Javascript Developersพร้อมรับจ้างในQatar - หน้า 4
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freelancer ที่ได้รับการสนับสนุน
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ว่าจ้าง ShoaibRipper
ผู้เชี่ยวชาญความปลอดภัยระบบสารสนเทศที่ได้รับการรับรอง (CISSP), ความปลอดภัยคลาวด์, การรักษาความปลอดภัยของคอมพิวเตอร์, วิทยาการเข้ารหัสลับ, ไฟร์วอลล์I'm a certified ethical hacker with a bachelor's degree in cybersecurity, specializing in identifying and mitigating security vulnerabilities to protect systems and networks.I'm a certified ethical hacker with a bachelor's degree in cybersecurity, specializing in identifying and mitigating security vulnerabilities to protect systems and networks. ย่อ -
ว่าจ้าง faroukk9
I am a cybersecurity specialist with 8 years of hands-on experience in penetration testing, vulnerability assessment, and securing web applications. I hold globally recognized certifications including OSCP, CEH, and CISSP, and I specialize in Red Teaming, web application security, and network penetration testing. In...I am a cybersecurity specialist with 8 years of hands-on experience in penetration testing, vulnerability assessment, and securing web applications. I hold globally recognized certifications including OSCP, CEH, and CISSP, and I specialize in Red Teaming, web application security, and network penetration testing. In addition to my cybersecurity expertise, I am a full-stack developer, skilled in building and securing modern web applications using Angular, .NET, and SQL. My dual expertise in development and offensive security allows me to deliver secure, high-quality applications while identifying and mitigating vulnerabilities at every stage of development. Services I offer: Web & API Penetration Testing (with detailed reporting & remediation guidance) Network & Infrastructure Security Assessments Red Team Engagements & Exploitation Exercises Secure Web Application Development (Front-end & Back-end) Code Review for Security & Performance I am passionate about helping businesses strengthen their security posture while maintaining functionality and performance. Whether you need a detailed penetration test report, secure code development, or consultation on cybersecurity best practices, I can provide end-to-end solutions tailored to your needs. ย่อ -
ว่าจ้าง rajbirsah21
I specialize in web-related tasks, including designing websites for users and conducting data analysis and visualization.I specialize in web-related tasks, including designing websites for users and conducting data analysis and visualization. ย่อ -
ว่าจ้าง soufrochdi
About Me (Upwork Profile Overview — Full-Stack + React Native) I build fast, scalable, and reliable applications using React, React Native, Node.js, Express, MySQL, and PostgreSQL. My work focuses on clean architecture, optimized APIs, and modern UI development that works smoothly across web and mobile. I’ve...About Me (Upwork Profile Overview — Full-Stack + React Native) I build fast, scalable, and reliable applications using React, React Native, Node.js, Express, MySQL, and PostgreSQL. My work focuses on clean architecture, optimized APIs, and modern UI development that works smoothly across web and mobile. I’ve developed full ERP modules (inventory, sales, purchasing, accounting, warehouses) and custom dashboards using React + Node.js + Sequelize, with secure authentication, role-based access, and multi-warehouse data logic. On the mobile side, I deliver React Native apps with smooth navigation, API integration, and production-ready UI. What I can deliver Full-stack web apps (React, Node.js, REST APIs) Mobile apps with React Native Admin dashboards & ERP modules Secure authentication (JWT, RBAC) Database design (MySQL / PostgreSQL) Bug fixing, performance optimization API development & integration Tech stack React, Next.js, React Native, Node.js, Express, MySQL, PostgreSQL, Sequelize, Tailwind, Docker, Git, JWT, REST APIs I deliver clean code, clear communication, and reliable results ย่อ -
ว่าจ้าง muhammedqazi
As a mobile application architect, I specialize in 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 and am responsible for designing and 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗶𝗻𝗴 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗶𝗢𝗦 𝗮𝗻𝗱 𝗔𝗻𝗱𝗿𝗼𝗶𝗱 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 𝘁𝗮𝗶𝗹𝗼𝗿𝗲𝗱 𝗳𝗼𝗿 𝗿𝗲𝗮𝗹-𝘄𝗼𝗿𝗹𝗱 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻 𝗲𝗻𝘃𝗶𝗿𝗼𝗻𝗺𝗲𝗻𝘁𝘀 I don't just implement features; I design the ecosystems of mobile applications. I create clear, scalable architectures...As a mobile application architect, I specialize in 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 and am responsible for designing and 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗶𝗻𝗴 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗶𝗢𝗦 𝗮𝗻𝗱 𝗔𝗻𝗱𝗿𝗼𝗶𝗱 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 𝘁𝗮𝗶𝗹𝗼𝗿𝗲𝗱 𝗳𝗼𝗿 𝗿𝗲𝗮𝗹-𝘄𝗼𝗿𝗹𝗱 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻 𝗲𝗻𝘃𝗶𝗿𝗼𝗻𝗺𝗲𝗻𝘁𝘀 I don't just implement features; I design the ecosystems of mobile applications. I create clear, scalable architectures that facilitate long-term growth, subscriptions, payments, and instant functionality, from user interface performance to server infrastructure. 🔥 My expertise includes building advanced mobile systems with: - Push notifications (FCM & APNs) - RevenueCat subscription architecture - Apple Pay & Google Pay integrations - Stripe payment systems - End-to-end Supabase-supported systems - Secure authentication (JWT, OAuth, Firebase, Supabase) - Biometric authentication (Face ID / Fingerprint) - Camera & media pipelines - Deep linking & background processing - Real-time features (WebSockets / Firebase/ Supabase) - Offline-first & caching strategies - Custom Swift native modules for performance-critical features In addition to mobile applications, I design backend systems using Node.js and Go, design REST/GraphQL APIs, PostgreSQL databases, and deploy scalable infrastructure on AWS and DigitalOcean with CI/CD automation. 