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IMPORTANT - READ CAREFULLY BEFORE APPLYING This is a serious technical project. We are hiring ONE INDIVIDUAL developer only. NO agencies, software companies, outsourcing teams, middlemen, project managers, or resellers You must personally do the work yourself. If you outsource work, hide behind a team, assign the work to someone else, or act as an intermediary -DO NOT APPLY This project requires strong technical understanding, debugging ability, backend architecture skills, reliability engineering, and production-quality coding practices. After successful completion, there is strong potential for long-term/full-time work --- ## PROJECT OVERVIEW We already have: * Existing Tampermonkey automation logic/script * Existing Admin Panel (READY) * Existing Operator Panel (READY) * Existing Agent Panel (READY) **Frontend is already completed.** ### IMPORTANT: **NO frontend development is required.** Your job is: **Convert the existing Tampermonkey automation backend logic into a clean, modular, maintainable Node.js backend and integrate it with the already completed frontend panel.** This is NOT a greenfield project. This is NOT “build everything from scratch.” This is a **logic conversion + backend reconstruction task**. The goal is to: > faithfully preserve the existing automation workflow behavior while rebuilding it into a clean, maintainable, scalable Node.js backend architecture. You must understand how to convert working automation logic into production-quality backend systems **without breaking behavior**. --- ## CORE REQUIREMENT — LOGIC CONVERSION FIDELITY You will receive an existing automation script. Your responsibility is to: ### Preserve Existing Workflow Behavior The converted Node.js backend must preserve: * Existing flow behavior * Workflow sequence * Timing-sensitive execution * Retry behavior * Request order * Logic dependencies * Stability expectations This project is NOT about redesigning the logic. The objective is: > Convert the existing workflow into maintainable Node.js backend architecture while preserving behavior and improving reliability. Messy copy-paste code or browser-only hacks are not acceptable. --- ## EXPECTED WORKFLOW LOGIC (MUST UNDERSTAND BEFORE APPLYING) The current workflow follows a multi-step execution system. Expected workflow: 1. Login / authentication 2. OTP handling and verification 3. Availability checking 4. Slot reserve/initiate process 5. Booking confirmation flow 6. Payment handoff + verification handling (if applicable) 7. One successful end-to-end test execution using provided credentials You must understand: * Multi-step workflow orchestration * Async execution * Session management * State handling * Reliability under timing-sensitive operations * Retry handling * Failure recovery If you do not understand timing-sensitive multi-step systems, **do not apply**. --- ## EXISTING PANEL INTEGRATION (MANDATORY) The frontend already exists. Admin / Operator / Agent panels are completed. Your responsibility: * Build backend APIs * Connect Node.js backend to existing frontend * Integrate workflow execution * Support existing frontend functionality * Ensure backend stability and maintainability Again: **No frontend redesign or frontend development is required.** Backend integration only. --- ## TIMING, RELIABILITY & STABILITY REQUIREMENTS Special attention must be given to: * Timing-sensitive workflow execution * Stable multi-step execution * Retry mechanisms * Queue/task execution * Failure recovery * Logging and debugging * Reliability under repeated execution * State/session consistency We care about **stability and maintainability**, not fragile scripts. If your code breaks under repeated execution, the project will not be accepted. --- ## NODE.JS BACKEND REQUIREMENTS The implementation must include: * Clean Node.js architecture * Modular folder structure * Maintainable code * Logging system * Retry logic * Error handling * Queue/task execution system * Session management * Config-based setup * Async execution handling * Debuggable architecture * API integration for existing frontend Messy single-file implementations will be rejected. Low-quality copy-paste backend code will be rejected. --- ## LOCAL EXECUTION & VERIFICATION REQUIREMENT After successful conversion: You must: * Run the Node.js system locally * Integrate it with the provided frontend * Verify end-to-end workflow execution * Debug failures until stable Final milestone requires: > successful supervised end-to-end validation using provided verification credentials after local integration/testing. You must be comfortable debugging and fixing issues until the workflow becomes stable. --- ## REQUIRED TECHNICAL SKILLS You MUST have strong experience with: * Node.js backend development * Complex workflow systems * Async programming * Multi-step execution systems * Session handling * Logging/debugging * Retry/failure recovery * Queue/task systems * API integration * Production backend architecture Bonus: * React / [login to view URL] integration * PostgreSQL / MySQL * Monitoring systems --- ## STRICT RULES — DO NOT APPLY IF * You are an agency/company * You outsource work * You only know Selenium/browser automation * You only know beginner scraping * You cannot explain debugging technically * You cannot explain retries/failure recovery * You cannot structure maintainable Node.js systems * You cannot work milestone-based * You cannot produce clean production-quality code Generic proposals will be rejected instantly. Low-effort bidders will be ignored. --- ## REQUIRED QUESTIONS (MUST ANSWER ALL) 1. Confirm you are an **individual developer** and NOT an agency/company. 2. Describe a similar workflow/backend system you personally converted or built. 3. Explain how you would convert an existing automation workflow into a maintainable Node.js backend while preserving behavior. 4. How would you structure the backend architecture? 5. How do you preserve workflow behavior during logic migration? 6. How do you handle retries, failures, logging, debugging, and recovery in timing-sensitive systems? 7. How do you validate that a multi-step workflow is stable instead of fragile? 8. What Node.js architecture would you recommend and why? 9. Provide proof of previous technical work (GitHub, portfolio, code sample, technical writeup, demo, etc.). 10. Explain one difficult technical bug you personally solved. 11. Are you comfortable with milestone-based delivery and technical verification? --- ## MANDATORY SCREENING To be considered: You must explain: * How you would analyze existing automation logic * How you would rebuild logic into Node.js while preserving behavior * How you debug timing-sensitive workflow failures * How you structure maintainable backend systems * How you ensure reliability and stability Copy-paste proposals will be rejected. We are hiring based on technical skill, reliability, communication, debugging ability, maintainability, and ability to deliver clean backend systems. Strong performance on this project may lead to full-time work.
Project ID: 40470767
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30 freelancers are bidding on average ₹203,462 INR for this job

