Senior full-stack engineer building production SaaS platforms and AI-driven backends. .NET, C#, ASP.NET Core, Python, FastAPI, Node.js, Angular, React, TypeScript. 9+ years, Top Rated, 100% Job Success. Need a backend that ships and stays up, plus a frontend your users actually want to use? That is the work I do. I own the whole thing: architecture, REST and GraphQL APIs, multi-tenant data, payments, real-time, cloud, and CI/CD, including the reliability work most people skip. I build systems that hold under real load, not prototypes that break in week two. Systems I designed and built: RoverDent, a multi-tenant dental and healthcare SaaS. Nine .NET 8 microservices behind a React 18 dashboard, with Temporal running multi-day patient follow-up so call, SMS, email, and WhatsApp sequences never lose state. Two services are Python FastAPI: a LiveKit real-time voice AI agent, and a conversation API doing AWS Cognito RS256 token verification and WebSocket chat. Stripe and Twilio in production, HIPAA-aware audit trails, field-level isolation and RBAC across tenants. VisionONE, an enterprise ERP and payroll platform. .NET 8 with a dual-ORM strategy: EF Core for the domain model and Dapper for heavy accounting and ledger queries where read performance matters. Angular 20 frontend with NgRx and AG Grid Enterprise for data-dense payroll views. Real-money disbursement through Lipa Na M-Pesa STK Push with webhook callbacks and transaction-status polling, so payment state stays correct end to end. Hangfire for background salary runs, TOTP two-factor auth across multiple SQL Server databases. SmartStay, a multi-tenant hotel and property management SaaS. ASP.NET Core 8 on the ABP framework with an Angular 17 front end. Stripe and PayPal behind PCI-ready Azure infrastructure (VNet, WAF, NSG), SignalR pushing live room-status and reservation updates, GraphQL for flexible queries, Redis caching, and Power BI dashboards for managers. What I help clients build: Multi-tenant SaaS with RBAC, tenant isolation, and secure architecture REST and GraphQL APIs, microservices, CQRS, clean architecture Modern frontends: Angular (NgRx, AG Grid), React, TypeScript, responsive UIs Payments and billing: Stripe, PayPal, Authorize.Net, M-Pesa, webhook handling and signature verification Real-time features: SignalR, WebSockets, MQTT, event-driven backends AI and LLM integration: OpenAI, voice agents, automation with n8n and Temporal Cloud and DevOps: AWS, Azure, Docker, GitHub Actions, Azure DevOps, CI/CD pipelines Legacy modernization: .NET Framework to .NET 8 migrations, desktop to web Core stack: Backend: C#, ASP.NET Core, .NET 8/9, Python, FastAPI, Node.js Frontend: Angular, React, Next.js, TypeScript, Blazor, NgRx Data: PostgreSQL, SQL Server, Redis, Cosmos DB, EF Core, Dapper Cloud: AWS, Azure, Docker, CI/CD Integrations: Stripe, Twilio, SendGrid, WhatsApp, Shopify, OpenAI How I work: I learn a codebase deeply, communicate clearly about risk and tradeoffs, and give honest timelines with no surprises mid-project. I do my best work on long engagements where reliability matters and you want someone you can hand a hard problem to and trust it gets shipped. Tell me what you are trying to ship and your current stack. I will tell you straight whether I am the right fit and how I would start. Happy to do a quick call through Upwork.

