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Brief Requirement: Build a Flutter demo for OPPO phones only, stable GPS location under lock screen, background run & normal power saving mode (system cannot kill tracking service). Deliverables: 1. Full reusable Flutter source code 2. Installable test APK 3. Continuous positioning test log Acceptance Rule: If positioning fails to keep running under OPPO power saving & locked screen, full milestone refund. Cost Agreement: within 3 business days delivery. This demo fee will be fully deducted from Phase 1 full 5 Android devices adaptation budget later, no extra hidden fees for location module.
Project ID: 40594041
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165 freelancers are bidding on average $478 USD for this job

Hello, I see you're looking to build a Flutter demo specifically for OPPO phones to ensure stable GPS location tracking under various conditions including lock screen and power saving mode. With my expertise in mobile app development and experience integrating third-party SDKs like AMAP, I can create a solution that ensures the tracking service remains active without being killed by the system. My approach will include developing a robust Flutter app with a focus on maintaining GPS tracking stability for OPPO devices. I will ensure the service can run persistently in the background by leveraging native Android capabilities while keeping power consumption in check. Additionally, I will deliver full and reusable source code, enabling you to integrate or modify it as needed. Looking forward to the opportunity to solve this challenge and deliver a high-performing app that meets your expectations. Best Regards, Khorshed Alam, RS Software
$750 USD in 12 days
9.5
9.5

HELLO, I have reviewed your requirement for an OPPO-specific Flutter background GPS tracking demo and understand the acceptance condition regarding continuous positioning under lock screen and normal power-saving mode. I have 10+ years of experience in Flutter and Android background services, including integration of AMAP and Tencent/NetEase IM SDKs. I can build a reusable Flutter module using Android foreground service architecture, OEM-specific battery optimization handling, and continuous location logging for OPPO devices. The deliverables will include the complete reusable Flutter source code, an installable test APK, and continuous positioning test logs captured during locked-screen and power-saving scenarios. I WILL PROVIDE 2 YEARS OF FREE ONGOING SUPPORT, COMPLETE SOURCE CODE, WORK WITH AGILE METHODOLOGY, AND ASSIST YOU THROUGH THE ENTIRE PROCESS FROM DEVELOPMENT TO TESTING AND HANDOFF. I can start immediately and target delivery within your 3-business-day window, with daily progress updates during implementation and testing. I eagerly await your positive response. Thanks, Christina
$505 USD in 7 days
8.4
8.4

Greetings! I have 8+ years of experience, with a proven track record of delivering high-quality solutions to 100+ clients, specializing in Flutter development and GPS tracking integration. To tackle this project, I will utilize my expertise in Flutter, AMAP, and Tecent/NetEase IM third-party SDKs to build a stable GPS tracking demo for OPPO phones. I invite you to message me to discuss the project and share my portfolio, I'm confident we can achieve a successful outcome. Looking forward to collaborating with you! Best regards, M H B
$1,000 USD in 14 days
8.4
8.4

Hi, I'm a senior developer with 20+ years of experience, Top Rated on Freelancer.com with 1,500+ projects and a 5-star record, and I've integrated AMAP and Tencent/NetEase IM SDKs before, including OPPO-specific background location handling. I'll set up a Flutter project targeting OPPO devices, implement AMAP for GPS tracking with aggressive battery optimization hacks to prevent system kills, and add a foreground service with persistent notification to ensure lock-screen stability. I'll test on OPPO's ColorOS power-saving modes, including Ultra Battery Saver, and log positioning every 30 seconds to verify continuous operation. The APK will be signed and ready for sideloading, and I'll include the raw test logs with timestamps. The demo will be delivered in 3 days, with full refund if positioning stops under OPPO's power-saving. I can start immediately.
$208 USD in 15 days
7.8
7.8

