Welcome to my GitHub! I'm a full-stack developer passionate about building scalable applications, DevOps, cybersecurity, and maker culture. Here you'll find my projects spanning from web development to infrastructure automation and hardware experiments.

Backend & Systems

• C# – Primary backend language (.NET, Entity Framework, SOLID principles)
• SQL – PostgreSQL, MS SQL Server, MongoDB
• Python – Task automation, scripting, data analysis

Frontend & UI

• React.js – Modern frontend development with Vite
• JavaScript/TypeScript – Web development

DevOps & Infrastructure

• Docker & Docker Compose – Containerization and orchestration
• Kubernetes – Container orchestration (learning)
• Azure – Cloud services (AZ-204, AZ-400 certified)
• Linux – Debian/Ubuntu system administration
• PowerShell & Bash – Scripting and automation

Electronics & IoT

• Arduino – Sensor projects and embedded systems
• 3D Printing – Ender 3 V3 (design, slicing, custom modifications)

Software Developer @ GEMINI SOFTWARE

• Full-Stack Web Development – Building robust, scalable applications
• DevOps & Cloud Infrastructure – Docker, Kubernetes, Azure, CI/CD pipelines
• Cybersecurity – Network security, penetration testing, Kali Linux
• Home Automation & Self-Hosting – Media servers (Lidarr, Portainer, Home Assistant)
• 3D Printing & Hardware Hacking – Custom designs, modifications, prototyping
• Motorcycles – Riding, maintenance, modifications, and mechanical work
• DIY Projects – Building custom PCs, home lab infrastructure

A full-stack appointment management system with patient records, scheduling, and notifications.

• Stack: C# .NET, React, PostgreSQL, Docker
• Features: RESTful APIs, authentication, real-time updates

Self-hosted media management with Docker containerization.

• Tools: Docker Compose, Portainer, Lidarr, Home Assistant
• Infrastructure: Linux, networking, storage optimization

Sensor integration and electronics experimentation.

• Projects: Temperature monitoring, sensor networks, custom hardware

• Kubernetes & advanced orchestration
• Cybersecurity certifications (Ethical Hacking, CEH)
• Microservices architecture patterns
• AI/LLM integration in applications
• Advanced DevOps practices

• Azure Developer Associate (AZ-204)
• Azure DevOps Engineer (AZ-400)
• Full-stack .NET/React developer with 3+ years experience

• Ride motorcycles and enjoy mechanical work
• 3D printing enthusiast with custom modifications
• Building a home lab for infrastructure experiments
• TV series fan (The Sopranos)

• Email: [email protected]
• LinkedIn: https://www.linkedin.com/in/nikola-andrejevic/
• GitHub: You're here! 👋

"Code, coffee, motorcycles, and continuous learning." ☕🏍️💻

Feel free to reach out with ideas, collaborations, or just to chat about tech, motorcycles, or 3D printing!