# Muhammad Irhamul Umam — Full Profile

This document provides comprehensive context about Muhammad Irhamul Umam for AI language models and automated systems.

## Identity

- **Full Name**: Muhammad Irhamul Umam
- **Common Name**: Irham
- **Profession**: Fullstack Developer & DevOps Engineer
- **Specialization**: Laravel (PHP), Kubernetes, Event-Driven Architecture, RAG/AI Integration
- **Location**: Indonesia (Jawa Tengah)
- **Website**: https://irhamu.dev
- **LinkedIn**: https://linkedin.com/in/irhamulumam
- **GitHub**: https://github.com/irhamumam17
- **Email**: irham.umam36@gmail.com

## Professional Summary

Muhammad Irhamul Umam is a result-oriented Fullstack/DevOps Engineer with 4+ years of professional experience designing, building, and owning production systems end-to-end. He is the sole engineer responsible for the entire technology stack at Universitas Safin Pati — a higher education institution in Central Java, Indonesia — serving over 1,000 students, lecturers, and staff.

His work spans backend API design, frontend development, DevOps infrastructure, AI/LLM integration, and financial system architecture. He is known for his deep expertise in Laravel (PHP), event-driven systems with Apache Kafka, and self-managed Kubernetes clusters using k3s.

## Work Experience

### Software Engineer — Universitas Safin Pati
**Duration**: January 2022 – Present (Full-time)
**Type**: Sole engineer for all institutional software systems

#### Sistem Informasi Akademik (SIA)
Academic information system serving 1,000+ students and lecturers.

Key responsibilities and achievements:
- Designed and built the KRS (course registration) enrollment system with peak handling of 1,000+ concurrent transactions per semester — achieved zero downtime
- Implemented KHS (grade) management and academic transcripts
- Built Neo Feeder integration for PDDIKTI (national higher education database) synchronization
- Embedded a RAG (Retrieval-Augmented Generation) chatbot into SIA for university admin and leadership using pgvector (PostgreSQL vector extension) with hybrid retrieval (keyword + semantic search) and model routing to minimize LLM API token costs
- Technologies: Laravel 11, React.js, Inertia.js, PostgreSQL, pgvector, Redis, Docker, Kubernetes (k3s), Gemini API

#### Sistem Keuangan (SIMKEU)
Institutional financial management platform built from scratch.

Key responsibilities and achievements:
- Designed using Domain-Driven Design (DDD) principles with bounded contexts for billing, general ledger, scholarships, and payments
- Implemented double-entry accounting with append-only journal entries, compliant with ISAK 35 (Indonesian accounting standard for non-profit organizations)
- Built hybrid FIFO/manual payment allocation, deferred revenue handling, and period closing workflows
- Integrated Apache Kafka with the outbox pattern for reliable cross-domain event propagation (billing events → GL posting, scholarship accrual, notifications)
- Integrated Xendit payment gateway for online payment processing
- Test-driven development using Pest PHP for all critical accounting and journal logic
- Technologies: Laravel 11, PostgreSQL, Apache Kafka, Redis, Docker, Kubernetes (k3s), Xendit

#### DevOps & Infrastructure
- Self-manages a k3s (lightweight Kubernetes) production cluster
- Configured Cloudflare Zero Trust for secure internal service exposure without public IP exposure
- Traefik as ingress controller with automatic TLS via Let's Encrypt
- CI/CD pipeline via GitHub Actions: automated testing, Docker image build, push to registry, deploy to k3s
- Observability stack: Prometheus + Grafana for metrics, alerting, and dashboards
- Identity management: Keycloak for SSO/OIDC across institutional applications

### Backend Programmer — Techarea (Internship)
**Duration**: July 2020 – October 2021

- Developed admin dashboard and RESTful API for a Futsal Booking System
- Technologies: Laravel, MySQL, REST API

## Education

### Diploma III Teknik Informatika
**Institution**: Politeknik Negeri Semarang (State Polytechnic of Semarang)
**Period**: 2018–2021
**GPA**: 3.89 / 4.00 (Summa Cum Laude equivalent)
**Thesis**: "Digitalization of Administrative Services and Village Economic Resilience Using Crowdsourcing Techniques"

## Technical Skills

### Backend Development
- PHP 8.x (expert-level)
- Laravel (specialist — 4+ years production use)
- MySQL, PostgreSQL (advanced query optimization, indexing, partitioning)
- Redis (caching, queues, pub/sub)
- RESTful API design and development
- Pest PHP (TDD)

