I build mobile apps that thousands of people actually use. React Native, Flutter, and modern backends for iOS and Android. 10+ years in, 6,500+ hours on Upwork, 100% Job Success, Top Rated. Whether you're launching an MVP or scaling an app that's outgrowing its codebase, I take it from idea to the App Store and Google Play. What I build: - Cross-platform apps on React Native and Flutter - AI-integrated mobile experiences (chat, vision, personalization) using Azure OpenAI and LLM APIs - Marketplace, on-demand, and booking apps - Firebase and Supabase backends - MVPs built fast, structured to scale Tech: React Native, Flutter, iOS, Android, Firebase, Node.js, .NET, AWS, MongoDB, PostgreSQL, TypeScript. Common problems I solve: • Need to launch quickly → I build production-ready MVPs fast • Poor app performance → I optimize speed and stability • Outdated UI/UX → I create modern, user-friendly mobile experiences • Scaling challenges → I build apps designed for growth Send me your app idea and I'll come back with a clear build roadmap.

Hi, 👋 I'm a Full-Stack Developer specializing in modern web applications, mobile apps, and AI-powered solutions that help businesses launch faster, scale efficiently, and deliver exceptional user experiences. Over the years, I've partnered with startups, agencies, and growing companies to build production-ready applications across iOS, Android, and the web, from MVPs and SaaS platforms to enterprise-grade systems and AI integrations. Whether you need a mobile app, a scalable web platform, backend architecture, or intelligent automation, I can take your project from concept to deployment. 🔧 What I Can Do for You: • Build high-performance mobile apps using React Native, Flutter, Swift, and Kotlin • Develop responsive, scalable web applications using React.js, Next.js, and Vue.js • Create secure and robust backends with Node.js, FastAPI, Django, Laravel, Firebase, and Supabase • Integrate APIs, real-time features, payment systems, and push notifications • Implement AI-powered features like chatbots, automation tools, and intelligent dashboards • Deploy and maintain apps on App Store, Google Play, and cloud platforms 🚀 Tech Stack Highlights: Frontend: React.js, Next.js, Vue.js, Tailwind CSS, JavaScript, TypeScript Backend: Node.js, PHP, Python, Firebase, Supabase Mobile: iOS (Swift), Android (Kotlin/Java), Expo, React Native, Flutter Database: MongoDB, PostgreSQL, MySQL Tools: Git, GitHub, Postman, Docker, Xcode, Android Studio, Cursor, Claude DevOps & Deployment: CI/CD, AWS, Vercel, Netlify, Heroku, Fastlane 💡 Why Work With Me? ✅ Clean, maintainable, and scalable code ✅ AI-accelerated development for faster delivery ✅ Strong problem-solving and system design skills ✅ Clear communication and reliable collaboration ✅ On-time delivery with attention to detail ✅ Fully customized solutions aligned with your business goals Let’s collaborate and bring your project vision to life! Feel free to reach out. I’m happy to discuss your idea, even if you're just getting started.

Are you looking for a developer who understands both business logic and scalable architecture — not just someone who writes code? I help startups and growing businesses design and build secure, high-performance web, SaaS, and desktop applications that are built to scale. With over 10 years of full-stack development experience, I specialize in combining modern front-end technologies with powerful backend systems to deliver complete, production-ready solutions. Here’s what I can do for your project: Front End (Modern & Responsive UI): ✔ Angular (2+), TypeScript, RxJS ✔ Angular Material, Bootstrap ✔ Clean, responsive, user-friendly interfaces ✔ Performance-optimized SPA applications Back-End Development (Secure & Scalable APIs) ✔ ASP.NET Core, .NET 6/7/8, C#, Web API ✔ Python (Django/FastAPI) ✔ Node.js (Express/NestJS) ✔ RESTful API development ✔ Authentication & Authorization (JWT, Role-based access) Desktop Applications ✔ WPF & WinForms ✔ Modernization of legacy desktop apps ✔ Business automation systems Databases & Integrations ✔ SQL Server, MySQL ✔ Entity Framework Core ✔ Payment Integrations (Stripe) ✔ Accounting Integrations (QuickBooks Online) ✔ Third-party APIs I have successfully delivered projects across healthcare platforms, Financial & accounting systems, HR & payroll platforms, E-commerce applications, and Enterprise SaaS products. Why Clients Hire Me: ✔ 10+ years of real-world development experience ✔ Strong architecture & problem-solving mindset ✔ Clean, maintainable, and scalable code ✔ Clear communication & regular updates ✔ Reliable delivery on time and within scop I work closely with clients to understand their goals, communicate clearly, and ensure projects are delivered on time, within budget, and beyond expectations. Let's bring your 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 to life! 𝐈𝐍𝐕𝐈𝐓𝐄 OR 𝐌𝐄𝐒𝐒𝐀𝐆𝐄 𝐦𝐞, and We can discuss your 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 𝐫𝐞𝐪𝐮𝐢𝐫𝐞𝐦𝐞𝐧𝐭𝐬 and move forward 𝐚𝐜𝐜𝐨𝐫𝐝𝐢𝐧𝐠𝐥𝐲.

