Improve IoT App Performance & Backend Transition

@deependra4113

Hi, I’m interested in optimizing your existing IoT mobile application and migrating the current Firebase-based architecture to a self-hosted VPS + MQTT solution. My approach would begin with profiling the mobile app and existing Node.js backend to identify unnecessary processing, inefficient API calls, excessive logging, and background tasks affecting performance. I can help with: • Mobile and backend performance optimization • Firebase migration planning and implementation • Replacing Firebase data flows with suitable self-hosted services • Updating the mobile application for the new architecture • End-to-end testing and production build preparation • Architecture diagram, Markdown setup documentation, and change log I will carefully map the existing Firebase Authentication, Realtime Database, Cloud Functions, and push notification functionality to suitable alternatives to avoid feature regressions. Regarding the required latency targets, actual performance on a 2G connection depends on network conditions. However, I can optimize payload sizes, persistent MQTT connections, caching, backend processing, and unnecessary network requests to achieve the best possible performance. I have experience with mobile development, Firebase, REST APIs, real-time applications, and backend integrations. I’m ready to review your existing codebase and architecture.

@Sv3nie

Hi, Day three I'd hand you the Ubuntu VPS with Mosquitto on TLS, before touching the app. Firebase auth and push are the fiddly swap; Node backends are my daily work. Which cloud functions matter most to keep? Lets get in contact first.

@HunainHaider110

As a seasoned Full Stack Web & App Developer and an AI Automation expert, I possess the skills and perspective to help you meet your IoT app performance goals. With fluency in JavaScript, comfort traversing backends in Node.js, understanding of MQTT's real-time messaging system, and experience handling similar tasks through my career, I can deliver the improvements that you seek in an optimal manner. Through the lens of thorough profiling and strategic code-trimming, I am adept at identifying and eliminating sluggishness within the app by removing unnecessary features while preserving seamless functionality. I understand your need for a low-latency user experience regardless of connection quality. My existing experience with Linux-based secure VPS setup and configuring sophisticated MQTT brokers such as Mosquitto or EMQX will be invaluable for not only replacing Firebase but also providing instructions/documentation throughout. Best Regards, Hunain A

@devhasan14

Hi, The key here isn’t simply replacing Firebase with MQTT—it’s removing the latency at its source while preserving every existing IoT feature. I’d first profile the mobile app and Node/JavaScript backend to identify slow API calls, unnecessary background work, excessive logging, inefficient database access, and blocking operations. I’ll then refactor only where the profiling shows a measurable benefit, keeping the existing functionality intact. For the infrastructure migration, I can set up an Ubuntu VPS with Mosquitto or EMQX, configure MQTT topics and authentication, enable TLS, firewall the required ports, and add basic monitoring. Firebase authentication, realtime data, cloud functions, and push-related functionality would then be mapped to appropriate self-hosted/lightweight services rather than recreated unnecessarily. On the performance side, I’d specifically measure cold-start/load time, device synchronization, and command round-trips under constrained network conditions. The goal would be to work toward your ≤1s initial load and ≤500ms command target, while being realistic about what can be guaranteed over an actual 2G network. Finally, I’ll run end-to-end regression testing, produce a clean mobile build, and document the new architecture, VPS setup, configuration, and optimization changes in Markdown.

@naeem1114

The biggest hidden bottleneck is the way the current Firebase listeners keep the app alive even when the device is on a 2G network. I'll profile the Node code and mobile client, cut idle timers or verbose logging, and swap them for lightweight MQTT subscriptions using QoS 1. By moving the auth check to a JWT that the app validates locally, we avoid extra round trips during cold start. A common pitfall when swapping Firebase for a self-hosted broker is forgetting TLS and keep-alive settings, which forces the client to reconnect on every packet. I'll harden Ubuntu VPS, install Mosquitto with TLS, lock firewall, and set keep-alive to 30 seconds so the app stays connected on flaky 2G. Ready to start immediately and get the first data load under one second.

@FizzaMushtaq07

I am a Full Stack Developer with 2 plus years working with Node.js, JavaScript, mobile applications, Linux, VPS infrastructure, and real time IoT systems. Persistent latency will continue affecting every device interaction unless bottlenecks are measured before migrating infrastructure. I can profile the client and backend, optimize expensive operations, then replace Firebase services with a focused Node.js backend and MQTT messaging. The technical tradeoff is keeping MQTT for device events while using lightweight HTTP where appropriate, because forcing every workflow through MQTT can complicate authentication and request response operations. Which mobile framework is the existing app built with, Flutter, React Native, or native. This determines the profiling and migration approach. Happy to discuss details in chat. Regards, Fizza Mushtaq

@Imranbrohi786

I can optimize your existing IoT mobile app and Node.js backend, identify performance bottlenecks, and migrate the infrastructure from Firebase to a secure VPS with MQTT-based real-time communication. I’ll profile and refactor inefficient code, reduce unnecessary background tasks and logging, optimize data synchronization and command handling, and configure Ubuntu with Mosquitto/EMQX, SSL/TLS, firewall rules, and monitoring. I’ll also replace the required Firebase services, update the mobile app, perform end-to-end testing, and provide the architecture diagram, setup documentation, and detailed changelog. My focus will be achieving the requested startup and command-response targets while maintaining existing functionality and reliability.

