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# Freelancer Project: Upgrade Existing Attendance App + ERP Apps I already have a working **Attendance Web + Android App** and an existing **ERP Web + 6 Android Apps** with complete source code. This is **not development from scratch**. Existing functions must remain safe and working. ## 1. Attendance App Add: * Native push notifications * Live/background employee location tracking * QR Code Check-In/Check-Out * Office location/geofence attendance * Configurable Check-In/Check-Out time rules * Late/Grace/Half-Day/Early Exit rules * Minimum working-hours rules * GPS latitude/longitude capture * Location/attendance history reports * Basic fake/mock-location protection * Individual/group employee chat * Voice messages * Individual/group voice calling * Individual/group video calling ## 2. ERP + 6 Apps Apps: **TC, TL, FO, Reseller TC, Reseller TL, Reseller FO** Required: * Native push notifications for all 6 apps * Notifications controlled from ERP Web * Send to individual, selected users, team, role or all users * FO App latitude/longitude capture for selected field/customer activities * Store date/time, GPS accuracy and location * ERP map and location reports ## 3. Automatic Push Notifications – Both Web Systems Required in **Attendance Web + ERP Web**: * Manual Send Now * Scheduled notifications * Automatic event-based notifications * Individual / selected / team / role / all users * Notification templates * Enable/Disable rules * Notification history/status Examples: attendance, late check-in, absence, leave, reminders, leads, callbacks, approvals, performance and other events. I will provide more automatic notification conditions later, so this module must be flexible for adding new triggers. ## 4. Automatic WhatsApp Reports – Both Web Systems Add official WhatsApp API integration to **Attendance Web + ERP Web**. Required: * Auto-generate selected reports * Send as Image / PDF / Text * Send to one or multiple WhatsApp numbers * Daily / Weekly / Monthly scheduling * Exact sending time * Manual Send Now * Enable/Disable schedules * Sent/Failed history * Retry failed messages Examples: * Attendance reports * Present/Absent * Late/Leave * Daily Login * TC/TL/FO Performance * Sales/Activation * Callback/Follow-up * Monthly reports Exact reports, recipients and timings will be provided later. Use the **official WhatsApp Business/Cloud API only**, under my ownership. ## 5. Existing Bugs + Small Feature Changes Developer must also: * Review and fix existing bugs in both systems * Fix UI/functional issues found during testing * Fix broken links/pages/API errors * Fix performance or compatibility issues where required * Add some **small features/changes** that I will provide during development * Small agreed changes should be included without rebuilding the complete system Please inform me first if any requested change is considered a major new module or requires additional cost. ## 6. Important * Keep all existing features working * Do not modify live production without approval * Take backup and test safely * Security check for backdoors, unknown APIs, hard-coded credentials and suspicious dependencies * Report suspicious items before changing/removing them * All Firebase, WhatsApp, voice/video, API and signing accounts/keys must be under my ownership * No developer-owned dependency ## 7. Final Delivery I need: * Complete updated source code * Backend/API/database changes * Attendance APK + Play Store-ready AAB * All 6 ERP app APK/AAB + editable source * Firebase/push setup * WhatsApp API setup * Chat/voice/video setup * Android signing keys * Build/deployment instructions * All credentials/account ownership * Existing bug fixes * Agreed small feature additions * Final testing and bug support before acceptance Please confirm **recommended technologies, third-party/monthly costs, total development cost, delivery time and post-delivery support**.
Project ID: 40659144
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As an accomplished developer with a Master’s degree in AI and Machine Learning, I would be the perfect fit for your project. With my extensive experience in web and mobile app development and API integration, I have the skills needed to enhance your existing Attendance and ERP Apps. My previous work includes projects similar to yours, involving scalable platform building, integrations, automation, and security fortification. Delivering on your specific requirements such as the addition of native push notifications, geofencing attendance, GPS tracking, location history reports, among others will be a top priority for me. By utilizing technologies such as Laravel, React Native and REST APIs, I will ensure that the existing functionality remains intact while incorporating the new features seamlessly. Additionally, with my proficiency in database management, I can handle your reporting needs efficiently with robust solutions ensuring smooth data-handling. For your peace of mind, I make it a point to prioritize clear communication throughout every step of the process. Moreover, my ability to adapt to project needs efficiently allows me to not only complete bug fixes but also cater to small feature changes without disrupting your existing systems. My dedication to clean code serves as an assurance that there will be no hidden surprises lurking in your apps when I'm done +
₹14,000 INR in 14 days
6.6
6.6
68 freelancers are bidding on average ₹13,538 INR for this job

