Node.js → Express.js → API Design (REST/GraphQL) → Auth & Authorization → Server Management

Core Web → Frontend Frameworks → Backend Frameworks → Databases → Version Control (Git) → Deployment

SQL (MySQL/PostgreSQL) → NoSQL (MongoDB/Redis) → CI/CD → Docker → Kubernetes → Cloud Platforms

Big O Notation → Arrays & Strings → Linked Lists → Stacks & Queues → Trees, Tries & Graphs → Sorting & Searching → Dynamic Programming

Processes & Threads → Memory Management → CPU Scheduling → Deadlocks → File Systems → Concurrency

OSI Model → TCP/IP Suite → HTTP/HTTPS → DNS → IP Addressing → Routing & Switching

OWASP Top 10 → Encryption → Hashing → Network Security → AuthN & AuthZ → Vulnerability Assessment

Python (NumPy, Pandas, Scikit) → Statistics & Probability → Supervised Learning → Unsupervised Learning → Model Evaluation → Deep Learning (TF/PyTorch)

Kotlin → Android Studio → UI/UX (XML/Compose) → Activities & Fragments → ViewModel & LiveData → Networking (Retrofit)

LLMs → Prompt Engineering → Transformers → Fine-tuning Models → Diffusion Models → Ethics in GenAI