In-App OTP Feature Integration

@mrresearcher99

Hi, I can implement the secure OTP hand-over flow in your existing food-delivery system. I have 5+ years of experience in Android, React Native, Java, and Flutter, and have worked on production delivery and real-time apps, so I’m comfortable extending your current architecture without breaking existing flows. Approach: Generate server-side single-use 6-digit OTP when order moves to “out for delivery.” Enforce strict time-based expiry and instant regenerate support. Secure validation endpoint for Delivery Partner app to confirm hand-over. Atomic status update to mark “delivered” and notify Restaurant/Admin apps. Proper logging and edge-case handling (retry, mismatch, expired). Ensure builds respect Google 16-kB native library alignment. Mobile updates: Customer app: OTP display + regenerate trigger Delivery app: secure OTP entry + validation flow Maintain current naming conventions and clean modular code Deliverables: updated backend + both apps, signed APKs, and brief build/setup notes. I can start immediately and ensure the flow is production-safe and fully tested. Let’s proceed. Best, Bhargav

@abhishek060

Hi, I can implement a secure OTP handover flow in your existing React Native + Spring Boot system with time-based expiry, instant regeneration, and seamless backend sync without affecting current architecture. I’ll deliver updated modules, signed APKs, and clean setup notes so your team can rebuild and deploy confidently. Can we discuss on chat. Regards Abhishek

@shivam981994

Hi, This is a clean, well-defined enhancement — and it can be implemented without disturbing your current architecture. I can implement a secure OTP handover flow with: ✔ Backend-generated, single-use 6-digit OTP (stored hashed in MySQL) ✔ Exact 30-minute expiry logic (configurable via server) ✔ Immediate regenerate option (invalidate previous code instantly) ✔ Delivery Partner validation endpoint (atomic verification + status update) ✔ Auto-update “delivered” status across Restaurant & Admin apps ✔ Proper logging for audit trail On the React Native side: • Customer app: secure OTP display + countdown timer • Delivery app: OTP input + verification call • No architectural changes, naming conventions preserved • 16-kB native library alignment respected during build • Signed APKs provided I’ll ensure the flow is transaction-safe (no double delivery confirmation) and fully synced with backend logs. Happy to start immediately and deliver clean, production-ready code with brief build notes for your team.

@NEHABHAT92

With a decade of industry experience, I've amassed a comprehensive skill set that perfectly aligns with your project needs. From being adept in Android and Mobile App Development to having an impeccable grasp of MySQL and React Native, I bring to the table the exact expertise required to integrate the In-app OTP feature to your food-delivery platform. Your project specifies the use of Java and Spring Boot, both within my proficiency spectrum, which ensures that I can quickly adapt to your existing architecture without disruption. Furthermore, my attention to detail mirrors your need for alignment with Google's 16-kB native library requirement, and I intend to create code that is play-store ready. Lastly, as a value-addition, my company offers free 3 months support post-project completion. This will guarantee that not only do you get impeccable deliverables -- including updated source code for all modules, signed APKs for the affected apps, and reproduction setup notes -- but also a committed support system after acceptance. Let's turn your **idea into reality** efficiently and cost-effectively. Choose me for a great project experience!

@Web1devloper

Having reviewed your project, I am confident that my extensive experience in mobile app development, particularly with React Native and Java, makes me the ideal candidate to successfully integrate the OTP feature into your food-delivery platform. My background spans eight years developing high-performance cross-platform applications, delivering custom solutions tailored to various industries like logistics and fintech to name a few. Not only do I have proven skills in Java and Spring Boot, but I am also well-versed in Firestore and MySQL which are essential for ensuring robust backend development. Moreover, my adeptness at UI/UX design implementation will be instrumental in efficiently aligning with Google's native library requirement while maintaining the integrity of your current architecture. What sets me apart is not just technical excellence but also a strong commitment to clear communication and end-to-end project management. I prioritize delivering high-quality code within set deadlines, as exhibited in previous projects like ANCOR (React Native, MongoDB) and Onit (React Native, Node.js). Put simply, if you entrust this project to me, you're choosing reliability, quality and skilled execution.

