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I have a production-level mobile application built with Flutter. The backend services are written in PHP and connect to both MySQL and Microsoft SQL Server databases. The codebase is stable in day-to-day use, yet a handful of bugs still slip through and several new features are on my roadmap. Here’s what I need next: • Analyse the current Flutter code, identify reproducible crashes, UI glitches, or slow screens, and patch them without regressing existing functionality. • Extend the PHP API where required and make sure data flows cleanly between MySQL, MS SQL Server, and the app. • Implement a small set of new features that we will finalise together (for example, additional push notification logic or an upgraded authentication flow). • Document every change and submit clean, well-commented pull requests so I can review progress easily. • Supply a brief release note and build instructions at hand-off so I can push the update to both app stores without surprises. Acceptance criteria: zero critical errors in the latest build, successful end-to-end tests covering the new functionality, and all code merged into the main branch. If you are comfortable jumping between Flutter, PHP, MySQL, and MS SQL Server and can communicate clearly while you work, let’s talk through the feature list and get started right away.
Project ID: 40457366
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92 freelancers are bidding on average $354 USD for this job

⭐️⭐️⭐️ Flutter App Bug Fixing & Feature Enhancement (Full-Stack Support) ⭐️⭐️⭐️ Hello, I checked JD and you want — to analyze and fix bugs in your existing Flutter app, enhance PHP backend APIs, and implement new features while maintaining stability and smooth data flow between databases — * Flutter app debugging & performance optimization * UI/UX issue fixing without regression * PHP API enhancement & integration * MySQL & MS SQL Server data synchronization * New feature implementation (as discussed) * Clean code with version control (PR-based updates) Let’s chat… Thanks
$480 USD in 12 days
9.9
9.9

Hello, Our team works across Flutter + PHP backend systems with multi-database architectures (MySQL + MS SQL Server), and we regularly handle production apps where stability, regression safety, and incremental feature delivery are critical. How we would approach your project: • Full audit of Flutter codebase to identify crashes, slow screens, and UI inconsistencies • Debugging and patching with strict regression control (no breaking existing flows) • API-level review and extension of PHP services to ensure clean, consistent data flow across MySQL and MS SQL Server • Implementation of new features (we can align on scope in a short technical call) • End-to-end testing for all affected modules • Clean, well-documented pull requests for every change • Release notes + build/deployment instructions for App Store / Play Store updates We focus on safe iterative updates—fixing issues without destabilising a live production system. We can start immediately and would begin with a quick codebase review + issue mapping so we can prioritise fixes and features efficiently. Looking forward to discussing the first set of issues and getting into the code. Best Regards! Vision
$325 USD in 7 days
9.6
9.6

Hello, As a leader in the Pakistan software industry, our firm has gained extensive experience developing and enhancing mobile apps using Flutter and PHP - all while ensuring smooth data flow between MySQL, Microsoft SQL Server, and the app. Your project of analyzing the current codebase, fixing bugs, extending API, implementing new features, documenting changes and releasing updates is right up our alley. Our team prides itself on clean, well-commented code that not only makes your app more stablished but also reduces future bug regressions. We believe that collaboration is key, and as such, would maintain regular communication with you throughout the project keeping you updated on progress. Additionally, we'd provide build instructions and a release note so you can update your app stores without surprises. Lastly, over time we have realized an irrefutable fact: "Miracles happen to those who believe in them". So believe in us to make a miracle for your app; we will make sure there are zero critical errors in the latest build paired with successful end-to-end tests. I eagerly anticipate discussing the features list in detail and starting work right away to enhance your Flutter app! Thanks!
$350 USD in 3 days
8.6
8.6

SURE------I will do it in effective manner -------------- I am highly appreciative to work on this specific task I can do my best. I am an Innovative Flutter/MOBILE APP /developer having rich experience with so many successful Tasks. I have some queries to give you accurate time and price Let’s connect on chat for further discussion and start quickly. Thanks!!
$350 USD in 7 days
8.1
8.1

