Hire the Best .NET Compact Framework Developers
in Vietnam

Hello, I’m Jason Nhien Truong, a Senior Software Engineer and Software Architect with over 20 years of professional experience delivering reliable, maintainable software solutions for businesses across multiple industries. I specialize in C# and .NET development, Windows desktop applications, enterprise web systems, SQL databases, and Azure-based platforms. I help clients modernize legacy systems, stabilize and scale existing products, and build new applications with a strong focus on performance, usability, and long-term maintainability. I work closely with stakeholders to translate business needs into practical, well-structured technical solutions. What I offer Full-stack .NET development I work across the .NET ecosystem, from legacy ASP.NET Web Forms to modern .NET 8 APIs and microservices. I design secure, scalable backend systems with clean architecture and clear separation of concerns. Windows desktop application development I have extensive experience building and maintaining Windows desktop applications using WinForms and WPF, including MVVM-based WPF applications. I focus on responsive UI behavior, clean data binding, maintainable ViewModel design, and user-friendly workflows for business-critical desktop software. Enterprise UI with DevExpress and Telerik I have deep expertise with DevExpress and Telerik controls for WinForms and web applications. I redesign and modernize complex UIs to improve usability, consistency, and performance without breaking existing business logic. Database architecture and optimization Strong experience with SQL Server, PostgreSQL, MySQL, and Azure SQL. I design schemas, optimize queries, and ensure data integrity and stability in production systems. Azure cloud and DevOps Hands-on experience deploying and maintaining applications on Azure, including CI/CD pipelines, containerized services, background processing, and cloud-based integrations. Testing and automation I write unit and integration tests using xUnit and NUnit, and implement automation with Selenium and AutoIt to improve quality and reduce regression risk. Key technical skills Languages and platforms C#, .NET Core, .NET 8, ASP.NET, SQL, JavaScript, HTML, CSS, Python Desktop development WinForms, WPF, MVVM, DevExpress WinForms, Telerik UI Frameworks and tools Entity Framework, LINQ, Docker, Azure DevOps Databases SQL Server, PostgreSQL, MySQL, MongoDB, Azure SQL Cloud and monitoring Azure, Kubernetes, Azure Service Bus, Prometheus, Grafana Architecture Microservices, Clean Architecture, Domain-Driven Design Selected projects Web forecasting application maintenance Maintained and enhanced a legacy ASP.NET Web Forms application using SQL Server 2022 and Telerik UI. Improved UI workflows, business logic, and performance. Betx – cloud-native microservices platform Developed backend microservices using .NET 8 and Web API. Worked on PostgreSQL data modeling, Azure Kubernetes deployment, secure APIs, messaging, and observability with Prometheus and Grafana. Custom ERP system for manufacturing Built a custom ERP system using C# and SQL Server, including workflows, reporting, role-based access, and third-party integrations. Carrier pricing API integration Integrated FedEx and UPS APIs for real-time pricing, data synchronization, and robust error handling with retries and logging. Why work with me I bring deep technical experience, strong ownership, and a business-focused mindset. I communicate clearly, meet commitments, and build software that remains stable and maintainable over time. Availability Open to full-time or part-time engagements. Flexible with time zones for long-term projects. If you’re looking for a senior .NET engineer who can handle both backend systems and Windows desktop applications with confidence, feel free to reach out.

