhook/idempotency handling, and replacement-session refunds or payment updates while preserving the current architecture. To prevent overbooking, I would process availability inside a MySQL transaction, lock the relevant capacity row with SELECT ... FOR UPDATE, validate remaining capacity, then create the booking atomically with supporting unique constraints. Teacher assignment would use the same transaction/locking strategy so two concurrent sessions cannot assign the same teacher. Invitation acceptance would use hashed, expiring tokens with single-use validation. I will develop exclusively on staging, add focused regression tests, and verify Cron, payment, race-condition, and failure paths before delivery. Years: 10+. Payment authorization/delayed capture: Yes. Prevent simultaneous overbooking: transactional row locks plus constraints. Muhammad Saad
$180 USD in 4 days
7.9
7.9

Hi, I understand the need to extend the existing custom booking plugin seamlessly without rebuilding it. I will leverage my advanced PHP and WordPress skills to enhance the booking system, WooCommerce workflows, and payment authorization processes. How do you currently handle session conflicts to prevent exceeding capacity? Looking forward to chatting. Thank you.
$120 USD in 2 days
6.7
6.7

Hi there, I read your project "WordPress Booking Plugin Extension Developer" and it matches what I do with PHP, WordPress, HTML. I have delivered similar work before and can start right away. I can complete it in 8 days for 325 USD, revisions included. Can you share any extra details or files so I can confirm the scope? Happy to start today.
$325 USD in 8 days
6.6
6.6

Hi there, I am excited to apply for the WordPress Booking Plugin Extension Developer role. With over 7 years of experience in PHP and WordPress development, I have successfully worked on complex projects involving custom plugin development and WooCommerce integration. A notable project was a custom reservation system for a hospitality client, where I managed booking workflows and capacity constraints similar to your requirements. I understand the critical need for secure payment authorization and delayed capture. In my previous projects, I have implemented robust MySQL transaction handling to prevent race conditions, ensuring that simultaneous bookings do not exceed capacity. For teacher assignment, I would use a token-based approach combined with WordPress Cron jobs to ensure no overlap occurs. My expertise in debugging and regression testing will be crucial in preserving existing functionality while extending your plugin. I am committed to developing exclusively on staging and adhere strictly to the outlined requirements, including avoiding unnecessary dependencies. I am eager to contribute my skills to enhance your booking system, ensuring high performance and reliability. I am familiar with the intricacies of extending existing codebases and look forward to understanding the detailed specifications to deliver an effective solution. Thank you for considering my proposal. I am looking forward to the possibility of working together. Best Regards,
$140 USD in 5 days
6.7
6.7

Extending a live booking plugin means the race conditions matter more than the new features. For capacity and teacher assignment I'll use SELECT ... FOR UPDATE inside a MySQL transaction, so two concurrent bookings can't both win the last slot. Delayed capture via WooCommerce payment gateway hooks, token invites signed and single-use, all on staging. Active in PHP/WordPress since 2018. 1) Which gateway handles auth/capture, Stripe or something else? 2) Is WP-Cron replaced by a real system cron on the server? Yes to both confirmation questions. Thanks Shayan
$132 USD in 3 days
5.7
5.7

With over a decade of professional experience in HTML, PHP, WordPress, and MySQL, I have the skill set necessary to expertly handle your project. I pride myself on my understanding of complex plugin systems like what you have in place, and I'm perfectly capable of extending an existing codebase without compromising its integrity - exactly what your project entails. My proficiency with WooCommerce development, payment workflows, and scheduling systems further underpin my compatibility with this job. In regards to one relevant booking/reservation project – I recently developed a fully integrated online appointment management system for a dental clinic. The system was tailored to include capacity tracking for both dentists' availability and treatment rooms ensuring that no conflicting bookings were made. Similarly, I implemented secure token-based workflows that ensured only patients with valid invitations could book appointments - something you specifically mentioned as an important requirement. Conclusively, my fixed price commitment to deliver your complete specified scope for USD 180 aligns perfectly with the terms you've set. And last but not least, as stated in my initial profile, non-production access is not a problem for me as all my work is exclusively done on staging environments. Let's connect and take things ahead!
$180 USD in 7 days
6.1
6.1

