Freelance projects

Freelance projects

Senior Web Scraper / Anti-Bot Engineer (OLX.pl) – Strict DoD & Code Transparency

Javascript and Typescript, Python — incorrectly specified categories?

657 USD

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We are looking for an experienced web scraping engineer who will design and implement a stable mechanism for extracting phone numbers from listings on olx.pl. We expect a ready, functioning product, not a test script.

We already have a database of listings that interest us.

Your process:

Retrieve the IDs of the listings from our API.
Bypass security measures (WAF, Datadome, reCAPTCHA, OLX anti-bot mechanisms).
Extract phone numbers (simulate interaction/clicking).
Return the collected numbers to our API endpoint.

Hard Definition of Done (DoD) & Architectural Requirements:The project will be considered completed and paid only after meeting the following conditions:

Code Transparency (Zero Vendor Lock-in): All source code must be committed to our Git repository from the first day of work.
Infrastructure Isolation: The solution must operate 100% on our VPS server (Linux headless). Sending traffic through external, hidden contractor servers is prohibited. The VPS will have outgoing traffic blocked outside our proxy gateways and target domain.
In-house Verification: Before releasing payment, the code will undergo rigorous code review by our internal development team for backdoors, architectural cleanliness, and actual WAF bypass logic.
Preferred Stack: Due to our ecosystem, we prefer solutions based on Node.js / TypeScript (e.g., Playwright/Puppeteer with appropriate stealth plugins), but we are open to solid solutions in Python if the architecture justifies it.

Scope and Performance KPIs:

Daily Goal: A minimum of 4,000 correctly extracted phone numbers in any 24-hour window.
Stability Test: Continuous, fully automated operation of the script for 4 consecutive days while maintaining the above KPI.
Error Handling: Advanced retry logic (max. 3 attempts per listing, in case of final absence of number mark in the database as NOPHONE). Full error logging.

We provide:

Dedicated VPS server (environment for testing and production).
High-quality rotating residential proxies.
Up to 20 prepared OLX accounts (with the possibility of automating session creation/management).
Documentation and access to our API (input/output).

We ask only those with experience in the subject to apply. In your offer, please include a brief description of the technical approach to bypassing the current OLX security measures.

Proposals 9

Artem Plakha

150 0

Budget: 2500 PLN Deadline: 1 day

Good day. I see that you still struggle to find a proper OLX parser. My offer stands. Let me know if you change your mind.

Attached work:

Similar project: Парсинг OLX в Google Sheets Looking forward to working with you!

Danish M.

20 0

Budget: 2500 PLN Deadline: 20 days

Hello, I am ready to work on your project, I develop bots on node.js, feel free to contact me.

Ivan Danyleiko

20 0

Budget: 3000 PLN Deadline: 20 days

Good day, I will develop and implement a stable mechanism for obtaining phone numbers from ads on olx.pl. Please contact me, we will discuss the details.

Ivan K.

4 0

Budget: 2500 PLN Deadline: 3 days

Good day. I am very skilled at bypassing various types of anti-bot systems. I can create a high-quality phone number parser. I will write it in Go + Playwright. Write to me and we will discuss!

Artur K.

39 0

Projects 39
Rating -
Rating 3 462

Budget: 3000 PLN Deadline: 7 days

Hello, I'd advice WebView2 (Microsoft programmable webview controller) for the most native behaviour. It will require Windows and will be programmed via C++, not Python or Javascript.

The previous project I have done were using this technology. Earlier I have also made a proxy-browser based on WebView2 - https://freelancehunt.com/showcase/work/brauzer-proksi-vkladkami/1593609.html

You should also declare the purpose of the scrapping, so the parsed data will not be illegally utilised.

Ruslan Zotsenko

7 0

Budget: 2500 PLN Deadline: 30 days

Hello, I can help with the implementation of this project, provided there is a 50% advance payment before the start of the project.

Krzysztof Krzysztof
Warszawa, Poland

Projects 2
Rating -
Rating 820

Senior Web Scraper / Anti-Bot Engineer (OLX.pl) – Strict DoD & Code Transparency

Artem Plakha

Danish M.

Ivan Danyleiko

Ivan K.

Artur K.

Ruslan Zotsenko

Proposals concealed

Proposals are currently absent