Microservices Architecture | AWS-Certified Cloud Solutions

Microservices done right

Microservice architecture offers real benefits — independent scaling, faster deployment cycles, better fault isolation, and the ability for multiple teams to work in parallel without stepping on each other. But those benefits only materialise if the services are designed well from the start.

Poorly decomposed microservices can be worse than the monolith they replaced: distributed system complexity with none of the operational simplicity of a well-maintained single codebase. We apply domain-driven design principles to ensure services are structured around meaningful business boundaries, not arbitrary technical ones.

Service design and decomposition

We work with your team to identify domain boundaries using event storming and context mapping — establishing which concepts belong together and where the natural seams in your system lie. This informs service decomposition that minimises the need for cross-service transactions and keeps inter-service contracts stable.

Infrastructure and observability

Microservices require robust infrastructure: API gateways, service meshes, container orchestration, and distributed tracing. We design and build this infrastructure as part of the service architecture — not as an afterthought — ensuring you have full visibility into how your services are performing and where failures are occurring.

Migrating from a monolith

Not every microservice project starts from scratch. We have extensive experience decomposing existing monolithic applications, using the strangler fig pattern and other incremental migration strategies to extract services without disrupting live operations. We prioritise the extractions that deliver the most value earliest.

Enterprise microservices architecture designed for scale, resilience, and rapid innovation

Modern software demands agility. Monolithic architectures can no longer keep pace with continuous delivery, independent team scaling, and the need for technology diversity. Our AWS Solutions Architect-certified teams design and implement production-ready microservices architectures across AWS, Azure, and Google Cloud Platform — enabling faster releases, better fault isolation, and sustainable long-term evolution of your software estate.

Whether you're decomposing a legacy monolith, building a greenfield digital platform, or modernising enterprise systems, we deliver domain-driven microservices with the infrastructure, governance, and observability needed for mission-critical operations.

Strategic microservices architecture for operational excellence

We architect distributed systems that balance autonomy with coherence — ensuring teams can ship independently while maintaining system-wide reliability, security, and performance.

Our microservices capabilities include:

• Domain-driven service decomposition — identifying bounded contexts and service boundaries aligned to your business domains
• Event-driven architectures — asynchronous messaging patterns using Kafka, RabbitMQ, AWS EventBridge, Azure Service Bus, Google Pub/Sub
• API gateways & service mesh — centralized routing, authentication, rate limiting, circuit breakers with Kong, Istio, AWS App Mesh, Azure API Management
• Container orchestration — Kubernetes (EKS, AKS, GKE), Docker Swarm, AWS ECS/Fargate for scalable, self-healing deployments
• Data architecture patterns — database-per-service, event sourcing, CQRS, distributed transactions with Saga patterns
• Observability & distributed tracing — Prometheus, Grafana, Jaeger, AWS CloudWatch, Azure Monitor, Google Cloud Operations for end-to-end visibility
• CI/CD pipelines for microservices — automated testing, canary deployments, blue-green rollouts, GitOps workflows

Certified cloud expertise across AWS, Azure & Google Cloud

Our AWS Solutions Architect-certified engineers bring deep multi-cloud experience to every microservices engagement:

AWS Microservices Architecture

• Compute — ECS, EKS, Fargate, Lambda for serverless patterns
• Messaging — EventBridge, SQS, SNS, Kinesis for event-driven flows
• Data — RDS, Aurora, DynamoDB, DocumentDB with per-service data ownership
• Networking — VPC peering, Transit Gateway, PrivateLink for secure service-to-service communication
• API management — API Gateway, App Mesh, Cloud Map for service discovery

Azure & Google Cloud Platform

• Azure — AKS, Azure Functions, Service Bus, Cosmos DB, Application Gateway, Front Door
• Google Cloud — GKE, Cloud Run, Pub/Sub, Cloud SQL, Spanner, Cloud Load Balancing, Apigee
• Multi-cloud patterns — portable containerized workloads, cross-cloud disaster recovery, hybrid deployments

We design for cloud-agnostic portability where appropriate, while leveraging cloud-native managed services for operational efficiency.

