Hire the Best Sabre Developers in Karachi, PK

🧩 About Me I’m a Full Stack .NET Developer and QuickBooks Integration Expert with extensive experience in building robust, high-performance web and desktop applications. I specialize in C#, .NET Core, ASP.NET MVC, and JavaScript frameworks (React, jQuery), combined with deep expertise in QuickBooks Desktop, Online, and POS integrations. ⚙️ What I Offer ✅ QuickBooks Integration & Custom Solutions 🔹Integrations with QuickBooks Desktop, Online, and POS (all versions) 🔹Sync external data sources with QuickBooks (databases, web apps, CRMs, etc.) 🔹Develop custom QuickBooks add-ins and utilities 🔹Web Connector, SDK, and REST API-based integrations 🔹Automated data import/export, invoice sync, and inventory management 🔹Integrations with SharePoint, Google Sheets APIs, Wix, Shopify, Salesforce, WooCommerce, and other third-party systems ✅ .NET Full Stack Development 🔹Web applications using ASP.NET MVC / .NET Core (6, 7, 8, 9) 🔹Backend services and RESTful APIs 🔹Database design and optimization (MS SQL, T-SQL, Dapper, Entity Framework) 🔹Responsive UI using HTML5, CSS, JavaScript, React, jQuery 🔹WinForms and WPF for desktop applications 🔹Integration with third-party APIs and payment gateways ✅ Other Services 🔹System analysis and architecture design 🔹Debugging, testing, and optimization 🔹Technical consulting for scalable software solutions 🧠 Skills Summary ✅ Languages & Frameworks: 🔹C#, 🔹VB.NET 🔹.NET Core, 🔹ASP.NET MVC 🔹Entity Framework 🔹 LINQ ✅ Frontend: 🔹React 🔹jQuery 🔹HTML5, 🔹CSS, 🔹JavaScript ✅ Database: 🔹SQL 🔹Server 🔹SQLite 🔹MySQL 🔹PostgreSQL ✅ QuickBooks: 🔹Desktop (SDK) 🔹Online (API) 🔹POS 🔹Web Connector ✅ Integrations: 🔹SharePoint 🔹Google Sheets 🔹Wix 🔹Shopify 🔹Salesforce 🔹WooCommerce 🔹Payment Gateways Integrations ✅ Other: 🔹REST APIs 🔹WinForms 🔹WPF 💡 Why Choose Me I take pride in delivering clean, maintainable, and performance-driven code. My goal is to help businesses integrate QuickBooks seamlessly or build full-stack .NET applications that solve real-world business problems. If you’re looking for a reliable and detail-oriented developer who understands both QuickBooks ecosystems and enterprise-level .NET development, let’s connect and bring your project to life.

Hi, Looking for Dotnet Core MVC, SQL Server, C#, Dotnet-based web application developer? Yeah, Welcome, you're at the spot. High-quality professional backend solutions developer with Back-end (Dotnet core and ASP.NET framework) and frontend (React.JS and Knockout). You will receive clean code with managed architecture. Experienced RESTful web API developer and able to provide solutions according to your requirements. Expert Full Stack developer having great experience In the Dotnet field and develop solutions. I am enthusiastic, dedicated, honest, punctual, and able to meet project deadlines on time. Why to choose Minhaj? I am Approx 10 years of experience in development and achieved many successes in highly challenging projects, including Following solutions • CRM • CMS • CMMS • E-Commerce • Hospitality Management System • Para-Medical System • Data Scrappers • And the list goes on… Be able to understand client requirements quickly, specifications for work, and delivering the job on time and budget accordingly. I am confident that I am the right guy for your job! Following are that I can offer Back-end(Dotnet/ASP.NET framework application) solution • User Authentication • Dashboard with KPI • Web Portals • Dynamic Web Pages • Admin Panels • APIs based architecture • Bug fixing • Support/maintenance job Following are what I can offer for Front-End • React.JS • Knockout • HTML5 • CSS3 • Bootstrap • AntD • Javascript • JQuery Following are my skills: 1. ASP.NET 2. ASP.NET MVC5 3. Dotnet core (MVC) 4. Dotnet Razor Pages 5. Dotnet Web API 6. Javascript 7. React.JS 8. Knockout.JS 9. Databases (MSSQL, Postgres, MySQL, MongoDB) Experienced developing in Dependency injection pattern with SOLID Principle. I am proficient with following CRM integration with third party apps - HubSpot - Zendesk - Zoho Also done integration for following production apps Paperless Parts Fulcrum E2 JobBoss Able to help you to achieve your business goals cost-effectively, promptly, and on budget. Thankful to you for visiting my profile. Let me know if you have more to discuss. I am looking forward to starting working with you.

