omid rajabalian

Driving backend development for large-scale hotel booking and PMS systems, focusing on performance optimization, scalability, and secure payment processing. Implemented PCI Proxy, a secure credit card tokenization system that replaces sensitive PAN data with tokens, reducing PCI scope, ensuring compliance, and enabling secure refunds and settlements without storing data. Developed robust APIs to integrate with 50+ OTA and PMS systems, eliminated bottlenecks, achieving 30%+ performance improvement

Dreamlines as a market leader for Booking Cruise • Modify and create new features automatic offers, discount services, managing booking, and orders based on scrum methodology for more than 46 cruise lines. • Improvement of 50% of server space with NoSQL logging system. Technologies: MVC .Net, Entity Framework, Angular, jQuery, HTML, CSS, AWS DevOps, Jenkins, Octopus, Git, Jira

Marketplace e-commerce using multi-vendor and multi-store functionality (B2B and B2C). • Implementing easily connected to 3 database engines - SQL Server, MySQL, and PostgreSQL. • Fully extensible, stable, decreasing 30% develop time, and highly scalable with a plugin architecture. • Achieve excellent performance with caching system and async methods and fetch the most important data in under 2 seconds. Technologies: MVC .Net Core, Telerik, Bootstrap, jQuery, HTML, CSS, NUnit, Web API

Refah Bank is one of the great banks in Iran with over 1,000 branches and more than 25 million customers. • Maintenance of a system for more than 100 big organizations to see their financial reports and analyze their transactions. • Improved performance significantly by reducing the queries to the core by 40% (Saved up to 5.5 million queries/day) Technologies: .NET, Windows Service, SQL Server, MVC .Net, Web API, Entity Framework, Telerik, Windows Service, Fast report

• Monitoring project: Sending a lot of important logs in under 1 second to the operator by SignalR. A windows application sends log data to the client web page using self-host SignalR. • ERP Project: develop new features for inventory and accounting systems for 400 clients. Technologies: C#, Asp.Net Web Form, JavaScript, HTML, CSS, Entity Framework, Telerik, SQL server, SignalR, Active Report