As an experienced full-stack developer, I've honed my skills in creating dynamic and responsive websites for a variety of purposes. WooCommerce? Check. Shopify? Check. WordPress? Absolutely! These experiences have helped me develop a versatile skill set that perfectly aligns with your project's needs. As for your specific requirements, I have a strong background in web development languages like CSS, HTML, JavaScript, and PHP - skills that will be essential for this venture into crafting an accessible web-based instant messenger.
In addition to my general expertise in web development, I also possess particular knowledge dealing with real-time communication tools and intricate server integrations - further value-adds for your project. Lastly, given today's digital threats, data security has become paramount. Over the course of my career, I've made a concerted effort to familiarize myself not only with robust security measures but more critically end-to-end encryption practices to ensure the highest levels of user privacy and data protection.