Hi, I’ve developed several Flutter apps with PHP backends, including one that used both MySQL and MS SQL Server. I understand the importance of a stable codebase and have extensive experience with CI/CD pipelines to ensure that new features don’t introduce regressions. I can help you with all the tasks you mentioned, including fixing bugs, implementing new features, and extending the backend. I’m also comfortable working with Azure and AWS for server management. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit. I usually respond within 10 minutes. Best regards, Adil
$350 USD in 7 days
7.6
7.6

Thank you for posting the project. You can rely on me to complete it as I am comfortable switching between Flutter, PHP & databases. Moreover I can easily be reached via text chat on this site. Feel free to share more details regarding the bugs you need fixed plus the new features you aim to implement as part of this project. Thank you for taking the time to consider my brief pitch.
$325 USD in 7 days
7.6
7.6

⭐⭐⭐⭐⭐ Improve Your Flutter App with PHP Backend Support and New Features ❇️ Hi My Friend, I hope you are doing well. I've reviewed your project details and see you are looking for a developer to enhance your Flutter application. You don’t need to look any further; Zohaib is here to help you! My team has successfully completed over 50 similar projects for mobile applications. I will analyze your Flutter code, fix issues, and implement new features while ensuring everything runs smoothly. ➡️ Why Me? I have 5 years of experience in mobile app development, focusing on Flutter, PHP, and database management. My skills include debugging, API development, and feature implementation. I also have a strong grip on MySQL and Microsoft SQL Server, ensuring seamless data flow and efficient solutions. ➡️ Let's have a quick chat to discuss your project in detail. I can share samples of my previous work, which will showcase my capabilities. Looking forward to discussing this with you in chat. ➡️ Skills & Experience: ✅ Flutter Development ✅ PHP Programming ✅ MySQL Database ✅ Microsoft SQL Server ✅ API Development ✅ Bug Fixing ✅ UI/UX Optimization ✅ Feature Implementation ✅ Code Documentation ✅ Version Control ✅ Mobile App Testing ✅ Performance Enhancement Waiting for your response! Best Regards, Zohaib
$330 USD in 2 days
7.8
7.8

Hi there, I can help you with the Flutter app fixes and enhancements. Jumping between Flutter, PHP, MySQL, and MS SQL Server is exactly my wheelhouse. I'll start by reproducing those crashes and UI glitches, patch them cleanly, then extend the PHP API to support the new features you have in mind. I always submit well-commented PRs with release notes so you can push to stores without any surprises. I'm Edward, been doing full-stack mobile work for over 10 years. Let me know if you want to discuss the feature list and get started.
$350 USD in 7 days
7.6
7.6

As the founder of SoftwareLinkers, my team and I have a deep understanding and extensive experience in exactly the areas you require for your Flutter app enhancements and fixes. Combining my solid PHP and MySQL backend development background, seamless RESTful API integration prowess, with top-notch Flutter app creation skills, we'll address the bugs in your app and enhance its functionality effeciently while ensuring zero critical errors in the latest build. You can count on us to maintain data integrity efficiently flowing between all databases involved. Moreover, our commitment goes beyond simple bug fixing. We're serious about creating sustainable solutions for your business, ensuring scalability and adaptability for future needs. Our 4.9-star review from 100+ verified clients demonstrates our ability to deliver reliable services competently and maintain high client satisfaction rate by delivering on-time with clear communication. Lastly, documentation is a critical component of our work process. We understand that precise documentation allows for easy verification of progress and smooth hand-off. At SoftwareLinkers, we will provide you with comprehensive release notes and build instructions making sure your update to the app stores is executed without surprises. Let's work together to elevate your valuable application items so you benefit from a stable market offering.
$300 USD in 12 days
6.6
6.6

Hello, I can help enhance and stabilize your production Flutter app, including fixing reproducible crashes, UI glitches, and slow screens while keeping the current functionality safe. I’m comfortable working across Flutter, PHP APIs, MySQL, and MS SQL Server, and I can also support improvements like push notification logic or authentication updates once we finalize the feature list. I will keep the work clean with well-commented pull requests, clear change documentation, release notes, and build instructions so the update is easy to review and prepare for both app stores. I am ready to begin immediately and would be happy to discuss the project in further detail. Thanks, Teo
$360 USD in 3 days
6.5
6.5

