Backend-oriented .NET developer with 3+ years of experience in enterprise ERP/logistics systems. Strong production background in WinForms/WPF, hybrid service integration, SQL-heavy workflows, reporting, and data reconciliation. Currently positioning toward ASP.NET Core Web API and backend service roles while leveraging real enterprise experience in finance, import operations, and business-critical reporting.

• Impact: improved heavy report/runtime performance by ~40% and reduced DB/query cost by ~30% in supported areas
• Scale: handled 30k+ row search/report flows with batching, query review, and performance-focused data processing
• Core strengths: ERP/logistics workflows, finance/reporting correctness, multi-source reconciliation, cross-layer tracing, and maintainable business logic
• Production background: WinForms/WPF, DevExpress, SQL Server/MySQL, WCF/SOAP, layered enterprise systems
• Backend direction: ASP.NET Core Web API, EF Core, persistence design, testing, containerized development, and service-oriented backend flows

NDA-safe note: I describe architecture, responsibilities, and outcomes without exposing proprietary source code or internal implementation details.

Worked on assigned modules inside a large enterprise ERP/logistics platform, with primary focus on finance, import operations, reporting, and data reconciliation.

• Finance / AR workflows: receivables reconciliation, import-fee flows, reporting correctness, and business-rule-heavy debt logic
• Reporting systems: heavy search/report flows, reusable reporting utilities, exports, and performance-focused query refinement
• Import operations: customs-related workflows, import finance handling, cross-source data aggregation, and reporting validation
• Enterprise tracing: followed production flows end-to-end from UI -> service wrapper -> handler -> business logic -> data layer -> database
• Hybrid production environment: worked across WinForms clients, internal service wrappers, and hybrid WCF / Web API service flows inside a long-lived ERP/logistics system

I am targeting .NET Backend Developer roles with emphasis on:

• ASP.NET Core Web API
• EF Core / SQL-first backend thinking
• Validation, logging, and error handling
• Testing for workflow-heavy business logic
• Docker / containerized development
• Messaging and backend service patterns
• Maintainable backend code for reporting, persistence, and business rules

• Portfolio: vinh-portfolio-self.vercel.app
• CV (PDF): View Resume
• LinkedIn: linkedin.com/in/do-the-vinh

Backend / Services: C#, .NET, ASP.NET Core Web API, REST, WCF/SOAP
Data: SQL Server, MySQL, EF Core, query tuning, batching, reporting flows
Enterprise Client Background: WinForms, WPF, DevExpress, ClickOnce
Delivery: Git, GitHub Actions, CI/CD

I am strongest where backend logic meets business-critical operations — especially in ERP/logistics environments with complex workflows, reporting correctness, reconciliation, and maintainability requirements.