It is necessary to develop the backend for the website.

Budget: 8000 UAH Deadline: 2 days

Hello! I understand the task: it is necessary to implement the backend for a licensing system where you create keys, and the user activates them on the site linked to one device. I will develop an API for generating license keys, their activation, and validation. I will implement the logic for binding to a unique device identifier (for example, fingerprint or MAC/IP), with checks for reuse. I will use secure storage of keys in the database (PostgreSQL or MySQL) and token authorization. I will connect to your frontend via REST API. I am ready to discuss the details in private messages on this platform.

Budget: 8000 UAH Deadline: 7 days

Good day!

I can implement the backend for your project. If the frontend is already ready in Lovable, I will connect it to the API and implement all the licensing logic.

What will be implemented:
* Generation and issuance of license keys.
* License activation through the website.
* Binding the license to the device upon first activation (device fingerprint).
* License verification via API.
* Blocking reactivation on another device.
* Admin panel or API for managing licenses.
* License statuses (active, blocked, used, expired).
* Logging of activations and verifications.
* Protection against reuse of keys.

Technologies:
* Node.js (Express or NestJS)
* PostgreSQL
* JWT/API Key authorization
* REST API for integration with the ready frontend

For an accurate estimate, we need to clarify:
* How exactly to identify the device (browser, PC, application, etc.).
* Whether there is a need for the ability to reset device binding.
* Whether there are different types of licenses (monthly, lifetime, number of activations).
* Whether integration with payment for automatic key issuance is needed.

Typically, such a backend usually takes 3–7 days depending on the implementation details and level of protection. Expand

Budget: 8000 UAH Deadline: 7 days

Olexandr, I can quickly assemble a backend for your website with a reliable licensing system: key generation, activation after payment, binding to the first device, and blocking reuse on another. I work with Python backend and databases, so I will immediately implement checks, security, and convenient admin logic. I have experience in developing server logic for websites and automation. I am ready to discuss the details in private messages.

Budget: 8000 UAH Deadline: 5 days

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. Expand

Budget: 8000 UAH Deadline: 7 days

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!

Budget: 8000 UAH Deadline: 4 days

Hello.

I am a NodeJS developer. I can develop the backend for your frontend. Write to me, and we will discuss.

Budget: 8000 UAH Deadline: 7 days

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. Expand

Budget: 8000 UAH Deadline: 4 days

Good day! I develop in Python, have worked on similar projects with React/Node.js, and am ready for collaboration.

Budget: 8000 UAH Deadline: 3 days

Hello, I have developed more than one similar system for licenses, I can implement it.

Budget: 8000 UAH Deadline: 7 days

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. Expand

Budget: 8000 UAH Deadline: 6 days

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 Expand

Budget: 8000 UAH Deadline: 8 days

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.

Budget: 18000 UAH Deadline: 10 days

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 =) Expand

Budget: 8000 UAH Deadline: 7 days

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!

Budget: 9000 UAH Deadline: 1 day

Hello!

The task is clear — FastAPI backend with a license key system: generation, activation, device binding upon first activation, and blocking reuse on another device.

For device binding, I will use fingerprinting (a combination of browser/device characteristics) — this is more reliable than just IP. I will create the API for the already prepared frontend on Lovable.dev.

We will discuss the details and exact price in private — I want to clarify whether payment is needed after the key is issued (integration with the payment system) or if you issue the keys manually.

I hope for cooperation!

Budget: 8000 UAH Deadline: 3 days

Hello!

I will create the backend for the licensing system for your ready front end on Lovable. The task is clear, backend + API is my specialty.

How I will implement it:

- Key generation and issuance — I create a license key (or issue it automatically after payment);
- Activation on the site — the user enters the key, the backend checks and activates it;
- Device binding on first activation — through device fingerprint (FingerprintJS / unique ID), the key "remembers" the device;
- Blocking of reuse — when attempting to activate the same key on another device, the backend denies it;
- All through the API, which your front end will connect to.

I want to be honest about one point, so expectations align: device binding on the web is done through fingerprint — for standard license protection, this works excellently and cuts off 99% of resale/sharing cases. However, it is not absolute (like hardware binding in desktop software) in the browser — an experienced user can theoretically change the fingerprint. For standard protection, this is more than sufficient; I just want to clarify this in advance.

Lovable usually generates the front end on React + Supabase — let me clarify: are we creating a separate backend or building the licensing logic on your Supabase (which is already connected)? I will suggest the optimal option. I would be happy to discuss the details in private. Expand

Budget: 8000 UAH Deadline: 1 day

I create cool landing pages and websites, web applications, online stores. My latest works:
https://thebeautys.nl/
https://soulscapeapp.online/
https://medtech.mlko.online/
https://beautyinside.beauty/
https://dgtlaesthetics.com/
https://richesse.in.ua/

Budget: 10000 UAH Deadline: 7 days

Hello! I have been developing backend on FastAPI + PostgreSQL for over 4 years, implementing similar logic - key generation, activation, binding to device fingerprint, blocking reuse.

