
Closed
Posted
Paid on delivery
Kiosk Software – Simple Roulette + QR Code Generation (SDK Integration) Description: I have a vending machine with a touchscreen and a working SDK provided by the manufacturer. The machine is already fully functional. I DO NOT need to build a system from scratch. I only need to ADD a new feature to the existing interface. Objective: Add a new option/button on the screen that: 1. Opens a simple roulette (spin wheel UI) 2. User spins the wheel 3. Based on the result, the system generates and displays a QR code on the screen Important: • No need for backend (for now) • QR codes can be predefined or generated locally • No need to dispense physical products in this feature • This is a kiosk/touchscreen interface Requirements: • Experience with kiosk software / embedded systems / Android (if applicable) • Ability to work with external SDK • Clean and simple UI (nothing complex) Deliverables: • Working roulette interface • QR generation based on result • Integration with existing system using SDK Bonus (optional): • Ability to modify rewards easily in the future
Project ID: 40363781
113 proposals
Remote project
Active 1 mo ago
Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs
113 freelancers are bidding on average $1,106 USD for this job

With over a decade of experience in full-stack architecture and high-scale systems, I understand your need to add a new feature to your existing vending machine interface. The challenge of integrating a simple roulette spin wheel with QR code generation may seem straightforward, but ensuring seamless functionality within your kiosk software requires expertise in external SDK integration and user-friendly UI design. Having successfully built and scaled Telegram Mini Apps serving over 1 million users, I am well-equipped to handle the complexity of this project. One strategic insight I can offer is to leverage predefined QR codes for quick generation, optimizing the user experience. My track record in developing high-security systems, such as FinTech applications, underscores my ability to ensure the integrity and reliability of the system. I encourage you to reach out to discuss the roadmap for implementing Roulette (sdk) on your vending machine. Together, we can ensure the successful integration of the roulette interface and QR code generation, meeting your project requirements within the specified budget and timeline.
$1,200 USD in 20 days
9.1
9.1

⭐⭐⭐⭐⭐ As you seek to elevate your kiosk software with a new roulette feature and QR code generation, my team at CnELIndia is uniquely positioned to accompany you in this venture. With over nearly two decades of experience in the industry, we have honed our skills in Android, Mobile App Development, PHP, Software Architecture, and UI design - all of which are crucial to implementing your project. One of the key aspects of this project is working with an external SDK, and adapting my skills to incumbent systems smoothly. I also understand the importance of creating a clean and simple user interface that’s compatible with your existing setup. These traits were displayed in my career milestones such as partnering with diverse clients and consistently delivering projects within time & budget constraints. Moreover, one aspect that sets us apart is our capacity for further amendments. If you require easy reward modifications in the future, we guarantee post-sales support that includes regular updates and on-demand feature enhancements to keep your system always at par with changing times. Trust CnELIndia's efficiency and innovation to craft a cutting-edge digital solution for you. Let’s bring your vision to reality!
$1,125 USD in 7 days
9.0
9.0

I understand that you need to integrate a simple roulette feature with QR code generation into your existing vending machine touchscreen interface using the provided SDK. I have experience in kiosk software, embedded systems, and Android development, making me well-suited for this project. I will ensure a clean and straightforward UI design to meet your requirements. I am confident in my ability to deliver a working roulette interface with QR generation and seamless integration with the existing system. Let's discuss further to clarify any details and adjust the budget accordingly. Please review my profile for reference. Looking forward to collaborating with you.
$750 USD in 10 days
8.8
8.8

Hello, this project involves enhancing your existing vending machine interface by integrating a new interactive feature. We'll add a simple roulette spin wheel, triggering local QR code generation based on the result, seamlessly leveraging your provided SDK. I’m Waqas from Eclairios, a professional software engineer with over 7 years of experience in app and web development. I have successfully completed 128 projects, earning a 5.0 rating from satisfied clients. I specialize in mobile apps (Android, iOS, Flutter), website development, custom APIs, and backend solutions. My goal is to deliver high-quality, scalable solutions that meet your business needs. Why hire me? ★ 100+ Projects Completed with 5-star rating. ★ 3 months of free post-launch support ★ Expertise in advanced technologies and systems Let’s connect and discuss how I can help you with your project. Best regards, Waqas
$960 USD in 7 days
8.4
8.4

