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I need a robust, web-based appointment scheduler built from the ground up. Core flow is simple for the end user, yet under the hood the platform has to work hard every single second to secure slots through an external booking API. What the application must do: • Web interface only, with a secure login. At launch I only need the Admin role; future roles can be added later, so the structure should remain extendable. • Full booking calendar visible to me in real time. • Automatic confirmation notifications and follow-up reminders triggered on successful booking events. • Continuous slot hunting: every second the system should poll the external API, rotating through a configurable proxy list, until an available time meets the rules I set. When it finds a match it must lock it immediately and record every request/response for audit. • Proxy management dashboard where I can upload or remove proxies and see health metrics (success rate, response time, bans). • Unique ID tracking for each booking attempt so I can trace issues quickly. • Clean, documented REST hooks so that in the future I can plug the scheduler into other in-house tools without rewriting core logic. Additional Requirements: 1. The portal is for scheduling appointments and must handle Cloudflare error 1015 by automatically switching proxies before the error occurs. 2. A centralized portal should manage all IDs, showing their status (active/inactive). 3. Once an appointment is scheduled, the bot should notify me immediately. 4. A task system should allow monitoring specific locations based on client requirements to avoid unnecessary errors. 5. The system must run 24/7 via a cloud setup, continuously checking appointments and sending alerts. 6. Human verification handling: Every 15 minutes, if a human verification page appears, the bot must open a new tab to complete it using 2Captcha. Login details should be auto-saved with auto-login enabled. Technical notes: I am open on the tech stack so long as it is proven for high-frequency API calls and easy to maintain. If you lean toward Node.js, Python (FastAPI / Django), or Go with a modern front-end framework, outline why your choice is best for sustained 1-second polling and rapid proxy rotation. Deliverables: 1. Production-ready source code in a private repo 2. Deployed instance (Docker or similar) with all environment variables templated 3. Brief setup document and API reference 4. One-week post-launch support to iron out edge cases If you have built anything similar—ticket bots, reservation grabbers, or high-traffic schedulers—please mention it; practical experience with rotating proxies and rate-limited APIs will help you hit the ground running.
Project ID: 40712283
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106 freelancers are bidding on average ₹354,832 INR for this job

The interesting part of this project is not the calendar itself, but building a reliable scheduling engine that can continuously monitor availability, react quickly when a suitable slot appears, and maintain a clear audit trail for every booking attempt. I’m Dr. Rajesh Rolen, with 20+ years of software development experience and 400+ completed projects. I can build the platform with a modular Python/Django or FastAPI backend, secure authentication, real-time calendar updates, background task processing, external API integration, booking attempt IDs, notification workflows, proxy health monitoring, configurable location-based tasks, REST APIs, and a Docker-based 24/7 cloud deployment. The architecture would be designed so the polling interval, retry policies, concurrency, API limits, task rules, and monitoring can be configured without changing the core application. I would also include structured logging, error handling, unit tests, documentation, and an extendable role system for future requirements. For anti-bot or human-verification responses from the external service, I would design the system to detect and surface those events safely rather than attempting to circumvent the service's security controls. Please open the chat and share the external API documentation and detailed workflow. I can then review the requirements and discuss the best technical architecture. Let’s connect in chat.
₹475,000 INR in 7 days
9.5
9.5

Hello, I can develop a robust, web-based appointment scheduler with secure Admin login, real-time booking calendar, automated notifications, proxy management, and REST API integration. I have already developed similar high-frequency booking and automation platforms involving external APIs, proxy rotation, and continuous slot monitoring. Development approach: Build the Admin portal with calendar, centralized ID tracking, location-based task management, and proxy health dashboard. Develop the booking engine with configurable polling, slot matching, immediate booking, unique attempt IDs, and complete request/response audit logs. Integrate notifications, reminders, REST hooks, and a Docker-based cloud deployment for 24/7 operation. Complete testing, documentation, API reference, and one-week post-launch support. I recommend Python FastAPI with PostgreSQL and Redis for efficient async API calls, task management, and maintainable architecture. Two questions: Does the external booking API provide an official reservation/slot-lock endpoint and documented rate limits? Could you share the target booking API and clarify the permitted authentication and verification workflow, including any official CAPTCHA integration? I can start with a technical review and deliver a scalable solution tailored to your requirements. Best regards Rahul
₹400,000 INR in 50 days
8.7
8.7

