Production-ready backend tools for Java engineers building scalable systems.

We build enterprise-grade libraries and reference architectures focused on:

• 🔐 Identity & Access Management (Keycloak, Cognito)
• 📊 Audit Trails & Observability
• 🧩 Modular Persistence & Query Systems
• 📡 Event-Driven Architectures (Kafka)

Production-ready audit trail system built on Hibernate Envers.

• Query audit logs easily
• Designed for real-world systems (not just demos)
• Extensible & modular

👉 Coming soon / private modules available

Advanced Spring Data JPA extensions.

• Dynamic query specifications
• Flexible projections
• Cleaner repository abstraction

Event-driven communication made simple.

• Vertical slice architecture support
• Simplified messaging patterns

We provide real-world IAM implementations using:

• Keycloak (multi-tenancy, SPIs)
• AWS Cognito integrations

• Spring Cloud Microservices (Gateway, Eureka, Config) :contentReference[oaicite:2]{index=2}
• Secure React + Keycloak apps
• Dockerized infra setups

Some advanced features are available as private or paid modules, including:

• Advanced audit querying
• Multi-tenant IAM systems
• Enterprise extensions

👉 https://www.czetsuyatech.com

Built by a Java backend engineer with 15+ years experience in:

• Fintech
• Payment systems
• Cybersecurity
• Distributed systems :contentReference[oaicite:3]{index=3}

If you're building:

• SaaS platforms
• Microservices
• Secure enterprise apps

This org gives you battle-tested building blocks instead of reinventing everything.

If this helps you, consider supporting:

• GitHub Sponsors
• Sharing the projects