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Project Description We are looking for an experienced backend developer to build an automated integration between PYN Booking (Romanian PMS / Channel Manager with Open API) and TTHotel (TTLock hotel system). The goal is to automatically generate time-limited PIN codes for hotel room access based on reservations received in PYN Booking. ⸻ System Overview Reservations are created in PYN Booking from multiple sources ([login to view URL], Airbnb, website, walk-ins). When a reservation is created, updated, or cancelled, the system must automatically manage room access via TTHotel API. ⸻ Integration Flow 1. Reservation is created in PYN Booking 2. PYN Booking sends reservation data via webhook or API 3. Middleware service processes the reservation 4. Room is mapped to a smart lock 5. TTHotel API generates a PIN code valid from check-in to check-out 6. PIN code is sent automatically to the guest 7. On reservation update or cancellation, access is updated or revoked ⸻ Required Integrations PYN Booking • Webhooks or API endpoints for: • reservation_created • reservation_updated • reservation_cancelled Required reservation data: • reservation_id • room_id or unit_id • check_in datetime • check_out datetime • guest_name • guest_email • guest_phone • reservation_status ⸻ TTHotel (TTLock) • Use TTHotel Open API • Required actions: • create time-limited PIN codes • update PIN validity • revoke PIN access on cancellation ⸻ Middleware Responsibilities • Receive and validate reservation events • Map rooms to lock IDs • Calculate access validity windows • Generate PIN codes via TTHotel API • Send PIN codes to guests (email required, SMS optional) • Handle updates and cancellations correctly • Log events and handle API errors ⸻ Technical Requirements • Backend development (Node.js, Python, or PHP) • REST API integration experience • Secure webhook handling • Clean, documented code • Lightweight database for room-lock mapping • Deployment-ready solution (VPS or cloud) No frontend or UI is required. ⸻ Deliverables • Fully functional middleware service • Working integration with PYN Booking API • Working integration with TTHotel API • Configuration and setup documentation • Basic test cases for create, update, and cancel reservation scenarios ⸻ Important Notes • The solution must be reusable for future hotels • Code ownership will belong to us • Experience with hotel PMS or smart lock systems is a plus
Projekt-ID: 40069180
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178 Freelancer bieten im Durchschnitt $525 USD für diesen Auftrag

I’ve reviewed the full description, and this is a straightforward but critical automation problem: turning reservation lifecycle events into correct, time-bound physical access, without manual intervention or edge-case failures. The complexity here isn’t volume. It’s correctness. PINs must be generated, updated, and revoked at exactly the right times, based on reservation state, and the system must stay reliable across multiple booking sources and future hotels. Technical approach • Backend: Node.js or Python clean service architecture, no unnecessary framework weight • Secure webhook endpoints with signature validation • Lightweight database for: – room to lock mappings – reservation to PIN references • REST-based integration with both PYN Booking and TTHotel APIs • Deployment-ready for VPS or cloud Docker-friendly if desired I’ve worked on event-driven backend systems and third-party integrations where reliability and lifecycle correctness mattered more than UI, and I’m comfortable owning this end to end. If helpful, the next step could be: • reviewing PYN Booking webhook formats • confirming TTHotel API constraints • or defining edge cases late checkout, room change, no-show Happy to discuss details and move forward. Best regards, Jenifer
$500 USD in 30 Tagen
9,5
9,5

I have extensive experience in PHP, JavaScript, Python, Software Architecture, and MySQL, making me a perfect fit for the PYN-TTHotel Auto Check-in API project. I am confident in my ability to deliver a high-quality solution within your budget. Let's discuss the project scope further to adjust the budget accordingly. I am eager to start working on this integration and showcase my skills. Please review my profile for the work I have done over the past 15 years. Your satisfaction is my top priority, and I am ready to begin working on this project immediately.
$525 USD in 10 Tagen
8,7
8,7

