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IT Support Specialist with hands-on experience in Windows 10/11 administration, hospitality IT systems, and technical troubleshooting. I specialize in supporting hotel and business environments, including HRS integrations, Opera PMS, and Micros systems. I have experience diagnosing software and hardware issues, configuring workstations, assisting users remotely, and maintaining stable IT operations in fast-paced environments. I am reliable, detail-oriented, and focused on delivering fast and effective technical support. I can work independently or as part of a team and always aim to provide professional communication and high-quality service. Key Skills: • Windows 10/11 Installation & Administration • Technical Support & Troubleshooting • Remote Support (AnyDesk, TeamViewer, RDP) • Opera PMS & Micros Systems Support • HRS System Configuration & Integration • Network & Printer Setup • Software Installation & Maintenance • User Account & Access Management • Hardware Diagnostics • Microsoft Office & Google Workspace • Basic Networking (TCP/IP, Routers, Wi-Fi) • System Updates & Security Best Practices • Customer Support & Communication

Hi! I'm Md. Najmul Hassain. Digital marketer and app publisher expert. Specialist in 12 Testers Closed Testing. I help businesses run efficient, confidential closed testing with a vetted group of 12 skilled testers. From usability feedback to bug tracking, I provide accurate, structured results to refine your product before launch. Fast turnaround, secure process, and clear reporting guaranteed. Let’s make your release smooth and successful.

12 testers for 14 days Google Play Console Hello There, I'm a Google-certified app & game tester with over 13 years of experience . I specialize in high-quality testing services and white-hat backlink building to help boost your app’s visibility on Google safely and effectively. As a seasoned and trusted service provider, I focus on long-term results that help improve your rankings while maintaining the integrity of your app or website. ✅ Professional Testing ✅ White-Hat SEO & Backlink Strategies ✅ 100% Satisfaction Guaranteed Order now with confidence and let me help you take your app to the next level! Thank you.

I build modern web and mobile applications using .NET / ASP.NET Core, React, and MAUI — delivering robust back-ends, responsive front-ends and smooth cross-platform experiences. With 12+ years of solid experience in backend development, frontend frameworks, database work, and cross-platform app development, I’ve helped businesses deploy reliable solutions that scale. What I bring to the table: ✅ End-to-end ASP.NET Core backend (APIs, business logic, integrations) ✅ Front-end development with React (SPA, responsive UI, client-side logic) ✅ Cross-platform mobile/desktop apps using .NET MAUI — write once, run on multiple platforms ✅ Database design, optimization & migrations (SQL Server / MySQL), including complex data conversions ✅ Full-stack web apps: frontend + backend + database + integrations ✅ Clean, maintainable code with clear communication and timely delivery Whether you need a modern web app, RESTful API backend, or a cross-platform MAUI application, I deliver end-to-end, simplifying your project lifecycle. → C#, .NET 6 / .NET 7 / .NET 8 / .NET 9 → ASP.NET Core / MVC / Web API → React (JS/TS) → .NET MAUI (cross-platform apps) → JavaScript / TypeScript / HTML / CSS / Bootstrap → SQL Server / MySQL / Database Design & Optimization → Entity Framework / ORM → REST API / Backend Integrations → Full-Stack Web Application Development → Cross-Platform Mobile & Desktop App Development → Frontend-Backend Integration → Responsive UI / SPA Development → Code Maintainability & Clean Architecture → Version Control / Git ✅ What I Offer / Services Backend & API development: Build RESTful APIs, business logic, integrations, authentication, and data handling using ASP.NET Core Web front-end development: Create dynamic, responsive SPAs using React (JavaScript or TypeScript), integrating with back-end APIs Cross-platform apps (mobile & desktop): Use .NET MAUI to develop apps that run on Android, iOS, Windows (and other supported platforms) — ideal for maximum reach with minimum effort Database design and optimization: Design normalized schemas, optimize queries, migrate data between SQL Server / MySQL, and ensure efficient data handling Full-stack projects: Handle end-to-end development — from UI to backend to database — so you don’t need to coordinate between multiple freelancers Clean coding, maintainability & documentation: Write structured, readable code with good comments, version control, and documentation for easy future maintenance Let’s collaborate. Share your requirements, and I’ll propose a tailored solution that fits your needs and timeline.

I'm a Computer Scientist with a strong background in Multiplatform Systems, Artificial Intelligence (AI), and Natural Language Processing (NLP), dedicated to building intelligent, context-aware systems that solve real-world problems. With a passion for creating innovative and high-performance solutions, I’ve honed my skills in mobile development (particularly Android), web technologies, and multimedia processing. My technical expertise also spans reverse engineering, code analysis, AI development, and algorithm design allowing me to dive deep into complex systems and deliver scalable, efficient solutions. I also bring experience as a virtual assistant, blending technical knowledge with responsiveness to offer personalized, impactful support to individuals and teams. Whether I’m developing applications or solving intricate engineering challenges, I approach every task with precision, creativity, and a problem-solving mindset.

Hi, Are you looking for a reliable, detail-oriented, and experienced freelancer to handle your App Testing, Web Testing and Data Entry management? You’re in the right place! With strong analytical skills, fast typing speed, and 100% accuracy, I provide professional freelance services trusted by global clients on Upwork. Whether you need help testing your mobile app for bugs and usability, providing honest feedback or QA tester. I deliver quality results on time, every time. ✅ My Expertise Includes: App Testing & Web Testing – Functional testing, usability testing, bug reporting, UX feedback, and QA testing across Android, iOS, and desktop browsers. Data Entry Services – Accurate and fast data entry, data cleaning, formatting, and organization using Excel & Google Sheets. Copy & Paste Tasks – Quick, efficient data migration, text extraction, and content.