Hi there, I’ve reviewed your Flutter app requirements and would love to help. With 5+ years of experience in cross-platform development, I specialise in clean UI, smooth performance, and robust API integration. I’ll begin with clear planning, share regular progress updates, and ensure the app is fully tested before launch. Let’s connect to discuss your vision — I’m ready to get started! Best, Bhargav Flutter Developer | Android & iOS Expert
₹7,000 INR in 7 days
7.1
7.1

With extensive experience in mobile and web app development, I am well positioned to take on your project of enhancing your existing Attendance and ERP apps. I am highly proficient in a wide array of languages including Java, Kotlin, React Native, Flutter, JavaScript, and TypeScript, allowing me to carefully navigate through your codebase without disrupting existing functions. Location functionalities are key for attendance apps to ensure accountability and transparency. My expertise in GPS latitude/longitude tracking, geofencing tools, and generating location-based reports render me apt for incorporating these essential features into your Attendance App. Furthermore, I comprehend the significance of push notifications for seamless communication, and therefore can proficiently design a system that's easily configurable for different user groups - individuals, selected users, teams or roles. Moreover, an important aspect of this project is incorporating the WhatsApp API for automatic reports. My expertise in leveraging WhatsApp Business/Cloud API would be tremendously useful in automating report generation, timely scheduling of sending them directly to designated recipients' accounts via images/PDFs/text to avoid loss of data. My deep knowledge also covers effective backup-taking and testing simultaneously to maintain high safety standards while solving existing bugs or making small feature changes.
₹7,000 INR in 2 days
7.0
7.0

Hi there, we have strong hands-on expertise in both Attendance Management and ERP systems, including mobile apps, web panels, GPS/location tracking, notifications, role-based workflows and business automation. Your existing system is therefore very much within our area of expertise. Since you already have working Attendance + ERP systems and complete source code, we’ll upgrade the existing architecture safely without rebuilding or disturbing current functionality. We can handle FCM push notifications, background GPS tracking, geofencing, QR attendance, attendance rules, location reports, mock-location protection, chat, voice/video calling, ERP-controlled notifications, FO GPS tracking/maps, automated triggers, official WhatsApp Cloud API reports, scheduling, retries, history, bug fixes and agreed small changes. We’ll follow backup → staging → development → testing → approval → production, with no unapproved live changes. All Firebase, WhatsApp, API, signing and third-party accounts remain under your ownership. Third-party costs: Clearly identified separately before implementation. Project Cost: We’ll discuss after reviewing the existing code and finalizing the scope. Timeline & support: Confirmed after codebase review. Our priority is to add the required capabilities while keeping your existing Attendance and ERP systems stable, secure and fully functional. Regards, Rohan
₹67,000 INR in 32 days
6.6
6.6

Hello, We would be glad to support you with this project. Protovo Solutions LLP provides reliable virtual assistance, data entry, research, and remote business support services to clients worldwide. Our team can handle both short-term assignments and ongoing support with accuracy, confidentiality, and clear communication. Our services include: • Data entry, data cleaning, and data formatting • Web research and information collection • Excel, Google Sheets, and document management • CRM data entry and database updates • Lead generation and contact-list building • Email and calendar management • Product listing and e-commerce support • Social media and content assistance • Customer and administrative support • Bookkeeping and accounting assistance • PDF conversion, copy-paste, and file organization • AI-assisted research and repetitive task automation We follow clear instructions carefully, provide regular progress updates, and review the completed work before submission. Our team can also adapt to your preferred tools, processes, working hours, and reporting format. Protovo Solutions LLP has been serving global clients since 2016 and has earned more than 100 client reviews on Freelancer. Please connect with us through chat to discuss the work. We can review your requirements and start with a small task or milestone before moving to the complete assignment. Kind regards, Protovo Solutions LLP
₹12,500 INR in 10 days
6.8
6.8

Hello 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, Website development, Desktop application development, 3rd party Artificial Intelligence api, AR/ VR, Chatbot, Blockchain- Cryptocurrency, CRM & ERP, Game Development and any other Software development. I am having expertise 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. Please consider me and initiate a chat for further detailed discussion. Regards, Anju Logical Soft Tech Pvt Ltd, Indore(M.P)
₹40,000 INR in 15 days
6.6
6.6

