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daonhan/README.md

PAUL NHAN NGUYEN DAO

Senior Software Engineer | Technical Lead

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📍 Ho Chi Minh City, Vietnam  •  💼 20+ Years Experience  •  ☁️ Azure AZ-204 Certified


🚀 PROFESSIONAL SUMMARY

Senior Software Engineer & Technical Lead with over 20 years of extensive experience architecting high-performance enterprise systems, cloud-native SaaS platforms, and distributed microservices. Proven leader with a strong history of managing engineering teams, establishing robust CI/CD standards, scaling platforms to 3M+ daily users, and orchestrating complex integrations processing millions of daily transactions. Microsoft Azure AZ-204 Certified.


🛠️ TECHNICAL EXPERTISE

Category Technologies & Tools
Languages C# .NET TypeScript JavaScript SQL GraphQL
Frameworks ASP.NET Core Angular React Entity Framework
Cloud & DevOps Azure Docker Kubernetes Azure DevOps CI/CD
Databases CosmosDB SQL Server PostgreSQL MongoDB Redis
Architecture Microservices Event-Driven Architecture DDD (Domain-Driven Design) SOLID Principles CQRS RESTful APIs

💼 PROFESSIONAL EXPERIENCE

🏢 TrueCommerceSenior Software Engineer - Team Lead

August 2020 – January 2026 | Ho Chi Minh City, Vietnam

🌐 TrueCommerce Home (ecUtopia) (July 2024 – January 2026)
  • Role: Technical & Team Lead for a 3-member Vietnam engineering team maintaining and optimizing critical EDI portals.
  • Achievements:
    • Designed and implemented major features: Label Management (with comprehensive audit trails) and high-performance Dynamic Cross Reference tables.
    • Architected and deployed a highly reliable WCF Chunked Upload system featuring asynchronous processing to handle ultra-large client data files efficiently.
  • Tech Stack: .NET, ASP.NET Web Forms, ADO.NET, SQL Server, jQuery, WCF
☁️ Cloud API Adapters Platform (March 2023 – June 2024)
  • Role: Platform Architect & Backend Lead.
  • Achievements:
    • Architected a highly scalable microservices platform processing 1M+ daily transactions with robust fault-tolerance.
    • Designed and implemented a developer-facing self-service API management portal leveraging modern .NET 6 and Azure-native ecosystem.
    • Integrated 15+ e-commerce & retail giants including Channel Advisor, Wayfair, WooCommerce, and Magento.
    • Standardized deployments and unified API models, slashing cloud deployment times by 70%.
  • Tech Stack: .NET 6, CosmosDB, Azure Service Bus, Docker/AKS (Azure Kubernetes Service), GraphQL, Polly, Application Insights
🔄 Universal Adapter Platform (August 2020 – March 2023)
  • Role: Full-Stack Architect.
  • Achievements:
    • Engineered a high-throughput enterprise integration engine supporting over 100+ active SaaS/API connections.
    • Designed and built a responsive Angular 9+ admin panel, applying optimizations (lazy loading, aggressive tree-shaking, custom caching) to ensure rapid load times.
    • Established secured OAuth 2.0 protocols supporting multiple grants, and protected downstream APIs using resilience patterns (circuit breakers, rate limiting).
  • Tech Stack: Angular 9, .NET Framework 4.7.2, Redis, RabbitMQ, Azure Service Bus

🏢 Mua&BánSenior Software Developer

June 2015 – June 2020 | Ho Chi Minh City, Vietnam

📦 muaban.net (Vietnam's Premier Classifieds) (June 2015 – June 2020)
  • Achievements:
    • Designed and optimized high-concurrency RESTful APIs serving 3M+ requests daily with sub-100ms response times.
    • Re-architected and built the flagship cross-platform React Native app, scaling the mobile user base to 500K+ active users.
    • Overhauled full-text search indexes and query structures, reducing complex database lookup latencies by 60%.
  • Tech Stack: .NET Core, React Native, PostgreSQL, Redis, Solr
💼 BNetApp B2B Platform (June 2015 – June 2020)
  • Achievements:
    • Led the design of a progressive Angular SPA with advanced PWA caching strategies.
    • Delivered clean real-time operational dashboards visualizing sales funnel metrics and processing 100K+ transactions daily.
    • Guaranteed high availability and 99.9% uptime through active NGINX reverse-proxying, Cloudflare edge caching, and load balancing.
  • Tech Stack: Angular, .NET Core, NGINX, Cloudflare, SQL Server

🏢 LawSoftSenior .NET Developer

2007 – 2015 | Ho Chi Minh City, Vietnam

  • Led the core engineering of thuvienphapluat.vn—Vietnam's largest, most authoritative online legal database.
  • Built a highly responsive real-time document collaboration platform using SignalR.
  • Mentored and managed a 5-person engineering team, establishing agile sprint practices and Git workflows.
  • Tech Stack: .NET Framework, SignalR, SQL Server, ASP.NET MVC

🏢 TD&T TanDucJunior Web Developer

2003 – 2007 | Ho Chi Minh City, Vietnam

  • Designed, built, and maintained complex web applications for the travel and education industries.
  • Tech Stack: .NET, PHP, SQL Server, MySQL

🏆 KEY ACHIEVEMENTS & CERTIFICATIONS

Microsoft Certified: Azure Developer Associate

🛡️ Microsoft Certified: Azure Developer Associate (AZ-204)

Demonstrated hands-on expertise in designing, building, testing, and maintaining secure, scalable cloud solutions on the Microsoft Azure platform.

Verify on Credly ↗
  • 📈 Scale Expert: Successfully designed and scaled applications from inception (1K users) to national scale (3M+ daily active users).
  • 🚀 Migration Leader: Spearheaded multiple smooth monolith-to-microservices migrations with zero downtime.
  • 💡 Cost Efficiency: Optimized Azure resources, container hosting plans, and indexes to decrease cloud infrastructure costs by 35%.

📊 GITHUB METRICS

Daonhan's GitHub Stats Daonhan's Top Languages


🎓 EDUCATION

🎓 Bachelor of Science in Information Technology
Dalat University, Vietnam (1997 - 2003)


Let's build something extraordinary. Get in touch via LinkedIn or Email!

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