Hi There, I have strong experience working with Flutter mobile apps alongside PHP APIs, MySQL, and MS SQL Server integrations. I can efficiently debug production-level applications, fix crashes/UI issues, optimize API performance, and implement new features while maintaining stability across both Android and iOS builds. I’m comfortable reviewing existing architecture, improving authentication and push notification flows, and delivering clean, documented code with structured pull requests and release notes. I focus on maintaining reliable end-to-end functionality without introducing regressions. I’m available to start immediately and can communicate consistently throughout development to ensure smooth progress and fast turnaround on fixes and feature updates. Best Regards Waqas A.
$325 USD in 7 days
6.1
6.1

Hi, I can support you end-to-end on stabilizing your Flutter app and backend by identifying crash points in the Flutter UI layer, fixing performance bottlenecks, safely extending your PHP APIs across MySQL + MS SQL Server, and implementing new features with clean backward-compatible changes and proper release documentation. My approach would start with a full-stack diagnostic pass (Flutter DevTools + API logging + DB query profiling across MySQL/MSSQL), followed by incremental fixes via feature-flagged pull requests, ensuring no regression in production while new features (like improved auth or push notification flow) are introduced with end-to-end tested API contracts and staged deployments for safe release to both app stores. Lets discuss on chat. Regards Abhishek
$325 USD in 7 days
5.8
5.8

Greetings, Aminuzzaman here. I am a Senior Full-Stack Developer (10+ years) specializing in Flutter, PHP, and multi-database relational architectures. Managing stable production platforms that communicate simultaneously across diverse engines is one of my core strengths—most notably on heavy data logging systems like Movex UAE and role-based apps like Fix - Finn Jobb. I am completely comfortable jumping between your Flutter client, the PHP API surface, and the dual MySQL / Microsoft SQL Server backend layers. I am ready to step in, run diagnostics, clear out outstanding edge-case defects, and cleanly scale your roadmap features. I provide modular, clean source contributions on a daily basis to your private Git repository.
$325 USD in 7 days
5.4
5.4

As the founder and CEO of Web Crest and someone with over a decade's worth of experience in the industry, I am confident that our proficient team is the right fit for your project. Our skill set covers everything you need for this task: from backend development using PHP to mobile app development using Flutter. We are also adept at API creation and management to ensure seamless data flow between different servers, like MySQL and Microsoft SQL Server, which are crucial for your application. Developing and maintaining production-level applications is our forte, and we understand how even minor bugs can impact performance and user experience. As such, we have adopted a stringent quality control process that identifies, fix and regresses any issues without compromising other functionalities. We will also provide comprehensive documentation for each change made so you can review progress effortlessly. Furthermore, we pride ourselves on being able to deliver polished products which perfectly aligns with your goals. Your acceptance criteria are our top priority; zero critical errors, successful end-to-end tests for every new feature implemented, merged code into the main branch, detailed release notes, and build instructions everything will be meticulously handled. Partner with us today and let's begin building a reliable system that grows seamlessly along with your business.
$300 USD in 3 days
4.8
4.8

Hi, I’ve thoroughly reviewed your project requirements concerning the Flutter app enhancement and backend integration involving PHP, MySQL, and MS SQL Server. With solid experience in full-stack mobile development, I have successfully resolved similar challenges including crash fixes, UI improvements, and backend API extensions. I’ll carefully analyze the Flutter codebase to identify and fix reproducible bugs, extend the PHP API ensuring seamless data flow across both databases, and implement new features collaboratively to align perfectly with your roadmap. Each change will be documented with clean, well-commented pull requests, supported by release notes and build instructions to ensure a smooth app store deployment. I am confident in meeting your acceptance criteria, delivering a robust, error-free build with thorough end-to-end testing. I’m ready to start immediately and propose completing the scope within 14 days. Let’s discuss your feature list to finalize details and next steps Could you share the top three new features you’re prioritizing for this update? Best regards,
$360 USD in 18 days
5.1
5.1

