I am MongoDB SI certified DBA and Developer with 100% job success ratio. I have 10+ years of experience including MongoDB Atlas, Query optimisation, Index, Schema, MongoDB Cluster, DB Version Update, Sharding, replication, security, backup restore and query design.

I am a senior software engineer with 10+ years of experience delivering robust, high-performance solutions across Microsoft, Cadence, and Oracle. My core expertise spans C++ development, backend architecture, and scalable data systems. In my freelance work, I’ve recently built production-grade backends for fintech/crypto clients, including a Crypto Data API (FastAPI · Redis · PostgreSQL) that unified multiple providers (CoinGecko, CryptoQuant) into normalized endpoints. The system featured background workers, Redis caching for sub-200ms responses, Postgres persistence for analytics, and secure access controls with rate limiting and admin tooling. I specialize in: ---Modernizing legacy codebases (C++/backend refactoring). ---Designing high-throughput APIs with FastAPI/NestJS. ---Integrating distributed workflows with Kafka & real-time data. ---Building resilient storage layers in Postgres, MongoDB, and Redis. I work with precision, accountability, and a strong focus on reliability and scalability. Whether extending thick client applications, designing APIs, or integrating complex data pipelines, I ensure production-grade quality with minimal supervision. Typical Workflow: Requirement clarification → Architecture & planning → Incremental development → Regular demos/updates → Production-ready delivery. Skills Snapshot: Languages: C++ (11/14/17/20), Python, TypeScript Frameworks: FastAPI, NestJS, Qt, React Data: PostgreSQL, MongoDB, Redis, Kafka Cloud & Tools: Docker, GitHub Actions, DigitalOcean What You Get - Clean, well-structured code with documentation - Production-ready APIs and data pipelines - Transparent communication and regular updates - Focus on reliability, scalability, and maintainability - Iterative, collaborative approach that adapts as requirements evolve

Slow databases? Production outages? Performance bottlenecks affecting your business? I help organizations identify root causes, optimize database performance, and build reliable database platforms. I am a senior database administrator (DBA) with over 13 years of hands-on experience managing production database systems. I specialize in MySQL, MariaDB, PostgreSQL, MongoDB, Oracle , and SQL Server, providing database troubleshooting, incident response, daily operations and maintenance, performance optimization, and reliable backup, high availability, and disaster recovery solutions for mission-critical environments. 🔍 Database Expertise: With over 13 years as a senior expert in MySQL/MariaDB/Percona/PostgreSQL/MongoDB/Oracle/SQL Server/DuckDB, I’ve managed over 5000 databases and 300 TB+ of data. My experience covers database architecture, performance optimization, backup and recovery, High availability, disaster recovery, and much more. I ensure every database solution I deliver is robust, scalable, high performance, and perfectly aligned with your business needs. 🛠️ Technology Stack: MySQL/Percona (Versions 5-9) MariaDB (Versions 5-12): Installation、High Availability, Replication, and Scalability Solutions、InnoDB Cluster、Group Replication、Workbench/Shell/Router、Backup & Restore、Galera Cluster、Percona XtraDB Cluster、XtraBackup、Toolkit、InnoDB/MyISAM/Binlog、Orchestrator、replication-manager. PostgreSQL (Versions 7-18): Installation、High Availability, Replication, and Scalability Solutions、SQL Tuning、pgpool-II、PostGIS、TimescaleDB、ClickHouse、Patroni、Citus、pgvector、Security、Supabase、Neon. MongoDB (Versions 3-8) / MongoDB Atlas : Installation、MongoDB Shell (mongosh)、Aggregation、Indexes、Atlas、Time Series、Change Streams、Replication、Sharding、Storage、Administration、Security. SQL Server (Versions 6.5 – 2025): Installation、High Availability and Disaster Recovery (Always On AG, FCI, Log Shipping, Replication)、Distributed Availability Groups、SQL Server Management Studio / Azure Data Studio / sqlcmd、Backup & Restore、Failover Cluster / Always On Solutions、PowerShell dbatools / First Responder Kit、Storage Engine / Transaction Log / Change Data Capture. Other Database : Oracle、DB2、Redis、SQLite、DuckDB、DocumentDB Cloud service providers: AWS RDS、AWS Aurora、Amazon DocumentDB、GCP、Azure、N8N creator. Certifications: I hold certifications from Cisco, Oracle, MySQL, AWS, ITIL, PMP, and TOGAF, ensuring I bring industry-recognized expertise to every project. 📈 Why Choose Me? Proven Experience: Worked for leading ICT and IoT solution providers, supporting major operators, banking, and financial enterprises. End-to-End Solutions: From designing high availability architectures to delivering query optimizations and backup solutions, I offer complete database management expertise. Training & Support: I also provide course training for companies looking to empower their teams with database-related skills. 🤝 Let’s Collaborate: If you’re looking for a seasoned database professional to tackle challenges in MySQL, PostgreSQL, MongoDB, Oracle, or other database technologies, let’s discuss how I can help streamline your operations and enhance performance. 📩 Contact Me: I’m ready to dive into your project. Reach out, and let’s unlock the full potential of your data infrastructure together!

