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I have the concept, wireframes, and an initial style guide ready; now I need a full-stack developer who can transform them into a production-ready mobile application built with Flutter on the front end and FastAPI on the back end. Core feature set • Every user should be able to create rich pet profiles that store photos, breed info, vaccination dates, and other medical records. • A robust appointment scheduler must let pet owners pick time slots, confirm, reschedule, or cancel directly in-app and receive push/email reminders. • Integrated search will allow owners to find nearby groomers, vets, and sitters, view ratings and written reviews, and book them instantly. Account structure & roles Secure authentication is required. We’ll need at least two clearly separated roles—pet owners and service providers—with the usual flows for sign-up, login, password reset, and social login (Google/Apple) if you’re comfortable adding them. Owners should only manage their own pets and bookings, while providers can manage availability, pricing, and see their incoming appointments. Tech expectations • Flutter (null-safety, latest stable channel) with clean architecture and state management of your choice (Provider, Riverpod, or Bloc—explain your pick). • FastAPI for all REST endpoints, JWT-based auth, and async SQLAlchemy (or comparable ORM) connected to PostgreSQL. • CI/CD: GitHub Actions or GitLab CI to run tests and generate APK/IPA artifacts. • Basic admin interface—FastAPI Admin, Django-admin hybrid, or a simple React dashboard—to view users, pets, and bookings will be a plus. Deliverables 1. Complete Flutter project with well-documented code and unit/widget tests. 2. FastAPI backend, tests, [login to view URL], and OpenAPI schema auto-generated. 3. Postman or Insomnia collection demonstrating each endpoint. 4. One-click deployment instructions for a Docker-based setup (backend + Postgres) and a guide for publishing the mobile app to TestFlight/Google Play Internal Testing. 5. README covering environment variables, migration steps, and how to run the test suite. Acceptance criteria – User can register as owner or provider, log in, and stay authenticated via refresh tokens. – Owner can create a pet profile, upload a PDF vaccination record, and see it listed. – Owner can search for providers within 10 km, view ratings, and book a slot; provider sees the new booking appear instantly (WebSocket or long-poll is fine). – All endpoints return ≤200 ms locally and are protected against common OWASP vulnerabilities. – All code passes the provided test suites and lints with no critical warnings. Timeline is flexible within reason, but please share realistic milestones. Looking forward to collaborating and seeing your past Flutter/FastAPI work!
Project ID: 40655224
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A Warm Hello! We are readily available to start working on this project! We are a full-stack development agency with strong experience in Flutter mobile applications, Python/FastAPI backends, PostgreSQL, real-time systems, API integrations, authentication, and cloud deployment. Because your wireframes and style guide are already available, we can move quickly into implementation while maintaining close attention to pixel accuracy, performance, and usability. We are available to start immediately and would be happy to review your wireframes and style guide, confirm the final technical scope, and provide a detailed timeline and fixed milestone plan. Best regards, Ana
$20 USD in 40 days
10.0
10.0

Dear , I am excited about the opportunity to work on your Flutter-FastAPI Pet App Build project. With your concept, wireframes, and style guide in hand, I am confident in my ability to bring your vision to life. I have extensive experience in developing mobile applications using Flutter and building robust back-end systems with FastAPI. Your core feature set aligns perfectly with my skill set, and I am eager to create a user-friendly app that meets all your requirements. I am well-versed in implementing secure authentication systems and managing different user roles effectively. I will ensure seamless integration of the appointment scheduler and search functionalities to provide a smooth user experience. My technical expertise with Flutter, FastAPI, PostgreSQL, and CI/CD tools will enable me to deliver a high-quality solution that exceeds your expectations. I am committed to delivering well-documented code, thorough testing, and clear deployment instructions. I am confident that my past experience and technical skills make me a perfect fit for this project. I look forward to discussing realistic milestones and collaborating with you to create a successful mobile application. Please find my portfolio links for your review: https://www.freelancer.com/u/Microlent Thank you for considering my proposal. I am eager to be a part of this exciting project. Best regards,
$15 USD in 40 days
9.6
9.6

With over a decade of experience in full-stack architecture and high-scale systems, I understand your need for a Flutter-FastAPI Pet App Build project that requires seamless integration of front-end and back-end technologies to bring your vision to life. My background in handling complex systems, such as creating apps serving over 1 million users, positions me well to tackle the challenges your project presents. One strategic insight I would offer is to prioritize clean architecture and state management in Flutter to ensure scalability and maintenance ease. My past success stories, like building Telegram Mini Apps for a large user base, showcase my capability in handling projects of similar complexity. I invite you to reach out to further discuss how I can meet your project goals effectively. Let's connect to explore the roadmap for your Flutter-FastAPI Pet App and ensure its successful implementation.
$20 USD in 15 days
9.1
9.1