Hello there, I will build the spin wheel UI, integrate it into your existing kiosk interface via the manufacturer SDK, and wire up local QR code generation based on each roulette outcome. For the reward mapping, I will store prizes in a simple JSON config file — prize label, probability weight, and corresponding QR payload — so you or your team can add, remove, or adjust rewards without touching any code. The wheel segments will render dynamically from that same config, keeping the UI and logic in sync automatically. Questions: 1) What platform does the kiosk run on — Android, Windows, or Linux? 2) Does the SDK expose a specific method or event for injecting new UI screens into the existing interface? 3) Should the QR codes encode a static URL, a coupon string, or something else? Looking forward to talking through the details. Kamran
$790 USD in 13 days
8.6
8.6

I can add this feature to your existing kiosk system without rebuilding anything. With 12+ years of experience in kiosk UI development, SDK integrations, and interactive touchscreen applications, I specialize in extending existing systems cleanly and safely. What I will deliver: • Add new “Roulette” button in your current interface • Build a simple spin-wheel UI optimized for touchscreen • Map spin results to predefined outcomes • Generate and display QR code locally on-screen • Integrate directly with your existing vendor SDK (no system rewrite) Technical approach: • Lightweight UI module (Android/Web-based depending on your stack) • Local QR generation (no backend required) • Configurable reward mapping for easy future updates • Clean integration layer to avoid affecting existing machine logic Bonus: • Editable reward configuration file for quick changes Deliverables: • Fully working roulette feature integrated into your current system • QR generation module • Source code + integration notes
$1,000 USD in 15 days
8.4
8.4

⭐⭐⭐⭐⭐ Enhance Your Kiosk Software with Roulette & QR Code Feature ❇️ Hi My Friend, I hope you are doing well. I reviewed your project requirements and see you are looking for a kiosk software upgrade. You don’t need to look any further; Zohaib is here to help you! My team has successfully completed 50+ similar projects for kiosk software. I will create the roulette feature and QR code generation as per your needs, ensuring a smooth integration with your existing system. ➡️ Why Me? I can easily add the roulette and QR code feature to your kiosk as I have 5 years of experience in kiosk software development, working with embedded systems and SDK integrations. My expertise includes UI design, software integration, and user experience enhancement. I also have a strong grip on Android development and SDK usage, making me the right choice for this project. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. I look forward to discussing this with you in our chat. ➡️ Skills & Experience: ✅ Kiosk Software Development ✅ SDK Integration ✅ User Interface Design ✅ Embedded Systems ✅ Android Development ✅ QR Code Generation ✅ Software Testing ✅ User Experience Design ✅ Spin Wheel UI Creation ✅ Debugging and Troubleshooting ✅ Project Management ✅ Client Communication Waiting for your response! Best Regards, Zohaib
$900 USD in 2 days
8.0
8.0

Hello, I understand you want to add a simple roulette feature with QR code generation to your existing vending machine touchscreen using the provided SDK. I'll create a clean and easy-to-use button that opens the roulette wheel for users to spin. After the spin, the system will show a QR code that is either predefined or generated locally without needing backend support. I'll ensure smooth integration with your current setup and keep the interface straightforward so it fits well with your kiosk environment. This approach keeps the feature light and user-friendly, fulfilling your requirements effectively. To clarify, do you have specific formats or data sets planned for the QR codes that the roulette will generate? Do you have specific formats or data sets planned for the QR codes that the roulette will generate? Best regards,
$1,500 USD in 12 days
7.5
7.5

Hi, there The real challenge is fitting a new roulette and QR flow into the existing kiosk software without creating fragile behavior at the SDK or touchscreen layer, because on a kiosk even small UX or integration issues feel like system failure. This should be implemented as an isolated feature module with a simple state-driven flow: entry point, spin animation, result resolution, QR render, and clean return to the main interface. QR values can be locally mapped by reward so future changes stay lightweight and controlled. The key here is keeping the integration loosely coupled, so rewards and wheel logic can evolve later without touching the broader machine workflow. That protects reliability now and flexibility later. The first step is reviewing the SDK hooks and current UI architecture, then wiring the roulette flow in a controlled test build. This should slot into the existing system cleanly and stay easy to maintain..
$1,125 USD in 7 days
7.2
7.2

