Zenith Pathway is a course that helps you move from "writing code" to "building resilient systems" in Ruby. 🏔️After Quantum Slate, you know how to make code fast and efficient. Now it's time to make it understandable, testable, and ready for team growth and project scaling: domain-driven design basics, clean architecture, design patterns, and principles used in large Ruby projects. What’s included9 modules with real architecture examples, code templates, refactoring exercises for entire modules, and structure-building tasks.Module 1: Clean Code & SOLID in RubySingle Responsibility, Open-Closed, Liskov etc. • applying in dynamic language • code smells and removalModule 2: Domain-Driven Design basicsUbiquitous Language • Entities, Value Objects, Aggregates • Repository pattern in pure RubyModule 3: Clean / Hexagonal ArchitectureLayers: domain, application, infrastructure, presentation • dependency inversion in Ruby • folder structure examplesModule 4: Design Patterns in Ruby styleStrategy, Factory, Builder, Decorator, Observer • adapting GoF patterns to Ruby (duck typing + blocks)Module 5: Test-Driven Development practiceRSpec advanced: matchers, shared examples, stubs/mocks • outside-in TDD • edge case testingModule 6: Event Sourcing & CQRS basicsSimple event sourcing implementations • command/query separation • why useful for complex domainsModule 7: Refactoring to clean structureBreaking monolithic classes into services/interactors • using dry-monads or result objectsModule 8: Scalable Ruby without RailsMicroservices-friendly design • message buses (dry-events, simple pub/sub) • background jobs patternsModule 9: Final project exerciseBuilding a full domain module (e.g. booking system or inventory) with clean architecture and tests Who this course is forSuitable if you: already write medium/large projects and feel structural chaos want to move from "scripts" to professional architecture are ready to invest time in exercises requiring multiple code rewrites for cleanliness 🌟 Not suitable if you: are not yet confident with concurrency and profiling are looking for quick tricks without deep code reorganization What you will studyHow to apply SOLID and Clean Code principles in RubyDomain-Driven Design basics and business domain modelingHow to build hexagonal/clean architecture without frameworksHow to adapt classic design patterns to RubyHow to write reliable tests and use TDD for architecture About the authorDeveloper with over 8 years of Ruby experience. Worked on enterprise-level systems where architecture and maintainability were critical for teams of 10+ developers. 🏛️ 30-day refund policyIf within 30 days after purchase of paid tariff you feel the materials do not suit you — write us for refund (for Free Pathway not applicable).