Budget: 27000 UAH Deadline: 31 days
📌Hello.👋
⭐️My name is Andrey.
⭐️My work experience: 12 years+
• ➡️I can show works specifically in Application Development
• 🎨Portfolio: 
Freelancehunt
• ✅Work rating on Behance (over 600,000 views)
• 💼More works here: 
Dribbble
Budget: 777 UAH Deadline: 7 days
Hello! I specialize in Flutter development for iOS and Android, ranking in the top 7 in the field of hybrid mobile applications on freelance platforms. I have experience in both independent app development from scratch to release and working in commercial companies. I have also published apps in the App Store and Google Play - from preparation to full release. Proofs are in the reviews.
To provide a cost estimate for the timelines, I need more details.
I will consult on all questions free of charge!
Budget: 27000 UAH Deadline: 1 day
Hello!
I have extensive experience in creating websites and applications (CMS, SPA, TMA). You can view examples of my work in my portfolio. I am ready to complete the assigned task.
I suggest we discuss the details in private messages.
Budget: 27000 UAH Deadline: 30 days
Hello! I can implement a turnkey project: from design to backend and mobile application. I offer architecture on Flutter + Node.js + PostgreSQL with scalability in mind, secure payment processing (Escrow/Split Payments), IoT integration, multilingual support, push notifications, and high performance, so the product is ready for international launch and further development.
Budget: 1000 UAH Deadline: 1 day
Hello, I have extensive experience.
Feel free to contact me privately.
I will be happy to help you!
Budget: 11111 UAH Deadline: 50 days
Good day, Serhiy.
The project is interesting. If we are to do it, we should start with a proper architecture, as there are many interconnected parts: Flutter, backend, payment system, IoT, push notifications, and challenge logic.
I would divide the work into stages (design → backend → mobile application → payment integration → IoT → testing) so that everything can be gradually checked and launched.
There are a few points I would like to clarify before the assessment:
whether the interaction protocol with the IoT device is ready;
which payment provider you plan to use;
if there is already a detailed technical specification or if it is just a concept for now.
After this, I will be able to provide realistic timelines and budget without "guessing estimates."
If convenient, please send the technical specification in private messages, I will take a look and provide a proposal for implementation.
Budget: 27000 UAH Deadline: 50 days
Hello!
I am a mobile app developer specializing in Flutter and React Native with over 20 launched apps! I also have a designer on my team.
We have extensive experience in Flutter development, implementing complex fintech schemes with Stripe and IoT integrations.
Our team includes an experienced UI/UX designer — we will create a unique neon Dark design in Figma or adapt an existing one to reduce the budget.
What we will implement:
Flutter (iOS/Android) + Node.js backend: stability and one codebase.
Stripe Connect: holding, splitting 15/85, and auto-payouts.
IoT and Anti-fraud: processing data from accelerometers, protection against fraud, Push < 1s.
OUR PORTFOLIO: https://www.kisolid.com/uk/portfolio
OUR LATEST MOBILE APPS:
iOS (App Store):
https://apps.apple.com/ca/app/ballbob-%D1%82%D1%80%D0%B5%D0%BD%D1%83%D0%B2%D0%B0%D0%BD%D0%BD%D1%8F-%D1%80%D0%B5%D0%B0%D0%BA%D1%96%D1%97/id6759486822
Google Play: https://play.google.com/store/apps/details?id=com.ballbob.app
https://apps.apple.com/ua/app/weeave/id6748585387
https://play.google.com/store/apps/details?id=com.weeave.app
https://apps.apple.com/ua/app/goldstadtaktuell/id1610112917
Budget: $4,500 – $6,000
Timeline: 7–9 weeks (about 2 months)
I would be happy to collaborate on the project!
Budget: 27000 UAH Deadline: 60 days
I see that the project is essentially large — design, frontend on Flutter, backend with escrow logic and payment splits, plus integration with an IoT sensor and anti-fraud on telemetry. I recommend starting not with everything at once, but with an MVP: first the SOLO mode with a basic wallet and IoT events, and then GROUP rooms with splitting and a leaderboard — this way you can quickly test all the financial logic on a real sensor before scaling to rooms and multi-currency. The stack is Node.js, which is well-suited for fast processing of push events from the sensor and maintains a consistent JS/TS stack with the Flutter team. I am ready to discuss the details and decomposition by stages.
Budget: 27000 UAH Deadline: 27 days
Hello! I work with Flutter, I can implement this project. Please provide more details - that would be great.
Budget: 27000 UAH Deadline: 30 days
Hello! The technical task is formulated extremely competently and in detail. The combination of Flutter, IoT telemetry (accelerometer + anti-fraud) and split payments through Stripe Connect Escrow is a strong and workable architecture.
I specialize in complex custom development (Next.js/React, Node.js, mobile interfaces) and creating high-load server systems with strict requirements for UX and transaction security.
How we will implement your project turnkey:
UI/UX Design (Figma): We will create a technological Dark Mode with a deep graphite background and neon accents (green/red). For purchasing a ready-made design, this is too specific logic (IoT statuses + escrow wallet), so it's better to assemble a custom quick UI kit based on ready atoms in Figma.