Your SDK integration will fail if the manufacturer's touchscreen driver doesn't support custom UI overlays - I've seen this break 3 kiosk deployments where developers assumed standard Android rendering would work. Quick question - does the SDK documentation specify whether you're running on Android Things, a custom Linux build, or standard Android? And what's the screen resolution and touch input protocol (capacitive vs resistive)? These constraints determine whether we use native Android views or need to render through the SDK's canvas layer. Here's the implementation path: - ANDROID SDK INTEGRATION: Build the roulette as a native Activity that hooks into the existing kiosk lifecycle, ensuring proper touch event handling and screen rotation lock to prevent user tampering. - EMBEDDED UI DESIGN: Create a lightweight spin wheel using Canvas API with physics-based deceleration (no bloated libraries), keeping APK size under 5MB to avoid slow boot times on embedded hardware. - QR CODE GENERATION: Use ZXing library to generate codes locally without network calls, encoding reward IDs that you can modify through a simple JSON config file - no recompilation needed. - SDK LIFECYCLE MANAGEMENT: Implement proper state handling so the roulette returns control to the main vending interface after QR display, preventing the machine from getting stuck in the game screen. I've built 4 kiosk interfaces for retail clients running on custom Android hardware, including one that integrated with a proprietary payment SDK similar to your setup. The biggest failure point is always assuming the SDK behaves like standard Android - it doesn't. Let's do a 15-minute call to review the SDK docs before I start coding. I need to see the manufacturer's API reference to confirm we won't hit hardware limitations.
$1,020 USD in 30 days
6.6
6.6

As an experienced and versatile developer, I am confident in my ability to integrate a roulette feature into your existing vending machine software using the provided SDK. My knowledge in embedded systems and Android will prove useful in delivering a clean and functional UI as required. My forte lies in consistently delivering complete solutions, and this project wouldn't be any different. I can ensure that the new feature is seamlessly integrated into your existing system with a working roulette interface that displays QR codes generated based on the user's spin result. In addition to meeting your primary requirements, I also have the capability to build in an optional bonus feature for future rewards modification that would be easily managed. My dedication towards system architecture design, combined with my backend skills ensures that not only will this system work efficiently but it will be secure and maintainable as well. Let’s join forces and produce a fantastic customer experience for your vending machine users!
$750 USD in 1 day
6.3
6.3

Hi there!!! ★★★★ (Client needs to add a roulette feature and QR code generation to a vending machine’s touchscreen interface.) ★★★★ I understand that you need a simple roulette spin wheel feature integrated into your existing vending machine interface, along with QR code generation based on the result. Here’s how I can help: ⚜ Implement roulette feature with a simple, intuitive spin wheel UI ⚜ Generate QR codes based on the roulette result ⚜ Integrate smoothly with the existing system using the provided SDK ⚜ Create a clean and easy-to-use interface ⚜ Ensure no backend is required for this feature (local QR code generation) With experience in kiosk software and embedded systems, I’m confident I can deliver this feature with ease. Let’s connect to discuss how we can get this up and running! Warm Regards, Farhin B.
$756 USD in 10 days
6.7
6.7

Hello I understood the requirement and can complete this project in 3 days. We can have detailed discussion over chat. Payment will be done only after successful completion of work. No upfront. Thanks
$1,125 USD in 7 days
5.9
5.9

Greetings, I see that you want to enhance your vending machine's user experience by adding a roulette feature, along with QR code generation. This sounds like a fun addition! My approach would involve integrating a simple roulette wheel into your existing touchscreen interface, allowing users to spin and receive a QR code based on the outcome. Since you already have a working SDK, I’d ensure the integration is smooth and aligns with your current setup. With my background in kiosk software and UI design, I can create a clean and straightforward interface that will be easy for users to navigate. I also understand the importance of keeping it simple, especially since there's no need for a backend at this stage. One question I have is how you envision the QR codes being used—will they be linked to specific rewards or offers?
$1,300 USD in 10 days
5.4
5.4

As an experienced web and app developer, I've worked extensively on creating clean and simple user interfaces customized to various platforms including kiosk software and embedded systems. My familiarity with Android applications, if applicable, would add an extra edge to the project. Having worked with external SDKs frequently in my 8-year career, I'm confident in integrating the provided SDK to build a flawless roulette feature for your vending machine. With performance and user experience as my top priorities, I assure you of a working, efficient roulette interface that generates QR codes based on the result. Following your requirements, this project does not require backend development for now, but I'll definitely ensure easy scalability and maintenance of the rewards system once required. I believe my technical expertise coupled with strong time-management skills will enable me to deliver what you need in a timely manner. As my client, you can expect clear communication throughout the project and a durable digital solution at its completion. Let’s jump into detailed discussions in the chat to move forward collaboratively!
$750 USD in 10 days
5.6
5.6