Hi, Your concept and wireframes are a great starting point. Sphinx Solutions (CMMI Level 3 | 16+ Years | 1000+ Projects) can help transform them into a secure, production-ready pet-care platform using Flutter + FastAPI + PostgreSQL. We can handle pet profiles, medical records, appointments, provider search, bookings, notifications, role-based authentication, admin, CI/CD, testing and deployment. For Flutter, we would recommend Riverpod for clean, scalable state management and maintainability. Question: Could you share the wireframes/style guide and let us know if the backend/API architecture is already defined, or should our team handle the complete architecture as well? Happy to share relevant work and a milestone-based timeline after reviewing the materials. One team. One architecture. From wireframe to production.
$20 USD in 40 days
8.7
8.7

As a seasoned developer proficient in both Flutter and FastAPI, I am confident in my ability to bring your pet app vision to life. I have the skills required to create a fully functional, user-friendly mobile application with clean architecture, robust state management (preferably Provider), and the latest null-safety features provided by the stable channel of Flutter. Rest assured, I will prioritize performance, security, and scalability while developing the front end. On the backend, my experience with FastAPI and PostgreSQL paired with async SQLAlchemy ORM or a comparable alternative equips me to deliver REST endpoints secured with JWT-based authentication. To ensure flawless user experience, seamless deployments aided by CI/CD tools like GitHub Actions or GitLab CI are essential in my workflow. An admin interface will also be implemented to keep track of users, pets, and appointments for improved administration. My proficiency does not end there; it extends to well-documented code complemented by thorough unit/widget tests - a combination that guarantees reliable products. Not only will I provide elaborate documentation on how to deploy, run tests, and manage environments, but also efficient one-click deployment instructions comprising Docker-based setup for the backend and Postgres. Combine this tech-savvy approach with my proactive communication style and knack for turning ideas into real products; your project is in safe hands. Lets chat
$20 USD in 40 days
8.9
8.9

Could you please share the existing wireframes, style guide, complete user flows, and any API/data requirements you already have? Also, how many screens and provider categories should be included in the initial release, and do you already have the required Google Maps/location service, push notification, email, and Google/Apple developer accounts? For provider discovery and booking, should providers be able to define recurring availability, blackout dates, service durations, pricing, and multiple locations? Also, please confirm whether payments are required in this MVP or whether booking is confirmation-only, and whether the 10 km search radius should be based on the user’s live GPS location.
$15 USD in 20 days
9.0
9.0

Flutter-FastAPI Pet App Hello I have read your project requirements, i can help you develop a high-quality pet app using Flutter for your mobile front end and FastAPI for the backend. I’ve taken on challenging projects of similar complexity and successfully delivered them on time. Our team has built over 1500 projects across multiple platforms, including Flutter and FastAPI building mobile applications extensively. I’ve successfully launched multiple production apps across Google Play and App Store, delivering secure, optimized, and user-friendly solutions. ⭐Due to NDAs, links aren’t public—but once you open the chat, I’ll share live demos and walkthroughs. I’d be happy to discuss your requirements and execution plan. Bid amount is a placeholder and can be discussed over chat. Thanks & Regards Ranjana
$20 USD in 40 days
8.1
8.1

★★★ FLUTTER AND FASTAPI SPECIALIST ★★★ Hi, I can build a production-ready mobile app with Flutter and FastAPI for your pet profile project. I will create rich pet profiles, an appointment scheduler, and a secure authentication system for users and service providers. I will use Flutter with Riverpod for state management and FastAPI for the backend. I will ensure all features work smoothly and meet your requirements. Let’s discuss your project further. I am excited to help you bring this to life! Thanks!
$20 USD in 40 days
8.2
8.2

Hello, I your "Flutter-FastAPI Pet App Build" project description in detail and undertood your requirements. I've worked on many PHP projects in recent times. So I am confident on achieving your expected Goals. Please initiate a communication thread to discuss further and start with the project. ⭐ 5.0/5 from a recent client: "A more professional version: “Excellent work! The job was completed within the committed timeline. Great quality, professionalism, and timely delivery. Highly appreciated and recommended.”" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
$15 USD in 1 day
8.0
8.0

Hey there, The key part of this app is getting the owner/provider permissions and booking state right from the beginning. Pet ownership, medical record access, provider availability and appointment changes all need to be enforced by the FastAPI backend not just hidden in the Flutter UI. I would structure the build around your Flutter + FastAPI/PostgreSQL stack, with refresh token authentication, role based API authorization, provider availability, booking updates, and the 10 km discovery flow treated as core workflows rather than separate features. The vaccination PDF flow and booking notifications also deserve proper validation and access controls. I would break delivery into authentication/roles, pet profiles, provider discovery, scheduling/booking, admin and notifications, then testing and CI/CD, with each milestone producing a testable build. For the Flutter state-management choice, I would be happy to discuss Riverpod vs Bloc based on the existing wireframes and architecture. Best regards, Hammad Hassan
$20 USD in 40 days
7.9
7.9