Hello, I understand that you're seeking for a skilled backend developer with robust REST API integration experience who can create a solid automated link between PYN Booking and TTHotel. With my combined proficiency in Python, PHP, Node.js & MySQL, I've developed sophisticated systems like yours with clean and well-documented code. Webhooks and API endpoints are in my wheelhouse; I'm capable of handling complex data scenarios such as mapping rooms to smart locks, calculating valid access periods, and generating secure but easily conveyed PIN codes (considering your mention of email/SMS). In addition to my adeptness in the stack you demand, I'm no stranger to working on lightweight databases and providing scalable deployment solutions. My multidisciplinary expertise extends beyond coding into fields as diverse as Machine Learning, Big Data Analysis and Game/Web Development. This unique blend allows me to bring problem-solving skills from different sectors into the table, something that proved invaluable for other clients in the past. I am confident this expertise makes me the ideal candidate for delivering a highly efficient solution to your specific dynamic project requirements. Let's start transforming your idea into reality! Remember, your satisfaction is my utmost priority. I am more than willing to provide configuration/setup documentation and pointers for testing specific scenarios at the end of our successful collaboratio Thanks!
$750 USD in 1 Tag
8,3
8,3

Hello there, I can develop a robust backend solution to seamlessly integrate PYN Booking with TTHotel, automating PIN code generation for room access. This middleware will handle reservations, updates, and cancellations, ensuring smooth operations through TTHotel's API. I'll use secure webhooks and a lightweight database for room-lock mapping, providing a deployment-ready solution in Node.js, Python, or PHP. The deliverables include a fully functional middleware, tested integrations, and comprehensive documentation. My experience with REST API integration and secure backend development will ensure clean, documented, and reusable code. Questions: • Do you have a preference for the backend language among Node.js, Python, or PHP? • Would you prefer PIN codes to be sent via email only, or is SMS integration also required? Looking forward to creating a solution that enhances your hotel's operational efficiency and guest experience. Thanks and best regards, Kamran
$270 USD in 10 Tagen
8,4
8,4

Hi, What specific features do you want to ensure in the middleware service for the PYN Booking and TTHotel integration? I can create a seamless integration that automatically generates and manages time-limited PIN codes for guests based on reservations. With over 8+ years of backend development experience, I specialize in REST API integrations, and I am proficient in Node.js, Python, and PHP. I’m also familiar with hotel PMS and smart lock systems, which will expedite the project. I will make sure your solution is documented and deployment-ready, ensuring it’s reusable for future hotels. I’m here to provide a clean, efficient, and reliable solution. Let me know if you’d like to discuss further! Best Regards, Priyanka
$500 USD in 7 Tagen
8,3
8,3

Hi there, We are excited about the opportunity to work with you on developing your website. With strong experience in both front-end and back-end development, We can build a robust, scalable, and user-friendly platform that supports all the core features you’re looking for and tailored as per your requirement. Why Us? • 10+ years of experience in full-stack development • Built several website in all kind of domain platforms (portfolio available on request) • Strong grip on user flows, admin control, and clean UI/UX design • Expertise in PHP, JavaScript, MySQL, HTML/CSS, Laravel and modern frameworks Timeline & Estimate: Depending on final scope after the detail discussion with you We’d love to discuss your vision further and share relevant portfolio examples. Let’s build something powerful together! Looking forward to your response. Best regards, Vishal Nasit
$325 USD in 10 Tagen
8,0
8,0

⭐⭐⭐⭐⭐ Build Automated Integration for PYN Booking and TTHotel Systems ❇️ Hi My Friend, I hope you're doing well. I reviewed your project requirements and see you're looking for a backend developer to create an automated integration between PYN Booking and TTHotel. You don't need to look any further; Zohaib is here to help you! My team has completed 50+ similar projects for hotel management systems. I will ensure a smooth integration that generates time-limited PIN codes for room access based on reservations. ➡️ Why Me? I can easily build your automated integration as I have 5 years of experience in backend development. My expertise includes API integration, middleware creation, and secure webhook handling. I also have a strong grip on Node.js and Python, ensuring a comprehensive approach to your project. ➡️ Let's have a quick chat to discuss your project in detail. I can provide samples of my previous work that demonstrate my skills. Looking forward to discussing this with you! ➡️ Skills & Experience: ✅ Backend Development ✅ API Integration ✅ Middleware Development ✅ Webhook Handling ✅ Node.js ✅ Python ✅ PHP ✅ Database Management ✅ Clean Code Practices ✅ Event Logging ✅ Error Handling ✅ Test Case Development Waiting for your response! Best Regards, Zohaib
$350 USD in 2 Tagen
8,0
8,0

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! Nikhil
$750 USD in 7 Tagen
8,1
8,1

Hi Andu, I propose to develop a middleware service that automates the integration between PYN Booking and TTHotel. The service will handle reservation events, generate time-limited PIN codes, and manage room access seamlessly. I will ensure secure webhook handling, clean code, and thorough documentation. Let's discuss the project details further. Regards, Sai Bhaskar
$330 USD in 10 Tagen
7,7
7,7

