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Project Description I run a live algorithmic trading signal platform (Node.js backend on a Linux VPS, React Native mobile app, Firebase auth) for Indian equity markets. The system is in production and needs a reliable freelancer for ongoing maintenance and a handful of specific fixes. System overview: Node.js/Express backend on a VPS, managed via PM2, fronted by NGINX with SSL File-based data storage (no database) — signals written/read from JSON files on disk Firebase for authentication, with a payments integration React Native (Expo) mobile app consuming the backend API Integrates with a third-party broker API for trade execution What I need: Ongoing maintenance — monitoring PM2 processes, restarting on crashes, checking logs for errors, basic server housekeeping (disk space, log rotation) Bug fixes — [INSERT SPECIFIC ISSUES HERE, e.g. "signal data occasionally not refreshing in the app," "duplicate/conflicting data-generator scripts need reconciling," "deep-link handling for one broker integration is broken"] Ability to debug Node.js server code and React Native app code confidently — not just restart services Requirements: Strong Node.js and Linux server experience (PM2, NGINX, SSH) Comfortable with Firebase (Auth/Firestore) React Native/Expo familiarity is a plus Available for periodic remote login sessions (screen share or SSH), not necessarily full-time Discretion required — you'll have access to a live financial application; NDA will be required before credentials are shared Deliverables: Website Mantainence Bug Fixes
Project ID: 40565154
39 proposals
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Active 6 days ago
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39 freelancers are bidding on average ₹4,599 INR for this job

Hi there, I see you need assistance with maintaining your live algorithmic trading signal platform. With extensive experience in Node.js backend development and React Native app maintenance, I'm well-prepared to help you address current issues and ensure the smooth operation of your platform. Understanding the critical nature of financial trading applications, I will carefully analyze the existing infrastructure and resolve any specific issues you're facing. The focus will be on optimizing your Node.js backend running on a Linux VPS, reinforcing security measures, and ensuring efficient data handling through JSON. Meanwhile, the React Native app will be fine-tuned for a seamless user experience, with enhancements where necessary to support Firebase authentication. My approach involves thorough debugging, followed by proactive maintenance to prevent future issues. By integrating continuous updates and performance monitoring, we will keep your system responsive and reliable for your users in the Indian equity markets. If given the opportunity, I aim to provide detailed technical insights and enhance the robustness of your platform. Best Regards, Khorshed Alam, RS Software
₹1,800 INR in 10 days
8.1
8.1

Hi I will be able to help you. Please message me so that we will have detail technical discussion. I have 9+ years of combined experience in Mobile Application development in Native on Android Java, kotlin and IOS Swift, and For Hybrid Cross platform on Flutter Dart & React- Native and for web and backend on react js and node js, Python Django and php CodeIgniter mvc and Laravel. Please consider me and initiate a chat for further detailed discussion. Regards, Anju Logical Soft Tech Pvt Ltd, Indore(M.P)
₹30,000 INR in 14 days
6.5
6.5

With over a decade of experience building and maintaining high-performance mobile and web applications, I am the right fit for your Node.js backend and React Native app maintenance project. I have a thorough understanding of Node.js, Linux server management (PM2, NGINX, SSH), and Firebase (Auth/Firestore) - all of which are integral to your system. Of course, my familiarity with React Native/Expo is a major bonus as well. My stint at Google and Apple has ingrained in me an efficient reliability-focused approach, that I think makes me perfect for ongoing maintenance - monitoring, error-checking, regular log rotation, amongst others. Being able to quickly debug issues is my strong suit; not only will I restart services but also dig deep into the code to identify the problem's root cause. I handle projects from revamps to new apps deftly. We can start with a thorough code review followed by an improvement plan focusing on your project's specific needs. Delivering faster, cleaner and scalable solutions have consistently helped my clients launch polished products in significantly less time. And absolute discretion being a requisite, rest assured that I maintain high-security standards in all the work I do.
₹3,500 INR in 7 days
5.9
5.9

Hi! I'll maintain your Node.js/Express backend on the VPS (PM2 process monitoring, NGINX, log rotation, disk housekeeping) and debug both the backend and your React Native/Expo app, including signal refresh issues, data-generator conflicts, and broker deep-link fixes via SSH access. Any specific bugs you'd like me to tackle first?
₹1,500 INR in 30 days
5.4
5.4

As a seasoned Full Stack Developer with over 8 years of experience, my skill set is perfectly aligned with your project's requirements. I have a strong command over Node.js along with working knowledge of Linux servers, such as PM2, NGINX and SSH - essential components for maintaining your live algorithmic trading signal platform. I'm highly proficient in Firebase, including Auth and Firestore, which will ensure seamless handling and maintenance of your platform. Moreover, being an adept React Native developer gives me an edge in understanding the codebase of your existing mobile app and further improving it. My familiarity with Expo adds even more value to this role. I understand that your system deals with sensitive financial data; therefore, discretion is of utmost importance. I assure you that I always prioritize data security and have no problems signing NDAs to minimize potential risks. Furthermore, periodic remote login sessions (either screenshare or SSH) are second nature to me, facilitating efficiency in communication and troubleshooting on the go.
₹27,500 INR in 7 days
5.4
5.4

