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Kerim H.
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Kerim H.

Senior QA Engineer / Lead QA Engineer / ISTQB Certified

I help teams release reliable software through practical QA strategies, thorough manual testing, and maintainable test automation. I'm Kerim, a Senior QA Engineer and Automation QA Lead with 8+ years of experience testing web applications, mobile apps, APIs, and connected devices. I've worked with teams across healthcare, insurance, wellbeing, education, and IoT, contributing both as a hands-on engineer and as a QA lead managing and mentoring teams of around 10 engineers. ✓ 100% Job Success History ✓ 9000+ Combined Hours Logged ✓ ISTQB Certified Whether you need an automation framework built from scratch, stronger regression coverage, or someone to take ownership of your testing process, I can help. What I bring to your project: • Web automation — Playwright with TypeScript, Selenium with C#/.NET, and Cypress. Reliable end-to-end tests, reusable frameworks, and coverage of critical user journeys. • Mobile automation — Appium with WebdriverIO and TypeScript/JavaScript for iOS and Android, including real-device testing through BrowserStack. • API testing — Functional, integration, and negative testing for REST and GraphQL APIs, including authentication, authorization, and data validation. • AI-assisted testing - ChatGPT/Codex and Claude to accelerate test design, automation development, and failure analysis, with outputs reviewed for accuracy and maintainability. Playwright MCP and test self-healing. • Performance testing — k6 load, stress, spike, and soak tests to evaluate response times, identify bottlenecks, and assess system behavior under pressure. • CI/CD integration — Automated testing in GitHub Actions, GitLab CI, Jenkins, Azure DevOps, and TeamCity, with actionable reports to support release decisions. • Manual testing and QA leadership - Exploratory testing, regression, UAT, test planning, risk-based prioritization, code reviews, and team mentoring. What you can expect: ✓ Proactive communication and clear, actionable bug reports ✓ Maintainable automation your team can confidently build on ✓ Testing prioritized around business impact and real user behavior ✓ A dependable partner who follows issues through to resolution Whether you need help with a specific release or a long-term QA partner, let’s talk about your product, your current challenges, and what you need to ship with confidence.

🇧🇦Sarajevo, Bosnia and Herzegovina$30/hr100% JSS5.00 (1)Since Apr 2019

Earnings and projects

MRR
$2.2k

Last 6 months ÷ 6

World#19,583 / 412k
🇧🇦Country#48 / 903
Revenue, last 30 days
$3.3k

Last 6 months: $13k

World#11,186 / 412k
🇧🇦Country#28 / 903
Total earnings
$178k

Billed in all: $181k

World#18,293 / 412k
🇧🇦Country#43 / 903
Per project
$30k

$4.5k in the last 6 months

World#2,917 / 412k
🇧🇦Country#10 / 903
Projects, last 6 months
3
0% fixed100% hourly
World#66,479 / 412k
🇧🇦Country#107 / 903
Projects in all
6

Across 8 contracts

13% fixed87% hourly
World#250,290 / 412k
🇧🇦Country#630 / 903

Earnings, last 30 days

$181k+$3.3k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$178k$180k$182kOct 8Oct 23Nov 7

Skill rankings: Top 5% in Game Testing

Ranked by MRR among everyone on Upwork with the skill.

  1. #16Load Testing214 freelancers · 🇧🇦 #1Top 7%
  2. #39Game Testing852 freelancers · 🇧🇦 #1Top 5%
  3. #46Performance Testing563 freelancers · 🇧🇦 #2Top 8%
  4. #102Automated Testing1,000 freelancers · 🇧🇦 #2Top 10%
  5. #117Mobile App Testing1,834 freelancers · 🇧🇦 #2Top 6%
  6. #122Usability Testing1,980 freelancers · 🇧🇦 #2Top 6%
  7. #127Functional Testing1,649 freelancers · 🇧🇦 #2Top 8%
  8. #142Web Testing1,763 freelancers · 🇧🇦 #2Top 8%