Hire the Best A/B Testing Specialists

40+ Hours Available Per Week As a Top Rated Plus full-time freelancer on Upwork with over 8+ years of expertise in Software Quality Assurance, I specialize in ensuring your applications are bug-free and deliver exceptional user experiences, backed by over 225+ 5-star ratings ⭐ from satisfied clients! 🚀 With 27,000+ hours work on Upwork, I have successfully tested 310+ Android and iOS mobile applications and over 120+ web apps, helping clients achieve seamless product launches and exceptional performance. My experience includes collaborating with renowned organizations like UNICEF and leading brands like Samsung, ensuring their software meets the highest quality standards. I test applications across all types of network conditions, including 3G, 4G, and 5G, as well as high-speed connections (1Gbps) and low-speed scenarios down to kilobits per second (kbps), ensuring optimal performance and usability under real-world conditions. Key Achievements: 🏆 Top Rated Plus freelancer with 8+ years of professional QA experience ⭐ 225+ 5-star reviews from satisfied clients 📌 300+ Upwork projects successfully completed 🤖 10+ AI Voice & Chat Assistant platforms tested (Retell, Bland, Vapi, Wishpond AI, Senior Care AI, etc.) 🚀 Tested and launched 70+ startup products successfully to the store ⏰ Worked over 26,900+ hours on Upwork. 📱 Android: Samsung Galaxy S24 Ultra, Samsung Galaxy S21 Plus, Poco X4, RealMe GT Master Edition, OnePlus 9, OnePlus 8T, Samsung A18 📱 iOS: iPhone 16 Pro Max, iPhone 14 Pro Max, iPhone 14 Plus, iPhone 13 Pro Max, iPhone 11, iPhone XR 💻 Desktop: MacBook Air, HP Pavilion X360, RealMe Book, Lenovo ThinkPad, Samsung Galaxy Book 4 & 5 Manual QA Skills: • AI Model Performance Testing • AI Agent Functional & Usability Testing • Conversational AI & Chatbot Testing • Requirement Analysis • Test Case Design & Execution • Defect Reporting & Management • SEO Testing • Functional Testing • End-to-End Testing • Integration Testing • Exploratory Testing • PWA Testing (Progressive Web App Validation) • Reverse Testing – Test with Invalid/Unexpected inputs to ensure robust error handling & stability • Regression Testing • Cross-Browser Testing • Mobile App Testing (iOS & Android) • Usability Testing • UI/UX Testing • Payment Gateway Testing • System Testing & Acceptance Testing • API Testing (Postman, Swagger) • Performance Testing (Basic manual approach using tools) 🤖 AI Testing Expertise • AI Model Performance & Response Accuracy Validation • Conversational Flow, NLP Intent & Entity Testing • Voice Agent Quality Testing (ASR, TTS, Latency, Filler Word Detection) • Knowledge-Base and Prompt Flow QA • Context Retention & Session Continuity Testing • Multi-Agent Coordination and Voice Call Testing • Real-World AI App Testing (Retell, Bland, Vapi, ElevenLabs, Play.ht, Wishpond AI, Senior Care AI) Tools & Platforms: • Bug Tracking & Management: JIRA, Trello, Asana, Linear, ScribeHow • Collaboration & Reporting: Google Sheets, Notion, Slack • Testing Platforms: BrowserStack, physical devices • Performance & Analytics Tools: GTmetrix, SimilarWeb • Documentation: Test Plans, Test Cases, Checklists, FRS, User Manuals Domains Expertise: • eCommerce (Shopify, WooCommerce) • SaaS Applications • Healthcare • Mobile Applications • Insurance • Banking & Financial Services • Gaming • Point of Sale (POS) • ERP Systems • OpenAI Integration With a strong commitment to delivering error-free, high-performing software, I aim to exceed quality expectations and provide products that users love. I am available for flexible timings across