Whether you need to revive a legacy system without breaking its core logic or build it from scratch, and it has to be stable under tough conditions, I provide the technical reliability your project requires. Clients come to me when they need software that “just works” in demanding scenarios: industrial control, fleet/corporate tracking, self-service kiosks, field sales tools, or data-heavy enterprise sync. I prioritize solutions that reduce operational headaches, improve user experience, and scale without constant fixes. I write code designed to be maintained by others. My goal is for your team to be able to take over the project in the future without having to decipher complex logic or deal with accumulated technical debt. If you have a system causing operational friction or a project that requires a stable foundation from day one, feel free to reach out. We can discuss your current architecture and determine the most efficient path to stabilize or scale your solution. ===What I can do for you=== * Modernize old Android or desktop applications: migrate code to modern languages and architectures, improve performance, add offline support, handle complex local storage with safe migrations, and make synchronization with backends more robust and fault-tolerant. * Build responsive, hardware-connected apps: implement asynchronous communication, custom UI components for touch or specialized interfaces, background services (location, monitoring, telemetry), power-efficient processing, and permissions handling across Android versions. * Create reliable integration middleware or connectors: design asynchronous layers for heavy data transfers between local databases, APIs, or accounting/enterprise systems, with strong validation, logging, error recovery, and minimal downtime. * Ensure apps stay responsive and safe: use multi-threading, coroutines/Flow/reactive patterns, state machines, and safeguards to prevent crashes, race conditions, or hardware issues—even during intensive I/O, real-time updates, or long-running operations. === Technical Toolkit === * Languages: Kotlin, C#, Java * Android: Jetpack Compose, Coroutines, Flow, Room, Koin/Hilt, WorkManager. * Desktop: JavaFX, Swing, WPF, Avalonia. * Architecture & Patterns: SOLID, MVVM, Reactive Programming, Concurrency, Asynchronous I/O. * Integrations: Serial Communication (CNC/HID), SOAP/REST, SQLite, SQL Server, ERP Connectors.

🌟 Top Rated Plus Freelancer | Full-Stack Developer | Web & Mobile App Expert 🌟 Greetings! I'm Usama, a seasoned programmer specializing in web and mobile app development for Android and iOS platforms, along with expertise in Windows services and desktop utilities. With a strong background in C#.NET, ASP.NET MVC,.NET Core, Xamarin, Blazor, and.NET MAUI, I bring over 6 years of hands-on experience to the table. My expertise includes: Developing responsive web applications with Blazor and ASP.NET for a modern user experience. Creating cross-platform mobile applications using Xamarin,.NET MAUI for Android and iOS, and ASP.NET Core Web API. Designing and implementing Windows services for background tasks and automation. Developing desktop utilities using WinForm C# for various purposes such as data management, reporting, and more. Efficiently managing databases with Microsoft SQL Server and MySQL for seamless data handling. Here's why clients love working with me: a proven track record of delivering high-quality solutions on time. Expertise in OOP, MVC, API integration, and responsive design for web and mobile applications. Fluent in English, Urdu, and Hindi for seamless communication. Let's collaborate to bring your ideas to life and achieve success together. Feel free to explore my profile and check out feedback from satisfied clients. I look forward to the opportunity to work with you! Warm regards, Usama

💼 I'm a seasoned .NET desktop developer with over 15 years of experience crafting rich applications in WPF, WinForms, and Windows Services using C#, MVVM, and clean architectural patterns. I deliver high-performance, maintainable solutions with elegant UIs and scalable backends — tailored to your specific business needs. 💡 What I Offer 🎯 Custom WPF Applications with elegant UI and responsive design 🎯 MVVM Implementation with Caliburn.Micro for clear separation of concerns 🎯 Dynamic UI Design with XAML & C# — no drag-and-drop shortcuts 🎯 WinForms Solutions for rapid tool development and legacy modernization 🎯 Advanced Validation using IDataErrorInfo, DataAnnotations, and observable bindings 🎯 Windows Services Development for background automation, scheduling, and integration 🎯 Smooth Integration of DevExpress & Telerik for enhanced user experience 🎯 Service Hosting & Scheduling with WCF, REST APIs, Quartz.NET & MSMQ 🎯 Code Refactoring & Optimization for maintainability and performance 🎯 Deployment Expertise including ClickOnce, MSI installers, service auto-start & registry setup 🧰 Tech Stack Snapshot 🧠 UI/UX: WPF, XAML, WinForms, DevExpress, Telerik 🧠 Architecture: MVVM, Factory Pattern, Event-driven Windows Services 🧠 Validation: IDataErrorInfo, DataAnnotations 🧠 Services: Windows Service, Quartz.NET, Task Scheduler, MSMQ 🧠 Communication: WCF, REST API, SOAP 🧠 Backend: Entity Framework, SQL Server 🧠 Deployment: ClickOnce, MSI, Windows Installer, Scheduled Task Integration ✅ Why Clients Choose Me 🔧15+ years in .NET with deep WPF & WinForms specialization 🔧 Experienced in service-based architecture and background automation 🔧 Passion for clean, modular code guided by SOLID principles 🔧 Clear, Transparent communication supported by live demos 🔧 Reliable, detail-oriented partner offering long-term support