Migrating from monolithic systems — the strangler fig pattern

Legacy modernization is rarely a "big bang" rewrite. We employ proven incremental migration strategies:

• Strangler fig pattern — gradually replace monolith features with microservices while keeping the system operational
• Anti-corruption layers — protect new services from legacy data models and business logic
• Parallel run & validation — run new services alongside the monolith, comparing outputs to ensure correctness
• Feature toggles — switch traffic between monolith and microservices incrementally, with instant rollback
• Shared databases to service-owned stores — migrate data ownership without downtime using dual-write and CDC patterns

We've successfully decomposed enterprise platforms processing millions of transactions daily — replacing rigid monoliths with resilient, independently deployable services that accelerate feature delivery and reduce operational risk.

Infrastructure, security & governance for production microservices

Distributed systems introduce new operational challenges — we build the foundational infrastructure to manage them:

Infrastructure essentials

• Service discovery & load balancing — Consul, Eureka, AWS Cloud Map, Kubernetes Services
• API versioning & backwards compatibility — semantic versioning, contract testing, schema registries
• Centralized configuration — AWS Systems Manager, Azure App Configuration, Google Secret Manager, Consul KV
• Distributed logging & monitoring — centralized log aggregation with ELK, Splunk, CloudWatch Logs; metrics dashboards with Datadog, New Relic

Security & compliance

• Zero-trust networking — mutual TLS, service-to-service authentication with OAuth2/JWT
• Secret management — AWS Secrets Manager, Azure Key Vault, HashiCorp Vault
• Network policies — Kubernetes network policies, security groups, private subnets
• Compliance & audit trails — CloudTrail, Azure Activity Log, Google Cloud Audit Logs

Resilience patterns

• Circuit breakers & retries — Hystrix, Resilience4j, Polly for fault tolerance
• Rate limiting & backpressure — protect downstream services from overload
• Chaos engineering — proactive failure injection with Chaos Monkey, AWS Fault Injection Simulator
• Disaster recovery — multi-region deployments, automated failover, backup and restore strategies

Why choose microservices architecture from iCentric?

Proven track record — we've architected and delivered microservices platforms for fintech, healthcare, logistics, and SaaS companies, handling millions of users and high-throughput transactional workloads.

AWS-certified expertise — our AWS Solutions Architect-certified teams understand Well-Architected Framework principles and apply them to every engagement: operational excellence, security, reliability, performance efficiency, and cost optimization.

Multi-cloud fluency — we design architectures that leverage the best-of-breed services across AWS, Azure, and Google Cloud, avoiding vendor lock-in while maximizing cloud-native capabilities.

End-to-end delivery — from domain modeling and service boundary design to production deployment and operational runbooks, we deliver complete solutions, not just architectural diagrams.

Sustainable modernization — we favor incremental, low-risk migrations over big-bang rewrites, ensuring your business continues operating while we transform the underlying architecture.

Our microservices delivery process

1. Discovery & Domain Modeling

We work with your product and engineering teams to understand business domains, identify bounded contexts, and map service boundaries. We analyze your existing architecture, traffic patterns, and scaling challenges to design a pragmatic decomposition strategy.

2. Architecture Design & Planning

We produce detailed architecture diagrams, data flow models, and infrastructure blueprints. We define service contracts (APIs, events), select the technology stack, and establish observability and security standards. We document migration phases with clear success criteria.

3. Agile Implementation Sprints

We build in two-week sprints with continuous integration and automated testing. Each sprint delivers working services deployed to staging environments. We conduct sprint reviews with stakeholders, demonstrating progress and incorporating feedback.

4. Production Migration & Optimization

We execute phased rollouts using feature toggles and canary deployments. We monitor service health, latency, and error rates in real time, ready to roll back instantly if issues arise. Post-launch, we optimize for cost efficiency and performance based on production telemetry.