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I have a live ride-hailing platform built on a custom PHP backend (Laravel-style structure, no framework upgrades yet) and a Kotlin-based Android rider/driver app. A recent round of code changes has introduced several production-blocking bugs and I need an experienced full-stack developer who can jump in immediately, locate the root causes, and deploy stable fixes without disrupting users already on the road. You will be working inside a Git-controlled codebase that also exposes a REST/JSON API to the mobile app. I can grant you direct access to the staging server plus crash logs from Firebase, New Relic traces, and the current error tracker. While I will guide you through the business logic, I’ll rely on your own debugging workflow, unit/integration testing, and clean commit history to move rapidly. Deliverables • Analyse logs and replicate every critical crash or malfunction on staging • Patch PHP endpoints (auth, payments, trip lifecycle) and corresponding Kotlin client calls so responses remain consistent and version-safe • Write or update automated tests for each fix • Push to staging for my QA sign-off, then deploy to production with zero downtime using our rolling-release script • Provide a short hand-over note summarising each issue, steps taken, and files touched Acceptance criteria: each patched flow (login, trip request, driver match, payment capture, trip completion) must run end-to-end five times consecutively on both staging and production without error, verified through logs and test rides. If you have a track record of firefighting on live PHP/Kotlin stacks and can start within hours, let’s talk and get these riders moving smoothly again.
Project ID: 39733592
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128 freelancers are bidding on average $20 USD/hour for this job

Hello, I am an experienced full-stack developer with deep expertise in PHP (Laravel-style) backends and Kotlin Android apps, ready to jump in immediately and fix your ride-hailing platform's critical bugs. What I offer: Analyze Firebase crash logs, New Relic traces, and error trackers to replicate and diagnose production-blocking issues on staging Debug and patch PHP REST endpoints (auth, payments, trip lifecycle) ensuring consistent, version-safe responses Update corresponding Kotlin client calls to maintain seamless interaction with backend fixes Write and extend automated unit and integration tests for each fix Deploy fixes to staging for QA, then production with zero downtime using your rolling-release workflow Provide detailed hand-over documentation summarizing issues addressed, technical steps, and files modified I have a proven track record of rapid, careful firefighting on live PHP/Kotlin stacks and can start within hours to restore smooth operation for your riders and drivers. Best regards, Vicky Keswani
$20 USD in 40 days
9.5
9.5

⭐⭐⭐⭐⭐ Hello Valuable Client, CnELIndia together with Raman Ladhani can help you stabilize your ride-hailing platform swiftly and with zero downtime. We will begin by analyzing your Firebase crash logs, New Relic traces, and error tracker to replicate issues on the staging server. Once reproduced, we will isolate the root causes across both the PHP backend and Kotlin apps. Our team will patch the PHP endpoints related to authentication, payments, and trip lifecycle while ensuring consistent, version-safe responses for the Kotlin client calls. Each fix will be accompanied by updated or new unit/integration tests to validate stability. We will then push changes to staging for your QA validation, followed by a rolling-release deployment to production to avoid service disruption. Finally, a concise handover document will be provided detailing every issue fixed, the files updated, and test confirmations. Our proven expertise in firefighting PHP/Kotlin stacks ensures smooth, reliable trip flows from login through completion.
$20 USD in 40 days
9.0
9.0

Hello, I just went through your job description and it surely fits my expertise. I have strong hands-on experience handling PHP backends with Laravel-style structures along with Kotlin-based Android apps, especially in live ride-hailing or real-time platforms. I understand the urgency of your situation where production-blocking bugs need to be resolved without impacting drivers and riders already on the road. My approach will be to quickly analyse Firebase crash logs, New Relic traces, and error trackers, replicate the critical crashes on staging, and then patch both PHP endpoints and corresponding Kotlin client calls to ensure version-safe consistency. Each fix will be backed by automated/unit tests, a clean Git commit history, and staged QA validation before deploying through your rolling-release setup to guarantee zero downtime. You can rely on me for fast debugging, stable fixes, and clear documentation on each issue resolved. Let’s connect so we can finalize milestones and timeline, and get your riders moving smoothly again. Looking forward to your response. Best regards, Mayur
$20 USD in 40 days
8.8
8.8