Turning messy data into decisions you can act on — Data Engineering, Reporting, Data Analytics, & Data Visualisation - 15+ years. I help companies stop guessing and start deciding with data. Over 15 years, I've built data pipelines, warehouses, and dashboards for teams at BCG, Netflix, Google, Pepsi, H&M, and Airbnb — cutting reporting time from days to minutes and surfacing insights that directly moved revenue and cost numbers. What I bring: 🔹 Top 0.01% Expert-Vetted talent on Upwork 🔹 500+ projects delivered, 20,000+ hours on Upwork, $500K+ earned — with a track record of long-term client relationships, not one-off gigs Where I add value: 🔹 Data Engineering & Pipelines — dbt, Airflow, Fivetran, Hevo Data, Python — building reliable, well-documented data models that your team can actually trust 🔹 SQL & Data Warehousing — PostgreSQL, MySQL, MSSQL, Oracle, Redshift, Snowflake, BigQuery, Azure — from schema design to query optimisation at scale 🔹 Dashboards & BI — Tableau, Power BI (DAX & Power Query), Looker, Looker Studio, QuickSight, Metabase, Superset, Grafana — dashboards built for decisions, not decoration 🔹 Reporting & Analytics — GA4, Shopify & e-commerce reporting, growth metrics, KPI frameworks, Retool, Domo, Airtable 🔹 Cloud — AWS, GCP, Azure I work best with teams who have a real business question — a cost that's too high, a metric that's unclear, a report that takes too long to build — and want it solved properly, not just patched. Send me your requirements, and let's figure out the fastest path to a clean, reliable answer.

🔥 TOP RATED PLUS | Fast Response | Full Stack Developer — MERN, Drupal & WordPress Hi! I’m Chandan, a seasoned Full Stack Developer with 15+ years of experience delivering powerful, secure, and scalable web solutions. Over the years, I have delivered 150+ successful Drupal projects for global clients, and I’m now actively helping businesses modernize with Node.js, React.js, Express, and MongoDB — the full MERN stack. ✅ What I bring to the table: • MERN Stack: Custom API development with Node.js & Express, dynamic, high-performance React.js front ends, and robust MongoDB backends. • Headless & Hybrid Solutions: Integrating React.js and Vue.js with Headless Drupal for modern, API-driven applications. • Drupal Mastery: Custom module development, performance optimization, multilingual setups, complex site building with Drupal 8/9/10, responsive theme design, security & upgrades. • WordPress: Full site builds, custom plugins, theme customization, maintenance, and migration. • DevOps & Workflow: Composer, Docker, Lando, Pantheon, Acquia, Platform.sh, Git, AWS, API integrations (e.g., Chargebee). • Front-end: Clean, mobile-first UI with React.js, TailwindCSS, Pattern Lab, HTML/CSS/SCSS, JavaScript/jQuery. ✅ Why clients work with me: Fast, clear communication — I reply quickly and keep you in the loop. Deep technical expertise across stacks — Drupal, WordPress, and MERN. Proven track record — delivering high-quality work, on time and on budget. I’m here to help you migrate, upgrade, or build from scratch — whether you need a modern React.js front end, a powerful Node.js backend API, a secure Drupal 10 upgrade, or a stunning WordPress site. Let’s talk about how I can help you build your next great digital product!