With a deep understanding of back-end technologies like MySQL and PHP, I am confident in my ability to not only identify and patch the current bugs in your app but also extend the backend services seamlessly. Additionally, my expertise in frontend technologies like Flutter, React Native, and Expo, will allow me to more effectively enhance your mobile app while ensuring it remains stable and fast, without regressing any existent functionality. My approach to problem-solving mirrors your expectations for this project: clear communication, efficient solutions, and thorough documentation. To guarantee proper tracking and transparency of all enhancements, I will submit clean pull requests with well-commented code that clearly outlines every change I have made. We can work together on the final delivery notes and I'll provide concise build instructions at your disposal. Let me leverage my skills as we work through your feature list ensuring we hit all the requirements and bringing zero critical errors to the table for your produciton-level app.
$325 USD in 5 days
4.7
4.7

⚠️ If you're not happy, you don’t pay. ⚠️ Hi there, thank you for sharing your detailed project brief. I can enhance your production-level mobile application built with Flutter and PHP, seamlessly integrating MySQL and Microsoft SQL Server databases, ensuring stability and efficient performance. I will deliver: • Analyzing and fixing Flutter code issues • Extending and optimizing PHP API for smooth data flow • Implementing new features like push notifications and enhanced authentication • Documenting changes and providing clear instructions • Offering release notes for easy updates You will also receive comprehensive documentation and seamless support. I am confident I can execute your vision professionally and efficiently. Looking forward to discussing timeline and next steps. Best regards, Chirag.
$300 USD in 7 days
4.3
4.3

As a seasoned Full-Stack Developer with over seven years of professional experience, I am well-equipped to take on your complex Flutter project. My expertise in Android, Flutter, Mobile App Development, and PHP align with your requirements and will ensure I effectively enhance and debug your existing mobile app. Your assurance of zero critical errors is within reach with me. I have a solid command over multiple databases like MySQL, MS SQL Server, and a deep knowledge of backend services. This will enable me to seamlessly handle the data flow and extend the necessary PHP API while ensuring it interacts perfectly with your Flutter app. What sets me apart is not only my proficiency in various technologies but also my commitment to clear communication. Rest assured, you will receive daily progress updates throughout the project. Further, to simplify future development and maintenance, all changes made during this process will be well-documented and prime for review. I pride myself on delivering quality work on or before deadlines - a key reason why 98% of my projects are successfully shipped on time. Partnering with me means you get a reliable developer who not only possesses the technical skills to execute precisely what you need but also offers valuable insight that optimizes your project. Let's connect and start building something incredible together!
$358 USD in 5 days
4.4
4.4

Warm greetings, your Flutter + PHP + dual-database (MySQL + MS SQL Server) stack is exactly the kind of cross-layer system we handle through structured debugging and API-level optimization. We are a team of 62 professionals with over 9 years of experience in Flutter development, backend API engineering, and multi-database integration. Here’s how we can help: • Debug Flutter crashes, UI glitches, and performance bottlenecks • Extend and stabilize PHP APIs for clean MySQL/MS SQL data flow • Implement new features (auth flow, push notifications, etc.) safely • Provide clean, reviewed pull requests with proper documentation • End-to-end testing + release notes for Play Store & App Store What state is your current codebase in (monolith or modular structure)? Also, are you using REST APIs or any existing framework like Laravel for the backend?
$325 USD in 7 days
3.7
3.7

As a seasoned developer with two decades of industry experience, I am the perfect candidate to elevate your Flutter app to new heights. My proficiency in Python, JavaScript, Dart – the language specifically used for Flutter - has equipped me to analyze, identify, and rapidly patch any existing glitches or crashes in your code base without disrupting the app's current functionality. Additionally, my extensive knowledge of PHP and experience in developing APIs will ensure smooth data transmission from your MySQL and MS SQL Server databases to the app. Moreover, as an AI and ML expert, I strive to innovate and drive business growth by constructing intelligent solutions that are not only efficient but also scalable - a perfect fit for extending the existing PHP API among other new feature requirements. I am confident in my ability to deliver impeccable work because I’ve learned over the years how crucial thorough documentation is in streamlining processes. I'll provide detailed release notes & well-commented pull requests for absolute transparency with each step. Over this vast stretch of time, I've honed my positional strengths of collaborating seamlessly across various timelines and communicating the intricacies of complex projects succinctly - attributes essential in remote teamwork scenarios. So let's build up your app together; let's mix our progressive abilities into one extraordinary transformation! Reach out to me so we can further discuss your project!
$325 USD in 7 days
3.1
3.1

Simpang Ampat, Malaysia
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