Dear Vincent N., I'm writing to offer my expertise for your "Ride-Hailing PHP Kotlin Bug Fixes" project. I understand you're experiencing urgent, production-blocking bugs on your live custom PHP backend and Kotlin mobile apps, requiring an experienced full-stack developer who can jump in immediately. My strong background in PHP (Laravel-style) and Kotlin, combined with a proven track record of firefighting on live systems, makes me an ideal fit. I'm adept at leveraging tools like Firebase and New Relic for rapid debugging, identifying root causes, and implementing stable, version-safe fixes. My approach will involve quickly replicating issues on staging, patching your PHP API and Kotlin client calls, and ensuring all fixes are thoroughly tested with automated tests before a zero-downtime production deployment. I am ready to start within hours. Let's discuss how I can get your riders moving smoothly again. Sincerely, Navneet
$15 USD in 7 days
7.7
7.7

Hi, I reviewed your project description and understand that recent code changes have introduced production-blocking bugs in your PHP and Kotlin-based ride-hailing platform. We can certainly assist in identifying the root causes and deploying stable fixes without causing any disruption for your users. I see you need an experienced full-stack developer to analyze logs, replicate crashes, patch PHP endpoints and corresponding Kotlin client calls, write/update automated tests, and provide a summary of each issue along with the steps taken. This sounds like a critical task and we're ready to get started. One question I have is, are there any specific areas of the app where the malfunctions are more frequent? And could you provide some insight into the complexity and functionality of the 'trip lifecycle'? We are confident in our ability to deliver on this project, having previously handled similar firefighting tasks on live PHP/Kotlin stacks. I'd be happy to share examples of our past work and discuss further in private chat once we connect. We are ready to start immediately and look forward to working with you to get things moving smoothly again. Let's connect further to discuss the specifics and how we can best address your needs. Best Regards, Rohit
$22 USD in 30 days
8.2
8.2

Hello, With over a decade of experience in Full Stack Development, particularly focusing on PHP and Laravel (which your platform is built on), my team and I can ensure a seamless resolution to your halted rider-hailing platform. We’ve spent years honing our skills in fixing complicated issues, especially on live stacks, ensuring we locate the root cause promptly while causing minimal disruption to operations – exactly what you need right now. As far as our capabilities go, our proficiency isn't just limited to backend repair; we also excel in Android app development with Kotlin. This dual expertise helps us deliver comprehensive solutions for your interconnected PHP and Kotlin environment. We promise to patch up not only the PHP endpoints but also correspondingly align the Kotlin client calls to save you from any version mismatch. Test rides, too, will demonstrate our reliable fixes, with each patched flow thoroughly tested and ready for smooth operation repeatedly at both staging and production levels. Let us connect to discuss further. Regards, Rajiv K
$18 USD in 40 days
8.0
8.0

Having successfully completed over 500 projects in my 8+ years of experience as a full-stack developer, I'm confident that I can bring quick, efficient and stable fixes to your ride-hailing platform. My proficiency with Laravel and PHP will allow me to swiftly locate the root causes of any bugs and employ version-safe patches that align your endpoints with their corresponding Kotlin client calls. Furthermore, my previous experience debugging live stacks aligns perfectly with your need for immediate action without disrupting the system. In addition to my problem-solving skills, I also offer comprehensive knowledge of Git-controlled codebases and REST/JSON APIs. This makes me an ideal candidate not only to identify and fix issues but also to provide clean, traceable commit history that streamlines maintenance down the line. Furthermore, I'm adept at writing automated tests ensuring each fix remains error-free in the long run. I understand the pressing nature of this project, and if chosen for the task, I can start within hours. With a flexible schedule and experience working across different time zones, my availability is aligned with your requirement for swift resolution.
$20 USD in 40 days
7.7
7.7

Hi there, I’ve reviewed your requirements and would be happy to assist. With over 10 years of experience in Android Native development (Java/Kotlin), I specialise in building robust, high-performance apps tailored to user needs. I ensure clean code, intuitive UI, and on-time delivery — keeping you updated at every step. Let’s connect and bring your app idea to life! Best, Bhargav Android Native Developer | 10+ Years Experience
$15 USD in 40 days
7.0
7.0