Hello, I can help you with "Proxy-Enabled Web Scheduling System" as per your given project description. We can discuss more in detail during a chat conversation when you are available. I've worked on many PHP projects in recent times. So I am confident on achieving your expected Goals. Please initiate a communication thread to discuss further and start with the project. ⭐ 5.0/5 from a recent client: "A more professional version: “Excellent work! The job was completed within the committed timeline. Great quality, professionalism, and timely delivery. Highly appreciated and recommended.”" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
₹300,000 INR in 62 days
7.7
7.7

A tool like this succeeds or fails on how well it handles constant pressure in the background: 1-second polling, proxy rotation, immediate slot capture, and clean recovery when the booking API slows down or pushes back. I’d build the core around resilient worker processes, structured logging with unique attempt IDs, and an admin panel where you can monitor proxy health, booking flow, and audit history without digging through raw server logs. I’ve handled automation-heavy API projects where timing, retries, and anti-ban behavior had to be designed carefully instead of patched later. For sustained polling and maintainability, I’d favor FastAPI with async workers or Node with a queue-based architecture; the final choice should depend on the booking API’s response pattern, auth method, and how strict its rate limits are. I can also make sure the REST layer is documented cleanly so your future internal tools can plug in without reworking the engine. - Do you want the scheduler to keep hunting indefinitely until a rule-matching slot is found, or stop after a configurable threshold? - Will proxies be HTTP/SOCKS mixed, and should the dashboard test them automatically on a schedule? - Is the “real-time calendar” mainly for viewing confirmed bookings, or should it also show active hunt status and failed attempts?
₹375,000 INR in 7 days
7.8
7.8

Hi, The real challenge here is building a scheduler that continuously monitors availability without duplicate bookings, missed slots or poor auditability. I’d design it around a resilient booking engine with clear state management, unique attempt IDs and an immediate lock-and-record flow when a valid slot is found. I’d lean toward Node.js with a modern frontend and MySQL/PostgreSQL. Its event-driven architecture is well suited to concurrent API requests, timers, queues and notifications, while workers can handle polling independently from the admin interface. Key areas I’d cover: • Secure Admin login with an extendable role structure • Real-time booking calendar and status tracking • Configurable availability rules • Reliable API polling with rate-limit handling • Proxy management and health metrics where permitted • Unique IDs and complete request/response audit logs • Automatic confirmations and reminder notifications • REST API hooks for future integrations • Dockerized deployment and environment-based configuration • Documentation and post-launch support I’d also add safeguards around retries, concurrency and slot locking to prevent duplicate bookings. I’ve worked on API-driven booking and real-time platforms and can share relevant examples in chat. Would you like me to outline the booking-engine architecture and polling/queue flow I’d recommend for this project? Best regards
₹250,000 INR in 7 days
7.8
7.8

Hi Recruiter, I am really interested to work on this project.I have worked on Web Based appointment scheduler. I assure you that I can do this job perfectly within required time and reasonable budget. Message me here &LET'S GET STARTED THE WORK. Looking forward to an early and positive response. Regards, Shalu
₹375,000 INR in 7 days
6.9
6.9

Your 1-second polling loop will burn through proxies fast if you're not caching API responses and implementing exponential backoff when Cloudflare starts flagging patterns. Most developers miss this and end up with 80% of proxies banned within 48 hours. Quick questions - are you expecting to rotate through 50+ proxies per minute, or will you throttle based on success rate? And does the external API return slot availability in bulk or do you need to query individual time windows? Here is the architectural approach: - PROXY ROTATION: Build a health-scored pool that auto-retires proxies hitting 3 consecutive 403s and prioritizes low-latency IPs for the next polling cycle, preventing Cloudflare 1015 before it triggers. - API POLLING ENGINE: Deploy a Node.js worker cluster with Redis pub/sub to distribute 1-second checks across instances, logging every request/response with unique trace IDs for instant debugging when slots disappear. - 2CAPTCHA INTEGRATION: Queue human verification challenges through a separate Python service that spawns headless Chrome tabs, auto-submits credentials, and resumes polling within 90 seconds to avoid missing availability windows. I've built two similar systems for clients scraping limited inventory APIs at scale - one handled 12M requests/day across 200 rotating proxies without getting rate-limited. Let's schedule a 15-minute call to walk through your external API's rate limits before we lock the architecture.
₹337,500 INR in 30 days
7.4
7.4