As a Top Rated freelancer on Upwork with over 10 years of experience, I specialize in delivering tailored, high-quality solutions that transform your ideas into reality. My clients appreciate not only the final product but also the efficient process and attention to detail I bring to every project. I have a proven track record of helping companies succeed by developing enterprise-level applications deployed on cloud platforms, optimizing database performance, and creating automated systems. With a focus on .NET Core, SQL, PHP, Flutter, AWS I help businesses automate, scale, and streamline their operations. Senior Full Stack Developer (MsSql | Mysql | PostgreSql | .NET | PHP | Flutter | AWS | Wordpress) Senior AI Developer | AI | LLM | NLP | ML | Generative AI | RAG | Agent ♛ Upwork Top Rated Developer with 10+ years of experience ♛ 10+ Enterprise web applications deployed on cloud services ♛ 100% Client Satisfaction & consistent best quality delivery ♛ Self-motivated, detailed-oriented, punctual, and fast learner ♛ Strong troubleshooting / debugging skills ♛ I will help you to turning your idea/concept into reality 🔑 Why choose me? 100% Client Satisfaction: I consistently exceed client expectations with top-quality delivery. Strong Problem-Solving Skills: I specialize in debugging, troubleshooting, and optimizing complex systems. Expert in Automation: Web data collection and custom automation systems are my forte. Quick Turnaround: My efficient approach ensures you get the best results faster. 💼 Areas of Expertise: Backend Development: ASP.NET, .NET Core 8.0, C#, REST APIs, DevExpress , JSON, PHP, WebSockets, API development and integration, Wordpress, Python, Laravel, .NET Core, ASP.NET MVC, ASP.NET Core MVC Frontend Development: JavaScript, jQuery, AJAX, Bootstrap ,Blazor, WebSockets, DevExpress Database: MSSQL, PostgreSQL, MySQL – stored procedures, query optimization Cloud Solutions: Google Cloud, Firebase – APIs, OAuth integration Automation: Selenium, FFMPEG, complex data collection Mobile: Flutter, .NET MAUI AI Integration: AI-driven solutions using OpenAI models like ChatGPT I’ve successfully helped clients reduce project timelines, improve operational efficiency, and build scalable systems—all while maintaining a strong client focus and open communication. 💰 Rates: Short-Term Projects: $80/hour Long-Term Collaboration (10-30 hours/week): $50/hour Open-Source Projects: $35/hour I’m a full-time freelancer with availability for 40+ hours per week. Let’s work together to make your next project a success!

I’m a senior software engineer with over 10 years of experience building scalable and reliable software solutions for startups and enterprises. If you need a dependable developer who can take ownership, think strategically, and deliver quality, maintainable solutions, I’d love to help. ►Key skills: ✅ Software Design & Architecture - Gathering and eliciting requirements, researching effective solutions, and modeling designs that can be built. (Writing user stories, requirements research, software requirement specifications documentation, strategic planning, and road mapping). ✅ Database Design & Management - ERD modeling, SQL/NoSQL schema design, query optimization, normalization, and vector DB integration. ✅ Back-end programming: TypeScript/JavaScript, Node, Python, PHP, Java, C++. ✅ DevOps - AWS, Azure, GCP, Docker, serverless, CI/CD pipelines, and shell scripting. ✅ Automations & Artificial intelligence - Experienced in AI & LLM integration (classification, extraction, matching, automation), vector databases and semantic search, AI-powered workflows and decision systems. Front-end experience: React and Vue. - I have been involved in developing automation, back-end logic, APIs, web and mobile UI components, Browser extensions, and deploying servers/cloud solutions. - I am resourceful in developing a complete MVP web/mobile application. - I have worked with industries ranging from manufacturing, e-commerce, fintech, social networks, AI, and more.

20 years experience as a full stack and DevOps developer. Have worked in everything from personal and business web design to complex web applications, healthcare/EMR, Big Data/MapReduce/machine learning/AI applications. Typescript/NodeJS/Fastify/Express, React, Vue, Angular, Ruby & Ruby on Rails, Python/Flask/Django, Rust, Golang, Angular, PHP, Perl, Elixir, Haskell, C, C++, C#, Wordpress, Joomla, Drupal, Docker, Kubernetes, nginx, lighttpd, Redis, memcached, Apache, Linux/BSD, PostgreSQL, MySQL, DynamoDB, SQLite, MongoDB, Elasticsearch/Kibana/Logstash/Grafana, Neo4j, DB2, Oracle, MSSQL, and others. AWS, Google Cloud Platform, Azure, DigitalOcean, Linode, Heroku, Vultr, Bluehost, HostGator, etc..