Hey, i will build a clean and professional multi page Flutter application for your GPS tracking solution that is focused on improving their online presence, building trust, and helping them get more clients and bookings I will work directly on the required Flutter platform to develop a reusable demo with stable background GPS tracking for OPPO devices, optimized for lock screen operation and normal power saving mode, along with test APK, source code, and positioning logs. I will also handle on page SEO including optimized meta titles descriptions image alt tags URL structure and basic SEO setup to improve search visibility and performance. i am interested to doing this work and i am agree with your budget Do you already have a preferred design style or any reference websites you want me to follow for your project? portfolio: https://www.freelancer.com/u/Hammadhassan21 Best Regards: Hammad Hassan
$500 USD in 10 days
7.9
7.9

Hello, I can help with your "Flutter OPPO Background GPS Tracking Demo (Price can be negotiated. Have experience on AMAP and Tecent/NetEase IM third-party sdks integration)" project. I build clean, maintainable PHP backends — core PHP and Laravel/Symfony, MySQL schema design, and well-structured REST APIs. For work involving php, mobile app development, android, mobile app testing, ios development, backend development, flutter, I pay close attention to validation, security, and readable code, delivering in small, testable milestones. I provide clean commits and clear documentation. Could we discuss the specifics before I firm up the timeline? ⭐ 5.0/5 from a recent client: "Project was delivered before Time with Best professional Knowledge One could ever held. Thanks for the support" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
$800 USD in 16 days
8.0
8.0

Hi, Good Day, From your description, you need a reliable Flutter background location solution specifically optimized for OPPO devices, where GPS tracking continues working under lock screen and power-saving conditions. Assuming the main requirement is stability rather than a full production app, I'll create a reusable Flutter demo with background location handling, OPPO-specific optimization, installable APK, source code, and detailed positioning logs for testing. I'll focus on proper Android background service configuration, battery optimization handling, and lifecycle management to reduce the chances of the system stopping the tracking service. Before delivery, I'll test the APK under locked screen and normal power-saving scenarios to verify the behavior. I've worked with Flutter mobile development and third-party SDK integrations, and I understand the challenges involved with manufacturer-specific Android restrictions. One quick question: which OPPO models and Android versions will be used for the acceptance testing? Thanks, M Adeel,
$200 USD in 7 days
8.0
8.0

As an experienced Full-Stack software engineer specializing in Android and Flutter development, I am confident in my ability to deliver the results you need for your OPPO Background GPS Tracking project. My solid understanding of Flutter, GPS APIs, and Android power optimization techniques uniquely suit me to tackle this project's specific requirements. Having integrated AMAP and Tecent/NetEase IM third-party SDKs before, I am no stranger to working on solutions that must perform flawlessly on specific devices or operating systems. I understand the critical nature of continuous positioning under lock screen and background run mode without draining excessive power as required for this demo. Rest assured, if your system cannot kill the tracking service, I won't either. In addition to completing the deliverables swiftly - full reusable source code, installable test APK, and continuous positioning test log - I also offer a trustworthy partnership. Not only will this demo fee be fully deducted from your project's upcoming budget with zero hidden fees, but I'm also committed to open communication throughout the project’s lifecycle and after-sales support. Let's discuss further in detail about how we can make your business thrive with a successful demo! Thank you from @Özgür.
$305 USD in 7 days
8.0
8.0

Hello, Hope you are doing well. Reading your requirement to build a Flutter demo that reliably tracks background GPS on OPPO devices, with experience in AMAP and Tencent/NetEase IM SDKs. We'll build a Flutter app with a background service (using flutter_background_service or WorkManager) configured to survive OPPO's aggressive battery management — handling the MIUI/ColorOS background process restrictions via foreground notification and power exemption prompts. The GPS tracking will integrate AMAP's Flutter plugin for accurate location, and we'll demo IM messaging using the Tencent or NetEase IM SDK you specify. Delivered with full source code and documented setup steps. We have more than 15 years of experience in mobile app development, Flutter, and Chinese SDK integrations (AMAP, Tencent IM, NetEase IM). We are confident that we would be a perfect fit for this project as our experience and abilities precisely match your requirements. A few quick questions: - Which OPPO/ColorOS version is the primary target? - Which IM SDK do you need — Tencent IM or NetEase NIMSDK? - Do you need background GPS to work when the app is force-stopped, or only minimised? We can get you the exact work done as you required and can start the project immediately after you assign it to us. Looking forward to hearing back from you!! Thanks.
$450 USD in 7 days
8.4
8.4