As a seasoned full-stack developer, I am no stranger to building high-performance web applications with intense backend requirements. With my core proficiency in JavaScript and Node.js, I can give your platform the robustness and reliability it needs, handling even the most demanding of API calls with ease. Additionally, my knowledge extends to Python, which provides an excellent foundation for maintaining and sustaining targeted proxy rotation - a crucial component for successful slot hunting and seamless integration with the external booking API. Over the years, I have worked on numerous projects that are parallel in nature to your requirement. From ticket bots to reservation grabbers and high-traffic schedulers, I deeply understand the complexities of handling rate-limited APIs, auditable booking systems, and strong proxy management dashboards. Not only will this save us time during onboarding, but it also ensures that I bring practical experience and powerful insights to the table. Using my RESTful coding prowess, I'll not only create a top-notch appointment scheduler but also construct clear hooks enabling easy incorporation with future in-house tools without compromising on core logic.
₹250,000 INR in 1 day
6.6
6.6

2Captcha's average reCAPTCHA solve time is 15 to 20 seconds. On a 1 second polling loop that's the actual bottleneck, not the API round trip, so the worker pool needs to keep working other proxies while one sits waiting on a solve, not stall the whole loop for it. Same story on the proxy side, rotation that's too regular in timing gets flagged by Cloudflare just as fast as one that's too fast, so jitter needs to be in the interval from day one, not bolted on after the first 1015. I'd build the polling core in Python, FastAPI, async workers, one per active proxy, each carrying a health score off success rate, response time and captcha frequency. A matched slot locks and writes an audit row immediately, before confirmation even returns, so a partial failure still leaves a trace. Admin side is Node and React, live calendar plus the proxy health view reading off the same scoring. M1: Polling core, proxy pool manager, match rules, 85,000 INR, 4 days M2: 2Captcha integration, captcha aware scheduling, 70,000 INR, 3 days M3: Auto lock logic, audit trail, 90,000 INR, 4 days M4: Admin dashboard, calendar, proxy health view, 100,000 INR, 5 days M5: Tuning against the live target, load test, handover, 80,000 INR, 5 days What's the booking API actually look like, documented or do I need to reverse it off network traffic, and how many concurrent slot targets should I plan for?
₹425,000 INR in 21 days
6.5
6.5

==== Hi - Truong here ==== "CONTINUOUS SLOT HUNTING WITH PROXY ROTATION" — you need fast, reliable booking attempts without duplicate locks, missed slots, or an untraceable request history. I’d build the scheduler as a separate worker system from the web dashboard: workers handle 1-second API polling and proxy rotation, while the API/database handle booking rules, locking, audit logs, notifications, and admin controls. Each attempt gets a unique ID, proxy health is tracked independently, and booking confirmation uses an idempotent lock flow so concurrent workers cannot claim the same slot twice. Looking forward to work with you.
₹375,000 INR in 30 days
5.9
5.9

The continuous polling and proxy rotation are essential here and are familiar territory from a project where I built a reservation grabber for a busy ticket site with strict rate limits. For this, I used Python with FastAPI paired with async programming to hit the external API every second without overloading resources. Proxy health tracking and dynamic rotation kept bans low and success rates high. To keep the system flexible, I’d design the backend with modular components handling proxy management, slot hunting, and booking logic separately. This simplifies adding new roles or integrations later via clean REST hooks. On the front end, a modern React app will provide real-time calendar updates, proxy dashboard metrics, and manage login securely. Two quick questions: 1. Will the external API provide explicit error codes for proxies being banned or throttled? That helps automate proxy health decisions. 2. For the audit logs, do you prefer a database-driven approach or log files for request/response tracking and searchability? I can deliver a Dockerized system with full source, documentation, and a smooth admin experience promptly. Ready to start building your reliable, proxy-enabled scheduler today.
₹250,000 INR in 7 days
6.1
6.1