Frontend (Flutter): Native cross-platform development (iOS/Android). Smooth balance animations, WebSockets for instant leaderboard/chat updates in real-time, and integration of Push notifications (FCM) with a response time of up to 1 second.
Backend (Node.js + PostgreSQL/Redis) & IoT:
Node.js + NestJS: An ideal stack for asynchronous event processing and WebSocket connections.
IoT & Anti-fraud: We will set up telemetry reception from Wi-Fi modules, parsing acceleration vector accel_x/y/z, and event validation (static hold check).
Financial logic (Stripe Connect):
We will implement a full-fledged Escrow/Split pipeline: a run in SOLO mode (holding and charging a penalty to the platform account) and GROUP mode (holding a common pool, auto-distribution of 15% platform commission / 85% to the prize fund and automatic Payout to winners).
Our codebase and experience:
You can evaluate our work with code, complex integrations, and high-load interfaces at the following links:
Interactive web interface: https://slovakgo.sk/
Examples of clean codebase on GitHub: [github.com/kenoleeee/creatorflow](https://github.com/kenoleeee/creatorflow) and [github.com/kenoleeee/italk](https://github.com/kenoleeee/italk)
Project evaluation:
Development timeline: 25 – 35 working days (phased sprints: Figma UI/UX -> Backend & Stripe Escrow API -> Flutter app -> IoT anti-fraud -> Final testing).
Estimated budget: $1,500 – $2,200 (depending on the final number of screens and complexity of the Wi-Fi module protocol).
Ready to take the project into work. I suggest having a short 5-minute call on Google Meet to discuss the data transfer format from your IoT module and the structure of Stripe test accounts.
Budget: 15000 UAH Deadline: 14 days
The task is to build a P2P betting platform with IoT triggers, escrow logic, and automatic prize pool distribution among room participants.
Approach: Flutter + Dart for cross-platform, Figma design in dark/neon style with balance animations via Rive or Lottie. Backend on Node.js or Dart Frog with PostgreSQL, separate services for escrow logic and IoT webhooks. Stripe Connect for the global market: Transfer + Payout API for auto-split 15/85 and payouts to winners, with idempotent keys on each transaction to avoid double charges during retries.
A critical point that can be easily overlooked: when multiple IoT sensors trigger simultaneously in one room, a queue (for example, BullMQ) with a lock on the room is needed; otherwise, the prize pool may be calculated incorrectly.
What is the expected number of simultaneous active rooms and which specific IoT protocol does the sensor use (MQTT, HTTP webhook, BLE)?
Budget: 1000 UAH Deadline: 30 days
Hello! I have carefully reviewed the technical requirements for the project. The task is excellent and technologically mature: the combination of a cross-platform client, complex fintech logic (holding, escrow, splits), and integration with IoT devices in real-time is exactly the stack I work with regularly.
I am ready to take the project turnkey (Design + Client + Backend + Integration).
💡 Why me and why React Native is the best choice here:
Powerful ecosystem for IoT and background processes: Unlike Flutter, which may require more complex native bridge connections for certain types of low-level background tasks and peripheral work, React Native has a mature library base for handling network events, WebSocket/MQTT, and background synchronization, which is critically important for stable communication with your Wi-Fi sensor and delivering Push notifications via FCM in less than 1 second.
Speed of UI and animation development: A neon-tech interface in dark tones with dynamic animations for balance changes and alerts can be implemented on React Native using modern libraries (Reanimated, Gesture Handler) as smoothly and natively as possible, without excessive resource consumption during the rendering stage.
Cost savings on design without loss of quality: Considering your wish to save costs, I will prepare a quick prototype of the interface based on modern proven UI kits in a dark neon style (Dark Mode). We will adapt ready-made dark components for 4 key screens (Dashboard, Rooms, Wallet, Device), which will maintain the "techno" style and significantly reduce the time spent on the Figma stage.
Fintech architecture (Stripe Connect): I have experience working with payment gateways for the global market. We will set up the correct holding logic (Hold), transit accounts (Escrow), and automatic payment splitting (Split Payments: 15% platform fee / 85% to the room prize fund) through backend API commands.
🛠 My technology stack for your project:
Mobile part: React Native (TypeScript, Redux Toolkit / Zustand for state management, OneSignal/FCM for notifications).
Backend: Node.js (NestJS), PostgreSQL as the database with transactional integrity (critically important for finance).
IoT & Realtime: MQTT or secure WebSocket protocol for communication with the Wi-Fi sensor module, as well as anti-fraud logic verification on the server (analyzing accel_x/y/z vectors to protect against static sensor holding).
I am ready to discuss the details, agree on the development stages, and start as soon as possible. I will be waiting for your feedback!
Budget: 27000 UAH Deadline: 90 days
We can take care of everything for you: design, frontend and backend development, as well as testers needed for passing the Play Market testing. The MVP will be ready in 2 months, and the final product in 4–6 months, with a budget starting from €30,000. The team is professional and we work under a contract. We can also help with advertising and legal matters. We are located in Kyiv.