Python Ecosystem: NumPy, Pandas, Scikit-learn, Matplotlib, Seaborn, OpenCV, BeautifulSoup, FastAPI, Flask, Django Deep Learning Frameworks PyTorch, TensorFlow, Keras, Hugging Face, Transformer-based architectures Practical AI Applications Natural Language Processing, Computer Vision, Recommendation Engines, Time-Series Forecasting, Predictive Analytics Model Development & Optimization Fine-tuning large models using LoRA / QLoRA, PEFT methods, transfer learning, and custom dataset training 🧩AI & LLM Integration OpenAI models (ChatGPT, GPT-3.5, GPT-4), DALL·E, Whisper, and autonomous AI agents using LangChain, CrewAI, AutoGen, and similar frameworks 🧩 Large Language Models & Retrieval Systems Prompt Design & Optimization Few-shot prompting, reasoning chains, self-correction techniques, and advanced prompt tuning Retrieval-Augmented Generation (RAG) Vector databases including Pinecone, FAISS, Chroma, Qdrant, and Weaviate LLM Pipelines & Orchestration Semantic search, document indexing, embedding workflows, and scalable AI pipelines ⚙️ Backend, Full-Stack & System Architecture Server-Side Engineering Python (FastAPI, Flask, Django), Node.js, Spring Boot, REST APIs, microservice architectures Frontend & Client Applications React.js, Next.js, and iOS-based interfaces System Design & Scalability High-availability systems, real-time processing, performance-optimized backends Cloud & DevOps AWS, Google Cloud, Azure, Docker, Kubernetes, CI/CD automation, serverless solutions 🤖 Generative AI, Automation & OpenAI Solutions OpenAI & LLM APIs Embeddings, fine-tuned models, AI-powered tools and services Generative AI Use Cases Custom conversational bots, speech-to-text, text-to-speech, and intelligent workflow automation Automation & Intelligent Scripts Python-driven data pipelines, API integrations, and AI-based automation logic 🧩 Platforms, Tools & Integrations Workflow & Automation Tools Zapier, Make (Integromat), n8n, Google Sheets, Synthflow CRM & Business Systems HubSpot, Pipedrive, Zoho, GoHighLevel, Monday.com, ClickUp, Airtable Social & Data Automation PhantomBuster, Apify, Unipile AI & Prompt Platforms Anthropic, Afforai, Humata, DeepSeek, Relevance AI, Thoughtly, Vapi Email & Outreach Systems ActiveCampaign, Mailshake, Woodpecker, AWeber, Constant Contact Databases & No-Code Backends Airtable, Firebase, Knack 🧑‍💻 Software Solutions & Services • Custom enterprise applications • SaaS platform development • Progressive Web Apps (PWAs) • Online gaming platforms • Order and fulfillment systems • Project and task management tools • Sales automation solutions • eCommerce platforms • Microservices & REST APIs • Content Management Systems (CMS) • Learning Management Systems (LMS) • CRM & ERP solutions ✔ Project Execution & Delivery Projects are managed using Agile best practices, with structured sprints, continuous feedback loops, and transparent collaboration to ensure timely, high-quality delivery.

