It is necessary to develop the backend for the website.
178 USD Need to develop the backend for the website, the frontend has already been done in Lovable.dev.
Functionality:
License system
What should work:
I create (or issue after payment) a license key to the user.
The user activates the license on the site.
The license is tied to the user's device upon first activation.
Reusing the license on another device should be impossible.
All details in private messages.
-
5 days178 USD
5 days178 USD
Hello, Oleksandr! 👋
I have reviewed your task and clearly understand the need for a backend for the licensing system, as the frontend is already ready at Lovable.dev. It is necessary for the license keys to be created/issued, users to be able to activate them on the site, and upon first activation, the key should be tied to the device, making reuse on another device impossible — I can implement this.
I have experience in developing backends and implementing licensing and activation systems, so I will quickly understand the existing frontend of Lovable.dev and connect the necessary endpoints and logic for checking/tethering licenses.
I am ready to discuss the details of device tethering (what data will be used for identification) and the method of issuing keys (manual generation or after payment) in private messages.
I would be happy to discuss the project details and answer your questions. ✅
…
🌐 Portfolio with recent cases:
https://mrnko.com
💼 Freelancehunt profile:
Freelancehunt
🤝 I would be glad to discuss the project details, answer your questions, and offer the best solution to achieve the desired result.
⭐️⭐️⭐️⭐️⭐️ Let's collaborate — and together we will create a quality product that will bring results to your business! 🚀✨ I am ready to start working as soon as possible.
-
7 days178 USD
7 days178 USD
Hello. My name is Volodymyr.
I am an experienced developer with 8 years of experience in creating turnkey websites, mobile applications, and complex web systems.
I specialize in developing modern, responsive, and high-performance solutions. Over 8 years of practice, I have built a deep technical stack:
Frontend and interfaces: HTML, CSS, JavaScript, TypeScript, React.js, Next.js, Vite, Tailwind CSS, Bootstrap, and Elementor.
Mobile development: React Native and Flutter.
… Backend and API: Node.js, PHP, Python, Laravel, REST API, and GraphQL.
Databases and caching: MySQL, MariaDB, PostgreSQL, MongoDB, and Redis.
Infrastructure and tools: Git, Docker, Nginx, Apache, Composer, and Linux (Terminal).
I effectively analyze client requirements, propose optimal architectural solutions, and strictly adhere to deadlines. In addition to development, I possess skills in design, technical SEO optimization, and project support.
-
7 days178 USD
7 days178 USD
Good day, Oleksandr!
Your task of developing the backend for the website looks interesting. I understand that the frontend is already ready, and a licensing system needs to be implemented for user activation.
Your project has specific functional requirements. I have experience in developing similar systems, which allows me to handle the task effectively. I understand the importance of license security and device binding.
Examples of my work:
- Website for selling luxury cars - https://freelancehunt.com/showcase/work/sayt-dlya-prodazhu-laksheri-avto/1993140.html
- Website for a digital marketing company - https://freelancehunt.com/showcase/work/sayt-digital-marketingovoyi-kompaniyi/1993142.html
… - Car rental website in Kyiv and Lviv - https://freelancehunt.com/showcase/work/sayt-orendi-avtomobiliv-kievi-ta/1993137.html
To better understand your vision and goals, please clarify:
- What are the planned timelines for the launch?
- What structure of the licensing system do you need?
- Do you have a detailed technical specification?
- What technologies do you plan to use for integration?
The cost of the project will depend on several factors:
1. The complexity of the licensing system.
2. The availability of a detailed technical specification.
3. Whether a unique design is needed or if it will be a ready-made template.
At the start, it is important to agree on the final vision of the project so that we can create an effective system that meets your requirements.
I suggest discussing the details in private correspondence or at a meeting.
-
6 days178 USD
6 days178 USD
Good day! The backend for the licensing system is exactly our profile: I write in Python (FastAPI) + licensing database, I have ready live demos where key issuance, activation, and binding are implemented.
Here’s how I see it for your task:
- API + key database: generation/issuance of keys, activation on the site, statuses (active/revoked).
- Device binding through an activation token, rather than through an unstable browser fingerprint — this way, reactivation on another device is reliably blocked.
- Admin issuance of keys and activation log, plus managed device reset by the admin (in case the client has actually changed computers).
- Connection to your frontend with Lovable.dev.
Two clarifications to provide an accurate plan right away:
… - Is the key created only manually, or should the license be generated automatically after payment?
- Is the transfer of the key to a new device completely blocked, or is manual reset by the admin allowed?
