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I built the Android app myself—starting from a Base44 template—and the core features are live, but the backend is acting up. Two things are failing right now: 1. Push-style notifications never make it to the devices. 2. When the user tries to download an image, nothing comes through. There are no visible error messages, so I need you to dive into the server-side code, trace the silent failures, and get both services working again. Once you’re done, notifications should arrive in real time and every requested image should download successfully on Wi-Fi and mobile data alike. Deliverables • Clean, commented fixes committed to the existing repo • Brief changelog outlining what you touched and why • A quick sanity test video or screenshots proving notifications fire and images download on a physical device I’ll provide full source access, current API keys, and test accounts as soon as we agree on timing.
Project ID: 40600777
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92 freelancers are bidding on average $48 SGD for this job

Hello There! I’m Md. Toriqul Islam, and I’m excited to partner with you. I can dive into your project immediately. I have rich experience in Android backend debugging, API integration, push notifications, mobile applications, and server-side troubleshooting. I am skilled in Android, Java, Kotlin, Firebase Cloud Messaging (FCM), REST APIs, Node.js, PHP, and backend debugging. I understand your Android app has two backend issues: push notifications are not reaching devices, and image downloads are failing without visible errors. I’ll trace the server-side workflow, identify the root causes, implement clean fixes, verify functionality on physical devices, and provide a documented changelog with proof of successful notification delivery and image downloads. My expertise in mobile backend debugging, FCM, APIs, and Android development ensures a reliable and maintainable solution. I’m ready to start immediately. Feel free to share the repository, API keys, and test accounts. Looking forward to hearing from you. Best regards, Md. Toriqul Islam
$12 SGD in 1 day
5.6
5.6

With your Android app backend in need of some TLC, look no further for professional API integration and backend development skills. As an accomplished Web & App Developer, I've gained extensive experience in dissecting complex codebases and resolving intricate bugs, making me a perfect fit for your project. I have a firm grasp of key languages such as HTML, CSS, JavaScript, PHP and frameworks such as Flutter and Laravel that underpin backend development. Thus, I can proficiently locate every silent failure within the server code to ensure successful push notifications and seamless image downloading. Equipped with thorough and meticulous work practices, I commit to providing clean code fixes clearly outlined in a changelog that will be integrated into your existing repository. I understand the significance of a quick turnaround in bug resolution; therefore, my process involves committing to quality timelines while ensuring client satisfaction isn't compromised. Rest assured, with my proficiency in both API and Backend Development, I will curate effective solutions to make sure the fixed services function seamlessly alongside the live core features. Importantly, I'll supplement each code fix with comprehensible comments for future reference.
$12 SGD in 1 day
5.6
5.6

Hello, you have a live mobile app with two backend failures that look silent from the surface, and this is usually a tracing problem more than a feature problem. The real engineering risk is missing observability across the delivery path, because notification and download failures often come from a broken handoff between service layers rather than one obvious bad endpoint. I’ve built and debugged production systems where network behavior, backend state, and client expectations drift out of sync without throwing useful errors. The closest relevant work here is Enterprise ProxyTool Client App for network-path reliability and Dent-Cloud for production API behavior under real usage. Both required isolating failures across boundaries instead of patching symptoms. I usually structure this kind of fix by separating trigger generation, outbound delivery, file access, and response handling, then validating each hop with targeted logging and reproducible device tests. With a Java-based mobile surface, I’d still treat the backend as the primary fault domain first unless the traces prove otherwise. The goal is not just to make it work once, but to leave behind clean fixes, clearer diagnostics, and a changelog that explains the failure mode. If useful, I can first map the notification and image-download request flow and identify the likely breakpoints before touching production logic. Clifton
$30 SGD in 7 days
5.6
5.6

As a full stack developer with extensive expertise in Android app development, I am confident in my ability to resolve the backend issues you are currently facing. My competency in technologies like Kotlin, REST APIs, and GitHub will enable me to effectively dive into your server-side code and identify the root causes behind your notification and image downloading failures. With years of experience under my belt, I have developed a keen eye for tracing silent errors and implementing clean fixes. Rest assured, once I am done, your notifications will be delivered in real-time and images will download seamlessly on all connections. Beyond just fixing the issues, I understand the importance of communication and accountability in this process. Thus, I will provide you with clean commented fixes committed to your existing repo while also outlining a changelog that explains every touchpoint to ensure transparency and clarity. To top it off, I'll present a quick sanity test video or screenshots that will demonstrate the successful firing of notifications and images being downloaded from a physical device.
$21 SGD in 1 day
5.5
5.5

Hi there, I can fix your both below issues:- 1. Push-style notifications never make it to the devices. 2. When the user tries to download an image, nothing comes through. Since i have backend and Android both experience if it require i will check it from android side as well lets connect to get started thank you.
$50 SGD in 1 day
5.4
5.4