@anas389

Hi, I can help optimize the existing IoT app and migrate the Firebase-based backend to a secure VPS + MQTT architecture without rebuilding what already works. I’ll first profile the mobile app and Node/JavaScript backend to identify slow functions, unnecessary background work, excessive logging, inefficient queries and avoidable network round trips. I’ll then refactor the bottlenecks while preserving existing functionality. For the new setup, I can configure an Ubuntu VPS with Mosquitto or EMQX, TLS/SSL, firewall rules, authentication and basic monitoring. I’ll map the existing Firebase Authentication, Realtime Database, Cloud Functions and push functionality to appropriate self-hosted/lightweight alternatives, using MQTT for real-time device communication where it makes sense. I’ll also update the mobile client so device data, sync and control commands use the new backend, then perform end-to-end testing and regression testing. Deliverables: • Optimized mobile + Node backend • VPS/MQTT setup and hardening • Firebase migration • End-to-end tested mobile build • Architecture diagram • Markdown server setup guide • Optimization/change log I’ll benchmark the key flows against your ≤1s load and ≤500ms command targets and document the results. Ready to review the existing code and Firebase configuration.

@mohamedr128

Hello, how are you doing ? I understood that you need to remove IoT app latency, optimize the existing mobile/Node.js backend, and migrate Firebase to a secure VPS + MQTT architecture, by reading carefully and detail. I’ll profile bottlenecks, optimize data flows, configure Ubuntu with Mosquitto/EMQX, TLS, firewall and monitoring, replace Firebase services, and test end-to-end against your latency targets. I have senior experience with JavaScript, Node.js, Linux, VPS, MQTT, APIs, mobile apps and performance optimization. I’ll deliver clean code, architecture documentation and a clear changelog.

@Cruz1217

The hidden cost of frequent Firebase calls often shows up as the latency you see on a 2G network. I’ll profile the mobile client and Node backend, trim heavy logging, and replace Firebase with an MQTT broker on a hardened Ubuntu VPS. The migration will keep the same API shape so the app continues to work without code changes. A common mistake is moving authentication to MQTT without a token layer, which can open security holes. You’ll get cold‑start under one second, command round‑trip under 500 ms on 2G, and a concise Markdown setup guide. I’ll keep you posted each step so you always know what’s changing.

@sourabhk003

As a seasoned **Python Developer and Software Solutions Professional**, I bring extensive skills in **Data Management, Software Architecture, Python, Link Building, MySQL, API Development, API Integration** and **Documentation** to streamline your app's performance. My experience aligns directly with your project requirements of profiling, trimming and migration, as I've previously refactored codebases and successfully transitioned applications to new systems for improved efficiency and better user experience. Moreover, my deep understanding of Node.js will come in handy for optimizing and fine-tuning functions within your existing backend that may be causing significant delays. Beyond the technical proficiency, I'm also very much attuned to meeting deadlines in a timely manner without comprising the quality of the end product. This is a quality that will be manifested in providing clear, concise documentation alongside a well-constructed architecture diagram and reproducible server setup instructions in Markdown format.

@Shaenix

Hi, I can optimise your existing IoT app and migrate the Firebase-based architecture to a lean Node.js + MQTT + VPS setup without breaking the current functionality. I’ll first profile the mobile app and backend to identify actual latency/resource bottlenecks, then refactor unnecessary background tasks, logging and data flows. I’ll handle: Mobile + Node.js performance profiling and optimisation Faster device sync, screen loads and control commands Ubuntu VPS setup with Mosquitto/EMQX MQTT topic design and real-time device communication SSL/TLS, firewall and basic server hardening Firebase Auth, Realtime DB, Functions and messaging migration Mobile app integration with the new backend End-to-end testing and production build Architecture diagram, setup guide and changelog I have 3+ years of experience with Node.js, JavaScript/TypeScript, APIs, databases, mobile apps and cloud deployments, including production backend systems. I’ll benchmark the system under controlled network conditions and optimise aggressively toward your latency targets. ₹5,000 | 5 days | Available immediately I’d like to have a quick meeting to review your current Firebase architecture and codebase, then I can confirm the migration approach and timeline. Best, Shahid

@junayd20

Hello, I’ve reviewed your IoT app optimization and Firebase-to-VPS migration requirements. I can optimize your existing mobile app and Node.js backend, reduce latency, and migrate the system to a secure MQTT-based architecture. I will: • Profile the app/backend and identify slow functions, unnecessary background tasks, logging, and inefficient requests. • Refactor bottlenecks without breaking existing features. • Set up an Ubuntu VPS with Mosquitto/EMQX, SSL/TLS, firewall, authentication, and monitoring. • Replace Firebase Auth, Realtime Database, Cloud Functions, and messaging with suitable self-hosted alternatives. • Implement efficient MQTT communication for real-time device data and control commands. • Optimize network traffic and payloads for low-bandwidth/2G connections. • Update and test the mobile app with the new backend. • Provide setup documentation, architecture details, and changelog. My priority will be fast response times, reliability, security, and maintaining all existing functionality. I can start with a complete code audit and move step-by-step through optimization, migration, testing, and deployment. I’m ready to start immediately. Thank you.