I am Parminder a passionate developer who lives and breathes Microsoft technologies and related frameworks. Coding isn't just a job for me; it's a genuine love and lifelong pursuit. I am always eager to take on new challenges and push the boundaries of what I can build. My areas of expertise include: Microsoft Technologies: ASP.NET, MVC, WinForms, WPF, Entity Framework, DDEX, Dapper, Spotify Front-End: AngularJS, React, HTML5, CSS3, Bootstrap 3, JavaScript, jQuery CMS & E-Commerce Platforms: NopCommerce, Umbraco, DNN, WordPress Mobile Development: Xamarin, Kotlin Cloud & Backend: Azure, AWS, Node.js Databases: MySQL, MongoDB, SQLite Other Technologies: Laravel, PHP, Spotify API integration, HIPAA I take pride in delivering clean, efficient, and scalable solutions. I work tirelessly to ensure complete satisfaction for every client. My approach is simple: quality work, open communication, and a results-driven mindset. I believe every project is a new challenge, and every challenge is a step toward success. Let’s build something great together! Cheers, Parminder Singh

Senior .NET Engineer with 11+ years of experience building FinTech platforms, payment systems, marketplace applications, and business automation solutions. My expertise spans the full software lifecycle—from architecture and backend development to cloud infrastructure and deployment. I specialize in C#, .NET, ASP.NET Core, Azure, SQL Server, Docker, React, distributed systems, and modern software architecture patterns. Over the years, I have built and maintained high-traffic platforms, payment gateways, wallet systems, trading and marketplace solutions, API integrations, and business process automation systems. I have extensive experience with microservices, CQRS, event-driven architectures, background processing, cloud-native applications, and performance optimization. I focus on building systems that are reliable, maintainable, and ready for long-term growth—not just delivering code that works today. Whether you need a new platform built from scratch, an existing system modernized, complex backend development, cloud architecture, or technical leadership for your project, I can help turn your requirements into a production-ready solution. Let's build something exceptional.

With 15+ years of experience and 300+ successful projects, I’ve delivered production-grade software for funded startups, agencies, and businesses across healthcare, finance, logistics, and e-commerce. 🚀 What I build: ➜ SaaS platforms (subscriptions, dashboards, admin panels, APIs) ➜ Custom CRMs (sales, operations, automation, integrations) ➜ Startup MVPs (fast launch, scalable architecture) ➜ Web apps (React, Node.js, Laravel) ➜ Mobile apps (Flutter, Android, iOS) What makes me different: I don’t just “code features.” I build systems that scale: ◆ Clean, maintainable architecture ◆ Secure APIs & databases ◆ Cloud-ready deployment ◆ Performance and stability from day one I have helped founders go from idea → MVP → real users → revenue without wasting months or budget on bad architecture. 🛠 Tech stack: React, Node.js, Flutter, PHP, Laravel, MySQL, PostgreSQL, Firebase, REST APIs, AWS, Stripe, Twilio, CRMs, third-party integrations and more. 🤝 How we work: - Clear milestones & timelines - Weekly progress updates - Clean, documented code - Long-term support if needed If you are building a SaaS, CRM or startup app and want someone who understands both technology and business, let’s talk.

SharePoint Developer | Power Automate | Power Apps | SPFx | Microsoft 365 I help businesses build SharePoint Online portals, intranets, document management systems, and automated workflows using Power Automate. I am a Microsoft Certified Power Platform Developer with 15+ years of experience in SharePoint, Power Automate, Power Apps, Microsoft 365, and Dynamics 365 CRM. I specialize in building practical Microsoft business solutions that replace manual Excel, email, and paper-based processes with scalable SharePoint and Power Platform solutions. What I can help you with: • SharePoint Online development and customization • SharePoint intranet, portal, list, library, and permission setup • Power Automate workflows for approvals, reminders, notifications, and automation • Power Apps development using SharePoint and Microsoft 365 data sources • SPFx web parts and SharePoint customizations • SharePoint document management and collaboration solutions • Microsoft 365 integration with Teams, Outlook, OneDrive, and Power Platform • Power BI dashboards and reporting • Dynamics 365 CRM integration and automation • Copilot-based productivity and automation use cases Typical solutions I deliver: • SharePoint intranet and employee portals • Approval workflows using Power Automate • Document management and tracking systems • Power Apps connected to SharePoint lists • Automated reminders, task assignments, and status updates • Migration from manual Excel/email processes to SharePoint and Power Platform • Dashboards and reports using Power BI Why clients choose me: • Microsoft Certified Power Platform Developer • 100% Job Success on Upwork • 50+ completed jobs and 12,000+ Upwork hours • Strong experience as a SharePoint Developer and Power Automate Developer • Clean, scalable, and maintainable solutions • Reliable communication and long-term support Skills: SharePoint Developer | Microsoft SharePoint | SharePoint Online | SharePoint Intranet | SharePoint Site | SPFx | Power Automate | Microsoft Power Automate | Power Apps | Microsoft Power Platform | Microsoft 365 | Office 365 | Power BI | Dataverse | Dynamics 365 CRM | Workflow Automation | API Integration If you need a reliable SharePoint Developer or Power Automate expert to build portals, automate workflows, or improve your Microsoft 365 environment, I can help you deliver it correctly and efficiently.