✋ Hi, there. I can maintain your live Node.js backend and React Native app while fixing issues without disrupting your production system. ✔️ I have strong experience with Node.js, Express, React Native, Linux VPS, PM2, NGINX, Firebase, and REST APIs. I have worked on live applications where stability and quick debugging were important. I have fixed API issues, background services, authentication problems, server errors, and app sync issues while keeping downtime to a minimum. ✔️ I will review the current system, check PM2 processes, server logs, and API behavior to find the root cause instead of applying temporary fixes. I can debug both the backend and the React Native app, improve server maintenance, resolve data refresh issues, and keep the project organized for future updates. I am comfortable working through SSH, screen sharing, and signing an NDA. Please click the Chat button so we can discuss your current issues and get started. Looking forward to working with you! Best regards, Mykhaylo
₹1,050 INR in 7 days
5.0
5.0

Hello, I’m interested in your ongoing maintenance and bug-fixing project for your algorithmic trading platform. I have experience with Node.js, Linux servers, PM2, NGINX, Firebase, and React Native, and can confidently troubleshoot both server and application issues—not just restart services. I can help with: * Website and server maintenance * PM2, NGINX, and VPS monitoring * Node.js and React Native bug fixes * Firebase integration and debugging * Performance optimization and reliable support I’m committed to high-quality work, clear communication, timely delivery, and maintaining complete confidentiality. I’m happy to sign an NDA and discuss your requirements in detail. Warm Regards, Monica Bhatia
₹800 INR in 2 days
4.6
4.6

With over five years of experience, I've dedicated my career to turning complex ideas into robust applications. Your need for ongoing maintenance and specific bug fixes on your Node.js backend and React Native app is exactly the kind of challenge I'm well-versed in overcoming. Previous work with Linux, PM2, NGINX, and SSH has left me comfortable in your project's environment. I have foundational proficiency Lambda services Your system's running a File-based data storage architecture? Not an issue! My skills extend beyond traditional backends as I am well-versed Firebase. Moreover, my familiarity with React Native/Expo & Next. Your project will be treated with the utmost respect and attention to detail. Discretion is integral to any successful financial application. Be rest assured that I am more than willing to go the extra mile to ensure this sensitive data remains entirely secure and confidential. By selecting me, you're choosing not only a reliable and experienced developer but also a partner who values long-term relationships. Let's discuss further how my hands-on approach and passion for quality work can get the best out of your product!
₹1,050 INR in 7 days
3.8
3.8

I'll maintain your Node.js backend, fix bugs in the React Native app, and ensure smooth Firebase authentication. I'll monitor PM2 processes, check logs for errors, and perform basic server housekeeping. With strong Node.js and Linux experience, I'm a good fit. Ready to start immediately — DM me.
₹5,000 INR in 7 days
4.4
4.4

Hello, With over 15 years of focused experience as a Linux Systems Engineer. I'm confident that I can maintain your Nodejs and react application. I have good experience in PM2, Nginx, NodeJS and react vps hosting. I can provide ongoing support. I am an RHCE certified engineer. I have experience with all control panels and SSH commands. I am a full-time freelancer, available 16x7. Please find my work history to ensure my experience. thanks Bineesh
₹1,000 INR in 1 day
3.0
3.0

Hello, I can provide ongoing maintenance and bug fixing for your live Node.js trading platform, including PM2/NGINX monitoring, VPS administration, log analysis, React Native debugging, Firebase integration, and API troubleshooting. I'll proactively resolve backend and mobile issues, optimize performance, maintain server stability, and deliver clean, well-documented fixes while working securely under NDA.
₹1,050 INR in 7 days
1.4
1.4

We will replace JSON disk storage with SQLite to eliminate concurrency issues, optimize React Native signal refreshing, and fix deep-linking. We will also deduplicate scripts and configure PM2 log rotation. - SQLite database migration and script deduplication - React Native signal delivery and deep-link fixes 1. Which third-party broker's deep-linking behavior is currently broken, and on which mobile platform (iOS, Android, or both) does this occur? 2. How are the conflicting data-generator scripts currently executed (e.g., cron jobs, native PM2 processes, or internal timers within Express)? Thanks & Regards, Parvati And Sons
₹1,200 INR in 14 days
0.6
0.6

Hi, I can help maintain and support your live trading signal platform. I have experience with Node.js, Linux VPS management, PM2, NGINX, and debugging production applications. I understand that this is more than restarting services. I can investigate issues like signal data refresh problems, broker API integrations, and React Native app bugs while monitoring logs and server health. I’m also comfortable working with Firebase and can provide ongoing maintenance, troubleshooting, and performance checks as needed. I respect the need for discretion and am happy to work under an NDA. Ready to start Immediately.
₹2,500 INR in 7 days
0.4
0.4