Hi, I have strong experience in Android, kiosk/touchscreen interfaces, SDK integrations, and building lightweight UI features for embedded systems. I can add this feature cleanly into your existing system by creating a smooth roulette spin interface, mapping results to QR outputs generated locally, and integrating it through your SDK so it behaves like a native part of the current kiosk flow. You can expect clear communication, fast turnaround, and a high-quality result that fits seamlessly into your existing workflow. Best regards, Juan
$750 USD in 3 days
5.4
5.4

Hello, I am Vishal Maharaj, with 20 years of experience in PHP, Software Architecture, Android, User Interface / IA, and Mobile App Development. I have carefully reviewed your project requirements and am confident in implementing the Roulette feature on your kiosk software using the provided SDK. To achieve this, I will seamlessly integrate a new option/button on the existing interface, allowing users to spin a roulette wheel and generating QR codes based on the result. I will ensure a clean and simple UI design, focusing on kiosk software and embedded systems expertise, along with proficiency in working with external SDKs. I am eager to discuss the project further and provide a detailed solution tailored to your needs. Please initiate the chat to get started. Cheers, Vishal Maharaj
$1,000 USD in 10 days
5.1
5.1

Hi, As an accomplished software engineer with a focus on mobile app development, including Android, I’m well-suited for implementing your roulette feature within the existing system. My versatile experience includes working on embedded systems, kiosks, and touchscreen interfaces, aligning perfectly with your requirements. Across my 15+ year career, I’ve solved numerous challenges similar to yours, emphasizing optimizing current platforms rather than starting from scratch. Notably, I’m also a talented UI designer ensuring clean and simple interfaces without compromising functionality. This aligns hand-in-hand with your project needs. Additionally, while you've mentioned no immediate need for backend work or dispensing physical products, should your future plans change I can extend my skillset to cater to that scope too. Throughout my career, I've worked diligently with external SDKs allowing me to swiftly integrate them into new systems. My skill set extends beyond the immediate functional implementations such as roulette and QR code generation, focusing on maintaining overall system stability while adding new features. Customer satisfaction is my top priority and I ensure my work delivers on your specific needs. When you choose me for the project, you're opting for proactive problem-solving, efficient coding¬¬¬¬¬¬ , and reliability. Looking forward to discussing this project further with you!
$1,125 USD in 7 days
4.9
4.9

✋ Hi There!!! ✋ The Goal of the project:- Integrate a simple roulette spin feature into your kiosk system that generates and displays QR codes based on user results. I have carefully reviewed your requirement to extend the existing kiosk software using the provided SDK, adding a roulette UI and local QR generation without backend dependency, and I clearly understand the need for smooth integration without disrupting current functionality. I am the best fit because I have solid experience working with embedded systems, Android interfaces, and SDK-based integrations. • Develop a clean and responsive roulette spin UI optimized for touchscreen kiosk interaction • Implement QR code generation logic based on spin results with flexible reward mapping • Integrate seamlessly with your existing system using SDK while maintaining stability I will also handle UI design, database management, testing, and full source code delivery with clear documentation. I have 9+ years experience as a full stack developer and have built similar kiosk and touchscreen-based interactive features. Looking forward to chat with you for make a deal Best Regards Elisha Mariam!
$751 USD in 7 days
5.0
5.0

Greetings! I looked at your kiosk software project. You need to add a roulette feature to an existing vending machine interface — spin wheel, then generate and display a QR code based on the result. I provide kiosk software development and SDK integration services. I will add a button to your current screen, build a simple spin wheel UI, and connect it to QR generation using your SDK. No backend needed. Clean and touch-friendly. Send me the SDK documentation and access to your current interface. Thanks, Revival
$750 USD in 14 days
4.8
4.8

Benito Juarez, Mexico
Member since Apr 11, 2026
₹12500-37500 INR
$250-750 CAD
₹12500-37500 INR
₹600-1500 INR
₹75000-150000 INR
₹150000-250000 INR
₹10000-15000 INR
₹37500-75000 INR
₹500 INR
$250-750 AUD
₹12500-37500 INR
$10-30 USD
₹1500-12500 INR
£20-250 GBP
₹1500-12500 INR
$250-750 USD
min €36 EUR / hour
min €36 EUR / hour
₹1000 INR
₹1500-12500 INR