Available for freelance work

Abdelrehman
Elhaj

Systems & Cloud Engineer · ERP Specialist

10+ years building enterprise systems — Odoo ERP for Saudi markets, cloud infrastructure on AWS & OCI, Java microservices, and mobile apps. Based in Riyadh, working with global clients.

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10+
Years experience
4
Service domains
2
Live SaaS products
What I do

Services

End-to-end delivery across ERP, cloud, backend, and mobile — with deep expertise in Saudi market requirements.

Odoo ERP Development

Custom modules, ZATCA-compliant invoicing, Ejar integration, Arabic RTL interfaces, and Saudi-market deployments on Odoo 17 Community.

Odoo 17 ZATCA Ejar QWeb Python
Cloud & DevOps

Infrastructure design and automation on AWS and Oracle Cloud — Kubernetes clusters, Docker, CI/CD pipelines, and cloud-native architectures.

AWS OCI Kubernetes Docker Terraform
Java Spring Boot

Production-grade microservices and REST APIs using Spring Boot — with Oracle-certified Java expertise and enterprise integration patterns.

Spring Boot Microservices REST API Java PostgreSQL
Mobile Development

Android apps published to Google Play — from concept to store submission. Proven with Bullet Control, a live arcade game with active users.

Android Google Play Java Game Dev
Selected work

Portfolio

Live products and modules built for real clients and the Saudi market.

Propza property management screenshot
SaaS · Live
Propza — Property Management

Full SaaS platform for Saudi property management with Ejar integration, ZATCA-compliant invoicing, and tenant lifecycle management built on Odoo 17.

Odoo 17 Ejar API ZATCA Python
Live demo
Construction Management System screenshot
SaaS · Live
Construction Management System

Saudi-market construction ERP with project tracking, subcontractor management, contract workflows, and regulatory compliance fields built for Vision 2030 projects.

Odoo 17 Saudi regs Arabic RTL Python
Live demo
School Management System screenshot
Odoo Module
School Management System

Complete school ERP module with multi-role access, student lifecycle, QWeb reports, and full Arabic RTL documentation. Available as a commercial product.

Odoo 17 QWeb Arabic RTL Multi-role
Live demo
Game
Android · Google Play
Bullet Control

Arcade mobile game published on Google Play. Built end-to-end in Java for Android — from game loop and physics to store publishing and updates.

Android Java Google Play Game Loop
Google Play
Background

About me

I'm a Systems & Cloud Engineer with 10+ years of experience building enterprise software for the Saudi market and global clients. Currently leading Technical Support engineering at Proptech in Riyadh.

My work sits at the intersection of ERP customization, cloud-native infrastructure, and product engineering. I build things that go into production — from ZATCA-compliant invoicing modules to Kubernetes-deployed microservices.

I specialize in Odoo 17 for Saudi-specific requirements — Ejar integration, Arabic RTL, Vision 2030 compliance — and cloud infrastructure across AWS and Oracle Cloud (OCI).

Open to remote freelance engagements worldwide.

Current role Systems & Cloud Engineer · Team Lead, Technical Support at Proptech (proptech.sa), Riyadh
Saudi market expertise Deep knowledge of ZATCA, Ejar, MOJ integrations and local regulatory requirements
Prior roles Salasa Logistics · Al-Othaim Holding — 10+ years across logistics, retail, and real estate verticals
Languages Arabic (native) · English (professional) — all deliverables available in both
Credentials

Certifications

Earned and in-progress credentials across cloud, DevOps, and development.

AWS
AWS Solutions Architect Associate
✓ Certified
OCP
Oracle Certified Java Programmer
✓ Certified
CKA
Certified Kubernetes Administrator
In progress
AWS
AWS Solutions Architect Professional
In progress
TF
HashiCorp Terraform Associate
In progress
AI
AWS GenAI Developer
In progress
Get in touch

Let's work together

Available for freelance projects in Odoo ERP development, cloud infrastructure, backend engineering, and mobile development. Saudi-market experience, global delivery.

Hire me on Upwork GitHub hdrelhaj.com