Legacy .NET Framework app? Slow SQL Server queries? I migrate ASP.NET MVC applications to .NET 8/10 and optimize the databases behind them, safely, incrementally, without breaking production. I'm a Senior .NET Engineer and Technical Lead with 14+ years in enterprise C# .NET, React, and SQL Server. Most recently I led a team of 8 engineers on Wellbarrier, an enterprise SaaS platform delivered to SLB and used by major oil & gas operators worldwide. It's a large, long-lived codebase built across 4 Scrum teams. Legacy systems, complex data models, and production systems that can't afford downtime are my home ground. ━━━━━━━━━━━━━━━━━ WHAT I HELP WITH ━━━━━━━━━━━━━━━━━ 1️⃣ LEGACY .NET MODERNIZATION & UPGRADES ▪️ ASP.NET MVC on .NET Framework 3.5 / 4.x to ASP.NET Core / .NET 6, 8, 10 (LTS), including the 3.5 to 4.8 upgrade step for very old codebases ▪️ Entity Framework 6 to EF Core: mapping changes, query behavior differences, and data-layer refactoring ▪️ Legacy front ends (Razor, jQuery, AngularJS) rebuilt in modern React ▪️ Every migration starts with an assessment: dependency audit, breaking-change map, and a phased plan, so you know the real cost and risk BEFORE the work begins 2️⃣ DATABASE DESIGN & OPTIMIZATION (SQL SERVER) ▪️ Schema design for new products, plus redesign of data models that grew messy over the years ▪️ Rescuing slow queries, timeouts, and heavy reports: indexing, query tuning, execution plan analysis on large production datasets 3️⃣ NEW FEATURES FROM SCRATCH, FROM SPEC TO SHIPPED ▪️ Certified Scrum professional (PSM I, PSD I, PAL I, SPS from Scrum•org). I turn a rough idea into user workflows, acceptance criteria, and a sprint-ready backlog, then build it in C# .NET and React ▪️ Ideal if you have a product vision but no written requirements yet ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHY CLIENTS WORK WITH ME ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▪️14+ years of hands-on development, with international clients since 2012 across e-commerce, recruitment, oil & gas, and SaaS ▪️4+ years leading engineers: architecture decisions, code reviews, mentoring, sprint planning ▪️Enterprise discipline: clean code, unit testing, CI/CD, Git, refactoring without breaking existing behavior ▪️Clear written communication and reliable delivery across time zones. I typically respond within a few hours. ━━━━━━━━━━━━━━━━━━━ HOW WE CAN START ━━━━━━━━━━━━━━━━━━━ ▪️Small first: a fixed-price migration assessment, a database performance audit, or a feature specification package. You get a concrete deliverable and see exactly how I work. Then we scale up to the full migration, the new feature, or a long-term engagement. ▪️Available full-time, for focused projects or long-term contracts. ▪️Message me with your current .NET version, database, and main pain point, and I'll reply with an honest first take on the best path forward.

Software Engineer | .NET Specialist With over 14 years of experience, I specialize in building robust, scalable applications using .NET technologies, particularly C# and .NET Core. My expertise spans backend development, system design, and creating solutions that meet business objectives efficiently. What Sets Me Apart as a Professional ✅ Effective Communication – Clear, concise, and collaborative. ✅ Quick Learner – Rapidly adapt to new technologies and methodologies. ✅ Resilient Work Ethic – Persistent and disciplined in overcoming challenges. ✅ Task & Time Management – Deliver quality work under tight deadlines. ✅ Prioritization – Focused on what matters most to meet goals effectively. Key Technical Skills ⭐ Strong foundation in Object-Oriented Programming (OOP) and System Design. ⭐ Deep understanding and application of design patterns in software solutions. ⭐ Proficient in REST API design, architecture, implementation, and integration. ⭐ Skilled in version control systems, including GitHub and GitLab. Core Competencies ⭐ Backend Development: Building robust applications using .NET Core. ⭐ Microservices Architecture: Developing with clean, scalable design principles. ⭐ Unit Testing & TDD: Ensuring high-quality code through test-driven development. ⭐ CI/CD Pipelines: Creating automated workflows using Git and other CI tools. ⭐ Database Management: Working with both RDBMS (SQL Server, MySQL) and NoSQL (MongoDB). ⭐ Web Applications: Creating responsive web apps using Angular 2+ and modern frontend frameworks. ⭐ REST APIs: Developing APIs to power mobile and frontend applications. Tech Stack ✅ Languages & Frameworks: C#, .NET Core, React, TypeScript, JavaScript, jQuery. ✅ Databases: SQL Server, MySQL, MongoDB. ✅ DevOps & Tools: Azure, GitHub, GitLab, CI/CD pipelines. ✅ Methodologies: Test-Driven Development (TDD), Clean Architecture, Agile practices. Thank you for taking the time to review my profile. – Kiet Le