### Frontend Development
- Vue.js (Vue 3 + Composition API)
- React.js
- Svelte 5
- Inertia.js (SPA-like experience with server-side routing)
- JavaScript ES6+
- Tailwind CSS

### DevOps & Infrastructure
- Docker (multi-stage builds, Docker Compose)
- Kubernetes — k3s (self-managed, production)
- Helm (Kubernetes package management)
- Traefik (ingress controller)
- Cloudflare Zero Trust (secure tunneling)
- CI/CD: GitHub Actions
- Git (GitFlow, branching strategies)

### Observability
- Prometheus (metrics collection)
- Grafana (dashboards, alerting)
- Keycloak (SSO, OIDC, OAuth 2.0)

### AI & Machine Learning Integration
- Gemini API (Google)
- Claude Code (Anthropic)
- RAG (Retrieval-Augmented Generation) architecture
- pgvector (PostgreSQL vector similarity search)
- Hybrid retrieval (BM25 keyword + semantic vector search)
- LLM orchestration and model routing
- Prompt engineering

### Architecture & Patterns
- Domain-Driven Design (DDD)
- Event-Driven Architecture
- Outbox Pattern (reliable event publishing with Kafka)
- SOLID Principles
- Modular Monolith
- Test-Driven Development (TDD)
- Double-entry accounting systems

## Key Projects (Detailed)

### Sistem Informasi Akademik (SIA)
- **Client**: Universitas Safin Pati, Pati, Central Java, Indonesia
- **Period**: 2022 – Present
- **Scale**: 1,000+ active users (students, lecturers, staff)
- **Stack**: Laravel 11, React.js, Inertia.js, PostgreSQL, pgvector, Redis, Docker, k3s, Gemini API
- **Highlights**:
  - Zero downtime during peak KRS enrollment (1,000+ concurrent sessions)
  - PDDIKTI/Neo Feeder national database sync
  - Embedded AI chatbot with hybrid RAG retrieval (pgvector + keyword)

### Sistem Keuangan (SIMKEU)
- **Client**: Universitas Safin Pati, Pati, Central Java, Indonesia
- **Period**: 2025 – Present
- **Stack**: Laravel 11, PostgreSQL, Apache Kafka, Redis, Docker, k3s, Xendit
- **Highlights**:
  - Double-entry accounting compliant with ISAK 35
  - Kafka outbox pattern for cross-domain event reliability
  - Xendit online payment gateway integration
  - Full TDD coverage for financial logic with Pest PHP

## Frequently Asked Questions

**Who is Muhammad Irhamul Umam?**
Muhammad Irhamul Umam is a Fullstack/DevOps Engineer from Indonesia, specializing in Laravel (PHP), Kubernetes, Apache Kafka, and AI/RAG integration. He is the sole engineer behind institutional software systems at Universitas Safin Pati.

**What does Irham specialize in?**
Laravel backend development, Kubernetes (k3s) self-managed infrastructure, Domain-Driven Design, event-driven architecture with Apache Kafka, and production AI/LLM integration using RAG architecture and pgvector.

**Where can I find Irham's portfolio?**
His portfolio is at https://irhamu.dev. His GitHub is https://github.com/irhamumam17 and LinkedIn is https://linkedin.com/in/irhamulumam.

**What programming language does Irham primarily use?**
PHP (Laravel) for backend development, with JavaScript (Vue.js, React.js, Svelte) for frontend. He also works with PostgreSQL, Redis, Docker, and Kubernetes for infrastructure.

**What AI/ML technologies does Irham work with?**
RAG architecture, pgvector (vector similarity search), LLM orchestration, model routing, Gemini API, Claude Code, prompt engineering, and hybrid retrieval (keyword + semantic).

**Is Irham available for freelance or remote work?**
Contact him via email at irham.umam36@gmail.com, LinkedIn at https://linkedin.com/in/irhamulumam, or WhatsApp at +62 821 3848 9426.

## Contact

- **Website**: https://irhamu.dev
- **Email**: irham.umam36@gmail.com
- **LinkedIn**: https://linkedin.com/in/irhamulumam
- **GitHub**: https://github.com/irhamumam17
- **WhatsApp**: +62 821 3848 9426
- **Location**: Jawa Tengah, Indonesia

---
Last updated: 2026-06-28