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40+ Hours Available Per Week Top Rated Plus full-time freelancer Manual QA with over 8+ years of experience in Software Quality Assurance, specializing in manual testing, functional and regression testing, cross-platform mobile and web application testing, API testing, workflow validation, and SaaS application QA. Extensive experience testing AI Voice & Chat Assistant platforms including Retell, Bland, Vapi, Wishpond AI, Senior Care AI, and more, along with marketplaces, booking systems, and enterprise applications. As a Top-Rated Plus freelancer on Upwork, I have delivered QA services to clients worldwide, backed by 250+ 5-star ratings ⭐, and tested 310+ mobile apps and 120+ web applications, collaborating with organizations like UNICEF and brands 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 27,400+ 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 15 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, 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

Struggling with bad CRM data and low reply rates? We combine AI prospecting tools with manual data mining to deliver 98%+ accurate, custom B2B lead lists. Turn your ideal customers into verified prospects. Marvel Technologies is a data services agency specialized in Prospect List Building, Lead Generation, Data Mining, Market Research, AI-Powered Lead Generation, Data Entry, Data Scraping, Company Research, Data Enrichment, List Building, and verified Email List Building. We work with businesses across all industries worldwide to build custom prospect lists based on your target industry, job title, company size, and location. Key Services: Lead Generation List Building Prospect List Contact List Email List Sales Lead List CRM Cleanup Data Mining Data Cleaning Data Enrichment Data Collection Data Processing Market Research Online Research Company Research Lead Research Data Entry Web Scraping LinkedIn Sales Navigator LinkedIn Lead Generation Administrative Support Key Deliverables - Generated over 9.5 Million+ B2B Contacts and Emails through advanced Data Collection, AI-Assisted Data Enrichment, List Building, Data Processing, and Data Cleaning for quality and accuracy. - Built, segmented, and maintained 12.5 Million+ business contacts and Prospect Lists with robust Research Methods and Contact Research with precise, validated, and verified information, at a sustained 98%+ deliverability rate verified through Zerobounce. Our Comprehensive Services - Lead Generation and B2B Lead Generation: Strategic development of highly segmented Prospect Lists, Data Extraction, and Sales Lead Lists for B2B Marketing, Sales, and Outbound Sales growth. - Email Marketing and Email List: Achieving superior Email Communication and campaign success with high-accuracy verified Contact Lists, verified by Zerobounce, and following best practices in Email Marketing and Email List Verification. - Data Cleaning and Data Processing: Maintaining up-to-date, accurate data pipelines with rigorous Data Validation, Data Cleanup, and regular Data Enrichment to ensure every Contact List and Email List is updated. - Data Mining and Market Research: Leveraging Online Research, Company Research, Competitive Analysis, and insight-driven B2B Marketing to produce actionable Sales strategies. - Lead Nurturing and Lead Scoring: Support for Sales, B2B Sales, and Marketing with compelling Lead Nurturing solutions and Lead Generation Strategy to maximize lead conversion. - Administrative Support: Driving team efficiency and supporting business scaling with reliable Administrative Support and Virtual Assistance. - Data Entry and Data Scraping: Thorough manual and automated Web Scraping to populate Contact Lists, Data Enrichment projects, and CRM Software resources. Industry-Specific Contact Lists Benefit from custom, quality-verified lists for: - CxOs, Startup Founders, E-Commerce Executives, Educators, Healthcare Leaders, Manufacturing Professionals, IT & Tech Specialists, Real Estate Contacts, Event Organizers, General Contractors, Plumbers, HVAC, and more - Data and lists are segmented by job title, function, company size, sector, geography, and more, optimizing your outreach for B2B Sales, Marketing Strategy, and Research initiatives. - All work incorporates LinkedIn Lead Generation and LinkedIn Sales Navigator for superior targeting, accuracy, and lead quality. Why Choose Us? - 15+ years in B2B Lead Generation, Data Entry, Data Enrichment, and List Building or List Builder with a history of delivering validated, accurate, and quality-driven contact databases. - A skilled team of more than 20 professionals in Online Research, Market Research, Data Scraping, and Administrative Support, trusted by businesses for reliable Prospect Research and Prospect List development. - Commitment to On-Time Delivery, verified data accuracy, and superior quality through regular Data Cleaning, verified List Building, and high-standard process adherence - Comprehensive Lead Generation Strategies supported by CRM and B2B Marketing, ensuring every database is ready for Sales and Marketing use - Advanced Web Crawling, Web Research, Internet Research, Email List Generation, and Virtual Assistance for continuous support to Sales and Marketing pipelines Trust us for your Lead Generation, List Building, Data Enrichment, Data Entry, Data Scraping, Market Research, Outbound Prospecting, Target Account List, AI-based Ideal Customer Profile (ICP) and Total Addressable Market (TAM) Research, Niche Contact Research, CRM Deduplication, HubSpot Data Management, Contact Segmentation, Sales Operations and Revenue Operations Support, Go-to-Market Support, GTM Research, Campaign List Preparation, Contact Discovery, B2B Contact Sourcing, Email Sourcing, Lead Qualification, MQL Support, SQL Support, Local Business Database, Data Deduplication, List Segmentation, Prospect Validation, Contact Verification, and all effective outreach and accuracy with your marketing goals.