@SmartCodeDev

Hi — I’ve implemented OTP-based delivery confirmation flows before and can add this without disturbing your current architecture. On “out for delivery”, the Spring Boot backend will generate a cryptographically secure 6-digit OTP, hash it, store it with a strict expiry, and expose it via a protected endpoint. The Customer app fetches and displays the code, supports instant regeneration (invalidating the previous token), and shows a countdown timer. The Delivery Partner app submits the code on arrival; the backend validates it, marks the order delivered, and triggers status updates for restaurant and admin channels. I’ll implement server-side expiry enforcement, replay protection, and rate limits to prevent brute-force attempts. Sync and delivery state changes will run inside a transaction to ensure consistency across all apps and logs. Tech approach React Native (Android, Java modules) • Spring Boot • MySQL • secure OTP generation (SecureRandom) • hashed storage • REST endpoints • transactional status updates. Build outputs will respect Google’s 16-KB native library alignment requirement and include signed APKs plus concise build/setup notes so your team can reproduce everything. This will deliver a reliable handover confirmation flow with fast verification and clear audit trails.

@Ak230598

Hello, I CAN DO THIS. I have 6.5+ years of experience in this field. Let's connect and discuss more about your requirements. Thank you.

@devvoyager

Hi, I see you need a secure OTP-based delivery confirmation flow integrated into your existing React Native + Spring Boot ecosystem. I’ve implemented time-bound verification systems with clean backend validation and minimal architectural disruption. I specialize in: React Native app enhancements (Android) Spring Boot secure API development Time-based OTP logic & workflow automation Approach: Implement server-side OTP generator with expiry, Sync with Customer & Delivery apps, Preserve architecture, Deliver signed APKs + build notes What sets me apart: Secure, scalable validation logic Clean integration without breaking existing flows Production-ready delivery We can negotiate the budget Ready to implement a dependable OTP confirmation system within your current stack.

@rishi9343

As an accomplished mobile app and software developer with a solid 8+ years of experience, I am certain that I have the professional competence and dedication needed to easily integrate your in-app OTP feature into your multi-app food-delivery platform. My proficiency in using React Native (Android), Java, and Spring Boot aligns perfectly with the technical requirements for this project. I can confidently secure a hand-over confirmation flow for you by creating an automatic OTP generation system using time-based expiry mechanism. I fully understand your need for clean, reliable code that aligns with Google’s standards. Having distributed several APKs outside Play Store before, I’m well-versed with the necessity for maintaining the 16-kB native library alignment throughout the build. With my enhanced commitment to precision, your existing architecture, naming conventions and no change requirements would be strictly adhered to.

@rakeshkumar1684

As an experienced software developer with a strong background in API and backend development, I feel confident in my ability to assist you with your app's OTP feature integration. I have extensive proficiency in programming languages such as Java, which you mentioned is the backbone of your platform's backend. Additionally, my skills in MySQL, React Native and Spring Boot align perfectly with your tech stack which would allow me to provide the best possible solution. Lastly, my dedication to providing high quality outputs consistently sets me apart from others. In this project, I guarantee deliverables that include updated backend, customer and delivery modules' code as well as signed APKs for your two critical mobile apps. Moreover, I understand the importance of documentation so that subsequent reproductions are effortless for your team. This project is not just about delivering secure OTPs but also ensuring smooth communication flow from the customer, through the delivery partner and all the way to the restaurant and admin applications. With me on board, you can be confident of an integrated solution that enhances both security and efficiency across your platform.

@aprkdream

Hello, I can implement the secure OTP-based delivery confirmation flow within your existing React Native (Android) and Spring Boot architecture without disrupting current modules. Implementation Approach: • Generate secure 6-digit OTP server-side when order status = “Out for Delivery” • Store hashed OTP with 10-minute time-based expiry (configurable) in MySQL • Allow immediate re-generation with previous OTP invalidation • Delivery Partner app validation via secure API endpoint • On successful match → update order status to “Delivered” and trigger sync across Restaurant & Admin apps • Maintain existing naming conventions and architecture Technical Assurance: • Spring Boot REST API with proper validation & transactional updates • Clean React Native integration (no architecture changes) • 16-kB native library alignment maintained during APK build • Signed, install-ready APKs will be provided • Clear setup & build documentation included I focus on clean, production-ready code and smooth handover. Ready to start immediately. Best regards, [Anil Prajapati]

@pasion0128

Hello, Your OTP-based delivery confirmation flow is a clean, security-focused enhancement and fits perfectly into your existing React Native + Spring Boot architecture. Since your platform is already stable, the goal here is to introduce a time-bound, single-use verification mechanism without disrupting current order lifecycle logic. duration - 8 working days price - 800

