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✅ ABOUT ME: I am a Professional Full Time Freelancer. I have 8+ years of experience working on Windows/Linux server administration, CICD Devops ,AWS, Azure, windows/Linux troubleshooting, HyperV, proxmox servers, DNS records mapping, IIS, Domains and DNS records management, active directory, web server, webhosting, databases administrations and Mail server implementations, administrations for the mail services MS Office365, Gsuite, Zimbara and postfix . ✅ WHY ME? • Full-time Professional – I work on Upwork as a full-time freelancer. I take every project seriously and I am highly professional. • Highly responsive – I’ll always get back to you in less than 02 hours. • 100% Client satisfaction – I provide revisions and modifications even after our contract ends. • I provide accurate solutions and just as important, I can guide you to future prospects and put your project on the right track. • Good communication skills – You will find me very friendly to talk to. ========================================= #Windows Servers - clients #Linux Server - clients #Web servers - IIS, Apache, XAMPP, Nginx and Tomcat #Database Servers - MSSQL, ORACLE, MYSQL, MongoDB #Webhosting tools- Plesk, cPanel and CWP #Cloud services providers - AWS, Azure, GCP, Digital Ocean, World stream, OVH Cloud, Hetzner and Hosting raja #Hosting providers - Hostinger, Bluehost, Namecheap, Godaddy, Bigrock and Hostgator #Active Directory - setup, users creation, Centralized Management, policy creation and enhanced Security #Troubleshooting - L1, L2 Tools used ============== Github, SVN IIS,Apache,Tomcat,Nginx , Apache Kafka and Wordpress SSH, RDP, VNC, Anydesk, Splashtop and screen connect Mobaxterm,Toad,SSMS and Workbench Plesk,WHM,Cpanel Active Directory, IAM Servicenow, Redmine, Microsoft Teams and Slack Previous Clients Feedback: 1- "Karthik was an exceptional Upworker to deal with. He was responsive, communicative, knowledgeable and proactive at solving my urgent technical issue (my businesses website was down for an unknown reason) and I wouldn't hesitate to recommend him to anyone else seeking an excellent technical support specialist. Thank you Karthik!" 2- "Karthik went above and beyond to progress with a very difficult issue in a very short period of time. He is kind, hard-working, and knowledgeable." 3- "I recently had the pleasure of working with "Karthik Raja" on installing PMB Software project, and I must say it was an outstanding experience from start to finish. I highly recommend "Karthik Raja" to anyone seeking top-notch freelancing services." 4- "he provides ideas to solve our problems he is a best gem have ever met. He focused only in customer satisfaction. no negative reviews." So why wait? Just invite me to your job on Upwork so we can discuss how to make your project a success. Let’s work together and get it done!! Thanks, Karthik

With more than a decade of hands-on experience in Linux server administration, I bring deep expertise in managing, optimizing, and troubleshooting complex Linux infrastructures. I have provided enterprise-grade web hosting and server support for major platforms including Hostinger, GoDaddy, Bluehost, OVH, DigitalOcean, Hetzner, and IONOS, supporting large-scale shared, VPS, and dedicated environments. My skill set includes comprehensive WordPress management and migrations, covering site deployments, performance optimization, security remediation, malware cleanup, and zero-downtime migrations. I also specialize in architecting and maintaining robust web stacks using Apache, Nginx, BIND DNS, PHP (5.x–8.x), and MySQL/MariaDB, with a strong focus on reliability, performance, and security. I have a proven track record of handling critical tasks such as server security hardening, kernel upgrades, and server performance optimization. Additionally, I am proficient in administering and monitoring Linux servers remotely using advanced tools and technologies. Key Specialties: Linux System Administration (CentOS, AlmaLinux, RHEL, Debian, Ubuntu, CloudLinux) Large-scale server migrations, including WordPress and Joomla migrations Server upgrades, including CentOS 7 to AlmaLinux 8/9/10 transitions Expertise in web hosting panels (cPanel, Plesk, DirectAdmin, Virtualmin) and cloud solutions (AWS EC2, Lightsail, DigitalOcean, Linode, Vultr, Google Cloud) Expertise in DNS integration for Shopify, Wix, Cloudflare, Google WorkSpace, Microsoft 365 DNS administration, including advanced configurations for SPF, DMARC, and DKIM PCI compliance management, server disaster recovery, and data restoration Website security, including hack cleanups and proactive hardening Tools and Technologies: LAMP stacks, DNS, and mail servers (Exim/Postfix) Backup solutions (R1Soft, rsync-based scripting) Server monitoring (Nagios) and optimization tools Security-focused tools like CSF and LFD If you're looking for a dedicated and detail-oriented Linux server administrator who can ensure your systems run smoothly and securely, let's collaborate to meet your technical goals.