I help US, UK, Canada & Australian businesses maintain clean, accurate, and decision-ready financials. With practical experience in bookkeeping, accounting, reconciliations, payroll support, and financial reporting, I specialize in helping businesses stay organized, improve cash flow visibility, and make confident financial decisions. My expertise includes: ✔ QuickBooks Online & Desktop ✔ Buildium & AppFolio bookkeeping ✔ Bank & Credit Card Reconciliation ✔ Accounts Payable & Accounts Receivable ✔ Cleanup & Catch-up Bookkeeping ✔ Payroll Accounting ✔ Financial Reporting ✔ Month-End Closing ✔ Real Estate & Property Management Accounting ✔ Excel & Financial Analysis I understand that business owners don’t just need data entry — they need reliable numbers they can trust. Whether it’s fixing messy books, reconciling accounts, managing property accounting, or preparing accurate financial reports, I focus on delivering detail-oriented and dependable accounting support. If you are looking for someone proactive, organized, and experienced with international accounting workflows, feel free to connect.

Top Rated Freelancer with 27,600+ hours and 600+ successful projects on Upwork. I help businesses build accurate sales pipelines, clean data systems, and scalable research workflows that actually drive results — not just spreadsheets. 💡 What I Do I combine lead generation + data + research + annotation to support both sales teams and data-driven projects. ✔ B2B Lead Generation & Prospect List Building ✔ LinkedIn & Email Outreach (Manual + Tools) ✔ Web Research & Market Research ✔ Data Entry, Data Mining & Data Enrichment ✔ CRM Data Entry & Management (HubSpot, Salesforce, Zoho, Pipedrive) ✔ AI Data Annotation & Data Labeling (Image, Text, NLP) ✔ General Research & Large-Scale Data Projects ✔ Virtual Assistance & Admin Support 🎯 How I Work (What Makes Me Different) I don’t just deliver data — I deliver usable, clean, decision-ready data. • Manual verification for high accuracy • Structured workflows & clear documentation • Fast turnaround without compromising quality • Ability to handle small tasks → large ongoing projects • Available as solo expert or team-based support 📊 Experience Snapshot • 27,000+ hours worked on Upwork • 600+ completed projects • Long-term clients across US, UK, Canada, Australia & Europe • Strong track record in lead generation + research-heavy projects 🛠 Tools & Platforms LinkedIn Sales Navigator • Apollo • ZoomInfo • Snov io HubSpot • Salesforce • Zoho • Pipedrive Google Sheets • Excel • Data scraping & automation tools Annotation Tools: Labelbox • CVAT (or similar) ⭐ What You Can Expect ✔ High-quality, verified data (no junk leads) ✔ Clear communication & fast response ✔ Reliable delivery on deadlines ✔ Long-term support mindset 🤝 Let’s Work Together If you need help with lead generation, data entry, research, or AI annotation projects, I can support you with accuracy, speed, and consistency. 👉 Click “Invite” and let’s discuss your project. 🔍 to find me you can search: B2B Lead Generation, Lead Generation, Prospect List Building, Contact List Building, Email List Building, Sales Prospecting, Appointment Setting, LinkedIn Lead Generation, LinkedIn Outreach, Email Outreach, Cold Email Campaigns, Account-Based Marketing (ABM), Data Mining, Data Extraction, Data Scraping, Web Scraping, Data Collection, Data Enrichment, Data Cleansing, CRM Data Entry, CRM Management, HubSpot CRM, Salesforce CRM, Zoho CRM, Pipedrive CRM, Web Research, Internet Research, Market Research, Company Research, Contact Research, Online Research, Competitive Research, Business Research, Data Entry, Excel Data Entry, Google Sheets, Data Processing, Data Analysis Support, Virtual Assistant, Admin Support, AI Data Annotation, Data Labeling, Image Annotation, Text Annotation, NLP Annotation, Data Tagging, Content Moderation, Dataset Preparation, General Research Projects