Flutter & FastAPI Pet Care App I can build your production-ready pet care app using Flutter and FastAPI, following your existing wireframes and style guide. Here's my approach: → Build pet profiles, medical records, PDF uploads, and photo management. → Develop appointment scheduling, reminders, rescheduling, cancellations, and bookings. → Add owner/provider roles, JWT authentication, Google/Apple login, and secure access control. → Build nearby provider search, ratings, reviews, and real-time booking updates. → Set up PostgreSQL, async SQLAlchemy, tests, CI/CD, Docker deployment, and documentation. Stack Flutter + Riverpod → FastAPI → PostgreSQL → SQLAlchemy → Docker → GitHub Actions Flow UI Integration → Authentication → Pet Profiles → Provider Search → Booking → Admin → Testing & CI/CD Let's connect... Thanks
$18 USD in 40 days
8.2
8.2

Hi there, Based on my understanding, you need a production-ready Flutter + FastAPI pet-care app where owners can create pet profiles, manage medical records, find nearby service providers, and book appointments, while providers can manage availability, pricing and bookings. I can build the Flutter app with clean architecture, secure JWT authentication, PostgreSQL/FastAPI backend, role-based access, provider search, ratings, appointment scheduling, document uploads, notifications and real-time booking updates. I’ll also structure the project with testing, API documentation, Docker deployment and CI/CD as required. A couple of questions I would like to clarify: 1. Are the wireframes and style guide finalized for all owner, provider and booking screens? 2. Do you already have preferred services for hosting, file storage, push notifications and Google/Apple login? There are a few other details I’d like to discuss around real-time bookings, location search, medical records and admin functionality, but due to Freelancer.com's character limit I can't cover everything here. Please open a chat with me so we can discuss the requirements, milestones, timeline and cost for the complete app.
$20 USD in 40 days
8.0
8.0

Hi, I build production Flutter apps on FastAPI backends, and the provider-sees-booking-instantly requirement is the part I'd nail down first. I'd use Pusher-style WebSockets over long-poll here since reschedule and cancel events also need to push live, not just new bookings. On state management I lean Riverpod for this kind of role-split app, it keeps owner and provider scopes clean without Bloc's boilerplate. For the real-time and event mechanics, we ran live attendee engagement across web and mobile with WebSocket push for a two-year event platform. ADFW(Abu dhabi finance week): Laravel, React Native, AWS, OAuth/SSO One question: are vaccination PDFs stored on S3-style object storage, or in Postgres? That decides the upload flow. Adil
$22 USD in 40 days
7.6
7.6

As an experienced full-stack developer with a decade of professional software engineering under my belt, I am admirably skilled to undertake your pet application project. My expertise embraces both Flutter and FastAPI but what distinguishes me is my proficiency in various idioms, including Android development, PHP and PostgreSQL. Integrating these skills, I not only deliver a powerful application but also a robust backend infrastructure ensuring all REST endpoints are JWQ-based auth protected and query time is low. I value clean architecture and understand the importance of the user experience while also providing sufficient control interfaces for providers. That's why I prefer using Flutter state management tools like Provider or Riverpod, which I have commendable hands-on experience on. Also, I'm committed to unit testing the codebase and ensuring it complies with all system requirements and doesn't have any critical warnings. One aspect where I stand out is the rigorous documentation of the code and delivery artifacts including; well-commented source codes for better readability & navigation, Dockerized deployment instructions with one-click setup guide as requested by you. Moreover, I can ensure that OpenAPI schema is auto-generated from FastAPI which makes codebases clearer and allows front-end APIs development parallel to back-end without being error-prone and proper functioning. To be concise, my skill set is aligned precisely with your project needs
$20 USD in 40 days
8.0
8.0

Hello, I am very interested in your project to develop a mobile application using Flutter on the front end and FastAPI on the back end. I have a strong background in Flutter, Mobile App Development, PHP, Android, iPhone, and PostgreSQL, making me well-equipped to meet the project requirements. I understand the core features required for the application, such as creating rich pet profiles, appointment scheduling, and integrated search functionalities. My plan involves utilizing clean architecture and state management in Flutter, along with FastAPI for the backend, JWT-based authentication, and PostgreSQL for data storage. - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I would love to discuss this project further and share my ideas on how to bring your concept to life. Looking forward to the opportunity to collaborate. Best regards, Warda Haider
$15 USD in 40 days
7.0
7.0