Respectfully I understand you need a Flutter demo specifically optimized for OPPO devices, ensuring stable GPS tracking while the phone is locked and the system is running under normal power-saving conditions. The goal is to create a reliable background location service with reusable source code, an installable APK, and detailed positioning logs for validation. I have experience with Flutter, Android development, background services, GPS/location APIs, Java/Kotlin integration, responsive UI, and cross-platform mobile solutions. I write clean, well-commented code and focus on stability, performance, and real-device testing. I will maintain clear communication throughout the project, share progress updates, test thoroughly on OPPO devices, and deliver the required APK, source code, and logs within the agreed 3-business-day timeline. Looking forward to discussing the details. Best regards, Zain Ali
$500 USD in 7 days
6.7
6.7

Understanding the need for a reliable GPS tracking demo specifically for OPPO devices, our team is well-equipped to deliver a stable solution that operates seamlessly under the lock screen and power-saving mode. We’ll focus on ensuring continuous location tracking, addressing the critical requirement of maintaining service despite OPPO’s aggressive power management. Our approach will include rigorous testing to ensure compliance with your acceptance rule. With expertise in Flutter and experience integrating third-party SDKs like AMAP and Tencent, we can ensure a high-quality product. We have 20+ 5-star reviews on similar projects! Communication, quality, and on-time delivery are top priorities for us. If you'd like, I can also share similar work we've completed and discuss the best approach for your project. Regards, JP
$550 USD in 7 days
6.8
6.8

With my broad range of skills, largely focused on Web and Mobile development, AI, and Automation, I am confident I can help you successfully complete your Flutter OPPO Background GPS Tracking Demo. I particularly have a good understanding of the complex topics which your project delves into such as AMAP and Tencent/NetEase IM third-party SDKs integration. In addition to this, my skills in Swift, Kotlin, and Dart make me uniquely equipped to tackle the challenges faced in this project using Flutter for both Android and iOS. To create this demo, I'll bring out my 4 years’ experience as a Full-stack Developer with clients and tasks that spanned across a wide spectrum of domains. In this time I have learned how to produce quality code while keeping in mind issues such as power saving mode and background running that affect the performance of GPS tracking services. Moreover, my experience with APIs be it REST or GraphQL will be beneficial in this task where continuous positioning test log is required. With me, communication is key; you can expect regular updates throughout the project journey ensuring that we meet all your requirements for the final deliverables. Let's work together on this exciting project guaranteeing you accuracy, efficiency, and most importantly value for your investment.
$50 USD in 7 days
7.1
7.1

Hello, My mobile work covers Flutter background services, GPS tracking, and phone vendor power limits like OPPO lock screen behavior. I also handle PHP integrations and iOS Development planning when a demo later grows beyond Android. I will prepare reusable source code, a test APK, and a continuous positioning log within the 3 business day target. The service will be tested under locked screen and normal power saving mode, so the tiny OPPO monster does not quietly stop tracking. Best regards, Teo
$200 USD in 2 days
6.5
6.5

Hi, I'm interested in your project "Flutter OPPO Background GPS Tracking Demo (Price can be negotiated. Have experience on AMAP and Tecent/NetEase IM third-party sdks integration) ". I have relevant experience and can deliver quality results within your timeline and budget. I'd love to discuss the details. Please feel free to reach out.
$250 USD in 5 days
6.7
6.7

Hi, I can build a Flutter demo for OPPO that keeps GPS running reliably under lock screen and power saving, avoiding the usual background service kills. I recently integrated AMAP and Tencent/NetEase IM SDKs in a Flutter project, though the first version needed extra work to handle Android’s aggressive power optimizations. I’d approach this using Flutter with platform-specific channels for OPPO’s battery optimizations, because it keeps the UI consistent while avoiding native code bloat. The biggest improvement will come from properly handling Android’s foreground service requirements and OPPO’s custom power settings. I’ll test on multiple OPPO devices before delivery to ensure stability, and provide logs to verify performance under real conditions. The goal is a demo that proves the concept works reliably, making Phase 1’s adaptation smoother and reducing future debugging time. If this fits, I can start right now. Thanks, Denis
$505 USD in 15 days
6.2
6.2