✔️Performance✔️Accessibility✔️SEO, AEO & GEO Schema✔️Best Practices ✔️ Agentic Browsing✔️ GTmetrix ✔️WCAG 2.2✔️ Crux data Monitor - I clean & redo the website based on native coding for a permanent result. (Gutenberg, FSE block & Vanilla Js) 🕒14+ hrs online Tech: AI Agent |Shopify | WordPress | Lovable| Ycode | HubSpot | Webflow | Breakdance| Gutenberg | Elementor | Cloudflare | PHP | Laravel | HTML | Magento | Squarespace | BigCommerce | Codeigniter | Static | Headless | Next.js | React.js | Custom-built stack My Execution Strategy for Speed Optimisation 1. Initial Audit & Benchmarking the current report - Google PageSpeed Insights 2. Identify bottlenecks in Speed Index parameters - FCP, LCP, TBT, SI, and CLS 3. If CMS allow staging, create staging and perform all techniques - code minification, critical/used css, lazy-load, defer, font optimization and reduce on initial page weight 4. Server and CDN cache integrations My plan of execution for Core Web Vitals fixes 1. All steps of the above Speed optimization will be performed 2. I will ensure we get the LCP 2.5 sec and CLS green 3. Modify CDN integration as per need, also suggest the best server initial response time with avoiding downtime 4. Submission of pages for validation in Google Search Console. Note: It passed pages that report gets fetched and updated at GSC. For less traffic-based pages or having slow server response, it usually fails and will have to resubmit those again. I prefer to monitor it and boost the failing URLs if there is any room for improvement. A lot of CMSs have their own CDN and server control, and they do not allow CDN integration. 📍 Ping me, and I will ensure your website is performing at its peak performance 📍 To ensure great results on Google Core Web Vitals, I will share the plan of execution including page weight reduction as cleaning of unrequired elements, identification of errors and providing resolutions for all parameters (LCP, CLS, INP). I have done it for 1000s websites and will make sure your website will achieve those great results. Having 12+ years of core expertise in Website development and being a Page Speed Optimization Expert (CMS or Custom), I am capable of speed optimising any stack-based website to its peak performance, including Server and CDN configuration. I deliver results per any tools such as: ✔️ Google Core Web Vitals (Google Pagespeed optimization) ✔️ Google Search Console fixes ✔️ Lighthouse ✔️ Page Speed Insight | Page Speed Optimization (pagespeed optimisation tool) ✔️ GT-Metrix (gtmetrix com) ✔️ web.dev (web dev/measure) ✔️ Pingdom (tools pingdom com) and many more. My services towards these website development technologies of the website: ✔️ E-commerce Page Speed Insight | Page Speed Optimization | core web vital ✔️ WordPress Page Speed Insight | Page Speed Optimization | core web vital ✔️ Shopify Page Speed Insight | Page Speed Optimization | core web vital ✔️ Webflow Page Speed Insight | Page Speed Optimization | core web vital ✔️ Laravel Page Speed Insight | Page Speed Optimization | core web vital ✔️ Magento Page Speed Insight | Page Speed Optimization | core web vital ✔️ PHP Page Speed Insight | Page Speed Optimization | core web vital