I am ready to discuss the details in private messages: deadlines, stack, integration with your frontend.

Budget: 8000 UAH Deadline: 1 day

Good day, Oleksandr!
Overall, the task is clear, but to provide an accurate response regarding the deadlines and price, I would like to clarify some questions that arose after analyzing your task.
Please write in private messages – we will discuss the details and your wishes.

Budget: 8000 UAH Deadline: 5 days

Hello! I am Volodymyr, a Python developer. The task of developing the backend for the licensing system for the ready frontend Lovable.dev fully matches my engineering profile. I specialize in creating secure architectures and integrating external clients with server logic, so I am ready to implement a reliable mechanism for generating, activating, and validating access keys.

I will implement the technical part in Python using the modern FastAPI framework, which will ensure instant and stable interaction between your website and the database. Upon the first activation of the license key, the backend will obtain a unique digital fingerprint of the user's device and tightly bind it to the corresponding record in the PostgreSQL relational database. Any subsequent attempts to authorize or validate this same key from unknown hardware or another IP address will be automatically rejected by security algorithms, completely preventing unauthorized transfer of licenses to third parties.

I have significant practical experience in building similar protection and access management mechanisms. While developing the standalone PAYBACK CARTEL system, I successfully configured complex transactional logic and subscription control, where session security and preventing access duplication were critically important tasks. All written code will be deployed directly on your server, and all necessary API routes will be clearly documented for seamless frontend integration.

You can familiarize yourself in detail with my engineering approach and view examples of implemented solutions in my portfolio at the link Freelancehunt. I am ready to promptly start writing the database architecture immediately after discussing all additional details and methods of collecting device fingerprints in private messages.

Budget: 8000 UAH Deadline: 5 days

Hello, Oleksandr! I am ready to develop a reliable and secure backend for your licensing system and seamlessly integrate it with the existing frontend on Lovable.dev.
How I will solve your main task — device binding:
The problem with ordinary web developers: Most will offer you a browser fingerprint. This is a leaky solution — the user clears the cache, changes the browser, and the license will fail or a new one will be generated.
My engineering solution: I develop system software (in C++ and Python) and know how to work at the system level. We will implement binding through a unique hardware identifier of the device (HWID — a combination of the hash sum of the motherboard's UUID, the processor's serial number, or the unique MachineGUID from the Windows registry).
Backend architecture: I will write a fast API using FastAPI + PostgreSQL. When the user activates the key, their utility sends the encrypted HWID to the backend. The server binds the key to this HWID permanently. Reactivating on different hardware will return a 403 Forbidden status.
We will also provide an admin panel for you, where you can manually generate keys and, if necessary (if the client has really changed PCs), reset the hardware binding with one click.
I am ready to discuss the details in private messages right now!

Budget: 12000 UAH Deadline: 6 days

Good day.

I can implement the backend for the licensing system and connect it to the existing frontend.

The functionality is clear: key generation, license activation, device binding on first launch, and checking to ensure that one key is not used on multiple devices.

I need to clarify a few details regarding the method of device identification and license issuance, but overall the task is understood.

In terms of timing — approximately 4-6 days.
In terms of cost — $300 after clarifying the details.

We can discuss the technical part in private messages. Expand

Budget: 8000 UAH Deadline: 7 days

Good day. I can implement such a system, but it is important to clarify: Lovable.dev is suitable as a frontend/prototype, while all the logic for licenses, binding, checks, admin panel, and database must be implemented as a separate backend/API.

So the architecture will be: Lovable frontend - custom backend - database.

If you need a fully functional production system, this is not "configuration in Lovable," but a separate backend development with integration into the ready frontend.

Budget: 8000 UAH Deadline: 7 days

Good day!

I am a Fullstack developer with commercial experience in creating modern, fast, and efficient websites. I work with both frontend and backend, so I can handle the task "turnkey" — from idea to finished product.

Budget: 15000 UAH Deadline: 14 days

Good day, I can develop the backend for your website without any problems - I have over 5 years of experience with Python, FastAPI/Django, REST API, and PostgreSQL. I will implement the licensing system from scratch: key validation, user binding, access restrictions - everything turnkey. We can integrate with the frontend on Lovable.dev via REST API without issues. A budget of 8000 UAH for a full backend seems underestimated - the actual cost starts from 15,000 UAH depending on the scope of functionality. We can discuss the details privately. Feel free to reach out!