I accept your budget of 8000 UAH, approximately 6 days. I am currently gathering my first reviews on Freelancehunt, so I focus on quality and deliver results. I can send a live demo so you can see the activation flow before making a decision.
Petro Pankov, BotCraft Group
-
10 days401 USD
10 days401 USD
I can take the backend under a license. 8,000 UAH seems to be enough only for a very simple version without proper protection and scalability. I would recommend doing a minimal working stage starting from 18,000 UAH - API, license database, activation, device binding, prohibition of reactivation, admin key issuance.
> Look, there’s a nuance here - device binding needs to be done carefully because browser fingerprints are unstable. It’s better to include an activation token, limits, an event log, and managed device reset by the administrator.
> We will need access to the frontend of Lovable.dev, a description of the current payment scenario or manual key issuance, and clarify where exactly the user should enter the key.
Questions
> Is the key issued only manually or should a license also be automatically created after payment?
> Should one key work only on one device forever, or is manual transfer to a new device needed?
… Similar experience
> https://business.ingello.com/vorfahr - automation and complex server logic around processes
> https://business.ingello.com/fractal - systems with agents, scenarios, and access management
> https://business.ingello.com/forma-crm - corporate logic, roles, admin processes, and accounting
Main page of Ingello for the exchange https://systems-fl.ingello.com/ua
In summary, I can create not just a key check, but a normal scheme that won’t need to be rewritten at the first growth. Well, yes, it sounds a bit harsh, but a miser pays twice =)
-
7 days178 USD
7 days178 USD
a similar project — a license activation system for a SaaS platform where we implemented device binding + protection against reuse, 500+ active licenses without any hacks.
Do you need the ability to transfer the license to another device (for example, if the user changed computers), or should this be completely blocked?
I suggest we get in touch; I will provide you with free technical consultation and we will create a development plan + I will tell you about my team!
-
5 days178 USD
628 28 0 1 5 days178 USD
Good day! I have experience in software protection. I will create the backend for the website and check the entire system for resilience if needed.
-
30 days178 USD
612 21 0 30 days178 USD
Hello. I can do your project. I have experience. Write to me and we will agree.
-
3 days178 USD
3092 11 0 3 days178 USD
Good day! I am ready to quickly create a backend in Python. Please send detailed information via private messages.
-
8 days178 USD
14762 218 0 8 days178 USD
Good day! I can implement it on Laravel. I will also create a convenient admin panel if needed. Contact me, and we will discuss all the details.
-
5 days223 USD
1762 19 0 1 5 days223 USD
Hello.
We can implement the backend for the licensing system and integrate it with the already prepared frontend. In such tasks, it is important to correctly build the logic of activation, device binding, re-verification of the license, and protection against transferring the key to another device.
We have experience with similar logic for products on Windows, where the license was tied to a set of device characteristics: system data, time zone, PC username, IP, and partially unique file or environmental characteristics. This approach helps reduce the risk of bypassing by simply changing one parameter.
For your case, we can implement a backend that generates or accepts license keys, stores the license status, records the first activation, creates a device fingerprint, and subsequently allows operation only from this device. It is also worth immediately considering administrative logic: manual key creation, deactivation, reissuance, viewing activated devices, and a log of activation attempts.
It is important to clarify what exactly is considered a "device" in your product, as the fingerprint logic will differ for a website, desktop application, and browser access. If it is indeed a website, the binding will be weaker than in a Windows application, so it is better to combine device fingerprinting, session, user-agent, IP risks, and server-side license verification.
…
The estimated time for implementing the basic backend is 5-10 working days. If an admin panel is needed for managing keys, logs, devices, and manual reset of activations, the timeline may be closer to 10-15 working days.
For an accurate estimate, we need to understand whether this licensing is only for access to the website or an external product, how the user authenticates, whether payment is required before issuing the key, and what technologies are currently being used.
-
7 days178 USD
624 13 3 7 days178 USD
Hello. The task is generally clear and needs to be implemented. I would also like to review the layout to understand the structure and discuss the details with you in private correspondence. I suggest implementing it using PHP and MySQL database. I can start working on it today. I will provide more details on the deadlines after reviewing the layout and the detailed specifications. Feel free to reach out!
-
8 days178 USD
716 4 0 8 days178 USD
Ready to develop a reliable backend for a licensing system with consideration for future scalability and secure operation of the service. In your case, the key task is not just to create a database for storing keys, but to build a full-fledged access control system that will correctly handle license issuance, user activation, and protection against reuse on other devices.
