System Architecture Overview
Core Metrics
Availability
99.95%
↑ on target
P99 Latency
68ms
↓ good
Active Services
24
→ stable
Daily Requests
120M
↑ 8%
Error Rate
0.03%
↓ improved
Version
v4.2
↑ latest
Service Architecture
The system comprises 6 core microservices communicating via gRPC internally, unified behind an API Gateway for external access.
| Service | Lang | Instances | Team | Status |
|---|---|---|---|---|
| api-gateway | Go | 4 | Platform | running |
| user-service | Go | 3 | Accounts | running |
| order-service | Java | 6 | Commerce | running |
| payment-service | Java | 4 | Payments | running |
| notify-service | Node.js | 2 | Messaging | degraded |
| analytics-service | Python | 2 | Data | running |
notify-service is currently degraded — SMS channel switched to backup provider. Expected recovery: 2026-03-18.
Data Layer
Three-tier storage strategy partitioned by access frequency and consistency requirements.
Infrastructure
Deployed on private-cloud Kubernetes clusters spanning 3 availability zones for high availability.
2025-09 · v4.0
Completed K8s cluster migration. All services containerized, legacy VMs decommissioned.
2025-12 · v4.1
Istio service mesh deployed. mTLS encryption for all inter-service traffic. 100% distributed tracing coverage.
2026-02 · v4.2
HPA auto-scaling live. Peak traffic handling scales instances automatically up to 3× baseline.
2026-Q2 · v5.0 (planned)
Multi-cloud DR with AWS as hot standby. RTO target < 5 minutes.
Monitoring & Alerts
Observability stack built on Prometheus + Grafana. Alerts routed via PagerDuty with severity-based escalation.
notify-service P99 at 195ms — breaching SLA threshold of 150ms. Circuit breaker active. Root cause: upstream SMS provider network degradation.
Security & Compliance
Critical CVEs
0
↑ clear
Medium CVEs
3
in progress
mTLS Coverage
100%
↑ full
Audit Status
Pass
ISO 27001
3 medium CVEs (incl. CVE-2025-1234) have remediation plans. Patch deployment scheduled by 2026-03-25. Next full security scan: 2026-04-01.