Hire the Best Ext JS Specialists in Delhi, IN

👋 Greetings! I am Girish an experienced developer with over 4+ years of expertise in front-end development, specializing in ReactJS, Next.js, Vue.js, JavaScript HTML, CSS, Tailwind etc. With a solid grasp of Vue and React principles, I also bring proficiency in related technologies such as Redux, Vuex, TypeScript and Node. Experience Overview * Four years of hands-on experience building complex applications with Vue and React. * Expertise in state management using libraries like Vuex and Redux. * Skilled in API integration and data fetching strategies. * Proficient in creating responsive designs and ensuring cross-browser compatibility. * Knowledgeable in performance optimization and accessibility best practices. * Excellent communication and teamwork abilities. * Highly motivated and committed with a strong work ethic. Here is a breakdown of my skill set: • React • Vue.js • HTML • CSS • JavaScript • Redux • React Native • Next.js • CSS & SASS/LESS • Bootstrap • jQuery • TypeScript • ESLint • Webpack • Vite • Responsive design • NPM • GIT • Tailwind CSS What I Offer * Project Translation: Ability to understand project requirements and convert them into a well-structured, maintainable codebase. * Code Quality: Commitment to delivering clean, efficient, and bug-free code that adheres to best practices. * UI Development: Expertise in building engaging, interactive user interfaces that are visually appealing and user-friendly. * Collaboration: Effective collaboration with team members, including designers and back-end developers. * Continuous Learning: Staying updated with the latest trends and advancements in React and Vue technologies. Seeking Projects That * Utilize my skills and experience in React and Vue development. * Provide intellectual challenges and stimulation. * Offer opportunities for collaboration and professional growth. * Have well-defined scopes and clear requirements. I look forward to discussing your project needs and exploring how I can contribute to your success. Feel free to reach out to schedule a free consultation. Best regards, Girish Chandra

I'm a JavaScript developer with a BCA degree and over three years of hands-on experience building powerful, user-friendly Chrome extensions. I specialise in developing custom tools that enhance the browser experience and solve real-world problems—both big and small. One of my key strengths is using **React.js** to build advanced, scalable Chrome extensions. I’ve developed large, feature-rich extensions using React, ensuring clean architecture, smooth performance, and a great user experience. Over the years, I’ve successfully delivered a variety of Chrome extension projects, including: - Custom new tab experiences - Web content manipulation and automation - Data extraction and web scraping - API integrations and real-time dashboards - Domain blocking tools - Productivity and developer-focused utilities Whether it’s a lightweight tool or a complex interface powered by React, I take pride in building polished, efficient solutions tailored to each client’s specific needs. I bring strong communication skills, attention to detail, and a positive, problem-solving mindset to every project. I’m comfortable working independently or with teams and always eager to take on new challenges and grow. If you're looking for a dedicated and experienced Chrome extension developer with a solid React.js foundation, I'd love to connect. Let’s talk about how I can help bring your ideas to life.

I'm a Full-Stack engineer with 4+ years of hands-on experience architecting, building, and deploying full-stack web applications from conception to production. My expertise spans both front-end and back-end development, with specialized knowledge in computer networking, cybersecurity, and web-based animation. Core Technical Expertise: My proven skills include JavaScript, Python, PHP, HTML5, and CSS, as well as modern frameworks and tools such as React.js, Next.js, Node.js, Express.js, Tailwind CSS, Firebase, Flask, FastAPI, AWS, Web Sockets for real-time communication, and Payment integration. I also specialize in emerging technologies, including AI Integration, Browser Extensions, Progressive Web Apps (PWAs), Selenium automation, and Data Scraping/Monitoring systems. What do I Deliver? Front-End Development: I create responsive, high-performance websites and applications with eye-catching UI/UX and seamless user experiences. I build scalable React.js applications, modern Next.js projects, and custom HTML/CSS implementations optimized for speed and accessibility. Back-End Development: I design and deploy robust APIs and server infrastructure using Node.js and Python. I architect efficient data management solutions and ensure databases perform at scale. Real-Time & Interactive Solutions: I develop Web Socket-powered applications for instant communication and engagement. I've created Web-based games and interactive experiences that keep users engaged. Automation & Integration: I build browser extensions that extend functionality, create data scraping and monitoring systems that work reliably 24/7, and develop automation scripts that eliminate tedious manual processes. Why Choose Me? I don't just code. I solve problems. I approach every project with a focus on scalability, security, and user experience. My background combines technical depth with a practical understanding of real-world constraints and requirements. I deliver solutions that work today and scale tomorrow. Verified Portfolio: For detailed examples of my work across all categories above, visit my GitHub and Upwork project history.

