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bsayli/README.md

👋 Hi, I'm Barış Saylı

Software Architect · Java 21, Spring Boot 3.x, OpenAPI, Keycloak · Microservices

Designing production-grade systems with hexagonal architectures, type-safe API contracts, and secure service-to-service communication. Passionate about evolving developer experience with code generation, reusable SDKs, and clean architectural boundaries.

🔭 Focus Areas

  • Microservices & DDD
  • OpenAPI & Client Code Generation
  • Type-Safe API Design (Envelope & Generics Patterns)
  • Identity & Access (Keycloak, OAuth2, JWT)
  • Licensing Frameworks (issue/validate, SDK/CLI)
  • Cloud & DevOps (Docker/K8s, CI/CD)
  • Observability (OTel, Grafana, Sentry)

📂 Featured Projects

spring-boot-openapi-generics-clients

Type-safe generic API clients with OpenAPI Generator + custom Mustache templates, adoption-ready for real-world projects.

Java 21 · Spring Boot 3.4 · OpenAPI Generator 7.x

licensing

End-to-end licensing framework with Spring Boot 3 — secure key generation, detached signatures, token validation, SDK & CLI. Delivers full license lifecycle with Keycloak integration and Redis caching.

Java 21 · Spring Boot 3.5 · Keycloak 26.x · Redis 8.x · Maven · Docker · Caffeine · JWT

codegen-springboot-initializr

A hexagonal (ports & adapters) Spring Boot project initializer. Generates production-ready scaffolding with Maven, .gitignore, application.yml, starter & test classes, and ready-to-use zip export.

Java 21 · Spring Boot 3.5 · FreeMarker

🤝 Collaboration

💼 Open to remote opportunities as a Software Architect / Backend Lead
🔑 Expertise in Java 21, Spring Boot 3.x, Microservices, OpenAPI, Keycloak, Security (OAuth2, JWT), Cloud & CI/CD
📬 Reach me via LinkedIn or [email protected]

📈 My Stats

GitHub stats for bsayli Top languages used by bsayli

GitHub contribution streak for bsayli

🚀 Focused on Spring Boot, OpenAPI (Generator 7.x), and Licensing frameworks — with highly active contributions over the past year.

🛡 License

All public repositories are under the MIT License unless otherwise noted.

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  1. spring-boot-openapi-generics-clients spring-boot-openapi-generics-clients Public

    End-to-end generics-aware OpenAPI clients — unified { data, meta } responses with RFC 9457 Problem Details, powered by Spring Boot 3.4 + Java 21.

    Java 10

  2. codegen-springboot-initializr codegen-springboot-initializr Public

    A hexagonal (ports & adapters) Spring Boot project initializer that generates production-ready code scaffolding with Maven, .gitignore, application.yml, starter & test classes, and a ready-to-use z…

    Java

  3. licensing licensing Public

    Modern licensing framework with Spring Boot 3 — featuring secure key generation, encryption, token validation services, SDK & CLI tools. Integrated with Keycloak and ships with Docker for easy setup.

    Java