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Muhammad S.
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Muhammad S.

QA Engineer & Penetration Tester | Web, API & Automation

Software Quality Assurance & Penetration Testing | Manual, Automation & Security With 7+ years of experience in software quality engineering, I help businesses test applications, uncover defects, identify security vulnerabilities, and deliver reliable software. My expertise covers both functional quality and application security, from requirements validation and automated regression testing to vulnerability assessments and penetration testing. Software Quality Assurance Manual, Functional, Regression & Sanity Testing Test Case Design, Execution & Defect Tracking UI/UX, Cross-Browser & Responsive Testing Web, Mobile & API Testing Test Automation with Playwright & Selenium End-to-End Testing, UAT & Release Validation Cybersecurity & Penetration Testing Web Application & API Penetration Testing Vulnerability Assessment & Security Audits OWASP Top 10 & Business Logic Testing Authentication, Authorization & Access Control Network Security Assessment Security Misconfiguration & Risk Analysis Vulnerability Reporting, Remediation & Retesting Tools & Technologies Playwright, Selenium, Postman, Burp Suite, OWASP ZAP, Acunetix, Nmap, Azure DevOps, and other testing tools appropriate to the project. What You Can Expect Clear test documentation, reproducible defects, verified security findings, actionable recommendations, and consistent communication with development teams. My approach combines a QA engineer's attention to application behavior with a security tester's focus on identifying weaknesses and validating risks. Let's discuss your project. Share your application, testing requirements, or security concerns, and I'll recommend the most practical assessment approach

🇵🇰Karachi, Pakistan$25/hr100% JSS5.00 (45)Since Sep 2020
GlobeUpwork

Earnings and projects

MRR
$1.4k

Last 6 months ÷ 6

World#36,016 / 412k
🇵🇰Country#4,197 / 52.9k
Revenue, last 30 days
$700

Last 6 months: $8.1k

World#53,658 / 412k
🇵🇰Country#6,515 / 52.9k
Total earnings
$202k

Billed in all: $209k

World#15,057 / 412k
🇵🇰Country#1,090 / 52.9k
Per project
$2.8k

$901 in the last 6 months

World#59,367 / 412k
🇵🇰Country#4,175 / 52.9k
Projects, last 6 months
9

Across 11 contracts

91% fixed9% hourly
World#21,105 / 412k
🇵🇰Country#4,824 / 52.9k
Projects in all
73

Across 91 contracts

53% fixed47% hourly
World#40,823 / 412k
🇵🇰Country#6,234 / 52.9k

Earnings, last 30 days

$209k+$700 earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$208.5k$209.0k$209.5kOct 8Oct 23Nov 7

Skill rankings: Top 6% in Blockchain Security

Ranked by MRR among everyone on Upwork with the skill.

  1. 3Blockchain Security49 freelancers · 🇵🇰 #2Top 6%
  2. #5Red Team Assessment61 freelancers · 🇵🇰 #1Top 8%
  3. #10Certified Information Systems Security Professional59 freelancers · 🇵🇰 #1Top 17%
  4. #16Internet Security196 freelancers · 🇵🇰 #3Top 8%
  5. #16Information Security Consultation161 freelancers · 🇵🇰 #5Top 10%
  6. #18Web App Penetration Testing235 freelancers · 🇵🇰 #5Top 8%
  7. #19Security Testing255 freelancers · 🇵🇰 #6Top 7%
  8. #19Network Penetration Testing212 freelancers · 🇵🇰 #4Top 9%