I am having 8+ years experience in Server Administrator & System Administrator And Network Administrator, wordpress. I have managed shared server,vps server, dedicated server, godaddy Hosting ,AWS Cloud Server,Digital Ocean Cloud Server,Google cloud, Alibaba cloud, DNS,Domain,SSL certificate,Plesk panel,Red-hat,CentOS,Ubuntu, G-suite setup AWS cost management and so on. I am AWS Certified Solutions Architect Associate Engineer And AWS Certified SysOps Administrator Engineer. In which i have managed following things:- EC2, LoadBalancer, RDS, Route53, S3 Bucket, Light-sail, SES, Work-mail setup, Snapshot, Volume, Auto Scaling, AMI, IAM Role, SSL Installation, Dedicated Server, Shared Server, Wordpress, Php, mysql, LAMP server etc. I have migrated Thousands of website shared hosting to cloud server aws. Skills:- DNS, Domain, Website Migration , SSl Installation of domain and subdomains, Installation of LAMP, Nodejs, NPM, JAVA, Ruby on Rails,Wordpress, php, Phpmyadmin, Mysql, Installation etc. 🕵 Malware Removal & Security Deep scan of WordPress files and database for malware, backdoors, and injections Manual removal of malicious code and infected files Clean hacked WordPress sites and restore functionality Remove phishing pages, Japanese keyword hacks, redirects, & spammy links 🔐 WordPress Hardening Install Maldet + ClamAV → scan for malware Setup & configure Wordfence Security Plugin Enable firewall (WAF) & brute-force protection Hide wp-admin & wp-login from bots & attackers Enable Cloudflare reCAPTCHA for login, registration & contact forms Disable XML-RPC & REST API (if not needed) 🌐 Cloudflare Security Setup Configure Cloudflare CDN + SSL Setup WAF (Web Application Firewall) rules Block bad bots & fake crawlers DDoS protection & rate-limiting rules Custom rules to stop brute-force attacks ⚙️ Server & Performance Security Secure file permissions & wp-config.php Regular backups & monitoring alerts Optimize server response & caching for faster load times My specialized areas are as follows. ◈ Server-related tasks ✅ Troubleshooting issues related to web servers (Apache, NGINX). ✅ Installation/renewal of SSL certificates. ✅ Troubleshooting Linux server-related issues. ✅ Configuration of LAMP/LEMP stack. ✅ Fixing 401, 403, 404, 502, and 503 HTTP errors. ✅ Configuration of Webmin, Virtualmin, WHM, WHMCS, Plesk, cpanel, directAdmin etc. ✅ Troubleshoot SSH access-related issues. ◈ WordPress websites ✅ Migration of WordPress websites from one hosting to another ✅ Troubleshooting WordPress website-related issues (Critical errors, outgoing emails not working, etc.). ✅ Set up SMTP email configurations. ✅ WordPress core, themes, and plugin updates. ✅ Payment gateway integrations. ◈ Email related configurations ✅ Google Workspace email set up. ✅ SMTP configurations for different web applications. ✅ Configuration of third-party SMTP providers such as AWS SES, SendGrid. ◈ DNS related tasks ✅ Configuring DNS (adding/modifying DNS records, updating nameservers) in different domain providers (GoDaddy, Namecheap, Google Domains, Bluehost, DreamHost, etc). ◈ Websites/Web application development ✅ Fix errors related to websites/web applications built using HTML, CSS, JavaScript, PHP, and MySQL. ✅ Build web applications using the PHP Laravel framework. ✅ Development of backend APIs using Java Spring Boot framework. ✅ Third party API integrations. ✅ Wordpress ◈ Infrastructure management in different Cloud Computing Platforms ✅ Amazon Web Services (AWS) ✅ DigitalOcean ✅ Google Cloud Platform (GCP) ✅ Vultr ✅Contabo ✅ionos ✅ Alibaba ✅ hawai cloud If you're looking for a dedicated and experienced developer/server admin who can deliver high-quality code and drive successful project outcomes, I'd love to chat with you. Let's work together to turn your vision into reality!