Hi, I can upgrade your existing Attendance + ERP ecosystem without rebuilding it from scratch. I have experience with Android, React/TypeScript, Firebase FCM, GPS/geofencing, QR attendance, real-time chat, voice/video calling, WhatsApp Cloud API, and scalable notification systems. I’ll first audit the existing code, database, APIs and dependencies, create a safe backup/staging environment, then implement each module without affecting current functionality. All Firebase, WhatsApp, API and signing credentials will remain under your ownership. I’ll provide complete source code, APK/AAB builds, integrations, deployment documentation, testing, bug fixes and post-delivery support. I’m ready to start immediately. Regards ALOP
₹7,000 INR in 3 days
6.4
6.4

Hello, I will enhance your Attendance and ERP apps by adding push notifications, geofenced check-in, QR attendance, chat, voice/video calls, WhatsApp Cloud API reports, and the FO GPS capture, while keeping existing features safe. I can start today. I will build the notification and WhatsApp modules as a flexible trigger engine so you can add new events and reports later without rebuilding. Questions: 1) Can you share the current stack for the ERP and Attendance apps? 2) Do you already have a WhatsApp Business API account approved? Looking forward to discussing further. Regards, Shayan.
₹5,350 INR in 3 days
5.6
5.6

Hi, With both systems already working, the real challenge is adding features like background location, QR attendance, flexible notifications, and WhatsApp reports without breaking existing workflows. The first step should be a proper audit of the current code, APIs, Firebase setup, dependencies, and production flow. From there, changes can be delivered in controlled milestones with backups, testing, and approval before anything reaches production. The notification system should also be built in a way that allows new triggers and rules to be added later without major changes. All Firebase, WhatsApp, calling, and signing accounts can remain under your ownership. Could you share the existing source code and technology stack for a quick technical review? Lets discuss on chat.
₹7,000 INR in 7 days
5.9
5.9

Hello, We can enhance your existing Attendance and ERP ecosystem without rebuilding it, while carefully preserving all current functionality. Our team can handle push notifications, background GPS/geofencing, QR attendance, attendance rules, chat, voice/video calling, ERP location tracking, flexible event-based notifications, and official WhatsApp Cloud API reporting. We’ll first review the existing source code, architecture, APIs, security, and dependencies, then work safely through a staging environment with proper backups and testing. All Firebase, WhatsApp, API, signing keys, and third-party accounts will remain under your ownership. We’ll deliver the updated source code, APK/AAB builds, backend changes, integrations, deployment documentation, bug fixes, agreed small changes, and post-delivery support. Share the existing source code and architecture, and we can provide a fixed cost, timeline, and technology plan after the initial technical review.
₹10,000 INR in 7 days
4.9
4.9

Hi, Thanks for posting "Enhance Existing Attendance and ERP Apps" — it lands right in our wheelhouse, and we'd be thrilled to bring it to life. My goal isn’t simply to finish the task, but to give you real, lasting value for every bit you invest in it. From your brief I can see this involves video, reel — all areas we handle in-house. We specialise in PHP, Mobile App Development, Android, Software Architecture, which lines up directly with what you need. How we'd approach it: - Sort through the raw footage and map out the sequence against your outline - Trim dead air, drop the slip-ups and lock tight, natural pacing - Add clean, smooth transitions and balance the audio so it flows - Render the final video to spec and hand over the project file, ready to go I also noted you don’t need rebuilding the complete system Please in — that’s clear, and I’ll keep the work clean and strictly on-brief. Expect smooth progress updates throughout, full respect for your specifications, and zero surprises along the way. I can start right away and keep you updated at every step — let’s make this a great one. Best regards, FreeLancers360 Let’s connect in chat and get started — message me anytime and I’ll reply right away!
₹1,500 INR in 5 days
4.7
4.7

Your priority is not rebuilding the system—it’s extending the existing Attendance + ERP ecosystem without breaking production behavior across seven Android apps and two web systems. I’ve worked with mobile apps, backend APIs, Firebase-style push workflows, real-time messaging, geolocation, WebSockets, payments/integrations, and production deployments, so I’d approach this with a strict audit → staging → regression-test process before touching live systems. For notifications, I’d build one reusable event-driven module supporting manual, scheduled, role/team/user targeting, templates, history and future triggers. Location features would use Android foreground/background services with geofencing, accuracy capture and basic mock-location checks. Chat can use WebSockets, while voice/video should use a maintained RTC provider rather than custom media infrastructure. WhatsApp reports would use the official Meta Cloud API under your ownership, with scheduling, retries and delivery logs. I’d also audit the existing code for hard-coded credentials, suspicious dependencies and API issues before extending it. Before committing to the final implementation plan, I’d need to review the current Android/web stacks, backend architecture and source quality.
₹7,000 INR in 2 days
4.5
4.5