@Rajatt1099

Hi there, I can optimize the existing IoT app and migrate the backend from Firebase to a lean, secure VPS architecture without compromising current functionality. I’ll start with profiling rather than guessing, identify the actual latency/resource bottlenecks, then refactor the critical paths. Recommended stack: * Existing mobile stack + optimized data flow * Node.js backend * Ubuntu VPS + Nginx * Mosquitto/EMQX with MQTT over TLS * PostgreSQL/Redis where appropriate * JWT-based authentication + self-hosted/lightweight push solution * Firewall, SSL/TLS, monitoring and automated deployment I’ll handle: * Mobile/backend profiling and performance optimization * Firebase Auth, database, functions and messaging migration * MQTT-based real-time device communication * Sub-1s loading and ≤500ms command target optimization * Security hardening and VPS deployment * End-to-end testing and clean production build * Architecture diagram, setup guide and detailed changelog Milestones: 1. Audit + performance baseline 2. Backend/VPS/MQTT migration 3. Mobile integration + Firebase removal 4. Load testing, optimization, deployment & documentation I’ll preserve existing functionality while making the architecture faster, leaner, and easier to maintain. Best, Rajat Trivedi

@Digitalizers010

Hi, an IoT stack moved off Firebase onto your own VPS with MQTT, plus the latency work. The risk is doing that without downtime. How we'd do it: Ubuntu with EMQX behind TLS and per device ACLs, then cut over piece by piece. Auth onto a small Node service with JWT, realtime state onto retained topics at QoS 1, cloud functions into plain workers, the app pointing at both backends behind a flag until the old one is idle. Push likely stays on FCM either way. Then we profile the client and strip the chatty logging. Is the 500 ms target measured on the radio link or from the server? We've shipped backends of this shape. Regards, Digitalizers

@BesterDevenier

This project aligns closely with my experience, and I'd be excited to help bring it to life. I see you need to improve your IoT app's performance by profiling both the mobile client and the backend. I have extensive experience in optimizing Node/JavaScript applications, which will help pinpoint and refactor resource-consuming functions effectively. I would approach this by first analyzing the current architecture and developing a plan to transition to a VPS, ensuring MQTT integration for real-time messaging. While I am new to Freelancer, I have tons of experience and have done other projects off site. I would love to chat more about your project! Regards, Bester Devenier

@luisjdev

Hi, I'm a backend developer with hands-on experience on Node.js services running on Linux/Ubuntu VPS environments, including performance tuning and backend architecture transitions. I can dig into your current IoT app's bottlenecks (query performance, connection handling, MQTT message throughput) and plan/execute the backend transition with minimal downtime. Could you share more on the current stack (database, hosting setup, MQTT broker) and what "backend transition" specifically involves (new framework, new hosting, refactor)? Proposed: $4200 USD, 15-day delivery, open to a phased approach with milestones if preferred.

@mykolas67

I have strong experience with Node.js, mobile applications, VPS deployment, Linux/Ubuntu, and real-time MQTT architectures. Your project is a good fit because the main challenge is not rebuilding the IoT platform, but profiling the existing stack, removing bottlenecks, and migrating Firebase functionality without disrupting device control. I’ll handle: Profile the mobile app and Node.js backend to identify latency, unnecessary background work, logging, and inefficient data flows Optimize screen loading, device synchronization, and command handling Design and deploy the Ubuntu VPS with Mosquitto/EMQX, TLS, firewall rules, monitoring, and secure authentication Replace Firebase services with suitable self-hosted alternatives while using MQTT appropriately for real-time communication Migrate existing Firebase functions/rules and preserve current functionality Perform end-to-end testing and deliver the optimized production build Provide architecture documentation, VPS setup instructions, and a clear optimization/migration changelog I’ll benchmark the existing system first so improvements are measurable rather than based on assumptions. I’ll also specifically test the acceptance targets for cold-start/data loading and command round-trip performance before final delivery. Q: What mobile framework is the existing app built with—React Native, Flutter, native Android/iOS, or another framework?

@renoa99

Hi, I can optimize your existing IoT mobile app and Node.js backend, then migrate the Firebase stack to a secure VPS with MQTT-based real-time communication. I have experience with JavaScript, Node.js, Linux/Ubuntu, VPS deployment, MQTT, API optimization, and backend/mobile performance tuning. What I’ll deliver: * Profile and optimize mobile/backend performance * Reduce unnecessary tasks, logging, and resource usage * Target sub-second data sync and command response * Set up secure Ubuntu VPS with Mosquitto/EMQX * Configure SSL/TLS, firewall, and basic monitoring * Replace Firebase auth, database, functions, and messaging * Integrate MQTT and test end-to-end flows * Provide architecture, setup documentation, and changelog I can start immediately and work through the migration carefully without breaking existing functionality. Please share the current app/backend source and Firebase setup. Best regards, Reno