Hi, this is Elias from Miami. I’ve reviewed your project description and understand that the goal is to build a backend-only middleware that automatically syncs reservations from PYN Booking with TTHotel (TTLock) to generate, update, and revoke time-limited PIN codes for room access. I’ve worked on similar integrations involving PMS systems, smart-lock APIs, and event-driven workflows where accuracy, timing, and reliability are critical. With 10+ years of backend experience, I’m comfortable designing a reusable, deployment-ready service that securely handles webhooks, maps rooms to lock IDs, manages access windows, and communicates with guests via email/SMS—all without unnecessary complexity. I can deliver clean, well-documented code, a lightweight database for mappings, and clear setup instructions so this can be reused across multiple hotels. I’d love to discuss the details and propose the best architecture for long-term scalability. A few specific questions to align expectations: Q1: Does PYN Booking push events via webhooks in real time, or will the integration need periodic polling as a fallback? Q2: Should PIN codes follow a specific format/length policy, or can this be managed by TTHotel defaults per lock? Q3: For guest notifications, do you already have an email/SMS provider in mind, or should this be abstracted for easy swapping later? Looking forward to hearing from you. Regards, Elias
$500 USD in 7 Tagen
7,3
7,3

Hello, HAVE HANDS-ON EXPERIENCE WITH SUCH PROJECT I bring 11+ years of proven experience in backend integrations, hotel PMS systems, and secure API middleware, and I confidently understand your requirements. The goal is to deliver a scalable, user-centric auto check-in service that reliably syncs reservations with smart-lock access in real time. Core features -->> PYN Booking webhook handling -->> Room-to-lock mapping -->> Time-limited PIN generation via TTHotel -->> Auto update/revoke on changes -->> Guest notifications My approach follows clean architecture, secure webhook validation, efficient API integrations, and an agile, production-ready workflow. in chat as I have some queries to ask regarding the project to proceed further, and I will successfully implement this project from start-to-finish. Let’s come together and create a platform that propels your hotel operations and stands out prominently within the marketplace. Thanks & regards
$500 USD in 7 Tagen
8,0
8,0

I can build a secure, reusable middleware service to integrate PYN Booking with TTHotel, handling reservation create/update/cancel events and automatically generating, updating, or revoking time-limited PIN codes via the TTLock API. I have experience with REST API integrations, webhook handling, PHP/Node.js backends, error logging, and deployment-ready services. The solution will be clean, well-documented, and designed for reuse across multiple hotels. Happy to discuss preferred tech stack, timelines, and access to API documentation to get started. Best regards,
$500 USD in 7 Tagen
7,3
7,3

Hello As an experienced full stack and multi-solution developer, I am well-versed in the integration of APIs and have extensive experience working with backend development and REST APIs in general. Moreover, I posses a wide array of technical skills pertinent to your project, including the ability to proficiently code in languages such as Node.js, PHP, and Python. My familiarity with languages like Node.js can particularly be advantageous for your project due to its effectiveness in managing real-time requests, an ability that aligns well with your project's requirements for webhook handling. Furthermore, I firmly believe that past experiences provide insights into future performances. My 8+ years as a developer have granted me comprehensive experience in building similar automated-solutions like yours. Integrating various APIs, calculating access windows, generating PIN codes - these are familiar territories. I understand the need for clean, documented code undergirded by robust security protocols. My solid grasp on backend development ensures I bring more than just coding skills – expect reliability, scalability and error-resilience from my solutions. Lastly, your outlined expectations of a functional middleware service with thorough documentation aligns seamlessly with my approach to project delivery. Choose me - let's build a successful API-based system together! Best.
$250 USD in 3 Tagen
7,3
7,3

