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