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I’m a Senior .NET/Azure Backend Engineer with 14+ years of experience building scalable SaaS platforms, ASP.NET Core APIs, SQL Server/PostgreSQL-backed systems, cloud-native backend services, and data-heavy applications. I help startups, SaaS companies, and enterprise teams design, build, modernize, and stabilize backend systems that need to be secure, reliable, maintainable, and ready to scale. I have worked on projects for organizations including Barclays and UNICEF, and I specialize in backend systems where clean architecture, database performance, API design, cloud reliability, and long-term maintainability matter. Core Expertise: ⚙️ Backend Engineering: .NET, ASP.NET Core, C#, REST APIs ☁️ Cloud Development: Azure Functions, Azure SQL, Azure Storage, ADF 🗄️ Database Engineering: SQL Server, PostgreSQL, Dapper, EF Core 🔌 API Integrations: OAuth2, JWT, Stripe, Twilio, CoreLogic, third-party APIs 📊 Data Platforms: ETL, CSV ingestion, data validation, large-scale processing 🏗️ Architecture: SaaS platforms, clean architecture, maintainable systems 🚀 Performance: query tuning, backend optimization, scalable workflows 🔐 Security: authentication, authorization, secrets handling, secure APIs 🧩 Modernization: legacy system refactoring and cloud migration 🛠️ Reliability: production debugging, monitoring, and long-term maintenance Highlights: 🚀 Improved backend/API performance and reduced latency in production systems 🏦 Delivered enterprise-grade software for fintech, SaaS, and global organizations 🔄 Integrated 20+ third-party APIs including payment, communication, AI, and data providers 📈 Built cloud-native solutions using Azure Functions, Azure SQL, and serverless workflows 📊 Designed and optimized SQL-heavy systems, reporting flows, and data ingestion pipelines 🛠️ Supported long-term production systems with debugging, maintenance, and performance tuning Problems I Can Help You Solve: ✅ Build a secure .NET / ASP.NET Core backend from scratch ✅ Modernize or refactor an existing legacy .NET application ✅ Design REST APIs for web, mobile, SaaS, or internal platforms ✅ Improve slow SQL queries, stored procedures, and database-heavy workflows ✅ Build Azure Functions, background jobs, and cloud automation ✅ Create data ingestion pipelines for CSV, API, database, or third-party sources ✅ Debug production issues and stabilize unreliable backend systems ✅ Integrate external APIs with proper error handling, retries, and logging Why Work With Me: ✅ 14+ years of hands-on backend engineering experience ✅ Strong focus on clean architecture, maintainability, and production quality ✅ Comfortable working with both startups and enterprise environments ✅ Clear communication, regular updates, and practical technical decisions ✅ Experienced in long-term projects, complex systems, and business-critical applications ✅ I don’t just write code — I help you make the right backend decisions Client Feedback: “Ashfaqbadon was very easy to communicate with, highly capable, and went above and beyond to deliver a complex project ahead of schedule.” If you need a reliable senior backend engineer for .NET, Azure, APIs, databases, or data-heavy systems, feel free to message me. I’d be happy to discuss your project and suggest the best technical approach.

I help companies worldwide build, scale, and modernize enterprise-grade applications using .NET. With 11+ years of experience, I specialize in designing high-performance, secure, and scalable systems that support critical business operations. I’ve worked across industries including finance, healthcare, CRM, Inventory, ERP and e-learning—helping teams turn complex challenges into reliable, production-ready solutions. I bring deep expertise across the Microsoft ecosystem, with a strong focus on Blazor, ASP.NET Core, and modern full-stack architecture. What I do: Build scalable full-stack applications using C#, ASP.NET Core, and Web APIs Develop rich, interactive UIs with Blazor (Server & WebAssembly) Modernize legacy systems into clean, maintainable architectures Design systems using SOLID principles, CQRS, MediatR, and Domain-Driven Design Deploy and manage applications on Azure and AWS with CI/CD pipelines Ensure code quality through Test-Driven Development (xUnit, bUnit, Moq) How I add value: Improve system performance and scalability Reduce technical debt in legacy applications Deliver clean, maintainable, and future-ready solutions Align technology with real business goals I’m passionate about building systems that not only work—but scale, perform, and last. If you're looking to build or modernize a .NET-based system, or simply want to exchange ideas around scalable application architecture—feel free to connect.

