Vistianu Vladimir

Key Responsibilities & Technologies

At Stefanini, I work as a .NET backend developer, primarily responsible for designing and implementing backend solutions for web applications. One of my key projects was the development of the Techexpert recruitment platform, built using C# and .NET 6. Our team started with minimal business logic requirements, and I played a critical role in shaping the backend architecture and API design. I actively contributed to technical decisions, worked closely with stakeholders to refine system logic, and ensured the backend was scalable and maintainable.

• Backend Development & API Engineering: Developed and optimized RESTful APIs using ASP.NET Core (.NET 6, C#) for quiz creation, candidate assessment, and automated evaluation.
• Database Architecture & Management: Designed and maintained Microsoft SQL Server schemas, handled database migrations with Entity Framework Core, and optimized queries for efficiency.
• Business Logic Implementation: Defined and implemented complex business rules for quiz scoring, answer evaluation, and system workflows.
• Infrastructure & Deployment: Worked with the DevOps team on Azure deployment, configuring Dockerized services and additional Azure resources.
• Authentication & Security: Implemented JWT-based authentication and role-based access control (RBAC) for secure API access.
• AI Integration: Integrated OpenAI API to automate question generation and AI-driven answer evaluation, streamlining the recruitment process.
• Background Processing & Task Automation: Used Hangfire for scheduling automated tasks, including quiz result processing and reporting.
• Testing & Code Quality: Wrote unit tests using NUnit to ensure code reliability and maintainability.
• Team Collaboration & Agile Development: Worked closely with frontend developers, business analysts, and project managers, assigned development tasks, participated in technical discussions, and contributed to knowledge sharing.

Key Responsibilities & Technologies

As a Software Engineer at Extenda Retail, I worked on multiple projects, primarily focusing on backend development, API engineering, and business logic implementation using .NET (C#). My role involved developing and maintaining RESTful APIs, managing databases, implementing business logic, and improving system architecture while collaborating with cross-functional teams.

• Backend Development & Business Logic: Designed, implemented, and optimized REST APIs using ASP.NET Core, ensuring efficient request handling, validation, and business logic execution.
• Database & Caching Management: Worked with PostgreSQL and Microsoft SQL Server, extending database schemas, optimizing queries, and managing migrations with Entity Framework Core. Worked with Redis for caching frequently accessed data and improving system performance.
• API Enhancements & System Architecture: Developed new API endpoints, refactored existing ones, and ensured performance optimization while integrating business rules into backend logic.
• Logging & Monitoring: Implemented Serilog, OpenTelemetry, and Stackdriver for structured logging, distributed tracing, and system observability.
• Documentation Maintained API documentation using Swashbuckle (OpenAPI) and contributed to internal knowledge bases.
• CI/CD & Workflow Automation: Created and maintained Git workflows for automation