Alex Chen

Python automation engineer focused on web testing and scraping infrastructure. Writing about browser automation, anti-bot systems, and CAPTCHA handling.

Singapore Joined on Mar 22, 2026 https://www.passxapi.com/en

Work

Automation Engineer

Alex Chen

Mar 23

Responsible Web Scraping: Rate Limiting, robots.txt, and Keeping Your Scraper Legal

#pythonwebdautomationtutorialev

7 min read

Alex Chen

Mar 23

The Complete Anti-Bot Detection Stack: Every Technique Sites Use to Catch Your Scraper

#pythonwebdautomationsecurityev

6 min read

Alex Chen

Mar 23

reCAPTCHA v2 vs v3: What's Different, What Breaks Your Scraper, and How to Handle Both

#pythonwebdsecuritytutorialev

6 min read

Alex Chen

Mar 23

Managing Browser Pools for Large-Scale Scraping: Memory, Crashes, and CAPTCHA Handling

#pythonwebdautomationtutorialev

6 min read

Alex Chen

Mar 23

Building an ETL Pipeline for Web Scraping: From CAPTCHA-Protected Pages to Clean Data

#pythonwebdautomationtutorialev

7 min read

Alex Chen

Mar 23

Bypassing Cloudflare's Challenge Pages: JS Challenge, Managed Challenge, and Turnstile Explained

#pythonwebdautomationsecurityev

5 min read

Alex Chen

Mar 23

Browser Fingerprinting and CAPTCHAs: Why Headless Chrome Gets Caught and How to Fix It

#pythonwebdsecurityautomationev

5 min read

Alex Chen

Mar 23

Adding CAPTCHA Protection to Your Django or Flask App (And How Attackers Bypass It)

#pythonwebdsecuritytutorialev

6 min read

Alex Chen

Mar 23

Why Your Scraper's Location Matters: Geo-Distributed Scraping with CAPTCHA Handling

#pythonwebdautomationtutorialev

5 min read

Alex Chen

Mar 23

Monitoring Your CAPTCHA Solver: Prometheus Metrics, Grafana Dashboards, and PagerDuty Alerts

#pythonwebdautomationtutorialev

5 min read

Alex Chen

Mar 23

Building a High-Throughput Async Scraper with aiohttp and Automatic CAPTCHA Handling

#pythonwebdautomationtutorialev

6 min read

Alex Chen

Mar 23

Testing Your Scraper: How to Write pytest Tests for Code That Hits CAPTCHAs

#pythontestinwebdevtutorialg

5 min read

Alex Chen

Mar 23

Building a Reliable CAPTCHA-Solving Pipeline: Error Handling, Retries, and Circuit Breakers

#pythonwebdautomationtutorialev

5 min read

Alex Chen

Mar 23

FunCaptcha (Arkose Labs): How the Rotate-Image CAPTCHA Works and How to Solve It

#pythonwebdtutorialautomationev

5 min read

Alex Chen

Mar 23

hCaptcha vs hCaptcha Enterprise: What Changes for Your Scraper

#hcaptchapytautomationwebdevhon

4 min read

Alex Chen

Mar 22

Deploying a Production Scraper with Docker, GitHub Actions, and CAPTCHA Solving

#pythontutoriautomationwebdeval

6 min read

Alex Chen

Mar 22

Scraping JavaScript-Heavy Sites with Playwright and Automatic CAPTCHA Handling

#pythonwebdautomationtutorialev

5 min read

Alex Chen

Mar 22

Understanding reCAPTCHA v3 Scores: Why Your Scraper Gets Blocked Even Without a Checkbox

#pythonwebdapitutorialev

5 min read

Alex Chen

Mar 22

Proxy Rotation + CAPTCHA Solving: A Practical Guide to Resilient Web Scraping

#pythonwebdautomationtutorialev

4 min read

Alex Chen

Mar 22

Writing a Scrapy Middleware That Solves CAPTCHAs Automatically

#pythonwebdautomationtutorialev

4 min read

Alex Chen

Mar 22

Cloudflare Turnstile: What It Is, How It Works, and How to Handle It in Your Scraper

#pythonwebdautomationtutorialev

4 min read

Alex Chen

Mar 22

Building a High-Throughput Web Scraper with httpx and Async CAPTCHA Solving

#pythonwebdautomationtutorialev

3 min read

Alex Chen

Mar 22

Solving CAPTCHAs in Selenium Tests Without Slowing Down CI

#seleniumpythontestingwebdev #seleniumpython

2 min read

Alex Chen

Mar 22

How I Handle CAPTCHAs in Python Web Scraping (Without Losing My Mind)

#pythonwebdtutorialautomationev

4 min read

Alex Chen

Mar 22

How to Solve reCAPTCHA v2/v3 Programmatically in 2026

#captchapythonapi #webdev

1 min read

DEV Community

Alex Chen

Skills/Languages

Currently learning

Currently hacking on

Responsible Web Scraping: Rate Limiting, robots.txt, and Keeping Your Scraper Legal

The Complete Anti-Bot Detection Stack: Every Technique Sites Use to Catch Your Scraper

reCAPTCHA v2 vs v3: What's Different, What Breaks Your Scraper, and How to Handle Both

Managing Browser Pools for Large-Scale Scraping: Memory, Crashes, and CAPTCHA Handling

Building an ETL Pipeline for Web Scraping: From CAPTCHA-Protected Pages to Clean Data

Bypassing Cloudflare's Challenge Pages: JS Challenge, Managed Challenge, and Turnstile Explained

Browser Fingerprinting and CAPTCHAs: Why Headless Chrome Gets Caught and How to Fix It

Adding CAPTCHA Protection to Your Django or Flask App (And How Attackers Bypass It)

Why Your Scraper's Location Matters: Geo-Distributed Scraping with CAPTCHA Handling

Monitoring Your CAPTCHA Solver: Prometheus Metrics, Grafana Dashboards, and PagerDuty Alerts

Building a High-Throughput Async Scraper with aiohttp and Automatic CAPTCHA Handling

Testing Your Scraper: How to Write pytest Tests for Code That Hits CAPTCHAs

Building a Reliable CAPTCHA-Solving Pipeline: Error Handling, Retries, and Circuit Breakers

FunCaptcha (Arkose Labs): How the Rotate-Image CAPTCHA Works and How to Solve It

hCaptcha vs hCaptcha Enterprise: What Changes for Your Scraper

Deploying a Production Scraper with Docker, GitHub Actions, and CAPTCHA Solving

Scraping JavaScript-Heavy Sites with Playwright and Automatic CAPTCHA Handling

Understanding reCAPTCHA v3 Scores: Why Your Scraper Gets Blocked Even Without a Checkbox

Proxy Rotation + CAPTCHA Solving: A Practical Guide to Resilient Web Scraping

Writing a Scrapy Middleware That Solves CAPTCHAs Automatically

Cloudflare Turnstile: What It Is, How It Works, and How to Handle It in Your Scraper

Building a High-Throughput Web Scraper with httpx and Async CAPTCHA Solving

Solving CAPTCHAs in Selenium Tests Without Slowing Down CI

How I Handle CAPTCHAs in Python Web Scraping (Without Losing My Mind)

How to Solve reCAPTCHA v2/v3 Programmatically in 2026