150+ Jobs Completed | 2000+ Hours Logged With 16+ years of working as a software engineer, technical lead and software architect, Tajbir brings deep understanding of enterprise software, management, and technical strategy to any project. He has extensive experience in full stack development, both on mobile platforms and web architectures (client and server side). He writes code that can be maintained and expanded over time as business systems and requirements adapt to market demands or pivots in core business direction. He is obsessed with learning newer and better technologies to bring the best solutions to all products and ideas. He possesses a vast range of skills in many different technologies, designs, and methods of execution. Education- Bachelor's Degree in Computer Science And Engineering (4 Years) Master's Degree in Computer Science (Major: Software Engineering) (2 Years) Expert in- Framework: Asp.Net MVC, Asp.Net Core, Node, MEAN, MERN Front End: VanillaJS, Angular, React, Vue, jQuery, LESS, Bootstrap, Semantic UI Database: MS SQL Server, MongoDB, MySQL, Firebase E-Commerce: Shopify, NopCommerce CMS: Wordpress, Custom CMS Development in Asp.net Designing Tools: Figma, Adobe XD, Adobe Photoshop, Adobe Illustrator

I bring over 17 years of extensive experience in software development, specializing in the .NET Framework and .NET Core ecosystems. My expertise includes: ✓ Web Development: Proficient in ASP.NET Core MVC, ASP.NET Core Web API, ASP.NET MVC, ASP.NET Web Forms, and Windows Forms. ✓ Programming Languages: Expertise in C# and VB.NET with a strong command of modern software development practices. ✓ Database Management: 16+ years of experience with Microsoft SQL Server, encompassing SQL, T-SQL, ADO.NET, LINQ, Entity Framework, Entity Framework Core, and Dapper. ✓ Front-End Technologies: Strong skills in JavaScript, React, jQuery, HTML, CSS, and Bootstrap. ✓ FileMaker Expertise: 14+ years of experience with FileMaker Pro, FileMaker Server, and Claris FileMaker Cloud. ✓ Additional Skills: Proficiency in PHP/MySQL, MongoDB, data scraping, and integrating third-party APIs such as Stripe, PartnerStack, and tour/activity platforms. I am also experienced in implementing biometric device integrations. Why Hire Me? I am a results-driven professional dedicated to delivering exceptional solutions. My ability to transform ideas into reality, coupled with a strong commitment to deadlines and high-quality outcomes, ensures client satisfaction and successful project delivery. With a proven track record of tackling complex challenges and exceeding expectations, I am a reliable partner for achieving your goals.

I have over 16 years of professional software development experience, including 5 years of hands-on experience with Oracle FLEXCUBE Core Banking (CBS). Throughout my career, I have designed, developed, enhanced, and maintained enterprise applications for banking and business domains using Microsoft technologies, Oracle databases, and cloud platforms. My core expertise includes: * Oracle FLEXCUBE (CBS) * C#, ASP.NET, ASP.NET Core, .NET Core, Web API * Oracle PL/SQL, Microsoft SQL Server (MSSQL), MySQL, PostgreSQL * Database Migration (MSSQL ↔ MySQL, Oracle ↔ MSSQL, data migration, schema conversion, ETL, and data validation) * Database Administration (DBA) activities, including database installation, backup & recovery, performance tuning, indexing, query optimization, user/security management, monitoring, and maintenance * Java, Entity Framework, Dapper * Angular, JavaScript, HTML, CSS, jQuery * AWS and Azure Cloud * SSRS, Crystal Reports * Git, TFS, Bitbucket, Jira, and Agile development What I can bring to your project: * Clean, scalable, and maintainable code * Strong database design, administration, and performance optimization * Database migration between MSSQL, MySQL, Oracle, and PostgreSQL with minimal downtime and data integrity * Experience integrating APIs and enterprise systems * Fast issue diagnosis and reliable bug fixing * Clear communication and on-time delivery * Ability to work independently or collaborate effectively with your team Having worked as a Senior Developer and Team Lead, I understand both the technical and business aspects of software development. Whether you need a new application, enhancements to an existing system, database migration, database administration, performance tuning, or long-term development support, I can deliver high-quality solutions that align with your business goals. I would be happy to discuss your project in more detail and recommend the most effective approach. I am available to start immediately and look forward to contributing to your project’s success. Thank you for taking the time to read my profile. I hope to speak with you soon! If you’re looking for high-quality work, fast turnaround, and reliable technical expertise at a fair price, please don’t hesitate to contact me.

I’m a full-stack developer with deep expertise in Angular and .NET, specializing in building seamless hybrid applications that bridge desktop and web. From crafting flicker-free UI with Angular route resolvers to architecting robust backend services in .NET Core, I deliver scalable, maintainable solutions with precision. 🔧 I thrive on solving complex activation flows, optimizing IPC mechanisms, and refining MSIX packaging for flawless deployment. Whether it's protocol activation, COM/DCOM interop, or registry cleanup—I've got it covered. 🚀 Let’s build something powerful, elegant, and ready for global scale.