Hello Building an Android app yourself is a huge milestone, but optimizing it for launch and cleaning up the codebase is usually where it gets tricky. I specialize in taking self-built apps, fixing performance bottlenecks, and getting them production-ready. Recently, I refactored a client's bootstrap Android app, reducing crashes by 40% before their launch. Let's chat about what needs fixing next. Giáp Văn Hưng
$21 SGD in 7 days
4.9
4.9

As a seasoned full-stack developer with a passion for building functional and scalable solutions, I believe I am your ideal candidate to fix the backend issues of your Android app. With over eight years in the industry and more than 200 successful projects under my belt, I've honed my skills in Android, Backend Development, Java, and Mobile App Development - all of which are essential for addressing your project requirements. Apart from my technical proficiency, I bring a strategic approach to problem-solving. Fixing bugs often requires not just locating them but understanding why they occurred and designing systematic solutions. My extensive experience in troubleshooting and debugging will enable me to meticulously dig into the server-side code, identifying and resolving the issues causing notifications failure and image download problems. I also appreciate the importance of clear communication and fast delivery when it comes to resolving issues that directly impact your app's performance. Hence, you can count on me for regular updates throughout the process along with clean, commented fixes committed to your existing repo. To further reassure you about my capabilities, I'll provide you with a brief changelog that outlines all changes made along with necessary test videos or screenshots showing notifications firing up and images downloading successfully on different networks. Choose me, Vimal Kumar Prajapat, and let's tackle these bugs head-on together!
$150 SGD in 7 days
4.9
4.9

Hi, On a recent Android app project, I debugged backend integrations, API issues, and service failures to restore reliable app functionality. From your job description, it sounds like you need help tracing silent backend failures affecting push notifications and image downloads. The main challenge is not just fixing the symptoms, but identifying the root cause and making the services stable again. My approach would be to: • Review server side code, APIs, and notification/image delivery flow. • Debug failures, fix backend issues, and test across devices. • Provide clean code updates, changelog, and proof of successful testing. This will help restore reliable notifications and image downloads while keeping the backend maintainable. A quick question: Is the backend built with a specific stack (Firebase, Node.js, PHP, etc.)? I can also share relevant debugging and mobile backend experience before we move forward. Regards, Shawana
$25 SGD in 9 days
4.7
4.7

Hi there, Your project "Android App Backend Bug Fix" instantly caught my attention — it's exactly the kind of work we love to take on. I love turning a solid brief like yours into a polished result you’ll be proud to put your name on. From your brief I can see this involves android, mobile app — all areas we handle in-house. We specialise in Java, Mobile App Development, iPhone, Android, which lines up directly with what you need. How we'd approach it: - Finalise the screens, user flows and feature list with you - Build smooth, native-feeling UI with clean, maintainable code - QA on real devices, then prepare and ship to the store(s) - Post-launch support and iteration once you’re live You can count on tight communication, on-time delivery, and a result that’s effortless to sign off on. Happy to jump on a quick chat to walk through scope and timelines whenever suits you. Best regards, FreeLancers360 Let’s connect in chat and get started — message me anytime and I’ll reply right away!
$12 SGD in 5 days
4.5
4.5

Hello, are the notifications built with Firebase/FCM, or does the Base44 backend use a custom push service? I have experience debugging Android apps, backend APIs, push notifications, image/file downloads, API keys, permissions, and silent server-side failures. I will trace the backend logs, reproduce both issues on a real device, fix the notification and image download flow, then provide clean commits, a changelog, and proof screenshots/video. I can start immediately. Can we have a chat to clarify your requirements? Thanks
$30 SGD in 1 day
4.3
4.3

Having built Android apps from the ground up, I have a deep understanding of the intricacies of mobile development. My expertise in full-stack development, particularly in Node.js and API Design & Integration, readily equips me for the task at hand. My decade of experience has honed my debugging skills and equipped me to tackle backend issues with precision. By committing clean, commented fixes to the existing repo, I can ensure -essential replication once we get these two crucial services back online. Moreover, I'm adept at managing complex databases and optimizing system performance—a valuable tool in tracing silent failures. Rest assured, my approach will always be methodical and meticulous as we unearth the bug's root cause and fix it. I will not consider our job done until push notifications are coming through in real-time and your users can download images seamlessly on both Wi-Fi and mobile data.
$21 SGD in 7 days
4.1
4.1

Hi, I am an experienced Android and backend developer with expertise in debugging mobile applications, APIs, push notification systems, and file/image delivery services. I can investigate the silent backend failures and restore both notification delivery and image downloads. My approach will be: • Review the existing server-side code, API endpoints, logs, and notification configuration. • Trace the notification workflow from backend trigger to device delivery (Firebase/APNs or existing service). • Debug image download flow, including storage permissions, API responses, authentication, URLs, and mobile network handling. • Implement clean fixes with proper error handling and logging to prevent future silent failures. Deliverables: • Clean, commented fixes committed to your existing repository. • A concise changelog explaining the root causes and changes made. • Testing proof with screenshots or video showing successful notifications and image downloads on a real device. I have experience working with Android apps, backend APIs, Firebase services, cloud storage, and production debugging. I can quickly review the current architecture and focus on resolving the issues without unnecessary changes. I’m ready to start once you provide source access and test credentials.
$21 SGD in 7 days
4.1
4.1

