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Stanislav H.
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Stanislav H.

QA Engineer | Manual & Automation Testing for Web & Mobile Apps

I help identify critical bugs, broken workflows, and data inconsistencies before they impact users. My focus is practical QA not just checking features, but validating real user flows, business logic, integrations, and overall product stability. I work with web and mobile applications, SaaS platforms, dashboards, ecommerce systems, AI-powered products, and data-driven applications. What you can expect from me ✔ Clear, structured bug reports with reproduction steps, expected vs actual results, screenshots, and impact assessment ✔ Manual testing: Functional, Regression, Smoke, Sanity, Exploratory, User Acceptance, and End-to-End testing ✔ Strong edge-case and negative scenario coverage based on real user behavior ✔ API testing with Postman, including request validation, response verification, error handling, and workflow testing ✔ UI, API, and database validation to ensure consistency across systems ✔ Automation support with Playwright, Cypress, and Selenium ✔ Cross-browser and cross-device testing (Desktop, iOS, Android) ✔ DevTools usage for Network, Console, and request inspection ✔ Test case creation, test execution, bug tracking, and release validation ✔ Clear communication with developers, project managers, and stakeholders How I test I approach products the way real users interact with them: repeated actions, interrupted workflows, invalid inputs, mobile responsiveness, permissions, account states, and unexpected behavior. In addition to standard test execution, I use exploratory testing to uncover hidden issues, inconsistent states, failed requests, usability problems, and workflow gaps that may not be covered by predefined test cases. Tools & Technologies • Postman • Playwright • Cypress • Selenium • Browser DevTools • REST APIs • JSON / XML • SQL (basic querying and validation) • GitHub Actions • Jenkins My goal My goal is simple: help teams release reliable, stable, and user-friendly products by providing thorough testing, actionable feedback, and high-quality bug reports. Available for both short-term projects and long-term collaboration.

🇺🇦Bibrka, Ukraine$18/hr100% JSS4.78 (5)Since Jan 2025
GlobeUpwork

Earnings and projects

MRR
$2.8k

Last 6 months ÷ 6

World#13,890 / 412k
🇺🇦Country#839 / 14.3k
Revenue, last 30 days
$3k

Last 6 months: $17k

World#12,687 / 412k
🇺🇦Country#772 / 14.3k
Total earnings
$44k

Billed in all: $48k

World#84,092 / 412k
🇺🇦Country#4,751 / 14.3k
Per project
$7.3k

$8.5k in the last 6 months

World#23,023 / 412k
🇺🇦Country#1,549 / 14.3k
Projects, last 6 months
2

Across 3 contracts

0% fixed100% hourly
World#88,918 / 412k
🇺🇦Country#3,419 / 14.3k
Projects in all
6

Across 7 contracts

14% fixed86% hourly
World#250,290 / 412k
🇺🇦Country#9,758 / 14.3k

Earnings, last 30 days

$47.7k+$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
$44k$46k$48kOct 8Oct 23Nov 7

Skill rankings: Top 2% in English

Ranked by MRR among everyone on Upwork with the skill.

  1. #31Bug Tracking & Reports641 freelancers · 🇺🇦 #10Top 5%
  2. #33Performance Testing563 freelancers · 🇺🇦 #7Top 6%
  3. #35Bug Reports659 freelancers · 🇺🇦 #14Top 5%
  4. #40Test Results & Analysis533 freelancers · 🇺🇦 #5Top 8%
  5. #60Test Case Design957 freelancers · 🇺🇦 #14Top 6%
  6. #75API Testing1,365 freelancers · 🇺🇦 #13Top 5%
  7. #90Mobile App Testing1,834 freelancers · 🇺🇦 #19Top 5%
  8. #93Functional Testing1,649 freelancers · 🇺🇦 #19Top 6%