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I’m Iván Rodríguez Calleja, a Senior Frontend Engineer with over 9 years of experience building digital products in fast-paced startup and growth environments. I specialize in frontend architecture, scalable design systems, and user experiences focused on conversion and retention, always with an emphasis on simplicity, accessibility, and real business impact. I have led the development of key features such as conversion flows, interactive interfaces, rich text editors, and AI-powered tools, collaborating closely with product and design teams to align user experience with growth objectives. I also have hands-on experience with A/B testing, referral systems, and funnel optimization, applying a data-driven approach to every decision. I have contributed to open source initiatives and shared knowledge through a technical blog, aiming to give back to the community and help others grow. I strongly believe in the power of open collaboration and transparency. What drives me is a strong sense of ownership and quality, focusing on the details that make an experience reliable and seamless, always considering edge cases and aiming for solutions that foster long-term trust with users.