API Integrations & Microservices
Disconnected Systems? APIs & Microservices Connecting Them
API Integrations & Microservices
API Integrations & microservices platform: design-first with OpenAPI/AsyncAPI, OAuth2/OIDC security and SRE SLO ≥ 99.95%, low latency and end-to-end tracing.
Volver a Programming
Overview
We design and operate API integrations and microservices with a design-first approach and SRE-style reliability. We start from versioned OpenAPI/AsyncAPI contracts, API gateways with rate limiting, quotas, circuit breakers and per-route caching; we manage service discovery and traffic shaping through a service mesh (mTLS, retry and timeout policies) and practice zero-downtime deployments via blue/green and canary. We apply idempotency keys, the outbox pattern and sagas for consistency across distributed flows. We secure with OAuth2/OIDC, signed JWT, secret management and per-consumer audit. End-to-end observability with distributed tracing (OpenTelemetry), correlation IDs, per-endpoint metrics and SLI/SLO aligned to business. Outcome: predictable integrations, controlled latency and availability above 99.95% with audit-ready evidence.
Protocols: REST, GraphQL, gRPC and events (AsyncAPI) over Kafka, RabbitMQ or SQS. API gateways (Kong, Apigee, NGINX), service mesh (Istio/Linkerd), verified webhooks and websockets for real-time. Integration with ERP/CRM, payments, identity (Keycloak/Azure AD), S3 storage and search engines. Schema registry, backward/forward compatibility and CI schema validation.
Continuous telemetry: RPS, p50/p95/p99 latency, error rate by family (2xx/4xx/5xx), saturation, payload size, queue and consumer lag, retries and timeouts. SLI/SLO per domain, error budgets, traces with spans per hop and dashboards that correlate deployments with behavior changes. Real-time analytics to detect spikes and route heatmaps.
Actionable alerts: 5xx spikes, auth anomalies, SLO breaches, sustained throttling, open circuits, schema drift and DLQ growth. Prioritized by consumer impact, routed to on-call with runbooks for diagnosis and immediate mitigation.
Incident response
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P1
Critical gateway outage or blocked queue. Freeze releases, activate failover, emergency rate limits, circuit breaker and supervised rollback or hotfix.
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P2
Latency degradation or intermittent error. Canary off, lower concurrency, retry with backoff and jitter, and use a feature flag to isolate the change.
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Post-mortem
Blameless and evidence-based: root cause, trace-aligned timeline, preventive actions (contract tests, limits, chaos drills) and verified closure.
We record MTTR, affected SLOs, impacted consumers and learnings. All flows back into runbooks and automation.
Self-healing
We automate recovery while keeping humans in control at key milestones; every action is audited.
Key capabilities
We model contracts before code, generate stubs, SDKs, live docs and contract tests. Semantic versioning, changelogs and guided deprecations for smooth evolution.
OAuth2/OIDC, mTLS, JWT with scopes, rotatable API keys, secret management and WAF. Ingress/egress policies, rate plans and per-consumer audit.
Bulkheads, circuit breakers, timeouts and retries with backoff. Idempotency keys, outbox and saga to achieve eventual consistency without losing business integrity.
Well-bounded domains, event-driven flows, orchestration or choreography based on coupling, service discovery and a service mesh for traffic, security and consistent observability.
OpenTelemetry, correlation IDs, smart sampling and exemplars that connect metrics, logs and traces. Business-aware dashboards and alerts with actionable context.
Compression, HTTP caching, ETag, stale-while-revalidate, layered caches and response shaping. Per-route profiling and optimization driven by data.
Developer portal with client onboarding, API keys, examples, SDKs and sandbox. Feedback loop and adoption metrics to improve the product.
Schema versioning, a schema registry, compatibility rules and zero-downtime migrations. Clear policies for breaking changes and adoption windows.
Operational KPIs
| Metric | Target | Current | Comment |
|---|---|---|---|
| API availability | >= 99.95% | 99.97% | Domain SLOs with tight error budgets. |
| p95 latency | <= 200 ms | 180 ms | Per-route optimization and layered cache. |
| Error rate | <= 0.50% | 0.35% | Stable contracts, limits and healthy retries. |
| Consumer lag (events) | <= 5 s | 3 s | Auto-scaling, partitioning and backpressure. |
| Compatibility violations | 0 / 30d | 0 / 30d | Schema registry and contract tests. |
Summary
We connect systems through governed, secure and observable APIs and microservices: OpenAPI/AsyncAPI contracts, availability SLO >= 99.95%, controlled p95 latency and resilience by design. Ask for a quick audit and receive a prioritized improvement plan.
We set up a pilot API Gateway and enable distributed tracing from day one.