What Technology Does Odoo Use?

1. Programming Languages

Python: Odoo's core server and application logic are written in Python. Known for its readability, clean syntax, and rich standard library, Python allows developers to model sophisticated enterprise logic—from multi-currency accounting to automated inventory routes—with high efficiency and maintainability.

JavaScript (OWL Framework): Client-side functionality is powered by JavaScript using Odoo's modern in-house framework, OWL (Odoo Web Library). Introduced to replace older dependencies like jQuery and Underscore.js, OWL is a lightweight, component-based, reactive framework built with TypeScript and modern JavaScript standards, providing lightning-fast reactivity and seamless state management.

XML (Extensible Markup Language): XML is used extensively across Odoo to define the entire presentation layer and initial data files. Every view (forms, lists, kanbans, pivots, graphs), window action, menu item, and security access rule is declared in structured XML, cleanly separating presentation from underlying Python models.

2. Odoo Web Framework (MVC Architecture)

Odoo features its own robust, full-stack application framework built on top of Python. Following the Model-View-Controller (MVC) architectural pattern:

• Model: Python classes inherit from models.Model to define relational business entities, calculated fields, and business constraints.
• View: XML architecture files render responsive visual interfaces for users across web and mobile.
• Controller: Python classes inherit from http.Controller to manage web routing, portal pages, and API endpoints.

This modular architecture dramatically accelerates the creation of modules, enabling developers to extend standard apps without modifying core source code.

3. Database Management: PostgreSQL

Odoo relies exclusively on PostgreSQL, one of the most powerful and reliable open-source relational database management systems available. PostgreSQL provides enterprise-grade ACID compliance, advanced indexing, complex joins, and native JSONB data types. Odoo's built-in Object-Relational Mapping (ORM) translates high-level Python commands into optimized SQL queries, ensuring data consistency and high performance even with large transaction volumes.

4. Web Server & Routing: Werkzeug

Odoo uses Werkzeug, a comprehensive Python web utility library that handles incoming HTTP requests, session cookie management, and URL routing. In production deployments, Werkzeug operates behind high-performance reverse proxies like Nginx or Traefik to deliver SSL termination, static asset caching, and load balancing. When connecting your ERP to external platforms, our certified team provides end-to-end Odoo integration services.

5. User Interface (UI) Libraries: QWeb and Bootstrap

QWeb Templating: QWeb is Odoo's primary XML templating engine used for rendering dynamic HTML. It powers website frontend pages, customer portals, backend kanban views, and document templates.

Bootstrap: Odoo incorporates the Bootstrap frontend framework to ensure all backend applications, portals, and e-commerce pages are fully responsive across smartphones, tablets, and desktop workstations.

6. Document & Report Generation: QWeb and wkhtmltopdf

In modern Odoo, all PDF documents—including customer invoices, delivery slips, sales quotes, and purchase orders—are created using QWeb HTML/CSS templates and converted into vector PDF files using wkhtmltopdf (an open-source command-line tool powered by WebKit). This HTML-based reporting architecture replaced the legacy ReportLab library used in older OpenERP versions, giving developers complete flexibility to customize document designs using standard CSS styling.

7. Background Processing & Real-Time Bus

Odoo executes background and automated operations through native Scheduled Actions (ir.cron). These cron jobs run recurring tasks such as automated recurring billing, email queue delivery, reordering rules, and data synchronizations. For real-time browser notifications, live chat messages, and background task alerts, Odoo uses its native bus.bus service powered by WebSockets and long-polling.

8. Authentication and Security

Odoo incorporates industry-standard security mechanisms at every level. For user authentication, it supports OAuth 2.0, OpenID Connect, LDAP, and Single Sign-On (SSO) with providers like Google Workspace and Microsoft 365. Internally, access is protected through Access Control Lists (ACLs) defining model permissions, Record Rules providing row-level security domains, and field-level security groups.

9. Integration APIs: XML-RPC, JSON-RPC, and REST API

Odoo provides powerful external web service APIs. In versions 14 through 17, external systems communicate via XML-RPC and JSON-RPC endpoints (/xmlrpc/2/object and /jsonrpc), allowing applications written in Python, PHP, C#, Java, or Node.js to securely execute CRUD operations and model methods. Starting in Odoo 18, Odoo introduces native RESTful JSON API endpoints, simplifying modern webhooks, third-party microservices, and mobile application integrations.

10. Deployment and Hosting Options

Docker Containers: Docker is frequently utilized to containerize Odoo and PostgreSQL environments, ensuring consistent dependencies across local development, staging, and production.

Cloud & PaaS Hosting: Organizations can deploy on public cloud platforms like AWS, Google Cloud, and Microsoft Azure, or use Odoo.sh, Odoo's managed cloud Platform-as-a-Service featuring automated staging branches, testing suites, and daily backups.

On-Premises: Businesses with strict compliance or data residency mandates can run Odoo on local Linux servers, providing total control over infrastructure and database administration.