Hi, You need upgrades on existing Attendance (Web + Android) and ERP (Web + 6 Android apps) — keep current features safe: FCM push, GPS/geofence/QR attendance rules, chat + voice/video, ERP location capture + maps, flexible auto-notifications, official WhatsApp Cloud API reports, bug fixes, and small changes. All keys under your accounts. Tech: keep your current stack; add FCM, WhatsApp Cloud API (your Meta account), maps for geofence/reports, and Agora or WebRTC for voice/video (monthly usage fees on your billing). Third-party (your cost): Firebase (usually free tier), WhatsApp conversation fees, Agora/WebRTC minutes if used. Price: ₹12,500 for Phase 1 (FCM on Attendance + 6 apps, ERP web send rules, FO lat/long capture + map report, critical bug fixes). Chat/calls, full attendance rules, and WhatsApp schedules as Phase 2 after we agree scope. Timeline: Phase 1 ~3–4 weeks after source + staging access. Support: 2 weeks bugfix after hand-off. I won’t touch production without approval; backup first; flag any suspicious APIs/credentials. Best regards
₹12,500 INR in 7 days
4.7
4.7

Hi, I’ve reviewed your requirements, and they align well with the work I deliver for startups, businesses, and digital agencies. I’m a Full-Stack Web, Mobile & AI Developer specialising in Laravel, PHP, React.js, Node.js, Flutter, and AI/LLM integrations. I work on both new products and existing applications, including complex projects requiring debugging, modernisation, performance improvements, security fixes, and new feature development. I can take ownership from technical assessment through development, testing, optimisation, and deployment, with a focus on clean architecture, scalability, security, and maintainability. My experience includes: • Laravel / PHP applications & APIs • React.js & modern web applications • Node.js backends & REST APIs • Flutter mobile applications • AI, LLM & third-party API integrations • SaaS, CRM & ERP platforms • Database design & optimisation • Security fixes & application hardening • Performance optimisation & bug fixing • Existing application maintenance & project takeovers I also work as an extended engineering team or white-label development partner for digital agencies. If you share your requirements, existing application, repository, or specifications, I can quickly understand the technical scope and suggest a practical approach. I’d be happy to discuss your project and determine the best way forward.
₹7,000 INR in 7 days
4.6
4.6

As the architect behind autonomous agents like LangChain, LangGraph, CrewAI, and OpenAI Agents SDK, I have a profound understanding of adding functionality to existing systems comprehensively. My goal for this project would be to enhance your **Attendance App and ERP system** without jeopardizing any of the existing functionalities. With my experience in big data handling from real estate, e-commerce, healthcare to SaaS, I understand the complexity involved in preserving and upgrading systems with intricate database interrelationships. Moreover, with multifaceted exposure across web and mobile app development (React Native & Flutter), I can help you with both the **iOS and Android platforms**. My fluency in AI and automation systems will be ideal for incorporating critical features like Office location/geofence attendance using QR Code Check-In/Check-Out methodology. Alongside enhancing location reporting for field activities on FO app on top of ensuring push notification service on all apps triggered from ERP web.
₹1,500 INR in 2 days
4.9
4.9

Hi, I see you need to extend a live attendance system and several ERP Android apps while keeping the current functionality intact. Adding native push notifications, real‑time location tracking, QR‑code check‑in, geofencing, attendance rules, chat and voice/video features is a substantial upgrade, and I understand the importance of preserving the existing workflow. In the past I built a vehicle‑tracking solution for MitraServices that handled live GPS streams, geofence alerts and secure API integration, and I added Firebase Cloud Messaging and WebRTC‑based voice/video to a logistics app used by 10,000+ drivers. I also integrated QR‑code scanning and attendance rules in a corporate time‑keeping portal for a large retailer, delivering accurate location logs and customizable shift policies. My approach would be to layer Firebase for push and real‑time location, extend the Laravel backend with new REST endpoints for attendance rules, and embed a React‑Native module for QR scanning, chat and WebRTC calls, ensuring all existing APIs remain unchanged. Could you share the current backend stack version and whether you prefer Firebase or a self‑hosted push service? Also, do you have any specific UI/UX guidelines for the new chat and video screens? Looking forward to discussing the details and getting started. Best Regards, Anil Prajapati
₹1,500 INR in 7 days
4.0
4.0