Hi, I can show you my similar Pet platform and i understand the key challenge is connecting pet profiles, medical documents, provider discovery, and appointment scheduling into one reliable experience while keeping owner and provider permissions completely separated. Real time booking updates and secure document handling also need careful backend design. I can build the Flutter app with Riverpod and clean architecture, backed by FastAPI, PostgreSQL, async SQLAlchemy, and JWT refresh authentication. I will implement pet profiles, PDF uploads, provider search within 10 km, ratings, availability, booking workflows, reminders, social login, and real time appointment updates. The backend will include proper authorization, validation, tests, OpenAPI documentation, Docker setup, and CI pipelines. I will also provide the requested Postman collection, deployment guide, and mobile publishing documentation. Would you like the first milestone to cover the authentication, database structure, and core pet profile flow?? I will also provide you 3month of free post launch after the launch including bug fixes and maintenance to ensure everything runs smoothly also your project is a great match for my skill set ican provide an efficient scalable and well structured solution that meets your needs. Let’s turn your project into measurable results. My portfolios, https://www.freelancer.pk/u/zainalitariq245 Looking forward to discussing your project further. Best Regards, Zain A.
$20 USD in 40 days
6.8
6.8

Your appointment system will fail under concurrent bookings if you don't implement row-level locking in PostgreSQL—two owners can grab the same time slot simultaneously, causing double-bookings that destroy provider trust. Quick questions - are you planning real-time notifications via WebSocket or Firebase Cloud Messaging for instant booking alerts? And what's your expected user load at launch so I can size the database connection pool correctly? Here is the architectural approach: - FLUTTER: Build modular feature layers with Riverpod for state management, isolate-based image compression for pet photos, and secure token storage using flutter_secure_storage to prevent auth leaks. - FASTAPI + POSTGRESQL: Design async endpoints with SQLAlchemy ORM, implement pessimistic locking on appointment transactions to prevent race conditions, and add PostGIS extension for geospatial provider search within radius queries. - CI/CD: Configure GitHub Actions pipelines that run pytest coverage checks, build signed APK/IPA artifacts, and auto-deploy backend to Docker containers with zero-downtime rolling updates using health checks. I've built 4 Flutter+FastAPI systems for healthcare and service marketplaces that handle 10K+ daily bookings without slot conflicts. Let's schedule a 20-minute call to walk through your wireframes and confirm the WebSocket architecture before I draft the technical spec.
$18 USD in 30 days
6.7
6.7

Hi there, Hope you are doing well I’d be happy to transform your existing concept, wireframes, and style guide into a production-ready pet care mobile application using Flutter and FastAPI. We have experience developing Flutter applications, appointment/booking platforms, location-based services, role-based systems, secure authentication, file uploads, reviews, notifications, and scalable REST APIs. Recommended Technology Stack Mobile: Flutter (latest stable, null-safety) Architecture: Clean Architecture + Riverpod Backend: FastAPI + Python Database: PostgreSQL Core Features Pet Owner Secure registration/login Google/Apple social login Pet profiles with photos and breed information Vaccination and medical records PDF document upload Search nearby vets, groomers and sitters Provider profiles, ratings and reviews Appointment booking/rescheduling/cancellation Booking history Push/email reminders Service Provider Provider registration and profile Service/pricing management Availability and time-slot management Incoming appointment management Booking status updates Ratings/reviews Admin User and provider management Pet and booking overview Provider moderation Basic reporting/dashboard Thanks & Regards Dheeraj K.
$15 USD in 40 days
7.2
7.2

Hi there, I see that you’re looking for a full-stack developer to bring your concept and wireframes for a pet app to life using Flutter and FastAPI. I can implement the required rich pet profiles, appointment scheduling, and user role management while ensuring secure authentication is prioritized. I also have insights into your tech expectations and would prefer using Riverpod for state management, ensuring clean architecture throughout the application. Your satisfaction is my priority and I guarantee that I will deliver you a high-quality result. Regards, Ali
$15 USD in 1 day
6.4
6.4

As a seasoned full-stack developer with over 13 years of experience in building complex, high-performance applications, I'm confident that my skill set perfectly aligns for the Flutter-FastAPI Pet App Build project. Having developed and managed multiple mobile applications, including Native Android and iOS Apps as well as Hybrid Mobile Apps with React Native, empowered me with a profound understanding of the mobile application ecosystem. In regard to your core feature set requirement which includes pet profiles, appointment scheduling, and integrated services search; I have the technical know-how to actualize these functionalities seamlessly within your application. In terms of backend development, I have extensive experience working with REST APIs (FastAPI) and using JWT-based authentication mechanisms which are crucial for securing user roles (pet owners and service providers) while ensuring smooth authentication process across different roles. The fact that I have worked on React dashboards before as an added advantage keeps me feeling extremely confident about delivering this project
$20 USD in 40 days
6.4
6.4

Luanda, Angola
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