The Skills That Separate Juniors from Seniors

Collaboration Tools (Linear, MS Teams, Slack, Zoom, Confluence)
Programming Languages (Java, JavaScript, Python, C#, Go)
API Development (REST, gRPC, Security, Encryption, Signing, Protocols)
Web Services (Nginx, Tomcat)
Cloud (AWS, Azure, Kubernetes)
Authentication (Tokens, OAuth2.0, JWT, Cookies)
Testing (TDD, Unit Test, E2E Test, Performance Testing)
Databases (Relational: MySQL, PostgreSQL; Non-Relational: MongoDB, Cassandra, Redis)
CI/CD (Jenkins, GitHub Actions, CircleCI, GitLab)
System DesignProtocols: TCP, UDP, DNS, Caching, Content Delivery Networks, Microservices Messaging, Architecture, Load Balancing, Sharding, Distributed Systems, Database Replication
Data Structures and Algorithms (Big O Notation, Recursion, Sorting, Trees, Graphs)
Design Patterns (Factory, Dependency Injection, Proxy, Observer, Facade)
AI Tools (Claude, ChatGPT, Prompt Engineering, Cursor