Hey, I will convert your Tampermonkey automation logic into a modular Node.js backend — preserving every workflow step, timing dependency, and retry behavior — then integrate it with your existing Admin, Operator, and Agent panels via clean APIs. For the architecture, I will isolate each workflow stage (auth, OTP, availability check, slot reserve, booking, payment) into its own service module with a central orchestrator managing state transitions. Each step gets wrapped in a retry handler with configurable backoff, and a finite state machine tracks execution progress — so if step 4 fails, recovery resumes exactly there instead of restarting the entire flow. I will add structured logging at every transition point to make debugging timing-sensitive failures straightforward. Ready to start whenever you are. Kamran
₹167,802 INR in 25 days
8.1
8.1

Having tackled and delivered numerous complex projects similar to yours, my team at STR Softwares LLP has the skills and expertise you need for this project. With a strong background in automation, data extraction, and intelligent solutions, we are well positioned to transform your existing Tampermonkey backend into a clean, maintainable Node.js solution without sacrificing workflow fidelity. We will refactor your backend architecture systematically yet meticulously to guarantee that every aspect of your existing workflow is maintained while improving upon stability and maintainability through our Node.js expertise. Whereas many backend developers may provide careless or 'quick-fix' solutions that only work on the surface level or in specific circumstances, we are committed to delivering high quality code that holds up under any circumstance - even repeated execution. Our approach involves building stable multi-step executions, implementing retry mechanisms and queue/task execution intelligently to ensure state/session consistency within your system. We won't simply vanish once the initial task is done but rather stretch ourselves even further to support existing frontend functionality with newly built backend APIs, integrate workflow execution seamlessly into your already completed frontend panels, improve logging and debugging mechanisms for easier maintenance in addition to ensuring overall backend stability and maintainability.
₹200,000 INR in 30 days
6.7
6.7