any time zone and dedicated to helping you bring your software to the highest standards of performance and user satisfaction. Why Choose Me? ✔️ Proven expertise in Manual QA testing ✔️ Comprehensive experience across web and mobile platforms ✔️ Skilled in test documentation, ensuring a structured and repeatable testing process ✔️ Ability to identify critical defects and edge cases ✔️ Adaptable to both Agile and Waterfall methodologies ✔️ Flexible work hours to meet your project needs ✔️ Expert in crawling websites to ensure flawless functionality and SEO perfection -------------------------------------------------------------------------------------------------------- Related Keywords: Manual Testing, API Testing, Web Testing, Mobile App Testing, Regression Testing, Cross-Browser Testing, Test Case Design, Jira, UI/UX Testing, End-to-End Testing, Functional Testing, Bug Reports, Quality Assurance, Payment Gateway Testing, iOS Testing, Android Testing, Test Plan, Usability Testing, User Testing, Software Testing, Manual QA, AI Testing, Chatbot Testing, Voice AI Testing, NLP Testing, Mobile App QA, Conversational AI, AI Model Evaluation, Reverse Testing, PWA Testing, Progressive Web App Validation, AI Apps Testing, Progressive Web Application, OpenAI, AI Apps, ChatGPT, Sora, Gemini, Generative AI, Chatbot

Instantly.ai Expert, Lemlist, Woodpecker, Apollo, Instantly, Lemlist, Smartlead, Clay, DNS, DMARC, DKIM, SPF, MX, Warmbox, Gmail Postmaster, Cold Email Expert, Cold Email Outreach Expert, Cold Email Marketing Expert, Email Deliverability ✅ If your cold emails aren’t landing in the inbox, your infrastructure isn’t optimized. ✔ I help businesses build powerful cold email systems that are technically sound, fully authenticated, and designed to scale safely. I specialize in cold email infrastructure, deliverability optimization, and outreach automation — ensuring campaigns perform consistently without risking domain reputation. ✔ Most campaigns fail because of poor backend setup, not copy. I configure complete sending environments, including domain setup, DNS records, SPF, DKIM, DMARC authentication, MX routing, inbox provisioning, SMTP/IMAP configuration, tracking domains, warmup strategy, and sending rotation systems. ✅ Services I Deliver: ✔ Cold email infrastructure setup ✔ Deliverability repair & spam fixes ✔ Domain reputation protection ✔ Outreach automation systems ✔ Campaign launch + optimization ✔ Email warmup & tracking ✔ DNS troubleshooting & correction I don’t just set up tools — I build long-term outreach systems. If you want a cold email system built properly from day one, I can help. ✅ 𝐖𝐡𝐚𝐭 𝐒𝐞𝐭𝐬 𝐌𝐞 𝐀𝐩𝐚𝐫𝐭: • Deep expertise in Instantly Email, Lemlist, SmartLead, and many others • Comprehensive understanding of email deliverability • Technical mastery of DNS configurations • Strategic approach to email warmup and campaign management ✅ 𝐂𝐨𝐫𝐞 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬: ✔ Complete Instantly Cold Email Infrastructure Setup and other Tools ( SmartLead, Lemlist, RichInbox) - Google Workspace, Microsoft 365, and Zoho mail configuration - Advanced DNS management (SPF, DMARC, DKIM) - Custom domain tracking implementation - Email warmup strategy development ✔ Technical Optimization - Deliverability troubleshooting - DNS record verification and correction - SMTP/IMAP configuration - Multi-tool integration setup ✅ 𝐕𝐚𝐥𝐮𝐞-𝐀𝐝𝐝𝐞𝐝 𝐁𝐞𝐧𝐞𝐟𝐢𝐭𝐬: • Complimentary Instantly.ai platform walkthrough • Access to proven email template resources • Ongoing technical support • Clear communication and quick turnaround I focus exclusively on