👋 Hello! My name is Shahbaz Ali, and I'm a full-stack web developer (who works with BMW, and IBM Magna) with over 6+ years of experience building high-quality web applications for clients worldwide. I have a strong focus on delivering business value and creating great user experiences, and I'm known for my ability to deliver clean, scalable, and maintainable code. I have a diverse set of skills and experience, and I'm comfortable working with clients of any size - from startups and small teams to enterprise. I have a proven track record in industries such as automotive, eCommerce, retail, and fin-tech, and I'm always eager to learn and explore new opportunities. I have worked with different top organisations in the US, UK, and Australia. I have satisfied approximately all of my clients with my skill set. Furthermore, I won multiple national competitions and international competitions there I won incentives of more than 100k. I stood first in all competitions and awards, was Selected for the google challenge, won Dean Awards, Golden Batch on Hacker Rank, and solved different challenging problems in IT World. Here are some of the services I offer: 💻 Web application development: I have experience building web applications using a range of technologies, including React, Vue, Svelte, and more. I'm skilled in creating responsive and user-friendly interfaces, and I have a strong understanding of best practices for front-end development. 🔌 API development, integrations, and automations: I have experience building and integrating APIs using Node.js, Express, and other technologies. I'm skilled in creating APIs that are scalable, reliable, and easy to use. I also have experience with automating processes using tools like Zapier and IFTTT. 🌐 Frontend and backend development: As a full-stack developer, I have experience working on both the front-end and back-end of web applications. I'm skilled in using technologies such as React Native and Golang to build scalable and efficient applications. My tech stack includes the following: Front-end: ⚛️ React 🖥 Vue 💨 Svelte 🚀 Next.js 📦 Nuxt.js 🔂 Redux 📱 React Native 🔍 React Query 📜 TypeScript Back-end: ⚙️ Node.js 📦 Express 🚀 Golang Continuous deployment: 🐳 Docker 🌀 Kubernetes ⚓ Helm 🧪 ansible 🌩 AWS 🌪 GCP Visualization Tools and Libraries: 📊 plotly 📊 D3 📊 Tableau 📊 PowerBI 📊 Seaborn 📊 Matlibplot 📊 High-Chart 📊 D3, Plotly, Dash etc. Big Data Services: 🔥 Spark 🔥 DASK 🔥 MOUDIN 🔥 Airflow 🔥 Hadoop 🔥 Kafka 🔥 Storm 🔥 Cassandra etc. Databases: 🗂 Postgres 🗄 Mongo 🧑‍💼 CockroachDB 🗄 MySQL 🔥 Firebase Message brokers: 🔥 Kafka 🔌 NATS 🐇 RabbitMQ APIs: 💬 gRPC 🔗 REST 🔍 GraphQL I also have experience with patterns such as hexagonal architecture, CQRS, and event sourcing. Some key words that describe my skills and experience include: JavaScript, Kubernetes, DocuSign, no-code tools, integration, REST API, e-commerce, Shopify, Stripe, serverless, cloud functions, Sharetribe, and marketplace. Why choose me over other freelancers? - ⏰ Speed of work: In my development time, I've been able to produce sites with small deadlines. For example, I built out a complex 30+ page website in 7 days that was tablet and mobile responsive. - ✉️ Communication: Before I take on your project, I'll make sure to assess the project and clear up any questions. During your project, I will communicate frequently and do project check-ins so you can review any of my work. - 👍 Quality: I'll work till the end to ensure that your site is not just developed but will last the test of time. I'll utilize as minimal plugins as necessary and review each page on each type of responsive screen. I'm always interested in connecting with new people and exploring new opportunities. Feel free to reach out and let's get in touch!