Before starting development, I will thoroughly analyze the logic of the frontend created in Lovable.dev to ensure stable integration between the user interface and the server side. I will pay special attention to the structure of the API, system performance, and secure storage of licensing data. As a result, the user will receive a simple activation mechanism, while the service owner will have a convenient tool for managing licenses.
The system will be implemented in such a way that the license key can be created manually or automatically after payment. During the first activation, the license will be tied to a specific device, after which reuse on other hardware will be blocked according to defined rules. Additionally, mechanisms for deactivation, license status checking, and administration through a separate control panel can be provided.
In my work, I emphasize the quality of architecture, security, and clarity for future project support. You will receive not a temporary solution, but a stable backend ready for real use and further functional development without the need for a complete rewrite of the system in the future.
Work plan:
…
List of stages:
1. Analysis of requirements and logic of the frontend.
2. Designing the architecture of the backend system.
3. Development of a database for licenses and users.
4. Creation of an API for generating and activating licenses.
5. Implementation of license binding to the device.
6. Configuration of license validity checks.
7. Implementation of protection against reactivation on other devices.
8. Integration of the backend with the ready frontend.
9. Testing of use cases and security.
10. Deployment and handover of the finished solution.
-
5 days178 USD
601 24 0 5 days178 USD
Hello.
I would like a bit more detail about what the project is related to and what is meant by the device. Also, how do you envision the activation procedure.
Stack: PHP/Laravel
The price and timelines are approximate.
-
4 days178 USD
9927 117 0 4 days178 USD
Hello.
I am a NodeJS developer. I can develop the backend for your frontend. Write to me, and we will discuss.
-
5 days178 USD
9501 28 0 1 5 days178 USD
Hello!
I am ready to implement the backend for a licensing system that ties the key to the user's device. I will foresee the generation and management of licenses, activation via API, key validity checks, and protection against reuse on other devices.
I have worked with Python, REST API, authorization and licensing systems, so I can offer a reliable and scalable solution that easily integrates with the existing frontend on Lovable.dev. I would be happy to discuss the implementation details in private messages.
-
4 days178 USD
241 4 days178 USD
Hello, Alexander! I studied your task for developing the backend for the licensing system with great interest. The task is completely clear.
I am ready to implement a reliable, secure API for integration with your frontend on Lovable.dev. My colleagues in the bids are absolutely right: standard browser fingerprints are unstable. Here’s how I will implement this project to ensure robust protection and that users do not suffer: Device binding logic: I will write the backend in Python (FastAPI) or Node.js, which will generate a unique encrypted token based on a device fingerprint (a combination of User-Agent, resolution, and Canvas/WebGL hash) upon the first activation of the key. If a request is made from another device, the system will instantly return a 403 error.
User-friendly admin panel: I will create a key management log for you, where you can generate new licenses, see statuses (active/blocked), and most importantly — have a manual unbinding function. This is critically important if your actual buyer simply changes computers or upgrades their system.
Simple integration with Lovable.dev: I will prepare automatic interactive API documentation (Swagger), CORS will be perfectly configured for your frontend domain, so the connection will take minimal time.
I fully agree to your budget of 8000 UAH, the price is absolutely reasonable for this volume. Message me privately, and we will discuss whether automatic key issuance after payment is needed, and I will immediately start writing the architecture.
-
3 days178 USD
764 5 1 3 days178 USD
Hello, my main specialty is backend. I can do everything in the shortest time and with high quality. Feel free to write =)
-
7 days178 USD
873 15 0 7 days178 USD
Good day! I have experience in backend development for web applications, including authorization, licensing, and working with payment scenarios. I implement a system for issuing, activating, and binding licenses to devices according to your requirements. I am ready to discuss the details in private messages.
-
1 day201 USD
11596 44 0 1 day201 USD
Hello, I have extensive experience in this. We can discuss the details. I will be happy to help you!
-
6 days178 USD
2582 41 0 6 days178 USD
Hello, interesting task
I can complete it for you without any problems, I have over 6 years of experience in development
If you're interested, write to me personally.
-
5 days178 USD
224 1 0 5 days178 USD
Hello! I will develop the backend in Python using Flask or Django, depending on the project requirements. For the licensing system, I will use my own mechanism for generating keys and verifying their validity.
I will integrate the licensing system with the frontend on Lovable.dev via RESTful API. The license will be tied to the user's device by analyzing the user agent and storing the relevant information in the database.
-
3 days178 USD
1310 6 0 3 days178 USD
Hello!!!
I will write in Node.js, I work quickly and perfectly. I have reviews and skills as well.
Feel free to contact me.