I am a .NET full stack developer and software architect with 8+ years of experience building scalable web applications using ASP.NET Core, Angular, C#, TypeScript, Microsoft SQL Server, Azure, and modern cloud technologies. Across 35+ projects in defence, renewable energy, fintech, e-commerce, and enterprise SaaS development I have delivered systems that handle real production load, not just demo traffic. What I build as a .NET full stack developer My deepest work is in ASP.NET Core back-end development. I spent years as the lead .NET full stack developer on a platform managing thousands of wind and solar energy installations globally, processing massive volumes of real-time data, building microservices on .NET Core and Azure, and reducing critical downtime incidents by over 40% through improved monitoring and analytics. On another project I built a Loan Origination System in ASP.NET Core that automated the entire loan lifecycle from lead capture to loan issuance, integrating with HubSpot, external CRMs, and RESTful APIs on Microsoft Azure. The client went from manual processing to a fully automated fintech pipeline handling 550+ active applications, cutting processing time by 60%. ASP.NET developer work across enterprise and defence Some of my most complex work as an ASP.NET developer has been in defence and industrial sectors. I modernized a legacy web platform for a company managing 36 high-uptime naval fleet assets, warships that cannot afford downtime. The ASP.NET MVC rebuild reduced manual reporting time by 70% and enabled real-time asset tracking, secure document storage, and streamlined access to sensitive operational data. On another engagement I took over a large workplace management SaaS development project built by a single developer who had left, no documentation, weekly outages, daily hotfixes. I stabilized the ASP.NET Core back-end, eliminated the performance bottlenecks, and reduced unplanned incidents from weekly to zero within two months. ASP.NET Zero and enterprise acceleration ASP.NET Zero is my go-to when enterprise clients need multi-tenancy, role-based permissions, and audit logging without spending the first three sprints on boilerplate. I have used it to accelerate SaaS development on projects in pharma automation, workplace management software, and industrial IoT, cutting initial setup time by 3+ weeks and letting the team focus on actual business logic from day one. On average my clients ship their first production release 30% faster on ASP.NET Zero compared to building from scratch. Full-stack web development across the whole system As a .NET full stack developer I own the entire delivery, ASP.NET Core back-end, Angular or React front-end with clean web design, Microsoft SQL Server and PostgreSQL database design, and Azure infrastructure. I built a Shopify fulfillment tool in ASP.NET Core and React that reduced packing mistakes to zero and cut order processing time by 35%, integrating barcode scanning, inventory management, and connections to 8+ shipping providers. I delivered a fleet management system in .NET Core and Angular handling 1,250+ assets and 845 active rentals simultaneously, with automated reporting that saved operations teams 10+ hours per week. On the front end I work with Angular, React, TypeScript, JavaScript, Next.js, HTML, CSS, Bootstrap, and RESTful API integration, connecting them cleanly to .NET back-ends without creating maintenance nightmares six months later. C# and .NET developer engineering that goes deep Back-end development across 8 years as a .NET developer means I have seen what breaks under real load. I cut a US e-commerce platform's page load time from 8 seconds to 2, directly contributing to a 2x increase in sales. I optimize Microsoft SQL Server and PostgreSQL queries, regularly reducing query execution times by 60-80%, design database schemas that support complex reporting, and build API integration layers connecting .NET systems to CRMs, ERPs, payment gateways, and third-party platforms. I work with Node.js for event-driven services, TypeScript to keep large codebases maintainable, and Python or PHP when projects need scripting layers alongside the core .NET stack. For web development infrastructure I use Microsoft Azure and Amazon Web Services, Docker containers, microservices architecture, and CI/CD pipelines that reduced deployment time by 50% for several enterprise clients. Why clients come back I have worked with clients in Germany, the USA, Australia, the UK, Norway, Denmark, and the Netherlands across renewable energy, defence, fintech, e-commerce, and industrial IoT. What stays the same: I ask the right questions before writing the first line of code, flag problems early, and deliver .NET full stack applications that work in production, not just in development. If you are scaling a SaaS product, modernizing a legacy system, or need a .NET full stack developer your team can build on, let us talk.