Budget: 8000 UAH Deadline: 1 day

Hello.
I am ready to develop a reliable and secure backend for your licensing system, using modern approaches to designing RESTful APIs and enhanced cryptography for generating and validating license keys. The implementation of the license binding mechanism to the device will take into account resilient identifiers and efficient data storage with optimized database queries to ensure high system performance. I have significant experience in developing similar authorization and licensing systems, including ready-made templates for microservices architecture and CI/CD pipelines, which will significantly speed up the development process. I suggest discussing all implementation details, final budget, and timelines in private messages.

Budget: 8000 UAH Deadline: 1 day

Good evening, Oleksandr. I am a backend programmer, I will do it well so that hackers do not break your backend. I am waiting for details in private messages.

Budget: 8000 UAH Deadline: 3 days

Good day! I can do everything in Python using the FastApi libraries; on the frontend, you will only need to connect the REST API and everything will work.

I am ready for discussion.

Budget: 8000 UAH Deadline: 14 days

Hello! I see that the frontend is already ready at Lovable.dev, so we need to quickly set up the backend and connect the licensing system. That's the task at hand.

I have 3.5 years of commercial experience with TypeScript/NestJS + PostgreSQL. I have implemented similar access control mechanisms: issuing keys, activation, device binding (device fingerprint), and blocking reuse on another device. It’s not difficult to do it reliably if the tables and validation logic are designed correctly from the start.

For your case, I propose a REST API on NestJS: endpoints for issuing a license key (admin), activation (user), checking status, as well as storing the device identifier in the database upon first activation. Everything will have proper error handling and a clean architecture, making it easy to extend later.

I am ready to discuss the details and start quickly.

Budget: 8000 UAH Deadline: 2 days

Good day
I have already developed something like this, I will develop it and upload it to the server, link it to the site, and you will receive a ready working activation system for your site.
Write to me.

Budget: 8000 UAH Deadline: 5 days

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.

Budget: 8000 UAH Deadline: 30 days

Hello. I can do your project. I have experience. Write to me and we will agree.

Budget: 8000 UAH Deadline: 3 days

Good day! I am ready to quickly create a backend in Python. Please send detailed information via private messages.

Budget: 8000 UAH Deadline: 8 days

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.

Budget: 10000 UAH Deadline: 5 days

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. Expand

Budget: 8000 UAH Deadline: 8 days

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. Expand

Budget: 8000 UAH Deadline: 5 days

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.

Budget: 8000 UAH Deadline: 5 days

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.

Budget: 8000 UAH Deadline: 4 days

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.

Budget: 8000 UAH Deadline: 3 days

Hello, my main specialty is backend. I can do everything in the shortest time and with high quality. Feel free to write =)

Budget: 8000 UAH Deadline: 7 days

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.

Budget: 9000 UAH Deadline: 1 day

Hello, I have extensive experience in this. We can discuss the details. I will be happy to help you!

Budget: 8000 UAH Deadline: 6 days

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.

Budget: 8000 UAH Deadline: 5 days

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.

Budget: 8000 UAH Deadline: 3 days

Hello!!!
I will write in Node.js, I work quickly and perfectly. I have reviews and skills as well.
Feel free to contact me.

Budget: 8000 UAH Deadline: 5 days

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.

Budget: 8000 UAH Deadline: 14 days

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.

Budget: 8000 UAH Deadline: 3 days

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 Expand

Budget: 8000 UAH Deadline: 3 days

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.

Budget: 15000 UAH Deadline: 7 days

Hello. I have been working with Node.js for over 9 years. I am ready to complete the task.

Budget: 10000 UAH Deadline: 3 days

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 Expand

Budget: 8000 UAH Deadline: 5 days

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! Expand

Budget: 8000 UAH Deadline: 1 day

Hello! What should the backend be built on? I can quickly and efficiently write the backend for you.

Budget: 8000 UAH Deadline: 2 days

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!

Budget: 8000 UAH Deadline: 1 day

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.

Budget: 8000 UAH Deadline: 1 day

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.

Budget: 8000 UAH Deadline: 7 days

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!

Budget: 8000 UAH Deadline: 7 days

Good day, I am ready to perform. Experience over 10 years. Write to me privately.

Budget: 8000 UAH Deadline: 4 days

Good afternoon
I am ready to discuss the details in private messages
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Budget: 18000 UAH Deadline: 7 days

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 (:. Expand

Budget: 8000 UAH Deadline: 7 days

Hello! I can transfer the layout from Lovable to Laravel, feel free to contact me.

Budget: 8000 UAH Deadline: 5 days

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.

Budget: 8000 UAH Deadline: 5 days

I am a NodeJS developer. I am ready to take on this task. Write to me, we will discuss.

Budget: 8000 UAH Deadline: 3 days

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!

Budget: 8000 UAH Deadline: 5 days

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?