Accurate and Fast — Declarative UI with Static Typing for a New Level of Productivity

Challenge

Template-based SSR reveals critical limitations as projects scale, impacting maintainability, collaboration, and extensibility.

Runtime errors and testing difficulties caused by template–data separation

Limited reusability and high cost of scaling UI components

Readability issues from nested fragments, conditionals, and loops

Lack of static typing — no reliable auto-completion or safe refactoring

Mismatch between backend and UI patterns leading to collaboration friction

Solution

Kosmos replaces fragile templates with a declarative, component-driven DSL. By aligning backend and UI in one consistent flow, it enables small, fast, and executable development cycles — perfectly suited for real-world projects.

Static Typed DSL: Define HTML safely in Java code

Seamless Spring Integration: Unified flow from Controller → Component → Response

Atomic Design Support: Build reusable components (Forms, Tables, Cards)

IDE Productivity: Auto-completion, type checking, and safe refactoring

Template-Free: Design entire pages in Java with structural consistency

Streaming SSR + WebSocket: Optimized for real-time rendering

Integrated DSL-level support for validation, i18n, and accessibility

Tech Stack

The Result

Core Services

• Building management systems, portals, and web apps with Kosmos
• Migration consulting from Thymeleaf to Kosmos
• Designing UI component libraries (Forms, Tables, Modals)
• Implementing Java-based authentication, validation, and i18n
• Designing real-time UIs with Streaming SSR and WebSocket
• Full deployment pipelines with CI/CD, Docker, and performance tuning