- Programming languages: Java, NodeJs, Go, PHP, Python.
- Databases: PostgreSQL, MySQL, MongoDB, Redis, Oracle.
- Working with APIs: RESTful API, GraphQL, microservice architecture.
- Development tools: Docker, Kubernetes, Git, Makefile, CI/CD (GitLab, GitHub Actions, Jenkins).
- Cloud platforms: AWS, Google Cloud Platform (GCP), or Oracle Cloud Infrastructure (OCI).
- Methodologies: Agile, Scrum, Kanban.