Hello, I am an individual Node.js backend developer, not an agency, and I would personally handle the conversion of your existing Tampermonkey logic into a clean backend without outsourcing. I have built timing-sensitive multi-step backend workflows involving login, OTP/session handling, retries, queue-based execution, logging, and recovery, so I understand the need to preserve exact request order, delays, dependencies, and existing behavior instead of redesigning the flow. My approach would be to first trace the current script step by step, document states and failure points, then rebuild it into modular Node.js services with controllers, workflow executors, queue/tasks, config, session storage, structured logs, retry policies, and APIs connected to your existing Admin, Operator, and Agent panels. I would validate stability through repeated supervised end-to-end runs, comparing the converted backend behavior against the original workflow, debugging timing issues until the process is reliable. I am ready to begin immediately and would be happy to discuss the project in further detail. Thanks, Teo
₹222,000 INR in 40 days
6.4
6.4

Hi there, I’ve reviewed your Node.js project requirements and would love to help. With 5+ years of experience in backend and API development, I specialise in building fast, scalable, and secure applications using Node.js, Express, and MongoDB. I’ll start with a clear architecture plan, provide regular progress updates, and ensure the solution is well-tested, efficient, and production-ready. Let’s connect to discuss your project in detail — I’m ready to get started! Best, Bhargav Node.js Developer | Backend & API Expert
₹200,000 INR in 20 days
5.8
5.8

Hello there, We will convert your Tampermonkey automation logic into a modular Node.js backend, preserving every workflow step (login, OTP, availability check, slot reservation, booking, payment) and wire it into your existing panels via clean APIs. For the migration, we will map each automation step into its own service module with a shared state machine controlling execution order. Each step will carry retry logic with exponential backoff, structured logging per execution run, and a queue system (BullMQ or similar) to manage concurrency. This keeps timing fidelity intact while making failures traceable and recoverable. A couple of quick things to confirm: 1) Is the existing Tampermonkey script interacting with third party APIs directly, or does it rely on browser DOM events that will need equivalent HTTP calls? Ready to start whenever you are. Faizan
₹172,071 INR in 25 days
5.0
5.0

Hello, As an experienced Full Stack Web & Mobile App Developer with strong command over Node.js backend development, I believe I'm the ideal fit for your project. With 5+ years of hands-on experience, I've built multiple complex applications from scratch, delivering maintainable, modular, and scalable code—exactly what your project demands. I deeply understand the importance of timing-sensitive execution, retry mechanisms, and proper logging for stable multi-step workflows. My work philosophy is simple: clean code quality, zero fragility, rigorous error handling, structured logging, and easy long-term maintenance. For your existing panel integration: My scope will strictly be backend API development. No frontend work or redesign needed—I'll seamlessly connect the Node.js backend with your already-completed frontend panels, ensuring full stability and smooth communication between layers. What I deliver: ✓ Clean Node.js architecture with modular folder structure ✓ Robust error handling & retry logic ✓ Logging system for easy debugging & monitoring ✓ Scalable, maintainable, well-documented code ✓ End-to-end support—from development to deployment ✓ Web hosting assistance included Beyond coding, I bring clear communication, on-time delivery, and genuine passion for turning ideas into reliable products. Let's discuss your project further and build something great together!
₹150,000 INR in 7 days
5.1
5.1

As an experienced and dependable developer with over 7 years in the field, I am confident in my ability to undertake this challenging project and deliver robust results. Having successfully completed 575+ projects with a 5-star rating, I know how to develop maintainable, scalable, and clean Node.js architectures(reiterating your core requirement). Additionally, my expertise in PostgreSQL and backend development allows me to create APIs that integrate flawlessly with existing frontends(your mandatory requirement) while ensuring stable workflows and preserving logic behavior. Throughout my career, I have developed deep-rooted problem-solving skills and had extensive experience handling complex, multi-step workflows–skills that are essential for this project. These experiences make me well-versed in asynchronous execution, state management, timing sensitiveness, and retry/failure handling within backend architecture(I understand your expected workflow logic deeply). Moreover, my proficiency with queue management, error handling(routing/retry logic), logging system development(logging and debugging), and prioritizing stability over fragile scripts(documenting failure recovery & maintaining session consistency) aligns perfectly with your need for reliable code under repeated execution. You won't just be getting clean code but also rigorous testing thanks to these skills. I'm also available for discussions on t-intensive strategy or weekly updates if required.
₹200,000 INR in 30 days
4.5
4.5

