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Architecting Scalable Microservices for Security-Critical Applications
- Architecting microservices for security-critical applications involves handling real-time telemetry, compliance scans, and threat detection tasks.
- High availability is crucial to prevent exposure or financial loss, with traceability being essential for audits and compliance.
- Core design principles include avoiding synchronous chains between services and utilizing messaging systems for resilience.
- Tenant isolation is key, requiring data to be isolated across various layers for multi-tenant platforms.
- Zero trust between services is emphasized, employing mTLS, token-based authentication, and access controls for strong security boundaries.
- Idempotency and replayability are important for security systems to ensure verifiable operations and audit trails.
- Observability is critical, with structured logs, distributed tracing, and real-time metrics being foundational for operational maturity.
- Successful usage metering framework for a SaaS security platform involved streaming billions of data points with a scalable, fault-tolerant architecture.
- Common pitfalls to avoid include tight coupling between services, underestimating compliance overhead, ignoring failure modes, and building one-size-fits-all services.
- Architecting for security-critical applications requires balancing scalability, compliance, and reliability while considering accountability, traceability, and trust.
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