I am having expertise in developing applications in domains - B2B2C, Business automation, Real estate, Networking, Platform solutions etc. We use technology stacks like MEAN, LAMP/ Laravel, Wordpress and Mobile platforms - backed by extensive portfolio highlighting live projects from our clients worldwide. Our expertise lies in developing custom software solutions that are designed to help you retain your clients and streamlines your business processes. Experience in technology stack & services: 1. MEAN Stack: Node.JS, MongoDB, Express.JS, Angular.JS( Angular 2/4/5/6), React.JS, Ember.JS, Sails.JS, Redux. 2. LAMP Stack: CakePHP, MySQL, Wordpress, Jquery 3. Amazon Web Services - Amazon EC2, S3, SES, SNS, DynamoDB, CloudFront, Swagger, Load balancing, AWS Lambda services, serverless architecture, DC2, S3, EB. I am available to take up discussions on your project and help you develop complete roadmap of project development and align right team for development

Hello, I'm Jitendra Jangid! 👋 With an engineering degree in Computer Science and over 6 years of experience as a Full stack developer, I specialize in crafting high-performance web applications. My expertise lies in utilizing the latest technologies to deliver exceptional quality and timely results. Technologies & Skills 🌟 - Frontend: Angular (v7 to v15), React, TypeScript, NativeScript, Vue.js, HTML, CSS, Bootstrap, JavaScript - Backend: Node.js, Python, Laravel, PHP - Database: MongoDB - Cloud Services: AWS - Version Control: Git, GitHub, Bitbucket - Project Management: Jira, Asana Services I Offer 🔧 - Web App Development 🌐 - REST API Development 🔗 - Backend Architecture 🏗️ - API Creation & Implementation 🛠️ Web Services 🌍 - Frontend Development (Angular 15, HTML, CSS, Bootstrap, JavaScript, Vue.js) 💻 - Backend Development (Node, Python, Laravel, PHP) 🖥️ - Documentation (API, Code, Requirements) 📚 - Testing (Regression Testing) ✅ Project Experience 🚀 I've successfully delivered a variety of complex projects, including CRM systems, ERP solutions, HR management portals, and survey-based applications, among others. My commitment to quality and client satisfaction ensures that every project I undertake meets the highest standards. Why Choose Me? 🌟 I am passionate about delivering impactful web solutions that drive success and efficiency. If you're seeking a top-tier MEAN stack developer with a proven track record and a dedication to excellence, let's connect and bring your vision to life! Ready to get started? Reach out today, and let's discuss how we can achieve your goals together! Best regards, Jitendra Jangid

🏆 Top Rated Freelancer | 💯 100% Job Success Score | 💯 100% Client Satisfaction I help startups and businesses build scalable web applications, SaaS products, and custom business solutions that are designed for growth and long-term maintainability. Tech Stack : React.js,Next Js Node.js, Express.js MongoDB, PostgreSQL, MySQL Laravel, PHP Docker, Git, CI/CD, AWS What I can help you with: ✅ SaaS Product Development ✅ CRM & ERP Systems ✅ Custom Web Applications ✅ React.js Frontend Development ✅ Node.js Backend Development ✅ REST APIs & Third-Party Integrations ✅ Dashboard & Admin Panel Development ✅ Business Process Automation ✅ Marketplace & Directory Platforms ✅ Database Architecture & Optimization ✅ Performance & Scalability Improvements ✅ Ongoing Maintenance & Feature Development Why clients hire me: ⭐ Top Rated on Upwork ⭐ 100% Job Success Score ⭐ 6+ Years of Professional Experience ⭐ Clear Communication & Regular Updates ⭐ Clean, Scalable & Maintainable Code ⭐ Long-Term Partnership Mindset Whether you need an MVP, a full SaaS platform, a CRM system, or a custom web application, I can help turn your idea into a reliable product. Let's discuss your project. 🚀

I am a FULL STACK ENGINEER with strong experience in building scalable, cloud-based applications using ReactJs, NextJs, JavaScript, Python, Ruby, AWS, NodeJS, NestJS, MongoDB, Stripe, Twilio, OpenAI, iElevenLabs and more. Over the past few years, I have led the development of froentend & backend systems for web and mobile apps, including a social media platform MVP where I designed and implemented serverless architecture using AWS Lambda, API Gateway, S3, and DynamoDB. This allowed the platform to scale smoothly and stay cost-effective. My core strength lies in designing RESTful APIs, setting up database structures, and writing clean, efficient code that performs well even under high traffic. I regularly work with MongoDB and have a solid understanding of database design, indexing, and query optimization. I also have hands-on experience in authentication systems, role-based access control, and integrating third-party APIs. I enjoy solving complex problems and making backend systems faster, more secure, and easier to maintain. I’m comfortable working independently or with cross-functional teams, and I often collaborate with frontend developers to ensure the entire application works smoothly from end to end. While my main focus is backend, I also have experience with React, which helps me understand how backend and frontend connect. If you're looking for someone who can take ownership of the end to end development, set up reliable cloud infrastructure, and deliver robust and well-documented APIs — I’d love to help.

