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Aleksandar K.

Aleksandar K.

Python developer (BigData, WebScraping, BackEnd)

I am a seasoned data extraction and automation specialist with over 20 years of experience in web scraping, data mining, back-end development, Big Data processing, AI/LLM integration, and intelligent workflow automation. My core expertise is Python-based scraping and data engineering. I work with Scrapy, Selenium, Playwright, Scrapy/Splash, APIs, reverse engineering, and custom data extraction pipelines designed to collect, process, clean, enrich, and deliver large volumes of data reliably. In recent years, I have also focused heavily on AI-assisted data processing and automation. I build solutions that use AI/LLMs to classify, normalize, summarize, deduplicate, validate, and enrich scraped or imported data. This allows clients not only to collect data, but also to transform raw information into structured, useful, and decision-ready datasets. My services include designing and developing scalable scraping systems, automated data pipelines, back-end services, and AI-powered workflows that can process both batch and real-time data streams. My areas of specialization include: Large-scale web scraping and data extraction using Python, Scrapy, Playwright, Selenium, and APIs. Business listings, Yellow Pages, company directories, and country-specific databases. Travel, accommodation, booking, and ticket reservation websites. Specialized online databases in real estate, legal, medical, financial, and professional services. Search engine data extraction from Google, Bing, Yahoo, and other platforms based on client-defined criteria. E-commerce platforms, product catalogs, pricing data, stock availability, and competitor monitoring. Financial sector data extraction, real-time market data collection, and data stream processing. Complex API scraping, undocumented API analysis, and structured data extraction. Mobile app data extraction and reverse engineering for Android and iOS. AI-assisted data cleaning, classification, normalization, enrichment, and deduplication. LLM-based automation for text processing, entity extraction, summarization, and insight generation. Automated workflows that combine scraping, databases, AI models, notifications, dashboards, and reporting. I can deliver data in CSV, Excel, JSON, SQL dumps, or integrate it directly into databases such as PostgreSQL, MySQL, MongoDB, or existing client systems. I also build automated pipelines that continuously collect, process, validate, and update data with minimal manual intervention. My goal is not only to extract data, but to help clients turn raw information into structured, reliable, and actionable assets. Whether you need a one-time scraping project, a scalable data pipeline, AI-powered data processing, or full automation of a business workflow, I can design and deliver a robust solution tailored to your needs. I look forward to helping you use data, automation, and AI to improve your processes, support better decisions, and achieve your project goals.

🇷🇸Belgrade, Serbia$50/hr100% JSS4.78 (101)Since May 2014

Earnings and projects

MRR
$0

Last 6 months ÷ 6

World#21,947 / 412k
🇷🇸Country#300 / 4,015
Revenue, last 30 days
$0
Total earnings
$158k

Billed in all: $163k

World#21,947 / 412k
🇷🇸Country#300 / 4,015
Per project
$1.3k
Projects, last 6 months
0
World#209,850 / 412k
🇷🇸Country#1,916 / 4,015
Projects in all
121

Across 158 contracts

78% fixed22% hourly
World#21,478 / 412k
🇷🇸Country#364 / 4,015

Earnings, last 30 days

$163kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$160k$162k$164k$166kOct 8Oct 23Nov 7

Skills