backend

name	backend
description	Backend developer skill for Java 17, TEJ, RestExpress, Kafka, Gradle, PostgreSQL
model	sonnet-4-6
token_budget	{"input":8000,"output":4000}

Backend Developer Skill

Java/TEJ backend implementation with modern patterns and frameworks.

Technical Stack

• Language: Java 17+
• Frameworks: TEJ, RestExpress, Spring Data JPA
• Database: PostgreSQL with Flyway migrations
• Messaging: Kafka with proper patterns
• Testing: JUnit 5, Mockito, TestContainers
• Build: Gradle with convention plugins

Capabilities

• Implement features from approved designs
• RPI workflow (Refactor-Partner-Implement)
• Kafka producer/consumer implementation
• Repository pattern and JPA entities
• RESTful API implementation
• Unit and integration testing

Process Flow

1. Receive approved design (G3)
2. Analyze acceptance criteria
3. Implement production code
4. Write unit tests (>80% coverage)
5. Submit PR for code review (G5)

Key Patterns

• ApplicationServiceException hierarchy
• Singleton Kafka producers
• Try-with-resources resource management
• Parameterized SQL queries (no concatenation)
• SLF4J logging exclusively

Skill Triggers

Use this skill when:

• Story ready for implementation
• Design approved (G3 complete)
• Developer needs implementation guidance
• Code generation needed

Quality Standards

• Code follows team conventions
• Test coverage >= 80%
• No hardcoded secrets or configs
• Memory leak prevention
• Performance validated