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Luiz Sardariu

@luizsardariu

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I build secure full-stack software with C#, .NET, SQL, and hands-on cybersecurity operations.

Romania

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What I'm looking for

I'm looking for a role where I can build secure, reliable software with C#, .NET, SQL, and web technologies while continuing to grow in cybersecurity, network security, and technical problem-solving.

I developed and maintained financial and accounting software at Smart Software S.R.L. using C#, .NET, Entity Framework, MySQL, and ASP.NET.

I built responsive web interfaces, optimized database queries and schemas, and resolved core application logic issues by analyzing system architecture and client-server data flows. I also provided tier-2 remote technical support, helping users configure systems and applications.

During my cybersecurity internship at Altair Soft S.R.L., I performed OSINT reconnaissance, network vulnerability assessments, port scanning, and infrastructure mapping with Nmap and system utilities.

I use virtualized environments for secure malware testing, monitor system integrity with cryptographic hashes, and analyze attack vectors including DoS/DDoS and phishing to support prevention strategies. I also use GitHub Copilot, Claude, and prompt engineering to accelerate debugging, prototyping, and testing.

Experience

Work history, roles, and key accomplishments

Cybersecurity Intern

Altair Soft S.R.L.

Nov 2025 - Jan 2026 (2 months)

Performed footprinting and reconnaissance operations using OSINT tools. Conducted network vulnerability assessments, port scanning, and infrastructure mapping using Nmap and system utilities.

OSINT Nmap Vulnerability Assessment Virtualization VMWare VirtualBox Malware Analysis DoS DDoS Social Engineering

Junior Full-Stack Developer

Smart Software S.R.L.

Oct 2024 - Apr 2025 (6 months)

Developed and maintained financial and accounting software solutions using C#, .NET, and Entity Framework. Executed complex MySQL queries for data extraction, database schema design, and query performance optimization.

C#.NET Entity Framework MySQL ASP.NET Responsive Design Debugging Technical Support