@khushiArt

As an accomplished Android developer with extensive experience in Mobile App Development, I believe I am the perfect candidate to fulfill your project needs. While I acknowledge my core skills lay in Graphic Art designing and 3D Animation, I have always enjoyed expanding my horizons and embracing new challenges, allowing me to diversify my expertise and skills. My UI/UX design et al, coupled with my knowledge of React Native (Android only) using Java modules aligns perfectly with your requirement. I understand the importance of security and seamless functionality of a food-delivery platform. Building an efficient OTP feature like yours requires not only technical know-how but also attention to details - a characteristic trait that defines my work. I will meticulously follow Google’s 16-kB native library alignment requirement throughout the build process so that the efficiency doesn't waver just because you are sideloading and not distributing via the Play Store.

@growwithgdp

✅ I will implement secure OTP flow with generation, regeneration, and expiry logic in React Native + Spring Boot. ✅ Strong backend experience ensures reliable validation, sync, and status updates across all apps. ✅ I’ll maintain existing architecture and ensure 16KB alignment compliance. ✅ Delivering tested code, APKs, and clear setup documentation.

@ssldevmaster

Hi, I can easily DO your work IN 24 HOURS, DM me now to get started, PRICE NEGOTIABLE 100% Work satisfaction is provided

@amulk9

Hi there, I can implement a secure OTP-based handover flow exactly within your existing architecture. I’m a senior developer with strong hands-on experience in React Native (Android), Java, Spring Boot & MySQL, and I’ve delivered similar time-bound OTP and delivery-confirmation systems before. I’ll add a single-use, auto-generated 6-digit OTP, strict time-based expiry, instant re-generate logic, and seamless sync across Customer, Delivery Partner, Restaurant & Admin—without touching unrelated features or naming conventions. I’m also fully aware of Google’s 16-kB native library alignment and will ensure clean, signed APKs. I can start immediately and deliver fast. Happy to discuss edge cases and get this live right away. Thanks Amul

@sanketpatil51515

Hi, I’m Sanket, a full-stack developer experienced in React Native + Spring Boot systems with structured backend workflows and real-time status updates. Since your food-delivery platform is already live, I understand this is a focused enhancement — adding a secure OTP-based handover flow without disturbing the existing architecture. What I’ll Implement • Auto-generate 6-digit OTP when order status becomes “Out for Delivery” • Store hashed OTP in backend (Spring Boot + MySQL) • 30-minute time-based expiry (configurable) • Instant re-generate option (invalidate previous code) • Delivery Partner app verification screen • On successful match → mark “Delivered” + trigger status sync to Restaurant & Admin Technical Approach • Backend: Spring Boot service layer update (secure OTP logic + expiry scheduler) • DB: Timestamp-based validation with indexed fields • React Native (Android): UI update in Customer & Delivery Partner apps • Maintain existing naming conventions & architecture • Ensure 16-kB native library alignment during APK build Deliverables • Updated backend + both mobile source codes • Signed APKs (Customer & Delivery Partner) • Setup/build notes for reproduction I’ll ensure the test scenario works perfectly: fresh OTP, immediate regenerate, expiry handling, and proper backend logging. Ready to start immediately. — Sanket

@vishalq88

I run VixLabs, where we have a dedicated team experienced in developing mobile applications, web solutions, and AI agent systems. We have worked on multiple projects across different domains and are confident in delivering quality solutions. I would appreciate the opportunity to collaborate on your upcoming app projects. Please let me know a convenient time to discuss further.

@Robertx2002

I’ve reviewed your requirements for implementing a secure hand-over confirmation flow in your multi-app food-delivery platform. You need a time-sensitive, single-use OTP system integrated within your React Native (Android) Customer and Delivery Partner apps, backed by your Spring Boot server, while respecting strict native library size constraints and preserving current architecture. I’m the perfect fit for your project. My expertise in React Native and Java backend development enables me to build a robust OTP generation and validation mechanism that ensures real-time synchronization across apps and backend, improving delivery accuracy and operational transparency. While I am new to Freelancer, I have extensive experience delivering successful projects off-platform. I’m happy to offer a slightly reduced initial rate in exchange for your honest review once satisfied. How soon would you like to discuss the project timeline and next steps?