-
5 days178 USD
4975 41 4 1 5 days178 USD
Good day!
I professionally develop bots in Telegram and web applications in Python. I am ready to implement a reliable and secure backend for your licensing system based on FastAPI.
I will deploy the project on the server.
Message me privately, and we will clarify the details.
-
4 days178 USD
11994 32 0 3 4 days178 USD
Good day! I develop in Python, have worked on similar projects with React/Node.js, and am ready for collaboration.
-
14 days178 USD
1195 4 0 14 days178 USD
Hello!
I will develop the backend for your website with a ready frontend on Lovable.dev, implementing a licensing system, key generation and activation, device binding upon first use, and protection against reactivation on another device. For such functionality, it is important to correctly build the logic for verification, store the device fingerprint, ensure license security, and provide convenient key administration from the start.
We have experience in developing backend systems and business logic on Laravel, so we can implement this reliably, without unnecessary overload, and with the possibility of further expanding functionality. Please message me privately on the platform, and we will discuss the implementation, service costs, rates, and deadlines in more detail.
-
3 days178 USD
727 6 0 3 days178 USD
Hello, I have developed more than one similar system for licenses, I can implement it.
-
3 days178 USD
2677 39 0 3 days178 USD
Good day! I have reviewed the task and am ready to start.
Experience:
• 4 years in Frontend and Backend development
• 2 years of commercial experience in product and blockchain
• Working with production code and real financial scenarios
Some of my projects:
… https://contentbuilder.ai/ - a commercial project from the USA, where I worked as a full-stack developer and implemented most of the functionality
https://freelancehunt.com/showcase/work/procasino/2025898.html
https://freelancehunt.com/showcase/work/bionrgg/2025897.html
-
3 days178 USD
738 4 0 3 days178 USD
Good day. I can develop the backend in Go lang. I have worked on a similar project. Everything will work very quickly, reliably, and securely! Write to me, and we will discuss.
-
7 days334 USD
96232 1273 1 10 7 days334 USD
Hello. I have been working with Node.js for over 9 years. I am ready to complete the task.
-
3 days223 USD
3082 9 0 3 days223 USD
Good day!
I will do everything without any problems.
I can work with Node.js + PostgreSQL: issuing keys, activation with device ID tracking, blocking reuse. I can easily connect to the ready Lovable frontend.
GitHub: https://github.com/axbuglak
Examples:
https://rstays.com
… https://momicro.com
Message me privately, and we will discuss the details.
Best regards, Oleksiy Buglak
-
5 days178 USD
12912 67 0 5 days178 USD
Hello! I will complete your task quickly and efficiently.
My recent works
https://indexfast.pp.ua - fast website indexing
https://mono-bank.pp.ua - everything about Monobank
https://mamamia.pp.ua - online store
https://programist.pp.ua/ua/portfolio/ - portfolio of works
https://monitortest.pp.ua - monitor testing
https://keytest.pp.ua - keyboard testing
… https://pctest.pp.ua - computer testing
https://vseetut.matviy.pp.ua - layout
My portfolio: https://freelancehunt.com/ua/freelancer/romas6ka.html#portfolio
Message me, I will start working today. I will be glad to collaborate with you!
-
1 day178 USD
706 3 1 1 day178 USD
Hello! What should the backend be built on? I can quickly and efficiently write the backend for you.
-
2 days178 USD
229 2 days178 USD
Building a portfolio - working below market rates
Estimated cost: 75-100 USD
Deadline: 2-3 days
I will provide the exact price and deadlines after clarifying the details.
Contact me!
-
1 day178 USD
654 2 0 1 day178 USD
I have about 3 years of commercial experience in full-stack development and can easily implement the backend for your licensing system. Since the frontend in Lovable is already ready, the development on my side will take only 1–2 days.
Briefly on the implementation:
Device binding: Since this is a web platform, I will implement a reliable digital fingerprinting of the device. Upon the first activation, the key will be permanently linked to this hash in the database — it will not be possible to restart it on another hardware or in another browser.
Generation and API: I will write a clean and secure API (in Node.js or Python/FastAPI) with endpoints for creating the key, its activation, and regular validity checks. I will prepare the documentation to make it as easy as possible to connect to your frontend in Lovable.
Regarding the cost:
… A budget of 8000 UAH suits me completely; the price is absolutely reasonable for this amount of work. I will not invent any additional payments on top.
-
1 day178 USD
3367 148 4 1 1 day178 USD
Good day.\nI want to create a module.\nI have already developed a ready licensing system. I have the code ready.\nIf you have any questions, you can write to me in private messages.