Greetings, I confirm the fixed price of USD 180 is non-negotiable and that development will be done exclusively on staging with no production access. You're looking for an experienced developer to extend your existing booking plugin, ensuring all current functionalities remain intact while adding new features like automated teacher assignments and payment handling. With several years of professional PHP and WordPress experience, I’ve worked on booking and reservation systems where I've implemented similar complexities. For instance, I’ve developed solutions that manage simultaneous bookings through MySQL transactions, preventing capacity issues by locking rows during critical updates. Additionally, I've designed workflows that ensure teachers are assigned without overlap, using token-based systems for secure invitation acceptance. I understand the importance of thorough testing and debugging to maintain a seamless user experience. Best regards, Muhammad Arshman
$156 USD in 3 days
4.8
4.8

Hi, you’re extending an existing WordPress/WooCommerce booking plugin, so preserving current behavior while adding session, payment, and assignment logic is the right approach. I’ve worked on custom PHP and WordPress plugins, including booking flows, WooCommerce payment handling, and cron-based automation. I’m comfortable working inside an existing codebase, adding features without rebuilding what already works, and testing carefully to avoid regressions. For capacity and teacher assignment, I would use transaction-safe processing with row locking or atomic updates in MySQL, plus clear state checks before confirming a booking or assigning staff. That prevents double-booking and duplicate teacher allocation under concurrent requests. I can work staging-only, keep dependencies minimal, and focus on the agreed scope exactly. If you’d like, I can review the current architecture and map the safest implementation path. Best regards, Gabriel
$250 USD in 5 days
4.7
4.7

Building on a WooCommerce booking system often means juggling custom time slots, inventory rules and payment integration. I’ve spent the past few years extending WordPress booking plugins and tweaking PHP code to match unique reservation workflows, including adding custom fields and syncing with third party calendars. Definitely something I can help with. You can check my feedback for similar projects on my profile. I’m happy to keep communication clear and iterate quickly to nail the exact functionality you need. Could you share which booking plugin you’re currently using and any specific features you’d like to add or modify? Also, what’s the expected launch date for the updated system? Portfolio: https://www.freelancer.com/portfolio-items/11521810-app-ui-ux https://www.freelancer.com/portfolio-items/11525614-webapp-design Regards Shahwaiz Shaban
$170 USD in 10 days
4.7
4.7

I can extend your existing booking plugin without disrupting its current architecture, focusing on safe session processing, capacity control, teacher assignment, payment workflows, and replacement-session logic. Answers: • PHP/WordPress experience: I won’t invent a year count; happy to provide the exact figure directly. • Relevant project: I can work with existing PHP/WordPress booking and WooCommerce workflows, including custom plugin extensions. • Payment authorization/delayed capture: Yes — I can implement the required WooCommerce payment workflow around authorization, capture, and booking state changes. • Capacity protection: Use atomic MySQL transactions with row-level locking/conditional updates so concurrent requests cannot reserve beyond available capacity. • Teacher assignment protection: Lock the relevant assignment/session records inside a transaction and re-check availability before committing, preventing simultaneous assignment. • USD 180 fixed/non-negotiable: Yes. • Staging only/no production access: Yes. I’ll first map the existing plugin’s hooks, database flow, booking states, and WooCommerce integration, then extend it rather than rebuilding it. Changes will stay dependency-light and include regression testing for existing functionality. Share the detailed technical specification and I can review the required extension points.
$150 USD in 2 days
4.5
4.5

Hello, I have thoroughly reviewed your project requirements and understand the need for an experienced PHP/WordPress/WooCommerce developer to extend your existing custom booking plugin. With over 5 years of expertise in WordPress, HTML, PHP, and WooCommerce, I am confident in providing a professional solution tailored to your project description. To get a better sense of my skills, please visit my portfolio: https://www.freelancer.pk/u/Aqsa4400 I am eager to discuss the project further with you. Please start a chat so we can delve into the details. Best regards, Aqsa Usman
$150 USD in 2 days
4.0
4.0

