--- title: Best Design Patterns posts — January 2026 | daily.dev description: The most upvoted Design Patterns posts from January 2026, curated by the daily.dev community. canonical: https://daily.dev/tags/design-patterns/best-of/2026/01 twitter:card: summary_large_image twitter:site: @dailydotdev og:url: https://daily.dev/tags/design-patterns/best-of/2026/01 og:type: website og:site_name: daily.dev og:title: Best Design Patterns posts — January 2026 | daily.dev og:description: The most upvoted Design Patterns posts from January 2026, curated by the daily.dev community. og:image: https://media.daily.dev/image/upload/s--VAY5ToZt--/f_auto/v1724209435/public/daily.dev%20-%20open%20graph --- # Best of Design Patterns — January 2026 1. 1 [](/posts/what-is-your-most-used-design-pattern-acjvt58qy "What is your most used design pattern") Article Krzysztof · 39w What is your most used design pattern A developer shares their experience with design patterns, noting that while many patterns exist, few are commonly implemented in practice. The Singleton pattern stands out as their most frequently used pattern, first encountered while working with Unity Engine for managing shared state across scenes, and later applied across various technologies including Java and TypeScript. The post invites others to share their most commonly used design patterns. 441 68 2. 2 [](/posts/software-design-principles-that-matter-9m18waeqk "Software Design Principles That Matter") Article The Polymathic Engineer · 38w Software Design Principles That Matter Three fundamental software design principles help build flexible, maintainable code. The Open-Closed Principle advocates for code that's open for extension but closed for modification, using interfaces to separate varying parts from stable ones. Dependency Injection reduces coupling by providing dependencies through constructors rather than creating them internally. Inversion of Control removes responsibilities from classes by letting frameworks control application flow while your code acts as plugins. Together, these principles reduce complexity and make code easier to test, extend, and maintain. 125 4 3. 3 [](/posts/stop-adding-a-service-layer-to-every-web-api-jvtnynqhq "Stop Adding a Service Layer to Every Web API") Video Zoran Horvat · 39w Stop Adding a Service Layer to Every Web API Service layers are often unnecessarily added to Web APIs. A service layer is only justified when orchestrating changes across multiple independent mutable systems (like a database and payment gateway). Most Web APIs write to a single database and read from multiple sources, making a service layer pure overhead. The one-to-one relationship between endpoints and service methods creates boilerplate code for DTO mapping, error translation, and localization without providing architectural value. The decision is simple: if your API doesn't orchestrate multiple transactional boundaries, skip the service layer and implement logic directly in endpoints. 97 10 4. 4 [](/posts/why-your-software-sucks-inheritance-pnnmgu4k8 "Why Your Software Sucks: Inheritance") Article Aaronontheweb · 37w Why Your Software Sucks: Inheritance Deep inheritance hierarchies create unmaintainable codebases through cognitive overload and "everything touches everything" architectures. The author examines real-world examples including a five-layer inheritance hierarchy for a payment page and an 866-line generic repository, demonstrating how preemptive framework design leads to rigid abstractions that resist change. The solution is to extract patterns after solving problems multiple times, prefer composition over inheritance, and remain skeptical of deep hierarchies beyond two or three layers. 28 3 [See all Design Patterns archives](/tags/design-patterns/best-of) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@graph":[{"@type":"CollectionPage","@id":"https://daily.dev/tags/design-patterns/best-of/2026/01#page","url":"https://daily.dev/tags/design-patterns/best-of/2026/01","name":"Best Design Patterns Posts — January 2026","description":"The most upvoted Design Patterns posts from January 2026, curated by the daily.dev community.","isPartOf":{"@type":"WebSite","url":"https://daily.dev"}},{"@type":"ItemList","@id":"https://daily.dev/tags/design-patterns/best-of/2026/01#items","numberOfItems":4,"itemListElement":[{"@type":"ListItem","position":1,"url":"https://daily.dev/posts/what-is-your-most-used-design-pattern-acjvt58qy","name":"What is your most used design pattern"},{"@type":"ListItem","position":2,"url":"https://daily.dev/posts/software-design-principles-that-matter-9m18waeqk","name":"Software Design Principles That Matter"},{"@type":"ListItem","position":3,"url":"https://daily.dev/posts/stop-adding-a-service-layer-to-every-web-api-jvtnynqhq","name":"Stop Adding a Service Layer to Every Web API"},{"@type":"ListItem","position":4,"url":"https://daily.dev/posts/why-your-software-sucks-inheritance-pnnmgu4k8","name":"Why Your Software Sucks: Inheritance"}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Tags","item":"https://daily.dev/tags"},{"@type":"ListItem","position":3,"name":"Design Patterns","item":"https://daily.dev/tags/design-patterns"},{"@type":"ListItem","position":4,"name":"Best of","item":"https://daily.dev/tags/design-patterns/best-of"},{"@type":"ListItem","position":5,"name":"January 2026"}]}]} ```