- Expert: Python, Java, PHP, Node
- Similar: Rust, Golang
- Web Development
- Backend: Django/Flask, Spring/Spring boot/Spring security, Laravel/Symfony/Wordpress, Express
- Frontend: React/Redux/React Native/Angular, Html5/jQuery/Bootstrap/Typescript
- IoT/Raspberry pi3,4/Jetson Nano/ThingsBoard/Mqtt
- Cloud
- AWS: EC2, ECS, RDS, Beanstalk, Lambda, S3, GraphQL, IoT Core...
- GCP: Compute/App Engine, Storage, Firestore, PubSub, GKE, GSuite
- Database
- SQL: MySQL/PostgreSQL/SQL Server
- BigData/NoSQL: MongoDB, Firestore, Redis, Apache Kafka/Spark
- Search engine
- Elastic search: ELK, full-text search, schema-free JSON documents
- Solr: full-text search, dynamic clustering, NoSQL features, rich document handling
- Devops
- Microservices & Containerization: Docker, DockerCompose, Swarm
- CI/CD: Terraform, Jenkins, Ansible, Bitbucket/Github/Gitlab