Grokking Microservices Design Patterns

It is a pattern by pattern guide to building microservices. Each pattern gets its own chapter that sets out the problem first, then the pattern, then its architecture, its trade-offs, and worked system design examples from real companies.

Backend and platform engineers working on or moving toward a microservices architecture, engineers preparing for system design interviews where microservices come up, and tech leads who have to justify a decomposition to other people. It suits anyone who has heard these pattern names in design reviews and wants to stop nodding along.

This course is the pattern catalogue: every pattern explained in depth on its own terms. The other course is decision-led and interview-shaped, built around whether to use microservices at all, where the boundaries go, how services communicate, and how to defend those calls out loud under questioning. If you want to know what the saga pattern is and when it applies, this is the one. If you want to be argued with about service boundaries in a mock interview, that is the other one. They complement each other rather than overlap.

Sixteen: strangler fig, API gateway, backends for frontends, service discovery, circuit breaker, bulkhead, retry, sidecar, service mesh, database per service, saga, transactional outbox, event-driven architecture, CQRS, event sourcing, and configuration externalization. Each gets a full chapter rather than a paragraph, which is what allows the trade-offs and failure modes to be covered rather than just the definition.

That is the part most courses skip, so five chapters build on each other here. Database per service gives each service its own store and takes away cross-service joins and transactions. Sagas put a multi-service change back together with compensating actions. The transactional outbox makes sure an event is really published when the data changes. CQRS separates the read model from the write model, and event sourcing stores the history rather than the current state.

No, but you should understand how a web service talks to another one and roughly what a queue and a load balancer do. The course starts each pattern from the problem it solves, so you do not need to have hit that problem in production to follow the reasoning, though it lands harder if you have.

Yes. Every pattern chapter carries short Java examples, and the CQRS chapter ends in a runnable exercise you can edit and run in the browser. The code is there to make the mechanism concrete rather than to teach a framework, so the weight of each chapter still sits on the architecture and the trade-offs, not on a Spring or Go walkthrough.

Every pattern chapter ends with a flashcards deck and an adaptive chapter assessment. Each assessment draws from a bank of questions spread across easy, medium and hard, and picks what to ask based on how you are doing, so retaking it gives you a different set. The questions test judgment, such as what a pattern costs or how it behaves in a crash, rather than definitions you can memorize.

Yes. Naming the right pattern is one thing, but the part that scores is explaining what it costs, and the trade-off and failure-mode material here is aimed at exactly that. Being able to say why you would use a bulkhead rather than only a circuit breaker, or what a saga gives up in exchange for avoiding two-phase commit, is the level these interviews probe at.

Each pattern chapter opens with the problem, introduces the pattern, walks through its architecture, then covers a worked example, its performance implications, and how it behaves when things go wrong. Most chapters then give system design examples from real company architectures, and every pattern chapter ends with a flashcards deck and a chapter assessment.

Text-based, with architecture diagrams throughout. Since the material is comparative, weighing one pattern against another, having the diagrams and the trade-off lists side by side on a page is more useful than a linear video.

Yes. Design Gurus issues a certificate once you have completed the course, and you can share the link directly or add it to your LinkedIn profile.