Hi, I’d start by tracing the two broken delivery paths without changing the Base44 app flow, since silent failures often come from credentials, server responses, storage URLs, or Android permissions. Two failure paths. I’ll reproduce notification sends and image requests on a physical Android device over Wi-Fi and cellular, inspect logs and request payloads, then commit targeted fixes with comments and a changelog. I’ll verify token registration, notification-provider responses, and the file response rather than trusting a successful API call. Send the repo access and current notification and storage configuration.
$30 SGD in 3 days
4.3
4.3

Hi, I can troubleshoot and fix both backend issues in your existing Android app. I’ll review the server-side notification flow, API endpoints, device tokens, permissions, and delivery logic to identify why push notifications are silently failing. I’ll also trace the image download process, including API responses, file URLs, permissions, storage handling, and network-related issues, to ensure downloads work reliably on both Wi-Fi and mobile data. I’ll make clean, maintainable fixes directly in the existing repository, add comments where needed, and provide a clear changelog explaining what was changed and why. I’ll also test everything on a physical Android device and provide screenshots or a short video confirming that notifications arrive and images download successfully. I’m ready to review the source code and start immediately. Let’s chat and discuss the current backend setup and issues.
$40 SGD in 2 days
4.6
4.6

Hello, "Push-style notifications" are not reaching devices and image downloads stall silently. I’ll add proper error handling around the Firebase Cloud Messaging integration and switch the image fetch to use OkHttp with a retry policy, ensuring failures surface in logs and the UI stays responsive. Do you have a preferred branch naming convention for the fixes? Thanks.
$100 SGD in 5 days
4.0
4.0

Hello, my name is Jonas, backend developer. The notification issue and failed image downloads are probably unrelated, but both point to backend requests completing silently without the expected response. That usually comes down to API configuration, permissions, token handling, or file delivery rather than the Android app itself. I'll trace each request from the server to the device, fix the root cause instead of masking it, and keep the existing structure intact. Everything will be tested on a real device, and I'll leave clear comments with a short changelog so the fixes are easy to follow. Before I start, one thing would help. Which backend is your Base44 app using, and are there any server logs available? Your app should send notifications and deliver images reliably on both Wi-Fi and mobile networks. Thanks for your time. I'd be happy to get it working again.
$127 SGD in 2 days
3.4
3.4

Hi, I can help you in fixing your android app and make both Notifications and images to work according to your requirements and needs. I'm ready to start working now. Lets chat and share some details.
$30 SGD in 2 days
3.2
3.2

Hi, ✅✅✅✅✅ Only Perfection & Even 99.99% Isn't Enough For Me. ✅✅✅✅✅ I have strong experience with Android backends, push notifications and file delivery issues. I’ll trace the silent failures, fix notification delivery and image downloads, then test both on a physical device over WiFi and mobile data. Can you share the backend stack and current notification service? Thanks, Srdan
$20 SGD in 1 day
3.1
3.1

Hi, I'd be happy to help troubleshoot and fix the backend issues in your Android application. I have 18+ years of experience in Java backend development with strong expertise in Spring Boot, REST APIs, cloud services, and debugging complex production issues. I'm comfortable investigating problems where there are no obvious error messages by analyzing logs, tracing request flows, and identifying failures across the backend, storage, and notification services. For your project, I will: * Diagnose why push notifications are not reaching devices and restore reliable real-time delivery. * Trace the image download flow to identify and fix the underlying issue. * Review server-side configuration, authentication, permissions, and API integrations to ensure everything works correctly over both Wi-Fi and mobile networks. * Deliver clean, well-documented code with a summary of all changes. * Provide proof of successful testing with screenshots or a short video demonstrating both notifications and image downloads. I believe in fixing the root cause rather than applying temporary workarounds, ensuring the solution is stable and maintainable. I'm available to start immediately and would be happy to discuss your current architecture and timeline. Looking forward to working with you. Best regards, Nouman Khalid
$25 SGD in 7 days
3.1
3.1

Hey , I just went through the project description, and I see you are looking for someone experienced in Android, Android App Development, Java, Backend Development, iPhone, API, Mobile App Development and Debugging. It instantly reminded me of a client who faced similar challenges, and I knew I had a tailor-made solution for it. Please review my profile to confirm that I have great experience working with these tech stacks. While I have few questions: • Is there anything else you’d like to add to the project details? • What’s the top hurdle you’re facing with this project? • What is the timeline to get this done? Why Choose Me? 250+ Projects. 5 Years. Zero Misses. My reputation is built on a single metric: Flawless Execution. While others promise quality, my last 100+ consecutive 5-star reviews prove it. I don’t just finish the job; I set the standard. The portfolio here is just the tip of the iceberg. To respect client confidentiality, my recent heavy-hitters aren't public, but I can share them 1-on-1. Regards, Ali .
$12 SGD in 5 days
2.6
2.6

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