As a **Senior Systems Engineer** at Mercado Libre, you will design and scale innovative, secure systems that solve real-world, high-impact problems. You will work in a dynamic environment leveraging cutting-edge technology, applying sound engineering practices, proprietary AI models, and continuous learning—all to democratize e-commerce and financial services across Latin America. Imagine leading challenging, dynamic, and innovative projects—**and being responsible for:** * Designing and implementing scalable, secure network solutions to support the growth of our platform. * Automating repetitive operational tasks—including monitoring, backups, and updates—to enhance operational efficiency. * Optimizing our WLAN networks using data analysis to ensure the best possible user experience. * Collaborating with security teams on the integration and management of Palo Alto and Fortinet firewalls. * Providing Level 2 network support—resolving complex incidents and ensuring operational continuity. * Leading technology projects in areas such as Networking or Infrastructure within high-demand environments, including planning, execution, and successful closure. **What are we looking for in you?** * Experience in designing, implementing, and optimizing high-performance WLAN networks. * Mastery of advanced switching architectures: VLANs, STP/RSTP, StackWise/VSS. * Strong knowledge of perimeter security, administration of Palo Alto and Fortinet firewalls, and remote access VPN solutions. * Experience providing Level 2 network support and resolving critical incidents. **Are you ready to leave your mark on Latin America’s technology landscape?** Apply now and join our mission! Hybrid work model. Site: Buenos Aires, Argentina