You will get Professional Cross-Platform App Testing: Web, iOS, Android Compatibility QA
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Top Rated
Project details
I provide comprehensive compatibility testing across all platforms: web applications, iOS, and Android devices. Ensure your application delivers a seamless, consistent user experience everywhere it's used.
✅ Testing Services Include:
• Web Application Testing – Cross-browser, responsive design, functionality
• iOS App Testing – iPhones, iPads, multiple OS versions
• Android App Testing – Various brands, devices, OS versions
• Platform Consistency – Feature parity & UI uniformity
• Performance Comparison – Speed & behavior across platforms
• API & Basic Security – Using Postman & ZAP for Audits
📋 Deliverables You Receive:
• Cross-platform bug report with severity levels
• Screenshots & recordings from all platforms
• Device/browser compatibility matrix
• Consistency assessment across platforms
• Performance benchmark comparison
🚀 Why Choose Me:
• True cross-platform expertise – not just mobile or web
• Real device testing on all platforms
• Consistency-focused – ensuring uniform user experience
• 7+ years multi-platform QA experience
Industries: AI, SaaS, FinTech, E-commerce, Healthcare, Education, Web3, ERP
Contact me for a free consultation and custom testing proposal!
✅ Testing Services Include:
• Web Application Testing – Cross-browser, responsive design, functionality
• iOS App Testing – iPhones, iPads, multiple OS versions
• Android App Testing – Various brands, devices, OS versions
• Platform Consistency – Feature parity & UI uniformity
• Performance Comparison – Speed & behavior across platforms
• API & Basic Security – Using Postman & ZAP for Audits
📋 Deliverables You Receive:
• Cross-platform bug report with severity levels
• Screenshots & recordings from all platforms
• Device/browser compatibility matrix
• Consistency assessment across platforms
• Performance benchmark comparison
🚀 Why Choose Me:
• True cross-platform expertise – not just mobile or web
• Real device testing on all platforms
• Consistency-focused – ensuring uniform user experience
• 7+ years multi-platform QA experience
Industries: AI, SaaS, FinTech, E-commerce, Healthcare, Education, Web3, ERP
Contact me for a free consultation and custom testing proposal!
Testing Platform
Website Testing, Mobile Testing, Software TestingDevice
PC, Mac, iPhone, iPad, Android Mobile Phone, Android TabletLanguage
EnglishWhat's included
| Service Tiers |
Starter
$300
|
Standard
$600
|
Advanced
$1,000
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 7 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages Tested | 30 | 50 | 70 |
Screen Recording Time (Minutes) | 20 | 40 | 60 |
Test Scenario | |||
Summary Report | |||
Annotated Screenshots | |||
Test Desktop | |||
Test Mobile |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$50 - $150
Retest Bug Fixes
(+ 2 Days)
+$150
End-to-end Regression Testing
(+ 3 Days)
+$200Frequently asked questions
124 reviews
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CM
Clint M.
Jun 11, 2026
QA for Data Heavy B2B SaaS Web Application
AD
Ana D.
May 11, 2026
Part-Time Freelance Bug Tester
Kawsher was a great find. We brought him on for software QA and he delivered consistently for over a year, thorough, reliable, and easy to work with.
He caught issues early, communicated clearly, and never needed his hand held. Exactly what you want in a contractor: someone who takes ownership and just gets it done.
Would absolutely recommend him to anyone looking for a solid QA analyst. Thanks for the great work, Kawsher, you made our team better.
He caught issues early, communicated clearly, and never needed his hand held. Exactly what you want in a contractor: someone who takes ownership and just gets it done.
Would absolutely recommend him to anyone looking for a solid QA analyst. Thanks for the great work, Kawsher, you made our team better.
FV
Franventas V.
Apr 27, 2026
TravelSuite Software
CM
Clint M.
Apr 13, 2026
Quality Assurance for iOS Mobile Apps
Kawsher was great int getting my app across the finish line by providing awesome QA! Highly recommend working with him!
MP
Matthew P.
Mar 17, 2026
Experienced QA Engineer (5+ Years Experience) for Custom Web Apps
Great person!
About Kawsher
Senior QA Lead | Manual Testing Specialist | AI SaaS FinTech Web & App
97%
Job Success
Bogra, Bangladesh - 3:15 pm local time
I am a Senior QA Engineer specializing in SaaS, FinTech, and AI-powered applications, helping startups and enterprises deliver stable, secure, and high-performance software products through structured manual and automation testing.
I work as a QA Engineering specialist for SaaS startups, FinTech platforms, and AI product teams, ensuring applications are reliable, scalable, and ready for production at enterprise quality standards.
My focus is on improving product quality, reducing production defects, and building efficient QA processes that support fast and safe software releases.
🟦 QA Engineering & Software Testing Services
I provide end-to-end Software QA and Quality Assurance services, including:
QA strategy, test planning, and test case design
Manual Testing (functional, regression, exploratory)
Cross-browser and cross-device testing
Bug reporting, tracking, and test documentation
Performance testing (Apache JMeter)
API Testing (Postman, REST API validation)
Security Audits (OWASP ZAP)
Automation Testing (Cypress, Playwright, Appium, Espresso)
CI/CD pipeline integration for automated testing
End-to-end software quality assurance
🟦 SaaS Application Testing
I specialize in testing complex SaaS platforms and web applications, including:
Multi-tenant SaaS systems
Subscription and billing workflows
User roles and permission systems
Dashboard and analytics platforms
Third-party API integrations
I help SaaS companies improve reliability, user experience, and release confidence while reducing production issues.
🟦 FinTech Application Testing
I test financial and payment-based systems with a strong focus on accuracy, security, and reliability:
Payment gateway testing
Transaction and wallet systems
Banking and financial dashboards
Data integrity and validation testing
End-to-end financial workflow testing
I ensure every financial operation is secure, accurate, and production-ready.
🟦 AI SaaS & LLM Application Testing
I also specialize in AI-powered SaaS and LLM-based applications, including:
AI chatbots and conversational systems
LLM-based workflows and applications
Prompt-response validation and testing
AI output accuracy and consistency checks
Behavioral testing of AI systems under real-world usage
I ensure AI systems behave reliably, safely, and predictably in production environments.
🟦 Tools & Technologies
Automation: Selenium, Cypress, Playwright, Appium, Espresso
API & Performance Testing: Postman, JMeter, REST APIs
CI/CD: Jenkins, GitHub Actions
Security Audits: OWASP ZAP
Bug Tracking: Slack, Linear, Jira, Trello, Asana
Test Management: TestRail, Confluence, Excel frameworks
🟦 Why Work With Me
Strong expertise in SaaS, FinTech, and AI QA systems
Skilled in both manual and automation testing
Ability to build scalable QA frameworks from scratch
Focus on real product stability and business outcomes
Experience working with fast-paced startup environments
If you are looking for a Senior QA Engineer for SaaS, FinTech, or AI applications, I can help you build a reliable QA process that improves product quality and reduces production risk.
Steps for completing your project
After purchasing the project, send requirements so Kawsher can start the project.
Delivery time starts when Kawsher receives requirements from you.
Kawsher works on your project following the steps below.
Revisions may occur after the delivery date.
Platform Analysis & Planning
✅ Application access across all platforms ✅ Platform-specific requirement gathering ✅ Test strategy for web, iOS & Android ✅ Device & browser matrix creation
Multi-Platform Testing
✅ Simultaneous testing across all platforms ✅ Feature consistency verification ✅ Cross-platform bug identification ✅ Performance comparison testing