I help B2B companies generate more meetings by delivering manually researched, verified decision-maker contact lists built around your Ideal Customer Profile (ICP). No outdated databases. No bulk exports. Every prospect is researched specifically for your business and verified for high email deliverability. Achievements 🏆 Top Rated Freelancer 🏆 20+ Successfully Completed Projects 🏆 1,344+ Hours Worked on Upwork 🏆 8+ Years of B2B Lead Generation Experience 🏆 99%+ Verified Business Email Accuracy 📈 Results You Can Expect ✔ Highly Targeted Prospect Lists Built Around Your ICP ✔ Verified Business Emails for Better Outreach Success ✔ Clean, CRM-Ready & Deduplicated Data ✔ Access to Decision-Makers & C-Level Executives ✔ Reduced Time Spent on Manual Research ✔ Better Quality Leads for Outbound Sales Campaigns ✔ Reliable Data That Supports Business Growth ✔ Fast Turnaround Without Compromising Data Quality I believe in quality over quantity. Every lead is manually researched, verified, and reviewed to ensure it matches your Ideal Customer Profile (ICP). My goal is to deliver sales-ready data that helps your team book more meetings, increase response rates, and close more deals—not waste time cleaning inaccurate lists. I've supported agencies, SaaS companies, recruiters, IT service providers, and growing B2B businesses by delivering high-quality prospect lists that fuel outbound sales and CRM enrichment. 🛠️ Tools I Work With 🛠️ LinkedIn Sales Navigator 🛠️ Apollo io 🛠️ ZoomInfo 🛠️ Clay 🛠️ Hunter io 🛠️ RocketReach 🛠️ SalesQL 🛠️ Snov io 🛠️ NeverBounce 🛠️ ZeroBounce 🛠️ Debounce 🛠️ Lusha 🛠️ Crunchbase 🛠️ Google Advanced Search 🛠️ Google Maps 🛠️ Microsoft Excel 🛠️ Google Sheets 🛠️ HubSpot CRM 🛠️ Notion 📦 Deliverables 📄 Company Name 🌐 Website 🏢 Industry 👥 Decision Maker Name 💼 Job Title 📧 Verified Business Email 📞 Phone Number 🔗 LinkedIn Profile 🏢 Company LinkedIn 📍 HQ Location 🎯 Project Types I Frequently Handle ✔ B2B Lead Generation ✔ Prospect List Building ✔ ICP (Ideal Customer Profile) Research ✔ Decision-Maker & C-Level Contact Research ✔ LinkedIn Sales Navigator Research ✔ Verified Business Email Research ✔ Contact List Building & Data Enrichment ✔ Company & Market Research ✔ CRM-Ready Lead List Preparation ✔ Account-Based Prospecting (ABM) ✔ Local Business & Geographic Lead Research ✔ Startup & Investor Research ✔ Competitor Research ✔ Conference & Trade Show Attendee Research ✔ Custom Prospect Research Based on Client Requirements 🤝 Who I Help I work with businesses of all sizes, from startups to established enterprises, helping them identify and connect with their ideal customers. Industries & Businesses I Frequently Support 🚀 SaaS Companies 💻 Software Development Companies 🖥️ IT Services & Managed Service Providers (MSPs) 📈 Marketing & Digital Agencies 🏥 Healthcare & Medical Businesses 🏗️ Construction Companies 🏭 Manufacturing Companies 💰 Financial Services & Accounting Firms ⚖️ Legal Services 🏠 Real Estate Companies 🛒 E-commerce Brands 🚚 Logistics & Supply Chain Companies 🎓 Education & EdTech Organizations 👥 Staffing & Recruitment Agencies 🤝 Consulting Firms 📞 Telecommunications Companies 🏢 Local Businesses & Small Businesses 🌱 Startups & Growing Businesses 🏛️ Non-Profit Organizations 👥 Decision Makers I Help You Reach ✔ CEO ✔ Founder ✔ Co-Founder ✔ Owner ✔ President ✔ Managing Director ✔ Partner ✔ Managing Partner ✔ CTO ✔ CIO ✔ COO ✔ CFO ✔ VP of Sales ✔ Sales Director ✔ Marketing Director ✔ Operations Director ✔ Procurement Manager ✔ HR Director ✔ IT Director ✔ Business Development Manager ⭐ Why Clients Choose Me ✅ 100% Manual Prospect Research (No Generic Database Exports) ✅ Verified Business Emails for Better Outreach Performance ✅ High-Quality Decision-Maker & C-Level Contact Research ✅ Clean, Deduplicated & CRM-Ready Data ✅ Customized Lists Based on Your Ideal Customer Profile (ICP) ✅ Fast Communication & Reliable Delivery ✅ Ongoing Weekly Prospect Research Support 📈 My Research Process 1️⃣ Understand your Ideal Customer Profile (ICP) 2️⃣ Research target companies that match your criteria 3️⃣ Identify the right decision-makers 4️⃣ Find publicly available business contact information 5️⃣ Verify email addresses using trusted verification tools 6️⃣ Clean, deduplicate, and organize the data 7️⃣ Deliver a CRM-ready spreadsheet for immediate use Ready to generate more qualified leads and build a stronger sales pipeline? Send me a message with your Ideal Customer Profile (ICP), and I'll help you build a verified, CRM-ready prospect list tailored to your business goals.

12+ Years of Experience | 100% Data Accuracy Guaranteed I am a dedicated full-time freelancer specializing in high-precision Lead Generation, Online Research, Market Research, Data Entry and Data Collection. With over a decade of experience, I help businesses scale by delivering 100% verified email lists and actionable data insights. To ensure your complete confidence, I am always happy to provide a free sample before we begin our collaboration. 📧 Lead Generation & Prospecting ►B2B Lead Generation: Targeted lists tailored to your specific industry. ►LinkedIn Prospecting: Expert use of Sales Navigator to find key decision-makers. ►Email List Building: High-deliverability lists with 100% verification. ►Contact Discovery: Finding direct dials and verified personal/work emails. ►Data Cleaning: Verifying and updating your existing outdated databases. 📊 Market Research & Analysis ►Competitor Analysis: Deep-dive research into your market rivals. ►SWOT & Business Analysis: Identifying strengths, weaknesses, and opportunities. ►Market Segmentation: Breaking down demographics and pricing strategies. ►Infographic Data: Sourcing statistics for visual presentations. ►Web-Based Research: Comprehensive data collection from any online source. ►AI-Enhanced Accuracy: I use precision-prompted AI to synthesize large datasets, followed by human verification to ensure facts are accurate. ►Customized for Your Business: I don't just dump generic data; I tailor the insights to your specific niche and goals. ►Actionable Insights: My reports are designed to help you make decisions, not just store information. 💻 Data Entry & Web Research ►Web Scraping: Extracting complex data from websites into organized formats. ►CMS Management: Expert WordPress data entry and product uploads. ►File Conversion: High-accuracy PDF to Excel/Word transitions. ►Real Estate Data: Specialized entry for property listings and lead tracking. ►Administrative Support: Travel research, personal research, and repetitive tasks. 🛠️ Tools & Techniques ►Manual Verification: Human-checked data to ensure zero bounce rates. ►Premium Tools: Utilizing industry-leading platforms for accuracy and speed. ►Quality Assurance: Multi-step validation process for every project. Why Work With Me? My 12 years of comprehensive experience allow me to understand complex project requirements quickly. I don't just "enter data"—I provide efficient and practical assistance designed to help your business grow.