Grokking Modern Software Architecture Styles

The course is written for junior and mid-level software engineers who build and maintain backend systems and want to take part in structural decisions. It assumes three things. You know one programming language, you know what an HTTP request, response, and status code are, and you can read a SQL query. You do not need prior experience with distributed systems, message brokers, a cloud provider, or a framework. Every other term is defined in the lesson where it first appears.

No. The course teaches software architecture for daily work. You learn to recognize the decisions built into the system you maintain, propose a change in terms your team can check, and record the result. The lessons, capstones, and assessments are about building and changing real systems. If you are preparing for the system design round, Grokking the System Design Interview is the course for that.

The fifteen styles, each with its own lesson, are Monolith, Layered, N-Tier, Client-server, Microservices, SOA, Event-driven, Pipe-and-Filter, Microkernel, Hexagonal, Clean Architecture (Onion), Broker, Peer-to-Peer, Space-Based, and Serverless. The lessons fall into four groups. The first covers the basic structures of one application, and the second splits a system into services that communicate through calls or events. The third organizes code and processing, and the fourth addresses distribution and scale.

There is practice at three levels. Every style lesson ends with an adaptive assessment drawn from a question bank. Most questions describe a situation and ask which design or change fits it, and every option comes with an explanation. Two final assessments at the end of the course cover the fundamentals, the styles, and the decisions chapter. Many of their questions combine ideas from several lessons. Three capstone projects ask you to review and refactor an existing application, design a new product under fixed constraints, and respond to changed requirements. Each capstone gives a reference solution and a self-review rubric so that you can check your own work.

The code examples are written in Python, and most of them have Java, JavaScript, C#, and Go versions that you can switch to inside the lesson. The programs are small. Each one shows the parts of a style and how they communicate, such as monolith modules behind their interfaces or a producer and a consumer of events. A few lessons, such as Peer-to-Peer, rely on diagrams instead of code.

The three capstones end the decisions chapter and ask you to apply the whole course. In the first, you review the order workflow of the food-delivery app, rank its findings against one measurable requirement, and refactor it within a fixed budget of engineer-days. In the second, you design a new learning product for a team of four engineers with a fixed launch date, from constraints and contracts to deployment. In the third, you respond when that product's requirements change after launch, and you decide which changes need a structural answer. Each capstone states the task and its deliverables, then gives a reference solution and a self-review rubric. Complete the task before you read the solution, because comparing your own answer with it is where most of the learning happens.

The fundamentals lessons, and the decisions lessons up to the first capstone, use one running example: a food-delivery app with customer, restaurant, and courier apps that call one backend. The lessons return to that app and change one part of it at a time, so each idea builds on the one before it. You draw its boundaries, measure its quality attributes, choose between designs for it, and review its order workflow in the first capstone. The style lessons apply each style to other concrete systems, such as an online store, a payment system, or a concert ticketing site.

Grokking the System Design Interview prepares you for the system design round. It teaches a repeatable framework for answering an open-ended design question and works through real design problems such as a URL shortener or Instagram. This course is about the structure of the systems you build and maintain at work. It teaches each architecture style with its trade-offs, then the process of choosing, recording, and reviewing a decision on a running system. The two courses share vocabulary, such as microservices and event-driven design. This one shows the code inside the application, with decision records and capstones, and it is not organized around interview questions.

System Design Fundamentals teaches the building blocks that large systems are made from: load balancers, caches, CDNs, databases, partitioning, and replication. It also covers the ideas that tie them together, such as the CAP theorem. This course asks the next question: how the parts of an application are arranged, what each arrangement costs, and which decisions are expensive to change. It defines every infrastructure term it uses, such as message broker or read replica, so you can take it without the fundamentals course. Take System Design Fundamentals first, or alongside it, if you want each building block explained from the start.

Read the fundamentals lessons first, in order. Every style lesson judges its style by the measures they define: the quality attributes it improves or harms and the constraints it fits. Then read the style lessons in order, or open the lesson for a style your team is considering now and read the earlier lessons it refers to. Finish with the decisions chapter, complete each capstone before you read its reference solution, and take the two final assessments at the end. The course is self-paced, and the platform tracks your progress so you can return to any lesson.

The course is text-based. Every lesson is written, with diagrams wherever a picture explains more than a paragraph. The style lessons add short code examples and an adaptive assessment at the end. There are no video lectures, so you can read at your own pace and return to any section, such as a lesson's vocabulary list, whenever you need it.

You can choose between a lifetime access purchase for this course or an annual subscription that unlocks all current and future Design Gurus courses. Both options include a certificate of completion, which Design Gurus issues once you finish all course modules.