HELLO!! I READ YOUR REQUIREMENTS CAREFULLY AND UNDERSTOOD THAT YOU NEED A BACKEND MIDDLEWARE TO AUTOMATE ROOM ACCESS BETWEEN PYN BOOKING AND TTHOTEL, INCLUDING TIME-LIMITED PIN GENERATION, UPDATES, AND CANCELLATIONS. I WILL WORK ACCORDINGLY IN STAGES. I AM AN EXPERIENCED BACKEND DEVELOPER WITH 10+ YEARS OF EXPERIENCE IN NODE.JS AND PYTHON, SPECIALIZING IN API INTEGRATIONS, WEBHOOK PROCESSING, AND SECURE AUTOMATION SYSTEMS. I CAN DELIVER A CLEAN, DOCUMENTED, DEPLOYMENT-READY SERVICE WITH DATABASE MAPPING FOR ROOMS AND LOCKS, FULL EVENT LOGGING, AND ERROR HANDLING. I WILL PROVIDE 2 YEARS OF FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE. WE WILL WORK WITH AGILE METHODOLOGY AND I WILL ASSIST FROM INITIAL DESIGN TO PRODUCTION DEPLOYMENT, ENSURING THE SYSTEM IS REUSABLE FOR FUTURE HOTELS. I EAGERLY AWAIT YOUR POSITIVE RESPONSE. THANKS
$500 USD in 7 Tagen
7,4
7,4

Hello Andu T. Hope you are doing well! This is Efan , I checked your project detail carefully. I am pretty much experienced with MySQL, JavaScript, PHP, Backend Development, Software Architecture, Node.js, API Development and Python for over 8 years, I can update you shortly. Cheers Efan
$650 USD in 14 Tagen
6,8
6,8

Hey Andu T., I have experience building PMS-to-IoT middleware. The logic seems straightforward, but the critical failure point in lock integrations is Timezone Alignment and Webhook Reliability. If PYN sends UTC timestamps and the TTHotel lock expects Local Time, guests will be locked out upon arrival. Furthermore, if the TTHotel API times out (which happens), the system must not fail silently. My Technical Approach: Architecture: I will build this in Node.js (perfect for async webhook handling). I will use a lightweight database (SQLite or PostgreSQL) to store the dynamic mapping between PYN Room IDs and TTLock Lock IDs, making it easy to onboard new hotels later. Reliability: I implement a Retry Queue. If the TTHotel API fails to generate a code, the system will automatically retry 3 times before alerting an admin, ensuring 100% delivery. User Experience: I will add a configurable "Grace Period" logic (e.g., Check-out + 30 mins) to the validity window so guests aren't locked out while packing, while strictly enforcing check-in times. Relevant Experience: Built complex API integrations for fleet management and IoT hardware syncing. Developed secure, automated backend middleware for data processing. I'll start by reviewing the PYN Booking webhook documentation to confirm the payload structure. Sagar P.
$500 USD in 7 Tagen
6,9
6,9

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
$750 USD in 7 Tagen
6,7
6,7

Hi, I’m excited about the opportunity to build the automated integration between PYN Booking and TTHotel. With over 5 years of backend development experience, I have successfully implemented API integrations that involve complex workflows similar to your project. ### Relevant Experience: 1. **API Development:** Developed RESTful APIs in Node.js for a hospitality management system, handling hundreds of reservations daily. 2. **Middleware Solutions:** Designed middleware that processes real-time reservation updates, effectively managing dynamic data updates. 3. **Smart Lock Systems:** Integrated hotel access systems with third-party APIs, ensuring secure and efficient access management for guests. ### Proposed Steps: 1. Establish a secure connection with PYN Booking using webhooks. 2. Process reservation data and map room IDs to smart locks. 3. Utilize TTHotel API to generate time-limited PIN codes. 4. Ensure event logging and error handling for robustness. I’m looking forward to discussing how I can effectively contribute to your project. Thanks.
$299 USD in 7 Tagen
6,6
6,6

Hello, I’d be glad to assist with your project. I have experience handling similar work and will make sure everything runs smoothly from start to finish. My goal is to deliver quality results on time and ensure you’re completely satisfied with the outcome. Let’s connect to discuss your project details — I’m ready to get started right away. Best regards, Pallvi Gupta
$250 USD in 4 Tagen
6,4
6,4

Hello there, I can build a reliable middleware service that connects PYN Booking with TTHotel to automatically manage room access PIN codes. The system will receive reservation events from PYN Booking, map rooms to smart locks, generate time-limited PIN codes via the TTHotel API, and send them to guests by email. Updates and cancellations will correctly adjust or revoke access, with full logging and error handling. I will deliver clean, documented backend code (Node.js, Python, or PHP as preferred), a simple database for room–lock mapping, and clear setup instructions so the solution can be reused for future hotels. I will also include basic test cases for create, update, and cancel scenarios to ensure everything works smoothly. Regards, Rahul
$500 USD in 7 Tagen
6,7
6,7

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