Hi, I’ve gone through the requirements carefully. Since this is an existing Attendance + ERP ecosystem, I’d approach it as a controlled upgrade, not a rewrite—first audit the current code, APIs, Firebase, database and Android builds, then add each module without disturbing existing workflows. I can handle push notifications, GPS/geofencing, QR attendance, WhatsApp Cloud API, scheduled/event-based notifications, reporting, chat, voice/video, FO tracking, bug fixes and the 6 ERP apps, with proper testing before production changes. A couple of questions: What tech stack are the existing web/app systems using? Also, are Firebase and WhatsApp Cloud API already configured under your ownership? Share the source code/current setup and I can review the architecture, then discuss the exact timeline and fixed cost with you. Best Regards, Arshiya
₹12,000 INR in 7 days
4.0
4.0

Hi, The key point I noticed is that you already have working Attendance and ERP systems, so my first priority would be protecting existing functionality while adding the requested improvements rather than unnecessarily rewriting the apps. I’m Yousef, an Android/backend developer experienced with mobile apps, APIs, databases, Firebase, and push notifications. My approach would be: • Review the existing source and architecture first • Reproduce/test the current working flows • Add new features in isolated modules where possible • Integrate native push notifications cleanly • Preserve existing API/database behaviour • Test affected workflows after every change • Provide documented source changes With seven Android apps involved, I would first identify shared code/APIs so improvements can be implemented consistently instead of creating seven different fixes. Before giving a final timeline, I’d like to inspect the existing Android technology stack and the complete feature list. Are the Android apps native Java/Kotlin, or built using a cross-platform framework? Best, Yousef
₹7,000 INR in 10 days
4.2
4.2

Over the past 6 years, I've honed my skills in Android App Development and API Integration, which makes me uniquely suited to tackle your ambitious project. My experience includes numerous successful ventures, creating mobile apps from scratch as well as enhancing existing systems. I'm familiar with pushing the limits of apps to include complex functionalities like the ones you require, such as native push notifications and location tracking. Another feature that sets me apart is my keen understanding of integrated reporting across diverse platforms like yours - be it Attendance reports, Sales/Activation reports, or even callbacks. I have successfully incorporated Google's Firebase service into projects like yours before for robust and secure storage and efficient data sharing. Furthermore, my experience goes beyond development. I believe communication is key for a successful project as complex as this one. That's why I provide my clients consistent updates throughout the process, ensuring full transparency while adhering to delivery timelines. My work ethic and unwavering commitment to delivering polished work on time have become hallmarks of my services. Choosing me would mean not just getting a competent developer but also a reliable partner in propelling your project forward.
₹1,500 INR in 7 days
3.5
3.5

Hello, I can upgrade your existing Attendance and ERP systems while preserving all current functionality, with a focus on safe integration and minimal impact to production. I have strong experience with Ionic/Angular, Capacitor, Android, PHP/Laravel, REST APIs, Firebase push notifications, GPS/location services, QR workflows, and third-party API integrations. I can implement background location/geofencing, attendance rules, QR check-in/out, chat, voice/video calling, ERP-controlled notifications, flexible event-based triggers, and official WhatsApp Cloud API reporting. I will first audit the existing source code, dependencies, APIs, database, and security, create backups, and work in a staging environment before production deployment. I can provide complete source code, APK/AAB builds, deployment documentation, account ownership setup, testing, and post-delivery bug support; exact cost and timeline can be finalized after reviewing the existing codebase. Thanks and regards! Mahesh Verma Founder, Visioncraftexports
₹10,000 INR in 7 days
2.8
2.8

⚠️ IF YOU'RE NOT HAPPY YOU DON'T PAY ⚠️ I think we're a strong fit for your project. I specialize in PHP, Mobile App Development, Android, Software Architecture. For this brief (# Freelancer Project: Upgrade Existing Attendance App + ERP Apps I already have a working **Attenda) I would isolate the bottleneck, confirm acceptance criteria, and ship a clean, measurable fix you can verify in staging before it hits production. I'd keep the architecture simple, secure, responsive, and easy for you to manage after handover. Multiple 4.0-rated reviews on Freelancer (16 total), payment verified. I can start against a 7-day delivery window. I'd love to chat about your project! The worst that can happen is you walk away with a free consultation. Regards, N0VATECH
₹9,544 INR in 7 days
4.2
4.2

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