Principal Engineer - Mvno Network & Cloud Core (Telecom | …, Xico

Description At Walmart, we are transforming connectivity in Mexico through our digital ecosystem. We are looking for a Principal Engineer to lead the architecture and evolution of our MVNO platform, ensuring a robust, scalable operation ready for the future of telecommunications (5G and cloud-native). This role will be responsible for strengthening internal mobile core capabilities, reducing dependency on external vendors, and driving strategic technical decisions with direct business impact. Key Responsibilities Design and optimize the mobile core architecture, including signaling flows (Diameter, GTP, SIP, SS7) Ensure the proper operation of charging and policy systems (OCS / PCRF / PCF) to secure revenue and network control Lead the transition toward cloud-native architectures (Kubernetes, containers, CNFs) Define technical integration standards with network partners (MNO, IPX/GRX, vendors) Ensure network readiness for 5G Standalone (SA) Identify technical risks, optimize processes, and ensure operational continuity Act as a technical reference point for internal teams and key stakeholders Requirements 7+ years of experience in telecommunications Experience working in MVNO environments Strong background in mobile core (EPC / 5G Core) Advanced knowledge of protocols: Diameter, GTP, SIP, SS7 Experience in Charging / Revenue Assurance Experience with cloud architectures (AWS, Kubernetes, Docker) Proven experience in architecture, principal engineering, or technical leadership roles Advanced English (professional working proficiency) Preferred Qualifications Experience with VoLTE / VoNR implementations Knowledge of 3GPP standards Key Competencies Strategic mindset with strong results orientation Ability to influence technical and business decisions Strong communication skills across technical and non-technical audiences Focus on continuous improvement and scalability What We Offer Opportunity to be part of a high-impact telecom initiative Exposure to cutting-edge technologies (5G, cloud-native) Collaborative environment with a strong focus on innovation Professional growth within a integral organization What we offer: At Walmart, we foster a culture of collaboration, innovation, and continuous development, empowering leaders to create meaningful impact at scale. En Walmart de México y Centroamérica estamos comprometidos con una cultura de pertenencia, por lo que buscamos incorporar el mejor talento basándonos en competencias, habilidades y potencial; no discriminamos por ningún motivo, incluyendo género, edad, origen étnico, apariencia física, estado civil, condiciones de salud por VIH o cualquier enfermedad, situación socioeconómica, discapacidad, orientación sexual, identidad o expresión de género por ello durante el proceso de atracción y selección no solicitaremos información personal, fotografías o análisis clínicos de ningún tipo. Los datos personales del candidato o candidata no son relevantes durante el proceso de entrevista ni para la selección final. En Walmart de México y Centroamérica nos comprometemos con nuestros/as asociados/as para que encuentren día a día en el trabajo un ambiente de respeto, libre de discriminación y acoso sexual. En Walmart estamos trabajando por contar con mayor accesibilidad, en caso de que necesites algún ajuste razonable por favor compártelo con el equipo de Reclutamiento. Postúlate en Kit Empleo: kitempleo.com.mx/empleo/5vbnc9