🧑💻 Rei Reltroner (Raidan)
Backend / System Architect Engineer
Authentication Systems · Modular ERP · Long-Term Maintainability
Founder of Reltroner Studio — an independent engineering practice focused on building production-style internal systems with clear boundaries, strong guarantees, and disciplined scope control.
🧭 Professional Orientation
I focus on systems that must not fail silently.
My work emphasizes:
- centralized authentication (SSO, OIDC, trust delegation),
- modular ERP-style architectures,
- failure isolation,
- and long-term sustainability over feature velocity.
I do not optimize for demos or short-term novelty.
I optimize for architectural correctness, auditability, and future-proof decisions.
🧠 Core Principles
-
Boundary Discipline
Every system has explicit responsibilities. Auth is centralized once — never duplicated again. -
Correctness Over Speed
A system that is slow to build but hard to break is preferable to a fast system that leaks complexity. -
Freeze What Must Not Change
Critical layers (authentication, trust boundaries) are frozen once validated to prevent regressions. -
Documentation Is Part of the System
Decisions, trade-offs, and failure modes are written — not assumed.
🔧 Technical Focus
Backend & Architecture
- PHP 8+, Laravel 12
- RESTful APIs
- Multi-repository modular architecture
- ERP-style domain modeling
Authentication & Security
- Keycloak (OIDC, Authorization Code Flow)
- Centralized Identity Provider
- Short-lived JWT delegation
- Zero-trust service boundaries
- Session isolation (no shared cookies, no re-auth)
Data & Reliability
- MySQL
- Schema design & migrations
- Audit logging
- Transaction integrity
Testing & Delivery
- PHPUnit (feature & unit tests)
- GitHub Actions (CI)
- Production-style debugging & root cause analysis
Documentation
- Markdown-driven architecture docs
- Phase freeze & audit reports
- Explicit “what was not done — and why”
📁 Selected Work
Reltroner ERP (Ongoing)
A modular ERP platform built entirely solo, designed to mirror real enterprise constraints.
Highlights:
- Centralized SSO Gateway using Keycloak
- Finance module integrated as a passive SSO consumer
- No shared sessions, no duplicated auth logic
- Explicit trust delegation via short-lived tokens
- Public audit reports & frozen authentication phases
This project is intentionally minimal in features but high in systemic complexity, focusing on long-term maintainability rather than surface polish.
📄 Curriculum Vitae (Notion)
For a structured, up-to-date CV with detailed experience and artifacts:
👉 Notion CV:
https://immense-corn-a5c.notion.site/Raidan-Rei-CV-2f786ce37ade8083a9a5d0bfee103913?pvs=143
🤝 Collaboration & Roles
I am open to:
- Backend / Platform / System Architect roles
- Authentication / IAM-focused work
- Internal tools & ERP platforms
- Remote or async-first collaboration
I work best in environments that value: clarity, trust boundaries, written communication, and long-term thinking.
✉️ Contact
- Email: studio@reltroner.com
- Website: https://www.reltroner.com/blog/for-recruiters
- GitHub: https://github.com/Reltroner
“I don’t optimize for visibility.
I optimize for systems that remain correct long after the excitement fades.”
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