Hi, I’m Waqas Ahmad, a Full Stack Developer with over 4 years of experience building modern web and mobile applications using React, Next.js, Node.js, MongoDB, and AWS. I help startups, founders, and product teams design, build, and launch complete applications — from polished UIs to robust APIs and cloud infrastructure. -------------------------------------------------- 💼 What I Can Do for You: Full Stack Application Development Whether you're building a SaaS platform, internal dashboard, or custom tool — I handle everything end-to-end using Next.js, React, Node.js, Express, and MongoDB. ⦿ Frontend Development & UI Implementation - Pixel-perfect conversion of Figma designs to code - Clean, accessible UIs built with Tailwind CSS, Shadcn UI, Material UI, Chakra UI - Interactive experiences with Framer Motion, GSAP, or SVG/Canvas animations ⦿ Cross-Platform Mobile App Development - Using React Native and Expo, I build fast, smooth mobile apps with shared codebases, ready for both Android and iOS stores. ⦿ Backend & API Services - REST & GraphQL API development - Real-time systems using Socket.io or Firebase - Serverless APIs with AWS Lambda - Scalable NoSQL databases with MongoDB or Firebase ⦿ Payment Gateway Integrations - Integrate Stripe, PayPal, Razorpay & other providers - One-time, recurring subscriptions, or custom billing logic - Webhooks, invoice generation, and refund flows ⦿ Deployment & Hosting - Production-ready deployment with Vercel, Netlify, Render, Railway - Scalable backend & serverless setups on AWS EC2, Lambda, S3 - CI/CD workflows and custom domains ⦿ 3rd-Party & Cloud Integrations - Google Maps, Leaflet, Mapbox - OpenAI, Llama, Stable Diffusion - Any custom or private API ⦿ Automation & Utilities - Web scrapers, cron jobs, browser extensions - Custom CLI tools and scripting - Admin panels and analytics dashboards -------------------------------------------------- ⦿ Why Work With Me? - 4+ years of professional experience delivering real-world products - Electrical Engineering background — analytical thinking & system design - Proven experience across SaaS, mobile apps, e-commerce, AI apps, IoT tools, and more - Focused on problem solving, not just coding - Mix use of AI-powered dev tools and Human Experience to deliver up to 5x faster without compromising quality - Clean code, modular architecture, and fully documented deliverables Ready to launch your idea or scale your product? 📩 Let’s connect — message me today and let's discuss your project. Best regards, Waqas Ahmad

🔥 Full-Stack Web Developer | MERN & MEAN Expert | Top Rated | 30+ Projects Delivered Hi, I’m a Top Rated Full-Stack Web Developer with a proven track record of 30+ successfully delivered projects for clients worldwide. I specialize in building scalable, responsive, and SEO-friendly websites and applications using the MERN stack (MongoDB, Express.js, React.js, Node.js) and MEAN stack. What I Can Do for You: - Custom Web Development – From idea to launch, I turn your vision into a fully functional product. - UI/UX Implementation – Convert your PSD, Figma, or XD designs into pixel-perfect, responsive websites. - API Development & Integration – Build secure REST APIs and connect third-party services seamlessly. - Performance Optimization – Faster load times, clean architecture, and SEO-friendly structures for better rankings. - Bug Fixes & Updates – Resolve issues quickly and keep your platform running smoothly. - Ongoing Support – Maintenance, feature enhancements, and long-term collaboration. Why Clients Choose Me: ✔ Top Rated on Upwork with consistent client satisfaction ✔ 30+ completed projects across industries (healthcare, eCommerce, SaaS, and more) ✔ Hands-on experience with AWS & Azure deployments for scalable, secure solutions ✔ Mobile-first approach – websites that work flawlessly across all devices and browsers ✔ Competitive rate of $20/hr with no compromise on quality Let’s build not just a website, but a high-performing digital presence for your business. I’d love to discuss your project and help bring your ideas to life.

Greetings, I am Full Stack developer with over 13+ years of experience in writing multi-tenant, single tenant, SaaS offerings and SOA (service oriented architecture) application in domains ranging from eCommerce, accounting, consumer applications to Business Management applications. I have extensive experience in writing REST APIs, REST API documentation, Monolithic apps, and Database Administration. Some of my Technology Stack are below: NodeJS React Python FastAPI GraphQL PHP MYSQL Postgres MongoDB etc Feel free to invite me to discuss your project. -- best Javed Iqbal