Setting up payments for a Telegram bot through a custom payment gateway.

Budget: 250 EUR Deadline: 7 days

Good day!
I have experience in developing backend solutions with user registration, linking accounts to Telegram, integrating payment webhooks, and processing payment statuses with consideration for idempotency and security. I am ready to implement the full cycle: generating binding tokens, validating events, updating subscriptions, integrating with the bot API, logging, and retry mechanisms. I will conduct end-to-end testing considering edge cases and ensure the stable operation of the system.
I would be happy to collaborate! :)

Budget: 250 EUR Deadline: 2 days

Hello!

I am ready to implement the entire scenario: user registration, secure binding to Telegram via a one-time token (TTL, idempotency), processing webhook from the payment system with signature verification and protection against duplicates, as well as sending events to the bot with retry and logging.

I will conduct end-to-end testing and take into account possible legacy nuances.
I can start in the near future.

Budget: 250 EUR Deadline: 4 days

Good evening, Vladimir!
In general, the task is clear, but for an accurate response regarding 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: 550 EUR Deadline: 6 days

Good day, I understand that it is necessary to carefully link three areas of responsibility: the website, the payment gateway, and the Telegram bot, taking into account security and duplicates.

I have done similar integrations, so I understand where real problems usually arise: idempotency, callback races, a broken bot API, legacy surprises.

Here’s how I would approach it:
1. Registration — a separate endpoint with proper validation, bcrypt/argon2, basic protection (rate limit, anti-bruteforce), a clean table schema without hacks for the future.
2. Linking Telegram — a one-time link_token (TTL + invalidate on use), deep-link through the bot, a confirming endpoint, strict verification of user ↔ telegram_id correspondence.
3. Processing paid — validation of the webhook signature, idempotency by payment_id/event_id, protection against reprocessing.
4. Bot notification — retry (1–3 attempts), logging, so that events are not quietly lost.
5. E2E testing: registration → linking → payment → event in the bot + edge cases.

In terms of timelines, realistically 4-6 working days considering testing and a buffer for integration nuances.

Regarding the budget:
1. If the backend is already structured and there is no chaotic legacy — the estimate is $450–650.
2. If reworking existing logic is required or there are old parts that may break — the range may shift to $700–900.

I can provide an exact estimate after clarifying:
— backend stack (Node / Python / PHP / other?)
— which payment gateway
— whether authorization and user tables already exist
— whether the bot has a separate backend or is monolithic

If needed, I can include a small post-release support. If this format works, let’s discuss the details. Expand

Budget: 250 EUR Deadline: 3 days

Hello. I can quickly set up the payment system for the Telegram bot. I am ready to start this week.

Budget: 250 EUR Deadline: 10 days

Hello! We are the Nexus Core team, and we have experience integrating websites with Telegram bots, deep linking, and processing payment webhooks with idempotency and end-to-end testing of the registration → payment → event in the bot chain. [core.telegram +2]
The tasks you described (registration, linking the account to Telegram, processing the "paid" status, webhook to the bot, and buffer for legacy nuances) are well understood by us in terms of architecture and typical risks. Please write in private messages — there we can quickly clarify which payment system is used, the backend stack, and the current database structure, and after that, we will propose a specific work plan and estimates for timelines/budget.

Budget: 250 EUR Deadline: 10 days

Hey, hope you're well!

Jumped into the spec — this is essentially a backend integration task connecting three systems: your web app, a payment provider, and a Telegram bot. Here's exactly how I'd handle each part:

**Registration** — build the endpoint with proper input validation, bcrypt password hashing, and basic protection (rate limiting, CSRF). DB table structure will be clean and migration-ready.

**Telegram linking** — generate a signed `link_token` (JWT or random hash) with a TTL stored in the DB, one-time use enforced by invalidating it on first confirmation. Works both ways — via website link or Telegram deep-link. On confirmation, the `telegram_id` gets permanently bound to the user record.

**Payment webhook** — accept the callback, verify the signature against your payment provider's secret, then update the subscription/user status. Idempotency handled by checking `payment_id`/`event_id` before processing — duplicate callbacks are safely ignored.

**Telegram bot notification** — after a successful payment, fire a request to your bot's API. I'll wrap it with retry logic (up to 3 attempts with backoff) and structured logging so nothing gets silently lost.