Hi, I’ve built Flutter location demos that run in the background on Android devices with locked screens and power saving, and I verify continuous reachability with real-device logs. Execution approach: I’d start by validating the current flow on OPPO devices, isolate unstable parts under lock and low power, then iterate against practical usage patterns with a small, reusable module. One technical risk: OPPO’s background limits can kill a service if foreground/notification handling isn’t correct. Two clarification questions: 1) What should happen if the background task is killed and later re-spawned, should we resume from the last known location or restart tracking fresh? 2) What logs and device state should accompany the test APK (timestamps, battery saver state, network, logs retention)? If we're aligned, I can outline the implementation phases before kickoff. Best regards, Brandon
$15 USD in 1 day
6.0
6.0

Hi. To build this OPPO-only Flutter GPS demo, I’ll use a foreground service, native Android background location handling, and vendor-specific power management handling so tracking keeps running under lock screen and normal battery saver modes. I’ll structure the demo with a clean Flutter layer plus Android Kotlin bridge code, then validate it with continuous logging to prove stability on OPPO devices. I’ll also package a test APK and keep the code reusable for the later 5-device adaptation phase. As a Senior Flutter Developer, I have mastered Flutter, Android native plugins, background services, GPS/location SDK integration, and have strong experience in mobile tracking demos and third-party SDK integration projects. I am sure I can deliver high-quality results within 3 business days. Let’s get in touch and discuss more. Thanks.
$320 USD in 3 days
5.6
5.6

hello, I worked on a similar mobile tracking project where I implemented background location services, GPS monitoring, permission handling, foreground services, and battery optimization handling for Android devices. The solution included continuous location updates, background execution management, and testing across different Android system behaviors to improve tracking reliability. For this demo, I will build a reusable Flutter architecture with a native Android location service layer where required, configure foreground service notifications, handle OPPO-specific background restrictions, request proper permissions, and create continuous positioning logs for verification. I will also provide a clean Flutter source code structure that can be extended for additional Android devices in Phase 1. Deliverables will include the complete Flutter source code, installable APK, and detailed GPS test logs showing background tracking behavior under locked screen and power-saving conditions. I can complete the demo within 3 business days and ensure the implementation is focused on your acceptance criteria and future device adaptation requirements. Tran Viet
$500 USD in 7 days
5.8
5.8

HELLO, We have reviewed your requirements and can develop a Flutter demo for OPPO devices with a strong focus on stable background GPS tracking under lock screen and normal power-saving mode. With 9+ years of experience in Flutter, Android native development, background services, and third-party SDK integrations including AMap and IM SDKs, we can evaluate the best approach while following OPPO's latest system restrictions and best practices. The deliverables will include reusable Flutter source code, an installable APK, and continuous positioning logs for testing. We'll perform thorough validation on OPPO devices and keep you updated throughout development. If successful, the solution can be extended seamlessly into the full multi-device adaptation phase. We are available to start immediately and can deliver the demo within your required timeline. Thanks, InvokeTech
$505 USD in 7 days
5.6
5.6

Dear Client, I read "Flutter OPPO Background GPS Tracking Demo (Price can be negotiated. Have experience on AMAP and Tecent/NetEase IM third-party sdks integration) " carefully and understand you want a single Flutter codebase that runs smoothly on both Android and iOS. My hands-on experience with PHP, Mobile App Development, Android, Mobile App Testing, iOS Development, Backend Development, Flutter aligns directly with what you need. I've shipped Flutter apps from scratch to store launch — clean architecture, smooth animations, native-feeling UI and solid API integrations — that stay easy to maintain as features grow. A few quick questions to get us started: 1. Do you need Android, iOS, or both from day one? 2. Are UI designs ready, or should I design the screens as well? 3. Is there an existing backend/API, or should I build that too? Thanks & Regards, Deepak
$600 USD in 14 days
5.8
5.8

Shanghai, China
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