Hi Vincent, I’ve worked extensively with PHP and Laravel for over 15 years, leading teams and delivering successful projects. I’ve also developed multiple Android apps using Java and Kotlin, with one of my apps achieving 1 million downloads. As a full-stack developer, I can handle both backend and frontend tasks efficiently. I’m equally comfortable with server management and CI/CD pipelines, ensuring that all aspects of your project are well-managed. I’m available to start immediately and can dedicate 10–12 hours daily to your project. Let’s schedule a quick introductory call to discuss your requirements in more detail and see if I’m the right fit for your needs. I’m eager to learn more about your exciting project. Best regards, Adil
$25 USD in 40 days
6.9
6.9

Hello, I have carefully reviewed the requirements for the Ride-Hailing PHP Kotlin Bug Fixes project. I will promptly dive into the codebase, analyze logs, and replicate critical issues on the staging server. By patching PHP endpoints and updating Kotlin client calls, I will ensure consistent and version-safe responses. Automated tests will be written or updated for each fix to guarantee stability. The fixes will undergo QA sign-off on staging before deployment to production using a rolling-release script to minimize downtime. I am confident in my ability to swiftly resolve these bugs and ensure seamless operations for your ride-hailing platform. Let's discuss further details and begin working on this project. Thank you.
$25 USD in 40 days
6.2
6.2

Hello I can step in immediately to debug and stabilize your ride-hailing platform. I’ll use the staging environment, logs, and traces to replicate crashes, patch the PHP endpoints and Kotlin client calls, and ensure all flows (auth, payments, trip lifecycle) run consistently end-to-end. Each fix will be version-safe, covered by automated tests, and deployed with zero downtime. Thanks Anshuman
$16 USD in 40 days
6.3
6.3

Hello I’ve gone through your project details and I’ve worked on similar requirements in the past. I’m confident I can deliver this within your budget and timeline and less then 12 I’ve worked on similar projects before and can do this for you as well. Let’s connect in chat to discuss further and get started right away. Best regards Satyanarayan
$15 USD in 40 days
6.1
6.1

Hi, Vincent N. I 've check your project " Ride-Hailing PHP Kotlin Bug Fixes " carefully and understood what you want. I am senior full stack developer with 10 years of experience who is good at Laravel, Android, REST API, Kotlin, PHP, Full Stack Development, Mobile App Development and MySQL and I think I can complete your project with similiar experience. I would like to have a brief discussion for your project very soon. Best regards, Benjamin
$50 USD in 25 days
6.2
6.2

Hi there, ready to jump in immediately to stabilize your ride-hailing platform and fix production-blocking bugs without disrupting users. I understand you need urgent PHP/Kotlin fixes to ensure smooth trips and app reliability. I’ve successfully debugged live Laravel-style backends with Android clients, achieving zero-downtime releases. I can deliver stable end-to-end flows quickly, ensuring all critical endpoints work flawlessly. ➞ I’ll handle it by: 1. Analyse crash logs, Firebase traces, and New Relic data 2. Replicate bugs on staging and patch PHP/Kotlin endpoints 3. Run unit/integration tests and deploy to staging for QA 4. Iterate based on test rides and logs 5. Final review, production deployment with zero downtime & handover notes ➞ Timeline & Budget: Please note, this is a preliminary estimate. A finalised timeline and budget will be shared once the project scope is fully defined. ➞ Next Steps: Let’s connect to finalize the plan; I’ll start as soon as the project is awarded. Thanks & Regards, Tejash J.
$20 USD in 40 days
5.8
5.8

✋ Hi there. I can debug and fix your PHP backend and Kotlin Android apps to restore full functionality on your live ride-hailing platform. ✔️ I have experience resolving critical bugs on live ride-hailing and real-time apps built with Laravel-style PHP backends and Kotlin mobile clients. Previously, I fixed trip lifecycle, payment, and driver matching issues while maintaining zero downtime and stable user sessions. ✔️ I will start by analyzing Firebase crash logs, New Relic traces, and your error tracker to replicate each problem on staging. I will patch PHP endpoints and corresponding Kotlin calls, update or write automated tests for every fix, and ensure version-safe responses. ✔️ Once verified on staging, I will deploy updates to production using your rolling-release workflow, confirming that login, trip requests, driver matches, payments, and trip completions run end-to-end without errors. I will also provide a clear hand-over note detailing all fixes, touched files, and steps taken. Let’s chat so I can start immediately and ensure your riders and drivers have a smooth experience again. Best regards, Mykhaylo
$20 USD in 40 days
5.4
5.4