👋 Hi, I'm 𝐌𝐮𝐤𝐞𝐬𝐡! 🌟 𝐑𝐞𝐚𝐜𝐭 & 𝐀𝐧𝐠𝐮𝐥𝐚𝐫 𝐄𝐱𝐩𝐞𝐫𝐭 | 8+ 𝐘𝐞𝐚𝐫𝐬 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞🔧 Specialize in 𝐜𝐫𝐚𝐟𝐭𝐢𝐧𝐠 𝐡𝐢𝐠𝐡-𝐪𝐮𝐚𝐥𝐢𝐭𝐲, 𝐫𝐞𝐬𝐩𝐨𝐧𝐬𝐢𝐯𝐞, 𝐚𝐧𝐝 𝐮𝐬𝐞𝐫-𝐟𝐫𝐢𝐞𝐧𝐝𝐥𝐲 𝐰𝐞𝐛 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 𝐮𝐬𝐢𝐧𝐠 𝐑𝐞𝐚𝐜𝐭 𝐚𝐧𝐝 𝐀𝐧𝐠𝐮𝐥𝐚𝐫. My expertise spans from developing intuitive single-page applications (SPAs) to building complex, data-driven platforms. I excel at transforming design concepts into fully functional, scalable solutions that enhance user experiences. With a deep understanding of JavaScript, TypeScript, and modern web technologies, I am dedicated to delivering clean, efficient, and maintainable code. Whether you're looking to build from scratch or revamp an existing system, I am committed to bringing your vision to life with precision and creativity. Let's collaborate to elevate your digital presence! --- 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 & 𝐒𝐤𝐢𝐥𝐥𝐬 𝐑𝐞𝐚𝐜𝐭: Hooks, Redux, Context API, JSX 𝐀𝐧𝐠𝐮𝐥𝐚𝐫: RxJS, NgRx, Angular CLI, Material Design 𝐋𝐚𝐧𝐠𝐮𝐚𝐠𝐞𝐬: JavaScript, TypeScript, HTML5, CSS3 𝐓𝐨𝐨𝐥𝐬 & 𝐋𝐢𝐛𝐫𝐚𝐫𝐢𝐞𝐬: Webpack, Babel, SASS, Bootstrap 𝐓𝐞𝐬𝐭𝐢𝐧𝐠: Jest, Jasmine, Karma 𝐕𝐞𝐫𝐬𝐢𝐨𝐧 𝐂𝐨𝐧𝐭𝐫𝐨𝐥: Git, GitHub --- 🚀 𝐖𝐡𝐚𝐭 𝐈 𝐎𝐟𝐟𝐞𝐫 𝐂𝐮𝐬𝐭𝐨𝐦 𝐖𝐞𝐛 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬: From concept to deployment 𝐑𝐞𝐬𝐩𝐨𝐧𝐬𝐢𝐯𝐞 𝐃𝐞𝐬𝐢𝐠𝐧: Ensuring seamless experiences across devices 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧: Speed, efficiency, and scalability --- 🌟 𝐍𝐨𝐭𝐚𝐛𝐥𝐞 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 𝟏.𝐄-𝐜𝐨𝐦𝐦𝐞𝐫𝐜𝐞 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦: Built a responsive, high-performance online store with React and Redux. 𝟐. 𝐀𝐝𝐦𝐢𝐧 𝐃𝐚𝐬𝐡𝐛𝐨𝐚𝐫𝐝: Developed a feature-rich dashboard using Angular and NgRx for state management. 𝟑. 𝐒𝐨𝐜𝐢𝐚𝐥 𝐍𝐞𝐭𝐰𝐨𝐫𝐤𝐢𝐧𝐠 𝐀𝐩𝐩: Implemented interactive features and real-time updates using React and WebSocket. --- 💬 𝐋𝐞𝐭'𝐬 𝐂𝐨𝐧𝐧𝐞𝐜𝐭! 𝐇𝐚𝐯𝐞 𝐚 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 𝐢𝐧 𝐦𝐢𝐧𝐝? Let's discuss how I can help bring your vision to life with clean, efficient, and maintainable code. 𝐐𝐮𝐞𝐬𝐭𝐢𝐨𝐧𝐬? I'm here to answer and offer suggestions!

I’m David, a full-stack developer with 3 years building Angular frontends and Node.js/Express backends that are fast, maintainable, and easy to extend. I’m comfortable owning features end-to-end: from shaping the technical plan to delivering a polished implementation. Recent win: Led a full Angular frontend rewrite for a client: moved to a proper reactive model (RxJS), trimmed payloads with lazy loading, and significantly reduced initial load while improving UX responsiveness. What I can help with: New feature development, API design/integration, UI performance refactors, dashboards/charts, and modernization of legacy Angular codebases. Available 30+ hrs/week and flexible to align with your schedule. If you have a roadmap or a legacy app that needs to move faster, I’m ready to help.

Your SaaS is breaking in production. Your AI chatbot gives wrong answers. Your web app works in the demo but crashes when real users hit it. I'm a full-stack developer — React, Node.js, Angular — who's spent 10+ years fixing exactly that, including at AutoLeap (5,000+ customers across North America) and CultureAI, an AI-powered SaaS I built and shipped solo. I build full-stack web apps and AI integrations that hold up when it matters most — not just when everything is running smoothly. What you get when you hire me: - Full-Stack MERN/MEAN — React, Angular, Node.js, MongoDB, PostgreSQL, TypeScript - AI Integration — OpenAI API, ChatGPT, custom chatbots, RAG on your own data - SaaS Platforms — dashboards, real-time features, Kanban, scheduling, auth - Payment Integration — Stripe, PayPal, subscriptions, webhooks - Clean, scalable code — built to hold up, not spaghetti you'll be paying someone to fix in 6 months.😆 So ask yourself: do you want the cheapest developer or the right one? Message me — what you're building, and I'll confirm scope & timeline upfront. On time. On budget. Clean handoff. Angular | React | Node.js | OpenAI API | ChatGPT | MERN | MEAN | SaaS | MVP | Shopify | Stripe