Hello there, Keeping a live trading backend running smoothly is less about writing new code and more about catching the subtle failure patterns before they hit users — like a data-generator script silently overwriting a JSON file mid-read, causing stale signals in the app. I'll set up log-based alerts on PM2 and NGINX, implement file-locking or atomic writes to prevent the duplicate script collisions, and fix the broken deep-link routing in Expo by tracing the intent handler chain. I can deliver a stable, monitored setup within 3 days. Do you want the deep-link fix to handle the broker's callback URL natively in Expo or fall back to a custom linking config?
₹690 INR in 3 days
0.0
0.0

Hi, I’m a Full Stack Developer with 3+ years of experience building and maintaining Node.js applications, React/React Native apps, and Linux-based deployments. I have experience working with PM2, REST APIs, MongoDB, PostgreSQL, debugging backend issues, and maintaining production applications. I’m comfortable troubleshooting server problems, analyzing logs, fixing bugs, and improving application stability. I can help maintain your Node.js backend, investigate issues instead of just restarting services, and assist with React Native debugging when needed. I’m also comfortable working over SSH and signing an NDA if required. I’m available to start immediately and would be happy to discuss your requirements further. Looking forward to working with you. Thanks, Soumyajeet Chatterjee
₹2,500 INR in 7 days
0.0
0.0

Hi, I have experience developing full-stack web applications using Node.js, React, Django, MySQL, and REST APIs. During my internship at Escorts Kubota, I built dashboards and worked on backend integration. I understand your requirement for maintaining a Node.js backend and supporting a React Native application. While I am continuously improving my React Native skills, I am confident in debugging backend APIs, fixing issues, and communicating regularly throughout the project. I can start immediately and would be happy to discuss the specific fixes before we begin. Thank you for your consideration.
₹1,000 INR in 6 days
0.0
0.0

✨The best solution is ✨ to provide ongoing maintenance for your live platform by proactively monitoring the Node.js/Express backend, PM2, NGINX, and Linux VPS while systematically debugging the root causes of application issues instead of applying temporary fixes. I'll review your JSON-based data flow, optimize API reliability, resolve React Native/Expo bugs, troubleshoot Firebase authentication and broker integrations, and improve logging, error handling, and server stability to ensure uninterrupted operation. I'm comfortable working under an NDA, using SSH and screen-sharing sessions when needed, and can deliver clean, well-documented fixes with a long-term maintenance approach that keeps your production trading platform secure, reliable, and performant.
₹600 INR in 7 days
0.0
0.0

As a seasoned Full Stack and DevOps Engineer, I bring over X years of hands-on experience to the table. My fluency with Node.js, Linux management (including PM2, NGINX and SSH) and strong grasp of data storage (even without database) makes me the perfect fit for your project. Given that your system is live and financially critical, I assure you that I operate with maximum discretion which is backed by my excellent track record of handling secure applications and projects. Your requirement reflects the exact challenges that Node.js developers must tackle frequently. Whether it's monitoring processes, debugging complex issues or effective handling of specific vendor integrations, my expertise is tailored to encompass all these aspects. Additionally, my proficiency with Firebase combines nicely with my experience in trade execution platforms. Through my modular and scalable development approach, I have streamlined numerous applications resulting in fast user experiences. Therefore, I am confident in not only resolving bugs swiftly but also detecting and preempting potential issues in your system. In essence, I offer the unique blend of a versatile developer, an attentive troubleshooter, and a proactive maintainer coupled with a deep understanding of the financial sector.
₹1,050 INR in 2 days
0.0
0.0

I'm a full-stack engineer with 5+ years in Node.js backends and React Native mobile apps, plus solid Linux/VPS ops experience. I've maintained production systems similar to yours (Express + PM2 + NGINX, file-based data flows, third-party API integrations) and can handle both the monitoring side (log rotation, process health checks, disk management) and the debugging side (tracing async issues, Firebase auth flows, deep-link problems). I'm comfortable jumping into SSH sessions to diagnose issues in real time and can work within NDA requirements. Given the 23 existing bids, I'm offering competitive rates and same-day response times for critical issues. Happy to start with a small bug fix or maintenance audit to prove reliability before moving to ongoing support.
₹606 INR in 2 days
0.0
0.0

Hello, I’d be happy to support your live algorithmic trading platform with ongoing maintenance, debugging, and technical improvements. I have experience working with Node.js backend systems, Linux VPS environments, PM2, NGINX, Firebase, and React Native applications. I can help maintain your production system and resolve issues without disrupting existing services. I can assist with: * Monitoring and maintaining Node.js/Express services * PM2 process monitoring and crash recovery * Linux VPS maintenance through SSH * NGINX and SSL configuration checks * Debugging backend API issues * Fixing React Native/Expo application issues * Firebase authentication and integration support * Reviewing JSON-based data handling and resolving conflicts * Log analysis and performance improvements * Regular maintenance and troubleshooting I understand that this is a live financial application, so I will follow a careful approach with proper backups, testing, and confidentiality before making production changes. I am interested in a long-term association and can provide reliable support whenever maintenance or debugging is required. I would like to review the current issues and system setup to understand the immediate fixes required. Looking forward to working with you. Best Regards, Prachi Agrawal
₹1,050 INR in 7 days
0.0
0.0

RANGA REDDY, India
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