technical implementation and infrastructure optimization - ensuring your email campaigns have the strongest possible foundation for success. ✅ Skills: Cold Email Marketing Strategy Cold Email Campaign Management Cold Marketing Automation Cold Email Outreach Cold Email Deliverability Optimization Cold Email Automation & Flows SPF, DKIM, DMARC Setup Lead Nurturing Sequences Cold Email Campaign A/B Testing Email List Management ✅ Tools I Use to Deliver Excellence:- - Email Deliverability: MX Toolbox, SendGrid, Mailgun, Postmark, SparkPost - Cold Email Outreach: Apollo, Lemlist, Instantly, Reply, Mailshake - LinkedIn Automation: Sales Navigator ✅ Email Marketing services: - Account setup & Optimisation - Email Copywriting and setup - Cold Email marketing campaigns - Cold Email Automation - Cold Email Flows setup - Analytics & Reporting ✅ Keywords: - Copywriting - Cold Email Marketing Automation - Relationship Management - Cold Email Management - Mass Email - Bulk Email - Cold Email - Lead Nurturing - Cold Email Deliverability - Cold Email Marketing - Cold Email Campaigns - Fractional Marketing - Landing Page Optimization - High-Level Solutions - DELIVERABILITY - Cold Email Automation - Omnichannel Automation - Cold Email Marketing Automation Strategy - Automated Workflow - Marketing Automation Software - Clickfunnel Optimization - Email Marketing - Email Marketing Specialist - Email Marketing Consultant - Email Marketing Expert - Online Marketing Expert - Bulk Email Design - Email Blast Design - Email Marketing Automation - Email Template Management - Long-tail keywords: - Responsive Email Template Development ✅ Cold Emailing Platforms: - Snov - Apollo - Woodpecker - Instantly - Lemlist - SmartLead - Hunter - Reply - Mailshake - Gmass - Vocus - Outreach #Instantly Expert #Lemlist #Woodpecker #Apollo #Lemlist #Smartlead #Clay #DNS #DMARC #DKIM #SPF #MX #Instantly #Warmbox #ClickMagick #GmailPostmaster #ColdEmailExpert #ColdEmailOutreachExpert #EmailDeliverability #ColdEmailOutreachExpert #ColdEmailCampaignSpecialist #ColdEmailCampaignManager #B2BColdEmailExpert #ColdEmailDeliverabilityExpert #ColdEmailCampaignSetupExpert #ColdEmailManagementExpert #SetupDKIM/SPF/DMARC&ConfigurationExpert #Instantly#CampaignManager #ColdEmailCampaignManager #ColdEmailSetupExpert #ColdEmailDomainsSetup #Warmups #InstantlyAccountSetupPro #SmartleadAccountSetupPro #ColdEmailDeliveryExpert #ColdEmailOutreachExpert

💯 Achieved 100% Job Success Score 🥇 (TOP RATED) Freelancer, showcasing an impressive reputation on Upwork. ⌚ 5000 h+ worked on Upwork! ⚡ Successfully tested 50+ project completions without negative feedback 🚀On A Mission to Make Software Products Bug Free 🕙 100% flexible, can work in any time zone Professional Background: 🏅 Certified QA Professional with 4+ years of expertise in defining and optimizing testing processes 🌐 Proficient in Web, Desktop, and Mobile Applications Testing 🌟 Specializing in Functional, Cross-Platform, Usability, and Performance testing 🧑🏻‍💻 Ensures the delivery of high-quality software products Career Highlights: 🖥️ Tested 100+ Web, Mobile, and Desktop Applications 📈 Worked on projects ranging from small-scale ventures to enterprise systems ⚡ Proven track record of promptly identifying defects during developmental stages, saving clients valuable time and resources ● During my work experience, I have found software testing to be the most enjoyable yet challenging job. It demands a great deal of focus, commitment, persistence, and hard work, and that's why I love this job. ● Undoubtedly, there are hundreds of testers around. However, what