Hello, I'm Muhammad Faizan, a .NET Backend Developer with 4+ years of experience specializing in Web APIs, Authentication, Real-Time Data Streaming, and Financial Backoffice Systems. I build robust, scalable server-side applications trusted by enterprise clients — especially in the Saudi and investment market space. 💡 What I Do Best .NET Core / .NET 6–8 Web API development JWT Authentication, Identity, Role-based access Angular/React frontend API integration Real-time trading feeds using WebSocket/SignalR SQL optimization, stored procedures, indexing Admin panels & financial backoffice workflows Clean Architecture / DDD / SOLID principles 🚀 What You Get Working With Me ✔ Clean & maintainable code with documentation ✔ Fully tested endpoints (Swagger/Postman) ✔ Authentication + Authorization security layers ✔ Fast performance & query optimization ✔ Deployment support (Azure / AWS / Docker) ✔ Lifetime maintainability with scalable structure 🏦 Finance + Backoffice Domain Strength I have hands-on experience building systems for: 📌 Trading dashboards 📌 Order execution & settlement flow 📌 Portfolio & ledger data processing 📌 Admin authorization panels 📌 Real-time live market streams This makes me an excellent fit for fintech, investment platforms, stock brokers, ERP modules, and financial automation products.

Senior Full Stack Architect | .NET 8 & Next.js | SaaS, AI & Stripe Billing Architecting enterprise-grade, high-performance web applications and SaaS platforms. With over 7 years of full-stack engineering experience, I specialize in migrating legacy systems to modern frameworks and building secure, multi-currency architectures. HOW I DELIVER VALUE (PROVEN DEPLOYMENTS) I do not just write code; I design scalable systems. I strictly enforce the separation of business logic from the presentation layer to ensure long-term maintainability. ▪ Global B2B eCommerce & Analytics Architected a custom CMS and pricing engine supporting 27 languages. Enabled dynamic multi-currency conversions and global routing using .NET Core and Next.js. ▪ Enterprise Automation & Regression Testing Engineered a comprehensive automation testing solution, migrating legacy QA tools to .NET 8. Integrated physical device testing pipelines using HeadSpin and Selenium to drastically reduce deployment cycles. ▪ AI Proxy & Trade Quoting Architecture Developed the backend infrastructure for an AI-driven contractor application. Integrated Supabase, Twilio, and complex Stripe Connect payment gateways for seamless multi-party transactions. ▪ Social Intelligence & Observability Dashboards Built scalable review aggregation platforms integrating custom data scraping. Implemented OpenTelemetry instrumentation for deep backend monitoring, distributed tracing, and metric sampling. CORE TECHNICAL SCHEMA ► Enterprise Backend: .NET 8, C#, ASP.NET Web API, RESTful Architecture ► High-Performance Frontend: React, Next.js (App Router), TypeScript, WCAG Accessibility ► Cloud & Infrastructure: Azure App Services, Azure DevOps, CI/CD pipelines, Docker, opentelemetry/Otel, Datadog, Signoz ► Databases: SQL Server (Performance Tuning, Stored Procedures), EF Core ► AI & Integrations: Local AI Model Orchestration (DeepSeek, Qwen), Stripe Webhooks, OAuth2 If your project requires robust full-stack architecture built for scale, click "Invite to Job" to discuss your roadmap.

🌟 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

🚀 PHP Laravel Developer | API Integrations | Stripe | MySQL Optimization Need a PHP developer who can build APIs, integrate third-party services, optimize databases, or maintain and scale your existing application? I help startups and businesses develop secure, scalable, and high-performance web applications using PHP, Laravel, MySQL, React.js, and Next.js. Over the years, I have worked on eCommerce platforms, LMS systems, ERP solutions, subscription-based products, payment gateways, reporting systems, and enterprise applications. What I Can Help You With: ✅ PHP (Core PHP) Development ✅ Laravel Application Development ✅ REST API Development & Integration ✅ SOAP API Integration ✅ Third-Party API Integrations ✅ Stripe, PayPal & Payment Gateway Integration ✅ Authentication & Authorization Systems ✅ MySQL & SQL Server Database Design ✅ Query Optimization & Stored Procedures ✅ SaaS & Subscription-Based Platforms ✅ Admin Panels & Business Automation Systems ✅ React.js & Next.js Frontend Development ✅ Bug Fixing & Performance Optimization Technologies: • PHP, Laravel • MySQL, SQL Server, PostgreSQL • JavaScript, React.js, Next.js • Node.js • Stripe, PayPal • OAuth, JWT Authentication • AWS, Linux, Docker • Git, CI/CD Recent Project Experience: ✔ Built and maintained enterprise LMS and ERP systems ✔ Integrated Stripe Tax, Apple Wallet, and Google Wallet ✔ Developed REST and SOAP APIs for external services ✔ Optimized complex SQL Server stored procedures and database performance ✔ Built subscription and membership management systems ✔ Developed reporting dashboards and business automation tools ✔ Maintained and enhanced eCommerce platforms Why Clients Work With Me: ✔ Clean and maintainable code ✔ Fast communication ✔ On-time delivery ✔ Strong problem-solving skills ✔ Long-term support and maintenance If you're looking for a developer who can quickly understand your requirements, write quality code, and deliver reliable solutions, feel free to send me a message. I'd be happy to discuss your project.