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Efren Diaz is an accomplished engineering manager with extensive experience in software development and project leadership across various companies since 2000. Currently, at Babbel, Efren has transitioned from senior software engineer to engineering manager since January 2019, focusing on team management and software development. Prior experience includes senior backend engineering at ZenMate, where Efren played a significant role in the migration to microservices and feature development. At CrystalCommerce, significant work involved maintaining a legacy Rails application and migrating infrastructure to OpenStack. Early career highlights feature tech lead responsibilities at adaptiv.io for high-profile online gaming projects and foundational contributions to startups like Sonian and DeepData. Efren holds a Bachelor of Science in Computer Science from Universidad Nueva Esparta and has contributed to diverse industries through analyses, designs, and application development.