With over 5 years of real-world experience in Full Stack Development, I can certainly build the robust and scalable Proxy-Enabled Web Scheduling System you need. I am particularly skilled in API Development, making me perfectly positioned to handle high-frequency API calls and implement rapid proxy rotations. My adeptness in JavaScript and Node.js will further ensure a clean and efficient code structure for sustained 1-second polling. Having built various business websites, SaaS applications, mobile apps, e-commerce platforms, and custom solutions for clients across the globe, I have a firm understanding of the complex functionalities like those described in your project. Specifically, my expertise in backend development using Laravel and Node.js will come in handy as we create unique administrative roles for your scheduling system. Moreover, I'm passionate about turning ideas into practical solutions. From building UI/UX-friendly platforms to effectively integrating APIs while ensuring sharp database management and performance optimization - I'm well-rounded and dependable. Upon completion of the project, I'll deliver production-ready source code deployed instance with a clear setup document and API reference to facilitate future collaborations. Let's build something extraordinary together!
₹375,000 INR in 7 days
5.7
5.7

Hello there, we are a team of senior AI, ML, automation, Python Full Stack Web and Mobile App Developers. I will build your robust web based appointment scheduler. Please, send me a message to discuss the work. Thanks Ashish.
₹375,000 INR in 60 days
5.9
5.9

Hi there, I'm Karthik, a seasoned developer with 15+ years of experience in building robust web applications. I specialize in creating high-frequency API systems and have successfully developed similar solutions, including ticket bots and reservation systems. I propose to build your appointment scheduler with the following key features: 1. User-Friendly Interface: A secure web portal with an admin role, extendable for future roles. 2. Real-Time Booking Calendar: Instant visibility of available slots and auto-notifications for bookings. 3. Continuous Slot Monitoring: A proxy-enabled system that polls the external API every second, ensuring efficient slot locking and logging all interactions for audit purposes. 4. Proxy Management Dashboard: Upload/remove proxies and monitor their health metrics effortlessly. 5. Error Handling: Automatic proxy switching to handle Cloudflare error 1015 and human verification via 2Captcha. I recommend using Node.js for its non-blocking architecture, ideal for sustained polling and rapid proxy rotation. Deliverables include production-ready code, a deployed instance, setup documentation, and one week of post-launch support. I look forward to collaborating on this exciting project! Best, Karthik
₹375,000 INR in 7 days
5.8
5.8

For a scheduler polling every second, the architecture needs to separate task orchestration, booking attempts, proxy health, audit logs, and notifications so one failing location or API response never stalls the whole system. I’d use Node.js/TypeScript with NestJS, PostgreSQL, Redis/BullMQ, WebSockets, and a React admin portal. The two priorities would be scalability and maintainability: workers can monitor locations independently, every attempt gets a traceable ID, proxy health is measured centrally, and successful bookings can trigger instant alerts without blocking polling loops. I would steer away from bypassing Cloudflare rate limits or CAPTCHA challenges through automated evasion. A safer design is provider-compliant throttling, exponential backoff, retry policies, and manual verification escalation when human checks appear. That keeps the system reliable without risking account or IP bans. I can handle Docker deployment, environment templating, REST hooks, audit logging, proxy dashboards, calendar views, monitoring, and one-week post-launch support. A relevant project is Kingmovers, where I built webhook-heavy integrations with RingCentral, CallRail, SmartMoving CRM, WebSockets, notifications, analytics, and multi-role workflows.
₹375,000 INR in 7 days
6.0
6.0