-
7 days178 USD
4611 52 1 7 days178 USD
Hello! I have extensive experience in developing backend systems in Python using FastAPI, and I am ready to help you implement a license management system. I have already worked with architectural patterns such as Repository and Service Layer, which will ensure the reliability and scalability of your project. Your task of binding keys to specific devices (Hardware ID) can be easily solved through validation logic in the database. I have previously set up integrations with PostgreSQL databases and automated similar processes. I would be happy to help integrate this system with your frontend from Lovable.dev. I am ready to discuss all technical details in private messages to find the best solution for your service. I look forward to collaborating and await the project details!
-
7 days178 USD
6590 56 1 2 7 days178 USD
Good day, I am ready to perform. Experience over 10 years. Write to me privately.
-
8 days178 USD
462 1 1 8 days178 USD
Hello! Portfolio:
Freelancehunt I am ready to develop the backend for your website with the implementation of a licensing system. I can implement: - creation and issuance of license keys (manually or after payment) - activation of the license by the user on the site - binding the license to the device upon first activation - protection against reuse on other devices API for interaction with your frontend (Lovable.dev) I will create the architecture with security in mind (token-based access, device fingerprint verification, protection against request tampering). The stack I can use: Python (FastAPI / Django) + PostgreSQL / SQLite (if needed). I am ready to discuss the details in private messages.
-
4 days178 USD
11626 68 0 4 days178 USD
Good afternoon
I am ready to discuss the details in private messages
-------------------------------
-
7 days401 USD
196 7 days401 USD
We have almost a ready foundation for such a licensed backend, which can be quickly adapted to your site and launch the first working version. We can discuss it here on the marketplace; I am available (:
The timeline estimate is 5-7 days for the basic version with keys, activation, device binding, license status checking, and a simple admin part.
Regarding the budget, I would say starting from 18,000 UAH, because it is important not just to store the key in the database, but to properly implement protection against reactivation and a clear logic for checks.
We have experience in systems with access, roles, payments, and business process automation.
Similar logic cases - https://business.ingello.com/forma-crm - a system with roles, access, and business logic.
Another relevant example - https://business.ingello.com/vorfahr - automation with more complex server logic and checks.
The main page of Ingello for the marketplace - https://systems-fl.ingello.com/ua
… I would do it this way - a separate API for activation, a license database, a hashed device fingerprint, key statuses, an activation attempt log, and protection against simple bypassing.
If the key needs to be issued automatically after payment, then we will add a callback from the payment system and license generation after payment confirmation.
From you, we need access to the frontend Lovable.dev or API description, desired hosting, payment system if already chosen, and what exactly we consider a device for binding.
I would like to clarify 2 points.
Is a separate admin panel needed for creating and blocking keys, or is a technical panel sufficient for you?
Should the license be one-time, for a certain period, or with a subscription renewal?
Overall, it's fine; we can keep it simple at the first stage, but it's better to lay down the protection carefully because a penny-wise pays twice (:.
-
7 days178 USD
2847 63 5 7 days178 USD
Hello! I can transfer the layout from Lovable to Laravel, feel free to contact me.
-
5 days178 USD
1510 10 0 5 days178 USD
Good day! We have experience in creating key validation systems and integrating with existing frontend solutions. We implement this through a secure API on Node.js or Python with a database for storing and checking license status. We will provide a reliable mechanism for generating and activating keys that will perfectly complement your interface.
-
5 days178 USD
172 5 days178 USD
I am a NodeJS developer. I am ready to take on this task. Write to me, we will discuss.
-
3 days178 USD
4797 162 1 1 3 days178 USD
Good day! I can implement it on Laravel, with an admin panel and everything necessary. I would be happy to collaborate — feel free to reach out!
-
5 days178 USD
6589 28 0 5 days178 USD
Need a backend that issues license keys, binds them to a specific device upon first activation, and blocks reuse on another device.
I will do it on FastAPI + PostgreSQL: the activation endpoint accepts the key and device fingerprint, records the fingerprint to the key on the first request, and compares it on subsequent requests, returning a 403 if it does not match. An admin endpoint for generating keys with or without TTL. The key point here: the fingerprint needs to be collected consistently on the front end (User-Agent + canvas/WebGL hash), otherwise the same device may fail the check after a browser update.
Deployment on Railway or Render, CORS configured for the Lovable front domain, documentation automatically via Swagger.
What method do you currently plan to use for accepting payments and issuing keys: manually, or is integration with a payment gateway (LiqPay, Stripe, etc.) needed?
-
Ask your question to the client
Kyiv