About the Role
The Core Network Infra Support Engineer ensures the stability, performance, and reliability of cloud-native 4G/5G core networks. You will collaborate with operations and design teams to troubleshoot complex issues, manage lifecycles, and optimize network solutions.
Key Responsibilities
- Operations: Support cloud-native and virtualized network functions (CNFs/VNFs) across environments.
- Troubleshooting: Resolve incidents via end-to-end analysis of cloud, network, and application layers.
- Analysis: Perform Root Cause Analysis (RCA) and document technical knowledge bases.
- Change Management: Execute upgrades, patches, and expansions following quality standards.
- Automation: Use Kubernetes and CI/CD tools to deploy and optimize network workloads.
- Collaboration: Work with R&D and design teams to validate fixes and solutions.
- Observability: Improve monitoring (dashboards, logs, metrics) for early fault detection.
- Support: Participate in on-call rotations for high-priority incidents.
- Documentation: Maintain SOPs, runbooks, and configuration baselines.
- Vendor Management: Coordinate with hardware vendors for troubleshooting and replacements.
Required Qualifications
- Education: Bachelor's degree in CS, IT, Telecom, or related field.
- Linux/Networking: Hands-on experience in Linux admin, IP routing, firewalls, and DNS.
- Kubernetes: Proficiency in K8s orchestration (pods, services, config, logs).
- Monitoring: Experience with distributed systems using Prometheus, Grafana, or ELK stacks.
- Scripting: Ability to write Python or Bash scripts.
- Problem Solving: Structured approach to incident handling and RCA.
- Communication: Strong written and spoken English for global collaboration.
Preferred Qualifications
- Mobile Core: Understanding of 4G/5G concepts (AMF, SMF, UPF, MME, SGW, etc.).
- Cloud Platforms: Experience with VMware, OpenStack, or Public Cloud.
- Protocols: Knowledge of SIP, Diameter, HTTP/2, SCTP, and Wireshark.
- Operations: Experience in 24/7 support environments.
- Certifications: CKA, CCNA/CCNP, or Cloud Provider certifications.
Personal Attributes
- Mindset: Customer-oriented with strong ownership and accountability.
- Teamwork: Effective collaborator in cross-functional, global teams.
- Growth: Continuous learner open to new technologies.
- Resilience: Ability to prioritize and perform under pressure during major incidents.
Top Skills
What We Do
Ericsson builds the digital connectivity the world relies on. Our technology underpins the mobile networks, platforms, and systems that billions of people, businesses, and societies depend on every day.
We are a global leader in communications technology, delivering mobile network infrastructure, cloud software, and wireless connectivity solutions for service providers and enterprises worldwide. Our networks support connectivity across 180+ countries, helping power everyday communication as well as critical digital services at global scale.
Connectivity has evolved far beyond consumer mobile use. Today, nearly 80% of the world’s population accesses the internet via mobile networks, and Ericsson is helping shape what comes next. We are advancing 5G and 5G Advanced, developing network APIs that open connectivity to the global developer ecosystem, and applying automation and AI to make networks more intelligent, efficient, and resilient.
Ericsson was the first company to launch live 5G networks on five continents, and our 5G platform is now commercially live in 150+ networks across 60+ countries. We also support more than 36,000 enterprise customers, enabling secure, high-performance connectivity for industries such as manufacturing, aviation, logistics, utilities, and public safety, where reliability and performance are mission critical.
Innovation is central to how we work. Ericsson has approximately 28,000 employees in research and development, backed by one of the strongest intellectual property portfolios in the industry with 60,000+ granted patents. Our engineers, researchers, and technologists work across 100+ global R&D sites, helping define how networks evolve and how digital infrastructure is built for the long term.
As the world moves toward a mobile-first, AI-powered, and cloud-driven future, connectivity becomes the foundation for digital transformation across every industry. Ericsson is building that foundation, shaping the future of digital connectivity through technology that operates at global scale and supports real-world impact, today and for what comes next.
Why Work With Us
Ericsson is a place for people who want to work on technology that powers everyday life. You’ll contribute to large-scale systems used every day, tackle complex challenges in live environments, and keep developing your skills and career in your own vision.
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Employees engage in a combination of remote and on-site work.
Ericsson adopts a hybrid work model globally because we know balance matters. Sometimes things are better in real life. Other times we can be more productive at home. Our hybrid approach gives you the best of both worlds.