*** My experience *** I have implemented multiple C# / .NET / ASP.NET [Core] [MVC] / RESTful / JS/TS / SQL Full-Stack solutions and it will be my pleasure to do so again for you and make your project successful. I have worked for 7 years for a company specializing in that stack before moving to online freelancing iin 2022, hence my expertise. For JS/TS, I have implemented solutions with both React and Angular. *** About me *** I'm a Canadian expat living in Vietnam. I worked for 7 years as a software developer for a Canadian company before moving to online freelancing in late 2022. I learned programming in 2003 when I was 13 and made simple apps on and off for a few years before getting hooked for good around 2013. I've since programmed almost every siingle day, occasionally on hobby projects as well as for work since 2015. *** What to expect *** As your freelancer, my priority is making your project a success. I care about it personally, and I mean it. As a programmer, my priority is quality (of code and UX). I design for long-term maintainability, performance, and scalability. I love what I do, and I care to do it well.

Hello, I am a full stack software developer, freelancing world wide. I apply SDLC, OOAD, SOLID and other software craftsmanship practices.. but not forget to use KISS principle. I’m experienced in creating web applications, web services, specializes in scalable, enterprise-level application development and engineering solutions for exceptionally high throughput. Over 10 years of experiences in technical consultant, and architect, specializes in full-stack, highly scalable, real-time data services, I have delivered top quality technical architecture, programming, testing and solutions for complex problems on-time and within budget.. I'm an Agile Kanban practitioner who loves to collaborate on development projects. Languages and Frameworks: .Net Core, C#, Nest js, Next js, Python, Node.js, Angular, ngRx, React, Redux, Mobx, Vue js, Knockout.js, Cordova , Express.js, Gulp.js, Mean Stack, ASP.Net MVC, C#, REST API, Grunt, Javascript, Jquery, HTML5, CSS, Bootstrap, Material Design, GraphQL , MongoDB, PostgreSQL, Test-driven Development (TDD), Software Architecture, SAAS, Microservices, Serverless, AWS, Azure Cloud Services, Azure Pipeline, CI/CD DevOps, Docker, Kubernetes. Highly skilled and experienced in: . Web User Interface, User Experienced modern design and implementation . Database creation, integration, and management . Using back-end frameworks to build server-side services, Web API, Restful service implemenetation and integration . Cloud server integration, especailly Azure . Content management system (CMS) development, deployment, and maintenance . Data analysis and reporting, visualization and business intelligent with Power BI . Architect .NET solutions. Well-versed in .NET frameworks, Web/Windows Services, and Team Foundation Servers, GIT . Gathering business requirements, completing key architecture design, and overseeing low-level and high-level design and documentation across the software development lifecycle. I'm working with agility, cooperation with trust and quality, experienced in Scrum Agile. I'm looking for long-term cooperation in freelancing work with you ! Thank you in advance for your time and consideration.

With over 10 years of full-stack development expertise, I specialize in: - C#/ WPF for developing Cross-platform application. Creating on demand installer with WIX, NSIS - Java 17 with Spring Boot for robust backend solutions. - Data JPA with PostgreSQL, MySQL for effective data management. - Angular/React + TypeScript for dynamic frontend development. - Deploying on ECS/EKS in AWS for scalable backend services. - AWS Amplify, Vercel, Firebase for streamlined frontend deployment. - AWS Gateway, VPC for ensuring service security. - Proficient in CI/CD pipelines for automated testing and deployment. I excel in delivering end-to-end software solutions, from requirement gathering to production deployment. My focus is on creating efficient, maintainable software with a solid foundation in Java and object-oriented design principles. Let's discuss how I can contribute to your projects.