Over my 6 years of professional experience in PHP and WordPress development, I've tackled numerous projects involving WooCommerce and intricate booking systems, just like yours. In fact, my last booking project involved a complex set of tasks similar to what you're looking for - session processing, assigning teachers, and handling payments flawlessly. Furthermore, my background in API integration has allowed me to become adept in ensuring secure token-based workflows.
$120 USD in 3 days
3.7
3.7

Hello, The key part of this project is extending the existing booking plugin without breaking capacity, payments, or session logic. I can help you handle this accurately and efficiently without overcomplicating the process. I have hands-on experience with PHP, WordPress, and API Integration, including building plugin workflows that depend on reliable state changes and external callbacks. For your project, I would focus on the booking and replacement-session flow, secure payment authorization / delayed capture, and MySQL transaction safety around capacity and teacher assignment, while making sure the final result is stable on staging and preserves existing behavior. I can start immediately and expect to complete this within 14 days. One detail I'd like to confirm before starting: should payment capture happen only after teacher assignment is fully confirmed, or on a separate approval event?Should payment capture happen only after teacher assignment is fully confirmed, or on a separate approval event?? Best regards, Miguel
$180 USD in 14 days
3.8
3.8

Hello, This looks like a strong fit for an experienced PHP/WordPress/WooCommerce developer working on an existing booking system. I’m comfortable extending custom plugins without rebuilding them, and I understand the importance of preserving current functionality while adding new workflow logic. I can work exclusively on staging, avoid unnecessary dependencies, and focus on thorough testing to protect against regressions. I’m also familiar with transaction-safe processing, booking/capacity controls, invitation-style workflows, cron-driven automation, and payment-related logic including authorization and delayed capture. I’m ready to review the existing architecture and extend it carefully within the agreed scope. Best regards.
$250 USD in 4 days
2.6
2.6

Hello, Being in the industry for over 16 years, I've built a strong expertise in PHP and WordPress plugin development, making me a perfect fit for extending your existing custom booking plugin. I've also worked extensively with WooCommerce and am well-versed in its payment workflows, including payment authorization and delayed capture, which are integral to your project. My approach to preventing race conditions and ensuring capacity management is through my deep understanding of MySQL transactions and smart processing. In terms of relevant experience, I've carried out numerous successful booking/reservation projects before. This hands-on experience helps to understand the complexities involved in organizing sessions and teacher assignments accurately. To guarantee smooth operations, I often employ secure token-based invitation/acceptance workflows alongside robust WordPress Cron and automated workflows implementations. Importantly, I understand that preserving existing functionality is critical in extending an already operational system, which aligns with your project requirements. You can trust me to maintain high-quality code with no unnecessary hiccups or third-party dependencies. I adhere strictly to agreed-upon fixed-price terms; indeed USD 180 is non-negotiable for the agreed scope of work. Finally, venerating your no-production access policy; my development will exclusively occur on staging - assuring you complete control o Thanks!
$170 USD in 1 day
2.7
2.7

Greetings, I confirm my acceptance of the USD 180 fixed price and the staging-only development with no production access. You’re looking for a PHP and WordPress expert to extend your existing booking plugin while ensuring that all current functionalities remain intact. I have solid experience in customizing plugins, which means I can efficiently add your required features like automated teacher assignment and payment handling without disrupting the existing code. With years of experience in PHP and WordPress development, I’ve tackled similar projects involving booking systems and payment workflows. I can implement robust mechanisms to prevent simultaneous bookings that exceed capacity, ensuring a smooth user experience. Additionally, I’ll ensure that teacher assignments are handled correctly to avoid conflicts. Looking forward to the opportunity to work on this project. Best regards, Muhammad Usman Kamran
$150 USD in 7 days
1.5
1.5

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