| Area | Required Expertise |
| C# and .NET | Expert C# 12 and .NET 8, ASP.NET Core, .NET, multithreading, concurrency, CLR internals, design patterns, clean architecture, enterprise integration patterns, and automated testing. |
| Microservices | Service decomposition, DDD, API design, event-driven architecture, resiliency, distributed data, service discovery, configuration, and backward-compatible evolution. |
| Messaging | Kafka, SQS, SNS, Event Bridge or RabbitMQ; delivery semantics, schema evolution, ordering, replay, dead-letter handling, and idempotent consumers. |
| Data | PostgreSQL/MySQL/Oracle plus DynamoDB or MongoDB; modeling, query tuning, indexing, partitioning, transactions, replication, caching, and data lifecycle. |
| Cloud and DevOps | AWS architecture, Docker, Kubernetes, CI/CD, Terraform or CloudFormation, observability, automated testing, deployment strategies, and SRE practices. |
| Security | Application, API and cloud security; OAuth2/OIDC/JWT, IAM, encryption, secrets, threat modeling, vulnerability remediation, and secure SDLC. |
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