🚀 Senior Full Stack Developer | React · Next.js · Node.js · TypeScript · SaaS & AI Apps Hi, I'm Vatsal — a Full Stack Developer who helps startups and founders turn ideas into fast, scalable, production-ready web applications. I specialize in SaaS platforms and AI-powered apps, owning the full stack from frontend to backend, database, and deployment. What I build: -SaaS Platforms — multi-tenant architecture, subscription billing, role-based access, admin dashboards -AI-Powered Apps — OpenAI integrations, chatbots, intelligent automation -Full Stack Web Apps — React/Next.js frontends with Node.js, Express & NestJS backends -APIs & Integrations — REST, GraphQL, third-party services, payment gateways -Performance & Scaling — optimizing slow apps, refactoring, fixing what's broken Tech Stack: -Frontend → React, Next.js, TypeScript, Tailwind CSS -Backend → Node.js, Express.js, NestJS, REST & GraphQL -Database → PostgreSQL, MongoDB, Supabase -Cloud → AWS, Vercel, Docker -AI → OpenAI API, automation workflows Why founders choose me: ✔ Full ownership — frontend, backend, database, deployment ✔ Clean, scalable, maintainable code ✔ Clear communication & on-time delivery ✔ Long-term support after launch I treat your product like a business, not a ticket. Whether you're launching an MVP, scaling an existing app, or fixing something broken, I'll take it from first line of code to deployment. 📩 Send me a message or invite me — I respond quickly. ✅ Keywords: Full Stack Developer | Senior Full Stack Developer | SaaS Platform Developer | MERN Stack Developer | React.js Development | Next.js Development | Node.js Backend Development | TypeScript Applications | API Integration Specialist | Supabase Developer | PostgreSQL Developer | MongoDB Developer | JavaScript Expert | Dashboard & Admin Panel | Marketplace Developer | Internal Tools | Booking Systems | eCommerce Solutions | Performance Optimization | Ongoing Product Support

Availability: Full-time freelancer, 𝟰𝟬+ hours/week, open to long-term collaborations. I’m a Full-Stack & AI Engineer with 10+ years of experience building web and mobile applications and 3+ years of specialized experience in AI and Large Language Models (LLMs). I design, develop, and deploy production-grade platforms, from scalable SaaS dashboards to AI-powered assistants, RAG systems, and voice agents. I work end-to-end: architecture → backend → frontend → cloud deployment, with a focus on clean code, maintainable systems, and high performance. Over the past few years, I’ve delivered solutions that integrate AI/LLM pipelines, vector search, real-time chat, and voice agents for enterprise and startup clients. 🤖 AI & LLM Expertise - MCP Server Development: Designing and integrating custom MCP servers for AI agents, enabling structured tool usage, external system integrations, database querying, and API orchestration. - Fine-Tuning: Persona creation, Q&A systems, and domain-specific models (medical, legal) using Mistral and Llama 3. - Synthetic Dataset Generation: Streamlining LLM training with high-quality datasets. - Evaluation Frameworks: Assessing LLM performance with custom metrics. - Cloud Deployment: Deploying LLMs on AWS and GCP. - AI Agents & Voice Bots: Proficient with LiveKit, Retail AI, OpenAI. - Open-Source Deployment: Expertise deploying models like vLLM on AWS/GCP/RunPod using SkyPilot. 🛠️ 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗧𝗼𝗼𝗹𝘀 & 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀 ➜ LLM Tools: LangChain, Langsmith, Langfuse , Hugging Face, Transformers. ➜ Vector Databases: Chroma, FAISS, Pinecone, Qdrant , Opensearch ➜ AI Workflows: Flowise AI, LangFlow, StackAI. 🛠️ 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 ➜ Languages & Frameworks: Python, Node.js, ReactJS. ➜ Database Management: MongoDB, MySQL, PostgreSQL , Supabase , FIrebase ➜ Frontend & Backend Integration: Seamlessly connecting APIs and user interfaces. 🌟 𝗔𝗱𝘃𝗮𝗻𝗰𝗲𝗱 𝗦𝗸𝗶𝗹𝗹𝘀 ➜ Open-Source LLMs: Proficiency in LLAMA 3, Mistral 7B, and Mixtral 8x7B. ➜ Prompt Engineering: Expertise in techniques like Chain of Thought, Few-shot Prompting, and Self-Reflection. ➜ Fast Inference: Implementing high-speed solutions with vLLM . 🌟 𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲? With over 10 years of experience, I deliver scalable, cutting-edge solutions tailored to your project’s needs. Whether it's advanced AI models, MCP server development, LLM optimization, or full-stack development, I ensure top-notch results every time. Let’s collaborate to bring your ideas to life!