I help businesses fix, modernize, and scale their Angular apps. With 10+ years as a full-stack developer, I know how to quickly diagnose tough issues, untangle messy code, and upgrade Angular projects to the latest best practices. ✅ Need bug fixes or performance improvements? I can spot problems fast and deliver clean solutions. ✅ Stuck on an old version of Angular? I’ll modernize your app and bring it up to date. ✅ Starting fresh? I build responsive, user-friendly apps with Angular, Vue/Quasar, and reliable back-ends in Node.js/TypeScript or .NET. I also handle the full pipeline: secure APIs, AWS cloud hosting (EC2, Lambda, DynamoDB, S3, API Gateway), and CI/CD so your app is stable and scalable. Clients choose me because I fix problems quickly, communicate clearly, and deliver results that last. For samples of my work, please visit my GitHub profile.

13+ yrs of development experience | Flawless Coding | On Time | Quality Driven Delivery| Excellent Communication Skills | Round the Clock Availability | Product development | Leadership to drive results. I create business grade web / mobile app solutions and strive to deliver software of brilliant quality using the SOLID principles, TDD approach, agile methods for rapid iteration. ➤ What my Upwork client says: ========================== ✅ "Great work on our backend (API) nodejs application and working with the AWS infrastructure and Mobile apps (iOS and Android). Looking forward to working with Krish and SentientGeeks team in the future." ✅"The Value provided by Krish and his team is absolutely incredible. We selected them after interviewing several agencies for a high impact project. They have gone above and beyond to solve all the problems, great communication and sincerity to stick to deadlines and keeping project on track. Great technical skills, they delivered a high quality solution for mobile and web app, got the apps approved from iOS and google play." ➤ Why Me?: =========== ★ Besides my technical exposure, I believe in seamless communication. ★ Upwork Top Rated Plus Developer with a proven track record. ★ I deliver what I commit. I prefer to discuss the challenges/issues upfront. ★ quality care and understand the balance between quality and quantity. ★ 100% Project Success on Upwork ➤ Technical Exposure: =================== ✅ Asp.Net, Asp.Net Core, .Net MVC, ASP.NET Web API, C# ✅ Experience with the Microsoft Power Platform like, Microsoft Power Automate, Power BI. ✅ Frontend: Angular (TypeScript), React, ✅ Backend: Python, NodeJS, .NET Core (Web API). ✅ State Management: Redux, NgRx, MobX etc ✅ Database: MongoDB, Firebase, MYSQL, SQL Server, PostgreSQL, Oracle ✅ Unit Test: Jasmine/Mocha, Enzyme/Zest, XUnit, NUnit ✅ Cloud: AWS (S3 bucket, Lambda, Elastic Beanstalk, ACF, EC2, AWS RDS, etc.), GCP, Azure, Vercel. ✅DevOps: CI/CD Pipelines, Github Repos, Test Plan, Build Strategy, Artifacts with Python & Nuget Package feeds, etc. ✅ Source Control: Github, GitLab, Bitbucket, TFS ✅ Docker: Dockerized a couple of web applications using Jenkins & and Kubernetes. ✅ Principles: SOLID, DRY, KISS ✅ Third-Party API: SMS & IVR Gateways (Twilio, Esendex), Payment Gateways (PayPal, Stripe, Authorize.NET, Google Checkout), Chat API (WebRtc, Quickblox), Social Media (Facebook, Twitter, LinkedIn) ✅ AI Expertise: ============== ★Generative AI (e.g.GPT-3, ChatGPT, OpenAI) ★ Natural Language Processing & Text Analysis - chat-bots, text parsing and information extraction, full-text search, ★ Machine learning - object detection and recognition, classification, clustering, forecasting ★ AI backend development (FastAPI, Docker, Gunicorn) ★ Time Series Forecasting: site traffic forecasting, churn prediction, insurance value estimation ★ Machine Learning frameworks such as Tensorflow, PyTorch, Sklearn, and Spark MLlib ★ Design and build Machine Learning and AI models ★ Deploy trained models in Production environments ✅Our process includes: ==================== 1. Project Discovery: In this, we will schedule a call or chat session to understand the problem statement or the business/technology problem, you are trying to solve. We will provide you with free consulting and guide you on the requirement refinement, Business Model, Limitations, Ball-Bark Estimations, Our Project Development Methodology/Tools/Technologies, and Team, etc. 2. Technical Solution & Project Scope: Since now most of the requirement is captured, and we have an idea of what you are looking at. Based on our discussion, we will provide you with: ★ Detailed scope of work ★ Technical Details ★ Timeliness & Cost Breakdown ★ Project Milestones ★ Legal Agreement 3. Project Execution: Once the project is finalized and kickoff is done, we will start the project execution work using Agile/Scrum methodology. Our project execution steps include: ★ Wireframing & UI/UX Design Phase: As part of this process, our clients work with our award-winning UI/UX design team to bring the web/App concept to live. ★ Development (Coding) Phase: We share the regular web Links or builds for you to see the progress of your website and Mobile App projects. ★ Quality Assurance Phase: This includes UI/UX, Beta, and User Acceptance Testing. ★ Deployment and Maintenance: Once the app is live, we will provide you with free 30 Days of Maintenance within the scope. ✅Core Competency: =================== - Microsoft platforms -AI, ML solution -MERN Stack Developer -MEAN stack Developer -Hybrid App Developer -Web App Developer -Mobile App Developer -Cross-platform app Developer -iOS Developer -Android Developer -Firebase Developer -Python I trust this description provides clarity. Eagerly awaiting our discussion.