Hi there, I am M Mobasher and I believe my extensive web development and problem-solving experience makes me an excellent candidate for this role. Over the years, I have honed my skills to include Node.js, API integration, and MySQL which are key technologies required for this project. My mastery in these languages has been instrumental in building clean and modular architectures that are as maintainable as they are scalable. Moreover, the fact that I have a diverse tech background enables me to approach every project with a holistic lens, taking into account not just the coding part but every aspect of its functionality. From timing-sensitive multi-step systems and state handling to failure recovery and queue/task execution - I understand them all inside out because I have worked implementing similar solutions in the past. And most importantly, I ensure stability and maintainability right from the start so that repeated execution isn't a vulnerability of the system like with fragile scripts.
₹200,000 INR in 3 days
4.0
4.0

Hello, I carefully reviewed the full project scope and understand that this is not a basic automation rewrite, but a production grade backend reconstruction focused on preserving workflow behavior while improving architecture, stability, and maintainability. 1. I confirm I am an individual developer, not an agency or intermediary. 2. I have worked on timing sensitive multi step workflow systems involving authentication, OTP handling, async queue execution, retries, session persistence, and recovery logic for high reliability backend platforms. 3. My approach would begin with detailed workflow tracing of the existing Tampermonkey logic, mapping request order, timing dependencies, retries, session flow, and state transitions before rebuilding modular Node.js services preserving exact behavior. 4. Recommended architecture: • Workflow orchestrator layer • Queue and retry manager • Session manager • API service layer • Logging and monitoring layer • Config driven execution system Software expertise: Node.js, Async Systems, Workflow Orchestration, Queue Systems, Session Management, API Integration, Logging Systems, Retry Recovery Architecture, Backend Refactoring. Thanks Arun
₹250,000 INR in 7 days
3.5
3.5

Hi, I am an individual Full-stack Developer, not an agency or intermediary. I have strong experience with Node.js backend systems, async workflow orchestration, API integrations, retry/recovery systems, and production-grade architecture. I understand this project is about faithfully converting existing automation logic into a clean, stable, maintainable backend without breaking workflow behavior. Let's connect to discuss the details. I'm ready to start immediately! Best, Uttam
₹200,000 INR in 7 days
3.4
3.4

✨✨✨✨✨Hi, I can start working right now. I’m an individual developer, not an agency, and I have strong experience with Node.js backend systems, workflow automation, API integrations, async processing, retry logic, logging, and failure recovery. I understand that this project is about converting existing Tampermonkey automation logic into a clean, modular Node.js backend while preserving the exact workflow behavior, timing, session handling, and stability. My approach is to analyze the current script step by step, map the workflow logic, rebuild it into modular services, add queue/retry systems, logging, session management, and API integration with your existing frontend, then run end-to-end testing until the system is stable and reliable under repeated execution. I work with professionalism and responsibility, ensuring clean architecture, maintainable code, debugging visibility, and production-ready backend reliability. Let’s connect via chat to discuss the project requirements further. Regards,
₹200,000 INR in 7 days
2.3
2.3

Though high is a mount, it's just under the sky, Able to top it, if given an unremitting try, But thou not try, only saying it's too high.
₹150,000 INR in 7 days
1.5
1.5

This project stands out because it’s not just a script conversion. it’s really about preserving a timing-sensitive automation workflow while rebuilding it into a stable, maintainable backend architecture. I’d approach this by first mapping the current workflow dependencies and timing logic, then rebuilding it into a modular Node.js system with proper queues, logging, persistence, and API integration for your existing frontend panels. I’m comfortable working milestone-based, debugging complex async systems, and validating end-to-end stability under repeated execution. While I’m new to Freelancer, my focus is building strong reviews by delivering high-quality work
₹200,000 INR in 30 days
0.0
0.0

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