Front-end:

✅ React / Next.js

✅ Vue / Nuxt.js

✅ Angular

✅ Svelte

✅ Tailwind CSS / Bootstrap

✅ Material UI

Back-end:

✅ Node.js / Express.js

✅ Laravel / PHP

✅ Python / Django / Flask / FastAPI

Database:

✅ Relational DB (MySQL, PostgreSQL, MS SQL, Oracle)

✅ NoSQL DB (MongoDB, Firebase, Redis, Neo4j)

API:

✅ REST API / SOAP / gRPC / GraphQL

Design and Development Principles:

✅ GOF Design Patterns

✅ Domain Driven Design

✅ Test Driven Development

✅ CQRS

✅ Event Sourcing

Architectural Patterns:

✅ Monolithic / Microservices / SOA / Serverless / Service Mesh

Others:

✅ WebRTC / WebSocket / Firebase Realtime Database

✅ RabbitMQ / Kafka

✅ WebSockets

✅ Nginx / Apache / Coddy / MS IIS

✅ Kubernetes

✅ CI/CD

✅ DevOps

✅ Unit Test