really sets me apart is my firm commitment to delivering quick and high-quality work. When I accept a project, I take a challenge along with it—a challenge to deliver it on time, within budget, and with maximum quality. ● I have experience with various areas like Healthcare, Finance Applications, Games, Mobile and Telecom, Supply Chain Management, Manufacturing, Legal, CRM, ERP, e-business, e-commerce, e-learning, SaaS Products, Wealth Management Applications, Websites, Social Media I have strong knowledge of the following technologies: ● Applications: Web, Desktop, and Mobile applications. ● Manual Testing: Smoke, Functional, Non-Functional, White/Black box, Sanity, Regression, UI, and UX ● Bug tracking tool: Atlassian JIRA, Asana, Mantis, Redmine, Zendesk, Trello, ActiveCollab, Teamwork, Azure, Notion, GitHub, Linear ● Test Case Management Tools: TestRail, QMetry, Zephyr, and TestLodge ● Cross-Browser Testing Tools: BrowserStack ● Operating Systems: All Windows versions, basic knowledge of Linux, and Macintosh ● Microsoft Office: Word, Excel, PowerPoint, Access, Outlook: 2007 -- up to the latest versions. ● Flexible Payment terms and a negotiable hourly rate for the right contracts I have Windows and OS machines, and Multiple Android and iOS devices available for testing. Hence, I can be a great asset for any company looking for a long-term relationship. Desktop: MacBook Pro 2020 (Sonoma 14) MacBook Air 2019 (Sonoma 14) iMac 2011 (High Sierra 10.13.6) Windows 7,10,11 Laptops with 13,14,15 inches screen sizes iOS Devices: iPhone 16 Pro Max (18.1) iPhone 14 Pro Max (18) iPhone 14 (16.1) iPhone 12 Pro Max (17.1.2) iPhone X (14.2) iPhone 7 Plus (14.2) iPhone 7 (12.1) iPad 8th Gen (16.1) Android Devices: Samsung Galaxy S22 Ultra (13) Samsung Galaxy S21 Ultra (13) Samsung Galaxy A14 (14) Samsung Galaxy J6 (10) Samsung Galaxy A02s (11) Techno Camon 20 (13) Oppo A3s (11) Huawei P10 Lite (7.0) QMobile Tablet Once you hand over your project to me, whether it's in the pre-launch stage, beta version, or upgrade of existing software, I will provide you with a comprehensive report highlighting bugs and any areas for improvement. My client satisfaction is my first priority. Please feel free to contact me :) Cheers! Hasnain Haider

With 12+ years of experience in Software Quality Assurance, I help product teams deliver reliable and high-performing software through structured software testing and QA practices. As an Expert Software QA Tester, I specialize in manual testing, automation testing, and API testing for web and mobile applications, ensuring stability, usability, and smooth user experiences before release. My approach focuses on identifying functional issues early, validating critical user workflows, and supporting development teams with clear and reproducible bug reports. I perform thorough manual testing, functional testing, regression testing, and end-to-end validation, along with test automation and API testing, to ensure consistent product behavior across different browsers, devices, and environments. I also support teams working on AI-driven products, performing AI testing, chatbot workflow validation, and testing intelligent systems to ensure reliable responses and accurate functionality. My expertise includes: • Manual Testing for Web Applications • Mobile App Testing (iOS & Android) • Functional Testing & Regression Testing • Automation Testing (Playwright / Selenium / Cypress / Appium) • API Testing (Postman, Request/Response Validation) • End-to-End User Flow Testing • Cross-Browser & Cross-Device Testing • AI Application & Chatbot Testing • Test Case Design & Execution • Bug Tracking & Detailed Issue Reporting • Agile Collaboration with Development Teams I primarily support Startups, SaaS companies, and product teams that need reliable QA support to strengthen release confidence, improve product quality, and reduce production defects. If you’re looking for an experienced Software QA Tester (Manual, Automation & API) to improve product quality and ensure smooth releases, I’d be happy to help. 