Ruman contributed a Bengali-language web development resource to the EbookFoundation/free-programming-books repository, authoring an HTML and CSS tutorial series with over 30 chapters and 20 practical projects. He focused on expanding accessible content for Bengali-speaking learners, integrating practical examples to enhance real-world applicability. Ruman applied Markdown formatting and documentation skills to improve readability and ensure lint compliance across the repository, addressing both content breadth and technical quality. His work demonstrated fluency in HTML, CSS, and Markdown, and leveraged Git-based collaboration to deliver a resource that supports open-source educational goals while maintaining high standards for code and documentation consistency.