Hello, Hope you're doing great. I understand how critical stability is for a live ride-hailing platform—every crash impacts real people on the road. With solid experience in debugging PHP (Laravel-style backends) and Kotlin Android apps, I can step in immediately, trace production-level issues, and deploy safe, version-compatible fixes. My approach: analyze logs (Firebase, New Relic, error trackers), replicate issues on staging, then patch PHP endpoints and Kotlin client calls. I’ll write/update automated tests for each fix, keep a clean commit history, and push through your rolling-release script to ensure zero downtime. I have 4 years of experience in Website Development, Graphic Design, Website Design, Logo Design, WordPress, HTML, CSS, PHP, Full Stack Development, Website customization, theme customization, and API integrations. Let’s connect to discuss your vision—I’d love to bring this recruitment piece to life and help attract the next generation of firefighter/paramedics. Feel free to message me to get started! Regards, Adnan H.
$20 USD in 40 days
5.6
5.6

Hello, I am an expert with 15+ years of experience in the technical world, delivering simple to complex websites, e-commerce platforms, membership systems, and portal websites. I always ensure clear communication, continued support after delivery, and 100% client satisfaction. I specialize in Web Development, building modern, secure, and scalable websites with responsive design, API integration, and performance optimization. My focus is on delivering user-friendly, business-driven solutions that are future-ready. If you are looking for a dedicated Web Developer who provides quality, innovation, and timely delivery, I’d be glad to work on your project.
$15 USD in 40 days
5.4
5.4

----------------------- ✅✅✅✅✅ Top Rate Specialist HERE ✅✅✅✅✅ ----------------------- As a top-rated full-stack developer with expertise in Android, PHP, Kotlin, and Laravel, I'll be able to diagnose and troubleshoot the bugs in your ride-hailing platform with utmost speed and accuracy. My mastery over backend frameworks like Laravel will ensure that the stability of your platform is never compromised even during the bug-fixing process. Additionally, due to my familiarity with APIs, I will seamlessly collaborate with your existing system by understanding and updating your REST/JSON ones. In terms of replicating and patching the bugs, I can offer you a meticulous approach honed from years of AI automation experience. I will analyze the logs provided by Firebase, New Relic traces, and other error trackers you have, replicating each crash on staging to pinpoint their exact origin. To provide a robust long-term solution, I'll not only fix the current issues but also write or update automated tests for each fix thus cutting down on future troubleshooting time. I have invaluable practice and proven methods for successful zero-downtime deployment utilizing Git-controlled codebases like yours. My detailed notes summarizing each issue tackled will help make it easy for your QA team to understand the changes made accurately. Let’s restore tranquility to your ride-hailing platform together - choose me for an undiluted blend of efficiency and precision.
$20 USD in 40 days
5.1
5.1

Hello, I appreciate the detailed description of your project regarding the ride-hailing platform. I understand that you're experiencing critical production-blocking bugs after recent code changes, and timely resolution is crucial for your operation. With extensive experience in both PHP and Kotlin, coupled with a strong background in Laravel-style frameworks, I can jump in immediately to analyze the crash logs and replicate the issues on your staging environment. I will ensure that each patch maintains consistency across your API endpoints and mobile app interactions, employing a clean commit history to keep track of changes. Additionally, I will implement automated tests to validate each fix thoroughly. Your requirement for zero downtime deployment through a rolling-release script aligns perfectly with my previous experience, and I am committed to ensuring that all acceptance criteria are met with rigorous end-to-end testing. Thanks, Muhammad Umair
$25 USD in 25 days
5.2
5.2

Hello there Vincent N., Good afternoon! I am skilled mobile software engineer with skills including Full Stack Development, REST API, Android, Mobile App Development, MySQL, Kotlin, PHP and Laravel. Please contact me to discuss more about this project. Eager to hear your feedback Angel
$25 USD in 25 days
5.1
5.1

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