⭐️⭐️ Node.js | ExpressJS | JavaScript | Laravel | Lumen | CodeIgniter | REST API | API Security | Payment Gateway ⭐️⭐️ With 7+ years of rich experience in web and mobile app services, I bring a results-driven approach to delivering secure, scalable, and high-performing applications tailored to your business needs. ⭐️⭐️⭐️ My Core Expertise ⭐️⭐️⭐️ ☆ Mobile Application & Backend Development ☆ REST API Design & Security ☆ Website Development & Maintenance ☆ Existing System Audit & Enhancement ⭐️⭐️⭐️ Key Skills ⭐️⭐️⭐️ ☆ Node.js, Express.js, Next.js, TypeScript ☆ Laravel, Lumen, CodeIgniter ☆ MongoDB, MySQL, PostgreSQL ☆ HTML, Tailwind CSS, Bootstrap ☆ Git, GitLab, Bitbucket, SVN ☆ RESTful APIs & GraphQL ☆ Secure API Design, Validation, and Sanitization ☆ Logging & Monitoring (Laravel Telescope, Winston, etc.) ⭐️⭐️⭐️ Security & Performance Enhancements ⭐️⭐️⭐️ ✓ Robust input validation and sanitization to prevent XSS, SQLi, and other injection attacks ✓ Implementation of API rate limiting and request throttling to protect against abuse and brute-force attacks ✓ Use of secure HTTP headers (CSP, HSTS, etc.) to protect endpoints and data in transit ✓ Comprehensive logging and monitoring to detect anomalies and maintain system integrity ✓ Secure authentication with Laravel Sanctum/Passport, JWT, OAuth2 ✓ HTTPS enforcement and SSL configuration ⭐️⭐️⭐️ Third-Party API Integration ⭐️⭐️⭐️ ☆ Digio API Integration—For secure digital KYC workflows ☆ Signzy API Integration—For identity verification and fraud prevention ☆ HubSpot – Lead generation ☆ Msg91 – Messaging and email ☆ FYND – eCommerce management ☆ DynamicYield—Behavioral analytics ☆ Algolia – Fast, powerful search ☆ PixelBin – Image and video optimization ☆ SearchTab—Custom search engine integrations ⭐️⭐️⭐️ Additional Expertise ⭐️⭐️⭐️ ✓ Custom API CMS development ✓ Web scraping and data aggregation ✓ Ajax, jQuery for dynamic front-end interactions ✓ Payment Gateway Integrations: Stripe, Razorpay, PayU, CCAvenue, 2Checkout, Instamojo, Braintree, HSBC, Paytm At the heart of my work lie security, transparency, and performance. Whether you're building a new Laravel/Node.js system or strengthening an existing one, I ensure your application is secure, scalable, and future-ready. Let’s collaborate to build secure and successful digital experiences. Reach out now —I’d love to help secure and scale your product!

I’m a senior full-stack engineer and DevOps lead with 10+ years of product development experience and a strong track record on Upwork (100% Job Success, $200K+ earned). My career started with PHP/CMS systems (WordPress, Magento, Joomla, Drupal, CodeIgniter), where I built custom themes, plugins, and API integrations. Over time, I moved into modern JavaScript stacks — Node.js (since 2017–18) and Vue/Nuxt (since 2019) — and have been building scalable, data-heavy applications ever since. For the last several years, I’ve led the architecture and delivery of a large fintech/mortgage CRM built on Nuxt + Node.js GraphQL subgraphs, MongoDB/Atlas, and AWS. I’ve designed complex systems from scratch, including: Dynamic filtering & query engines for unstructured MongoDB data I built a rule-based filtration system where users can combine arbitrary conditions with nested AND/OR logic. The backend generates safe, optimised MongoDB queries at runtime and guarantees valid results even at high complexity. Cloud + container migrations and cost reductions Migrated infrastructure from EKS → ECS → EC2 + MicroK8s (self-hosted Kubernetes), including CI/CD automation, service orchestration, backups, and monitoring and self-hosted MongoDB clusters. Found bottlenecks and unused/non-essential services contributing to the AWS bills. Result: AWS cost cut from ~$30K/month to ~$3K/month, plus improved deployment reliability. High-throughput background processors & pre-compute pipelines Re-architected slow, query-heavy workflows by creating background workers to precompute filters and datasets, dramatically reducing DB load and improving app speed. Automated CI/CD + observability Built CLI tooling to auto-tag and deploy 20+ dependent repos via CircleCI → ECR, added ArgoCD for GitOps deployments, plus Grafana for monitoring/logging. I’m currently integrating AI/LLMs into the product stack using both self-hosted models and OpenAI APIs — building systems that generate MongoDB queries and analytics safely (without exposing sensitive data) and auto-draft personalised client emails based on minimal user input. What you get when you work with me A senior engineer who can own your feature end-to-end: frontend, backend, infra, CI/CD, data, performance. Clean, scalable architecture — not quick hacks. Strong product sense: I often contribute to UX and feature strategy, and I’ve led teams of up to 25 engineers. Core tech stack Frontend: Nuxt 2/3, Vue 2/3, SPA/PWA, component systems, performance tuning Backend: Node.js, Apollo GraphQL, federated/subgraph architectures, REST integrations Databases: MongoDB (advanced aggregations), MySQL/Postgres, Redis, SQLite Cloud/DevOps: AWS (EKS/ECS/EC2/ECR/S3/Route53/Lambda), Docker, Kubernetes/MicroK8s, ArgoCD, CircleCI, GitOps, monitoring AI: OpenAI API, self-hosted LLMs, retrieval/query generation, safe data-handling pipelines If you’re building a data-heavy product, modernising legacy systems, migrating infra, or adding AI to your stack, I can help you ship fast and safely. Skills Nuxt.js (2/3), Vue.js (2/3), SPA/PWA Node.js, TypeScript/JavaScript Apollo GraphQL, Federation, Subgraphs MongoDB (advanced queries, dynamic filters, aggregations) AWS: EKS, ECS, EC2, ECR, S3, Lambda, Route53, CloudWatch Docker, Kubernetes, MicroK8s ArgoCD, CircleCI, GitOps CI/CD System performance optimization LLM / AI integrations, OpenAI API