Full-stack web Developer with experience developing web applications using Angular, React, Node.js, Express.js, and NestJS. I have a 100% job success rate and a track record of delivering more to clients on the platform in short and long-term jobs. Although developing web applications has been and probably will still be my best skill for some time, I'm always keen to learn new technologies and improve my knowledge. I've developed many different types of systems and I'm sure we would do a great job together. I'm available to chat anytime if you would like to ask questions about my skills and/or your project. ✅ Languages: Javascript, Typescript, C#, Python ✅ Frontend: React, Next.js, Angular ✅ Backend: Node.js, Express.js, NestJS, .NET Core ✅ Databases: PostgreSQL, MySQL, MongoDB, Firebase Firestore

I’m a Full Stack Developer with 4+ years of experience in building modern web and mobile applications using Angular, React, Node.js, and PHP. I specialize in creating fast, secure, and scalable solutions — whether it's an e-commerce store, a mobile app using Ionic Framework, or a custom dashboard with complex API integrations. ✅ Technologies I love: Angular, React, Ionic, Node.js, PHP, WordPress ✅ Strong in UI/UX, responsiveness, and performance optimization

Full-Stack Developer | 9+ Years | .NET, Angular, React, Node.js | AI Agent Builder I've been building web applications for over 9 years now — everything from small business tools to large-scale enterprise platforms. I work across the full stack, so whether you need a polished frontend, a solid backend, or both wired together end-to-end, I can handle it. Most of my work revolves around .NET Core and JavaScript/TypeScript ecosystems (Angular, React, Node.js), but I'm not the kind of developer who sticks to one hammer. I pick what fits your project, not the other way around. Beyond traditional development, I build custom AI agents and integrate AI capabilities directly into applications — think smarter workflows, automated decision-making, and intelligent features that actually solve real problems. Not buzzword stuff. Practical AI that makes your product better. ━━━━━━━━━━━━━━━━━━━━━━ 🖥️ Frontend Angular (AngularJS through v21) · React · TypeScript · JavaScript · HTML5/CSS3 · Bootstrap ⚙️ Backend ASP.NET Core · Node.js (Express / NestJS / Feathers) · ADO.NET · Java 🤖 AI & Automation Custom AI Agent Development · AI Integration into Existing Apps · Intelligent Workflow Automation 🗄️ Databases PostgreSQL · MySQL · MSSQL · MongoDB · Redis ☁️ Cloud & DevOps AWS · Docker · GoCD · Vagrant 🛠️ Tools & Platforms GitHub · GitLab · Bitbucket · JIRA · Trello · Salesforce ━━━━━━━━━━━━━━━━━━━━━━ ✅ Clear communication — no jargon dumps, no disappearing acts. ✅ Realistic timelines — if something takes two weeks, I won't say five days. ✅ Battle-tested process — 9+ years means I know where things go sideways, and I plan around it. ✅ Product mindset — I treat your project like a product, not a ticket. ━━━━━━━━━━━━━━━━━━━━━━ Whether you're starting from scratch, scaling something that already works, or need AI baked into your product — drop me a message. Happy to talk through your idea before you commit to anything. 📩 Let's build something great together.