🔹 Keywords: Software QA Testing, Manual QA Testing, Regression Testing, Usability Testing, End-to-End Testing, Integration Testing, AI Testing, Chatbot Testing, Cross-Browser Testing, SaaS Testing, Quality Assurance Engineer, Mobile App Tester, SaaS App Testing

Conversion rate optimization for Shopify Plus brands, DTC and B2B. I find where your store leaks revenue, then fix it. A luxury watch brand: sales up 144%. A haircare brand: subscription revenue tripled. If you're getting traffic but not sales, that's the gap I close, with A/B testing and real conversion data behind every change. This is conversion rate optimization done with data, not opinions. Most Shopify Plus stores lose 30 to 50 percent of their ad spend to friction in the funnel. I fix that by running CRO strategy and the Shopify build as one job, not three handoffs, so the whole store works toward one thing: more revenue per visitor. Top 1 percent Expert on Upwork. 10+ years of Shopify experience. Clients across the US, UK, UAE, and Australia. PROOF OF IMPACT → 200+ percent average conversion rate lift through data-driven redesigns. → 144 percent sales increase for a luxury watch DTC brand. → 500K extra revenue in 60 days for a B2B industrial platform. → 3.75 percent sitewide conversion rate for a haircare subscription brand. INDUSTRIES I SPECIALIZE IN Luxury and premium brands · Health, wellness, and recovery devices · Haircare, skincare, and beauty DTC · Supplements and nutraceuticals · B2B industrial and wholesale · Fitness and subscription ecommerce · Automotive parts · Footwear and apparel. COMMON PROBLEMS I SOLVE "Our store looks great but doesn't convert." I use heuristic analysis and CRO data to fix the gap between how a store looks and how it sells. "We need recurring revenue, not one-time sales." I build custom subscription flows with Recharge and Appstle to steady your monthly income. "We're tired of managing 5 different freelancers." You get one point of accountability instead of five. I own the strategy and the full Shopify build, design included. MY PROCESS Discovery and data audit I find your conversion killers with Convert, Hotjar, GA4, Triple Whale, and heatmap analysis, then map a cleaner path to purchase that lifts AOV and ROAS. Strategic UX/UI design Custom Figma designs made to sell. Mobile-first, at the level luxury and enterprise brands expect. Custom development and subscriptions Shopify Plus Liquid development, Online Store 2.0, Recharge and Appstle subscriptions, and migrations from WordPress, WooCommerce, or Magento. AI-assisted, human-led I use AI to speed up research and reporting, but every recommendation is mine, tested with Convert or VWO against real conversion data. WHAT CLIENTS SAY "Shameel was incredible. Clearly communicating throughout to deliver outcomes far over and above the scope. A true professional. 