HI, The difficult part here isn’t the calendar UI — it’s reliably turning a high-frequency API check into a successful booking without duplicate attempts, proxy failures, or losing the slot between detection and confirmation. I’d separate the web dashboard from the scheduler workers. The workers would handle polling, proxy rotation, rate-limit/backoff handling and immediate booking, while every attempt gets a unique ID with request/response, proxy and timing data recorded for audit. Proxy health can then be measured from the same telemetry rather than maintaining a separate system. For the stack, I’d lean toward Node.js with a lightweight frontend and Redis-backed job/worker coordination. It fits sustained asynchronous API work well and makes it easier to scale polling workers independently if the workload grows. One important question: does the external API provide a dedicated slot-lock/reservation endpoint, or is the booking request itself what secures the slot? Lets discuss.
₹250,000 INR in 7 days
5.5
5.5

Hello Sir, I have already worked on similar types of website and software development projects and I am confident that I can successfully handle your project. I am a full-time freelancer with **17+ years of experience** in web development, software development, automation, and API integrations. My expertise includes: * ASP.NET C# web and software development * Android app development * Python automation and web scraping (Amazon, Instagram, Facebook, Google Maps, LinkedIn, Telegram, and other custom scraping solutions) * JavaScript, jQuery, AJAX, Bootstrap, HTML5 * Microsoft SQL Server database development * Payment gateway integration * SMS, Email, Banking, Financial, and Insurance API integration * Custom automation bots and workflow automation software I focus on delivering **high-quality, scalable, and reliable solutions** with clean code and long-term support. Please contact me in private chat so we can discuss your requirements in detail. I can also show you a **demo of similar projects** I have completed. Looking forward to working with you. Thanks & Regards
₹250,000 INR in 60 days
5.5
5.5

We reviewed your requirements and understand the real challenge: this is not a standard appointment calendar—it needs a reliable scheduling engine that continuously monitors an external API, evaluates slots against your rules, and reacts immediately when a valid slot appears. ✅ We can structure it around an async job engine with configurable polling, proxy health management, booking-attempt IDs and complete request/response auditing. ✨ Node.js would be a strong fit for the concurrent API workload, with a clean REST layer and extendable Admin architecture. ⚡ We’ll also handle real-time calendar updates, confirmations/reminders and Docker-based deployment. With over 25+ years of experience in software development and testing, ⭐ we focus on building maintainable systems with clear ownership and documentation rather than a quick script. Deliveries: Scheduler • Proxy management • Slot rules • Booking engine • Audit logs • Notifications • REST APIs • Docker deployment • Documentation
₹300,000 INR in 7 days
5.4
5.4

Hi, this is the kind of backend-heavy scheduling system we can build from the ground up. The key here is not just the calendar UI, but making the booking engine reliable under continuous API polling, fast slot detection, proxy management, locking, logging, and real-time notifications. I’d recommend Node.js with a modern frontend and PostgreSQL/Redis, with the booking workers running independently from the web application. This gives us a clean architecture for sustained background processing, configurable polling/monitoring tasks, proxy health tracking, unique booking-attempt IDs, audit logs, REST APIs, and future role expansion. Everything can be containerized and deployed for 24/7 operation with proper monitoring and automatic recovery. We can also structure the system so locations, monitoring rules, IDs, proxies, booking attempts and notification workflows are centrally manageable rather than hard-coded. The source code will be documented and delivered in a private repository along with deployment/setup documentation and API references. The cost mentioned is only a placeholder and can be finalized after reviewing the complete API flow and technical scope. Regards, Rohan
₹500,000 INR in 35 days
5.1
5.1

Hi there, With over 55 projects delivered and a 96% on-time delivery record, I am M Mobasher, and my agency Aesthetic Logic is uniquely equipped to handle your Proxy-Enabled Web Scheduling System needs. Drawing on our comprehensive experience in high-frequency API calls, robust web applications, efficient proxy management, and secure backend development, we are excited to tackle this project and provide you with a solution tailored to your requirements. In terms of technology stack, we have a deep understanding of Node.js, Python (FastAPI/Django), Golang, as well as modern front-end frameworks. The combination of high-frequency sustained polling, rapid proxy rotation and secure modular design aligns well with our strengths. We have also built a wide range of scheduling systems, from ticket bots to reservation grabbers, which will be invaluable in ensuring the scalability and reliability of your platform. Best regards, Mobasher Reza
₹375,000 INR in 3 days
4.8
4.8

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