🏆 Systems I’ve Architected & Delivered: - AI-powered mobile platforms - IoT-connected applications - Fintech & subscription-based ecosystems - SaaS mobile + dashboard products - Marketplace and payment-driven apps - Enterprise-grade internal platforms - MVPs that scaled into production environments 🎯 My focus is on: - Clean scalable architecture - Payment & subscription-ready systems - Performance optimization - Secure production deployments - Full technical ownership If you’re looking for a developer, there are many. If you’re looking for a Mobile Architect who can design and scale your product properly from day one, I’m ready to lead. Keywords Mobile App Development, iOS App Development, Android App Development, React Native App Development, Cross-Platform Mobile App Development, Native App Development, Hybrid App Development, Mobile UI/UX Design, Firebase Integration, Payment Gateway Apps, Real-Time Chat Apps, Video Calling Apps, Location-Based Apps, E-commerce Apps, Fitness Apps, Social Networking Apps ย่อ -
ว่าจ้าง ziakn03
Full Stack with a demonstrated history of working experience in the software industry. Skilled in Laravel, Vuejs, Vuetify, Vuex, Vuerouter MYSQL, SQL, SQL Server, Google Place API, Currency Conversion API, Git, GitHub, Bit-bucket, Rest Web Services, JSON, Management, Project Analysis, Software Documentation, Vs-code,...Full Stack with a demonstrated history of working experience in the software industry. Skilled in Laravel, Vuejs, Vuetify, Vuex, Vuerouter MYSQL, SQL, SQL Server, Google Place API, Currency Conversion API, Git, GitHub, Bit-bucket, Rest Web Services, JSON, Management, Project Analysis, Software Documentation, Vs-code, Visual-studio, Vanilla java-script, Type script, Es5, Es6, PHP 7,SPA. ย่อ -
ว่าจ้าง kgamal105
coding and designing innovative websites. Normally their task of website development starts right from the home page to website functionally and site layouts. Some of the specific job responsibilities that are taken up by these developers include writing a well designed testable code, creating website layout or...coding and designing innovative websites. Normally their task of website development starts right from the home page to website functionally and site layouts. Some of the specific job responsibilities that are taken up by these developers include writing a well designed testable code, creating website layout or interface using HTML or CSS, integrating data from back-end services, creating and maintaining software documentation, maintaining, expanding, scaling and modifying the website, collaborating with other web designers for matching visual designing intent. ย่อ -
ว่าจ้าง SahiMaran91
I am a freelancer . I have a knowledge in HTML, CSS, Java script. I am very eager to do the job. I am sure i do perfectly the project.I am a freelancer . I have a knowledge in HTML, CSS, Java script. I am very eager to do the job. I am sure i do perfectly the project. ย่อ -
ว่าจ้าง mertcan60
I'm an experienced full-stack developer with a strong background in building scalable, maintainable web applications. Proficient in C#, Python, HTML, and CSS, I specialize in both front-end and back-end development, with a focus on clean code, performance optimization, and seamless user experiences. Over the years,...I'm an experienced full-stack developer with a strong background in building scalable, maintainable web applications. Proficient in C#, Python, HTML, and CSS, I specialize in both front-end and back-end development, with a focus on clean code, performance optimization, and seamless user experiences. Over the years, I've contributed to a wide range of projects--from enterprise-grade platforms to agile startups--bringing a solution-oriented mindset and a passion for continuous learning. I'm comfortable working across the full development lifecycle and enjoy collaborating with multi-national teams. ย่อ -
ว่าจ้าง yasircs24
I am an IT professional with a B.Sc. in Computer Science and certifications in CompTIA A+, Google IT Support, and CCNA. I have 1 year of experience assisting employees with PC, printer, and desktop application issues. My skills include technical support, troubleshooting, system administration, networking, and IT...I am an IT professional with a B.Sc. in Computer Science and certifications in CompTIA A+, Google IT Support, and CCNA. I have 1 year of experience assisting employees with PC, printer, and desktop application issues. My skills include technical support, troubleshooting, system administration, networking, and IT security fundamentals. I specialize in: ✅ IT Support & Troubleshooting – Resolving hardware, software, and network issues efficiently. ✅ System Administration – Managing Windows Server, Linux, and Office 365 environments. ✅ Networking – Configuring Cisco routers, switches, and network security. ✅ Web Development – Building websites with HTML, CSS, and JavaScript. ✅ Data Entry & Word Processing – Fast and accurate data handling with Microsoft Office & Google Docs. ✅ AI-Powered IT Solutions – Using AI tools for troubleshooting, documentation, and automation. I am detail-oriented, tech-savvy, and committed to delivering fast, reliable, and high-quality IT solutions. Let’s work together to solve your IT challenges! ? ย่อ