**Testing** — full end-to-end scenario covered: registration → TG linking → payment → bot event. Edge cases included: duplicate callbacks, failed payments, and temporary bot API unavailability.

I'm also comfortable digging into legacy code and handling integration surprises — that buffer is realistic and I'd rather flag issues early than hit them mid-project.

What stack is the web backend running on?

Looking forward to working on this with you! Expand

Budget: 250 EUR Deadline: 2 days

Hello. I am ready to complete your task. I will do everything quickly and efficiently. I look forward to collaborating!

Budget: 1000 EUR Deadline: 14 days

Hello. We are a web development team. We have all the necessary resources to complete your project. Please message us privately.

Budget: 250 EUR Deadline: 1 day

Hello!
I have experience in developing backend logic with payment integration, Telegram bots, and implementing idempotent webhooks, so I can take on the entire scope of tasks you described. Below is a brief outline of what I can implement.

User registration. Creation/modification of tables, data validation, password hashing, basic endpoint protection (rate-limit, CSRF/JWT, etc. — depending on your stack).
Linking the account to Telegram. Generation of a one-time link_token/deep-link, storage with TTL, endpoint for confirming the link, associating the user with telegram_id using a secure deep linking scheme.
Processing the "paid" status. Receiving callback/webhook from the payment system, verifying the signature/validity of the event, updating the subscription/user status, implementing protection against event duplication (idempotency by payment_id/event_id).
Event in the Telegram bot. Sending a request to the bot's backend after successful payment, error handling, retrying with 1-3 attempts and logging to ensure events are not lost.
End-to-end testing. Running the scenario: registration → linking TG → payment → event in the bot, checking edge cases (duplicate callback, unsuccessful payment, temporary unavailability of bot API) plus a buffer for legacy nuances with your current code.

Let's discuss the details in private messages: stack (Node/Python/PHP, etc.), which payment system you are using, whether there is already part of the logic/tables, as well as desired timelines. After that, I can propose a specific work plan and estimate for time and budget.

Budget: 250 EUR Deadline: 3 days

Good day! I have reviewed the task and am ready to start. I will do it efficiently and very quickly. I have over 5 years of experience in development. I live in Europe, so there will be no issues with power or connectivity.

Some projects that I have completed and participated in:

http://contentbuilder.ai/ - I officially worked at a startup that allows creating presentations, courses, etc. using AI.

sarafan.com.ua - website of a volunteer company

bionrgg.com (https://bionrgg.com/) - my solution for creating digital business cards for volunteers; I am a partner of the volunteer company Sarafan, which is a partner of Silpo.

https://freelancehunt.com/showcase/work/sayt-avtomobilnyih-poputchikov/1715396.html Expand

Budget: 250 EUR Deadline: 1 day

Hello, Vladimir.
I've read your description carefully.
I have already integrated successfully with several payment gateway into telegram mini app, telegram bot.
I am sure I can provide you perfect result.
Thank you.
Ifeoluwa

Budget: 250 EUR Deadline: 7 days

Hello.

I am developing bots for Telegram using NodeJS. I am ready to take on the project. Write to me, and we will discuss.

Budget: 250 EUR Deadline: 6 days

Good day!
I will create the functionality you need.
Write to me privately, we will discuss.

Budget: 250 EUR Deadline: 7 days

Hello!

I have carefully reviewed your project for setting up payment for a Telegram bot and I am ready to offer my services. I have 4 years of experience in development, and I have successfully worked with technologies that can significantly simplify the implementation of your project. I specialize in the Next.js stack for the frontend and Nest.js for the backend, which will allow for the efficient creation of the necessary endpoints and ensure secure processing of user data.

Additionally, my work with PostgreSQL and Redis will provide reliable storage and processing of binding tokens, as well as protection against duplicates. I am confident that using my technology stack will allow you to achieve higher performance and stability for the project.

Budget: 250 EUR Deadline: 5 days

Hello! I am glad about your offer, I have the time and experience for your project! The deadlines and cost are preliminary. Sincerely, Evgeny.

Budget: 250 EUR Deadline: 7 days

Ready to take on the job. I have practical experience in developing backend services with user registration, data validation, password hashing, and basic security measures. I have done integrations with Telegram bots (deep-link, token binding, working with telegram_id), implemented one-time tokens with TTL and confirmation endpoints.

Budget: 250 EUR Deadline: 3 days

Hello! Your project caught my attention. I am ready to start working and ensure high quality execution.