𝐄𝐱𝐩𝐞𝐫𝐭-𝐕𝐞𝐭𝐭𝐞𝐝: 𝐓𝐨𝐩 𝟏% 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤 I have been in the IT industry for more than 12 years. Currently, I am the CEO of Wetelo, Inc., a successful software development company. 🚀 𝐖𝐞 𝐁𝐮𝐢𝐥𝐝. 𝐘𝐨𝐮 𝐒𝐜𝐚𝐥𝐞. We help our partners grow by delivering tailored, full-cycle solutions — from idea validation to launch and beyond. 🏅 𝐑𝐞𝐜𝐨𝐠𝐧𝐢𝐳𝐞𝐝 𝐄𝐱𝐜𝐞𝐥𝐥𝐞𝐧𝐜𝐞 * 𝟑𝟎+ 𝟓-𝐬𝐭𝐚𝐫 𝐂𝐥𝐮𝐭𝐜𝐡 𝐫𝐞𝐯𝐢𝐞𝐰𝐬 * 𝐏𝐫𝐨𝐯𝐞𝐧 𝐒𝐮𝐜𝐜𝐞𝐬𝐬: Launched over 30 projects in the past year 𝐃𝐢𝐯𝐞𝐫𝐬𝐞 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐲 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 💹 FinTech 🔗 Web3 Solutions 🎥 Media and Entertainment 🏡 Real Estate 🌱 Sustainability 🩺 Healthcare 🏋️‍♂️ Fitness & Wellness 🚛 Logistics 🎮 IGaming 🌐 Internet of Things (IoT) 𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝘀: 💱 Cryptocurrency Exchanges (CEX) and Decentralized Exchanges (DEX) 🔱 Decentralized Finance (DeFi) Platforms 💼 Investment Management Software 📊 Financial Data Analytics Tools 📱 Decentralized Applications (DApps) 📹 Video Streaming Platforms 🏢 Real Estate Management Software 🌿 Carbon Footprint Tracking Apps ♻️ Renewable Energy Marketplaces ⚡️Renewable Energy Trading Platform 🗑️ Waste Management Solutions 📈 Healthcare Platforms 🏃 Fitness Tracking Apps 🚚 Transportation Management Systems (TMS) 📦 Warehouse Management Software (WMS) and Inventory Management Systems 🎲 Sports Betting Websites 📈 Betting Exchange Platforms 📱 Telegram Mini Apps 🎮 TON Games 📲 IoT Device Management Solutions 🧑‍💻 𝐓𝐞𝐜𝐡 𝐰𝐞 𝐥𝐨𝐯𝐞: 🔸 JavaScript, TypeScript, Next.js, Node.js, Nest.js, React, Express.js, Redux. React Native, three.js, 🔸Rust, Solidity, Web3.js 🔸PHP, Yii, Symfony, Laravel 🔸HTML5, CSS3 🔸 MySQL, PostgreSQL, MongoDB, JSON, XML, RESTful API 🔸 Git, Jira, Slack, Linux, AWS. Experience our comprehensive product development and outsourcing/outstaffing services driven by cutting-edge technologies. 🌟 Discover why our clients rave about us with our 𝐫𝐞𝐯𝐢𝐞𝐰𝐬. 🚀 Dive deep into our 𝐬𝐮𝐜𝐜𝐞𝐬𝐬 𝐬𝐭𝐨𝐫𝐢𝐞𝐬 and 𝐩𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 to witness our impact firsthand. 🤝 𝐇𝐢𝐫𝐞 𝐮𝐬 today to unlock unparalleled innovation and growth for your business.