API implementation

• RESTful, GraphQL, gRPC
• Web Server, Cloud
• IoC
• ORM/SQL
• Paginiation
• Batch Processing
• OpenAPI 3.0 Standards
• Versioning
• Problem deatils for HTTP APIS (RFC 7807)

Code-level architectures & Paradiams

• MVC, Layered
• Hexagonal, Clean
• Monolith
• Modular monolith
• Microservices
• Serverless
• Tactical DDD
• Multithreading
• Concurrency & Parallelism
• Optimistic & Pessimistic locking

Security

• Authentication, Authorization
• Cryptography
• Encryption Algorithms
• OWASP Top 10
• TLS/SSL
• OAuth2, JWT
• IEM, IDS, IPS

Distributed System

• Event-Driven
• Streaming
• Message Queue
• High availability
• Scalability

Database

• Query optimization
• Indexing
• Transaction & Isolation levels
• Sharding & Partitioning
• Replication
• Cluster

Performance Tuning

• Caching
• Rate-limiting
• Throttling
• Load balancing
• Fault Tolerance

DevOps

• CI/CD
• Containerization
• Orchestration
• Automation
• SLA, SLOs, SLIs
• YAML

Observability

• Logging, monitoring and tracing
• Profiling & optimization
• Alearting
• Dashboard

Miscellaneous Microservices topics

• API Gateway
• Reverse proxy
• Circuit breaker Pattern
• Retry/back off patterns
• Background jobs/Scheduling