🔷 𝟏𝟎𝟎% 𝐉𝐨𝐛 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 | 🔷 𝟏0+ 𝐘𝐞𝐚𝐫𝐬 𝐎𝐟 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 | 🔷 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 𝐏𝐫𝐨𝐟𝐞𝐬𝐬𝐢𝐨𝐧𝐚𝐥 I help businesses build secure, high-performance .NET applications that scale. From backend architecture to modern frontends, I deliver reliable solutions that are built to last. With over 10+ years of experience as a Full Stack .NET Developer, I’ve worked on SaaS platforms, CMS systems, enterprise applications, and custom business tools. My focus is simple: build clean, scalable systems that solve real business problems — on time and without unnecessary complexity. 💡What I Bring to Your Project - Backend Development – C#, .NET Core, ASP.NET MVC, Web API, Microservices - Frontend Development – React.js, Angular, Next.js, Blazor - Databases – SQL Server, MySQL, AWS RDS - Cloud & DevOps – AWS, Azure - Legacy Modernization – Classic ASP, VB6 - Architecture – Scalable, secure, performance-optimized systems ✅ Why Clients Work With Me - Clear communication and structured development process - Strong focus on performance and maintainability - Full ownership from planning to deployment - Quick turnaround on MVPs and feature validation 📌 Next Step: If you’re looking for a senior developer who understands both business and technology, let’s discuss your project. I’m happy to provide a technical review and suggest the best approach before we begin.

✅ Built 50+ AI & Automation Systems across SaaS, CRM, and business operations ✅ Expert in AI Agents, Voice AI, and Workflow Automation (n8n, Zapier, Make/Integromat) ✅ Scaled systems handling real-time conversations, bookings, and lead qualification ✅ Deep experience in API integrations, payment systems, and AI-driven SaaS platforms ✅ Strong background in Google Apps Script, LLMs, and custom GPT solutions Work with an AI engineer who builds systems that actually grow your business. I help startups and growing companies design and launch AI-powered automation systems that reduce manual work, increase conversions, and scale operations. From AI agents handling conversations to fully automated backend workflows — I build systems that just work. Expertise 🔊 AI Voice & Communication Systems AI calling agents using VAPI, RetellAI, ElevenLabs AI receptionists, lead qualification bots, appointment setters Whatsapp & Telegram automation bots Real-time conversational AI with memory and context 🤖 AI Agents & LLM Systems Autonomous AI agents for sales, support, and operations Custom GPT solutions and LLM integrations RAG pipelines and knowledge-based AI systems Multi-step AI workflows with decision logic ⚙️ Automation & Integrations n8n, Zapier, Make (Integromat) advanced workflows GoHighLevel (GHL) automation and CRM systems Google Apps Script automation API integrations (Stripe, Twilio, CRMs, custom APIs) End-to-end business process automation 🚀 AI SaaS & System Development AI-driven SaaS platforms from MVP to scale Dashboard + backend automation systems Payment integrations and subscription systems Scalable architecture for high-growth products 🧩 Advanced AI Tooling OpenClaw, TinyClaw, NanoClaw, ZeroClaw, IronClaw, PicoClaw Custom internal AI tools and automation frameworks How I Help 🔨 Build from Scratch Turn your idea into a fully working AI product (MVP → Scale) ⚙️ Automate Your Business Replace manual work with smart AI workflows and integrations 📈 Increase Revenue with AI Lead qualification, follow-ups, and conversion systems 🔁 Optimize Existing Systems Fix, improve, and scale what you already have Why Clients Work With Me ✅ I think like a CTO — not just a developer ✅ Focused on business outcomes, not just code ✅ Fast execution with clean, scalable architecture ✅ Clear communication and realistic timelines ✅ Long-term partner for AI and automation growth If you're planning to build an AI product, automate your operations, or scale faster with AI — I can help you get there. Send me a message or invite me to your job, and let’s break down your idea into a real system