10/10 recommend." → Premium Menswear Brand, CRO and UX Audit "33 percent increase in revenue, 10 percent higher AOV, and more return customers. He never makes promises he can't deliver on. GREAT PARTNER." → Gail S., Founder and CEO "Great support and lots of insight on how to improve our conversion. I look forward to continue working with Shameel." → Landing Page CRO Client WHO IS THIS FOR → Shopify Plus brands that want to fix conversions or clear technical debt. → Enterprise migrations from WordPress or Magento to Shopify. → High-scale DTC launches that need a store built to grow. If that sounds like your store, let's talk. I work with brands that care about quality and long-term ROI. Click "Invite to Job" or "Hire Now" and let's find your missing revenue. Best, Shameel Nasir Shopify Plus CRO Specialist | Top 1%, Expert-Vetted 10+ Years | 110+ Projects | 100% Job Success

🏆 𝐓𝐎𝐏 𝐑𝐀𝐓𝐄𝐃 𝐏𝐋𝐔𝐒 𝐒𝐡𝐨𝐩𝐢𝐟𝐲 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 𝐈𝐧𝐝𝐞𝐩𝐞𝐧𝐝𝐞𝐧𝐭 𝐟𝐫𝐞𝐞𝐥𝐚𝐧𝐜𝐞𝐫 📞 𝘾𝙖𝙡𝙡 𝙣𝙤𝙬 𝙛𝙤𝙧 𝙖 𝙛𝙧𝙚𝙚 𝟑𝟎-𝙢𝙞𝙣𝙪𝙩𝙚 𝙘𝙤𝙣𝙨𝙪𝙡𝙩𝙖𝙩𝙞𝙤𝙣 🗓️ 𝙄𝙣𝙫𝙞𝙩𝙚 𝙢𝙚 𝙩𝙤 𝙮𝙤𝙪𝙧 𝙟𝙤𝙗, 𝙖𝙣𝙙 𝙄 𝙬𝙞𝙡𝙡 𝙨𝙘𝙝𝙚𝙙𝙪𝙡𝙚 𝙖 𝙘𝙤𝙣𝙫𝙚𝙣𝙞𝙚𝙣𝙩 𝙩𝙞𝙢𝙚 𝙛𝙤𝙧 𝙮𝙤𝙪𝙧 𝙘𝙤𝙣𝙨𝙪𝙡𝙩𝙖𝙩𝙞𝙤𝙣 ➤ 10+ years of experience in Shopify, Shopify Plus, Shopify Store Development, Shopify Store Designer, Shopify Theme development, Shopify Apps Development, Shopify Custom apps development, Shopify Public apps development, Liquid Coding and Shopify Storefront API and External API Integration ➤ Worked with more than 190+ Shopify projects. ► Completed 6300+ hours on Upwork. ➤ Good Written and Verbal English Skills 📅 Feel free to hit "𝐈𝐍𝐕𝐈𝐓𝐄" Button. Available to Start Immediately. 𝐌𝐲 𝐖𝐨𝐫𝐤 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 𝐢𝐧𝐜𝐥𝐮𝐝𝐞𝐬: ➤ Shopify | Shopify 2.0 | Shopify Plus | Shopify Partner | Shopify stores Design | Shopify Store Development | Shopify Apps | Liquid Coding | Shopify Templates ➤ Shopify App development from Scratch using NodeJS, React, Laravel, Yii Framework ➤ Setup Shopify Store with responsive designs and optimized websites for performance and user experience. ➤ Implemented custom features and configured various Shopify Apps for enhanced functionality ➤ Shopify Apps (Oberlo, Dsers, Dropified, Importify, Spocket, Eprolo, etc.) ➤ Expertise with Shopify Page Builder Apps (Shogun, PageFly, GemPages, etc. ) ➤ Shopify Store Design Using Figma, XD, Sketch and Photoshop. ➤ Shopify Custom Theme Design and Development (Free/Paid) ➤ Implemented custom features and functionality using Shopify's API and custom coding. ➤ Shopify Store Setup and Shopify Store Design ➤ Shopify Product template customization ➤ Custom checkout integration in Shopify ➤ Bold, and Recharge subscriptions. ➤ Shopify Store Management ➤ Shopify Store ongoing maintainance I'm available full-time (up to 40 hours per week) and dedicated to your projects. Hire me Today! So let's start the long-term business relationships :) 𝗥𝗲𝗹𝗮𝘁𝗲𝗱 𝗦𝗲𝗮𝗿𝗰𝗵: Aanchal Shopify Developers | Aanchal Shopify Designer | Shopify Templates Specialists | E-commerce Consultants | Ecommerce Website Development | Ecommerce Management Services & Solutions Shopify expert on Upwork. Shopify Developer Upwork. Shopify Designer Upwork Shopify Store set up Upwork. Shopify website development Upwork. Shopify Theme customization Upwork. #Shopify#ShopifyStoreDesigner#ShopifyonlinestoreDesigner#ShopifyEcommerceDesigner#ShopifyDeveloper#ShopifyDesigner #Ecommerce #WebDesign #CSS #HTML #ShopifyPlus #SEO #Dropshipping #FrontEndDevelopment #ResponsiveDesign #WebDesign #UIUX #WebDev #Shopifyexpertupwork #ShopifyDesigner #Shopify #Topratedplusdeveloper # ShopifyE-commercePlatform #ShopifyOnlinestore #ShopifyWebsiteDesign #ShopifyExpert #ShopifySpecialist #ShopifyAppDeveloper #Ecommerce #Dropshipping #FrontEndDevelopment #LandingPage #Shopifyexpertupwork #ShopifyPlus #Ecommercedeveloper 𝙍𝙚𝙜𝙖𝙧𝙙𝙨, @Aanchal #Shopify#ShopifyDesigner#ShopifyExpert #Shopifydeveloper #TopratedplusshopifyDesigner less