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.
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.
Stable contracts and contract tests to catch breaking changes before production.
API catalog, developer portal, generated SDKs and consumer rate plans.
Version governance, guided deprecation and no-downtime migrations.
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
P1
Critical gateway outage or blocked queue. Freeze releases, activate failover, emergency rate limits, circuit breaker and supervised rollback or hotfix.
P2
Latency degradation or intermittent error. Canary off, lower concurrency, retry with backoff and jitter, and use a feature flag to isolate the change.
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
Auto-scaling, circuit breaker with fallback and graceful degradation.
Retries with exponential backoff and idempotency keys to avoid duplicates.
Safe reprocessing from DLQ, cache warm-up and active health checks with controlled restart.
We automate recovery while keeping humans in control at key milestones; every action is audited.
We model contracts before code, generate stubs, SDKs, live docs and contract tests. Semantic versioning, changelogs and guided deprecations for smooth evolution.
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.
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.
