Contact person: Business Client

Phone:Show

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Location: Izmir, Turkey

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"Freelancer Job Posting – Blockchain-Based Recycling Reward System
Project Title:

Blockchain-Based Recycling Reward Application (Mobile App + Backend + Token Development)

Project Description

I am building a startup focused on environmental sustainability.
The goal is to create a mobile application that rewards users with a crypto token whenever they recycle bottles using supermarket “Reverse Vending Machines” (RVM) commonly used in Europe.

After returning bottles, the RVM provides a QR code.
The user scans this QR code inside the mobile app and instantly receives tokens in their in-app wallet.

These tokens can later be used in an eco-friendly marketplace inside the app.

I am looking for an experienced developer or team to build the complete system (mobile app, backend, smart contracts, and basic UI/UX).

Project Scope (What You Need to Build)
1. Mobile App (iOS + Android)

User registration / login

In-app crypto wallet creation

QR code scanner

Token balance + transaction history

Reward claim system

Marketplace section

User profile

Multi-language support (EN + optionally TR)

Clean and minimal UI/UX

(Preferred tech: React Native or Flutter)

2. Backend / API Development

Authentication & user management

QR code validation logic

Communication with RVM API (mock API is fine for MVP)

Token reward processing

Admin dashboard (send rewards, view users, view logs)

Secure and scalable architecture

(Preferred tech: Node.js / Python / Go, Firebase/AWS)

3. Blockchain / Smart Contract

Create a utility token (ERC-20 on Polygon or similar chain)

Implement reward distribution logic

Wallet integration (WalletConnect or custom in-app wallet)

Gas-optimized smart contract design

Basic security checks

(Tokens will be used only inside the platform for now.)

4. UI/UX Design

Simple and modern eco-friendly theme

12–15 screens designed in Figma

Responsive layout

Smooth user flow (scan → reward → marketplace)

Required Skills

Strong experience in React Native or Flutter

Backend development (Node.js, Python or Go)

Experience with Solidity or similar smart contract languages

Understanding of Web3 authentication and wallets

UI/UX design capability (or ability to work with a designer)

Knowledge of security best practices

Deliverables

Fully functional mobile app (Android/iOS)

Backend (API + database + admin panel)

Smart contract deployment

Figma design files

Source code + deployment documentation

1–2 months post-launch support (negotiable)

Budget & Payment

Flexible depending on experience.
Payment milestones will be structured as follows:

UI/UX completion

Backend + Blockchain integration

Final delivery, testing, and deployment

To Apply, Please Provide:

Portfolio or links to previous mobile apps

Any Web3/crypto project references (very important)

Proposed tech stack

Estimated timeline

Fixed price or hourly rate

Any questions you have about the project" (client-provided description)