5G Core Network Engineer, APIs

MetTel

full-time

Posted on: 9/18/2025

Origin: • 🇺🇸 United States

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💰 $125,000 per year

Mid-LevelSenior

CloudDockerFirewallsGoJavaKubernetesPython

About the role

Design and develop RESTful APIs for VNFs, ensuring they are well-documented, secure, and performant
eBPF will be used for deep network insights and optimizations
Collaborate with network engineers, VNF vendors, and security professionals to understand Enterprise subscriber’s unique requirements
Deliver 5G core network requirements, and translate them into clear and concise API specifications using Swagger or OpenAPI
Implement robust API authentication, authorization, and policy enforcement
Integrate VNF APIs with our existing network management platform, billing, support and other systems using appropriate protocols (e.g., JSON, YAML)
Develop unit and integration tests for VNF APIs, including utilizing EBPF probes for deeper observability and performance testing
Maintain and update VNF APIs as VNF features evolve, new versions are deployed, and as 5G core network requirements change
Document API design, usage, and troubleshooting information for developers, operations teams, and security personnel, clearly outlining integration points
Stay up-to-date on emerging trends and technologies in VNF APIs, network function virtualization (NFV), eBPF applications in networking, and advancements in 5G core networks

Minimum 3+ years of experience in API development (RESTful APIs required)
Strong understanding of API design principles, including HTTP methods, resource representations, data formats, and security considerations
Proficiency in a modern programming language commonly used for VNF API development (e.g., Python, C, Java, Go)
Solid understanding of 5G core network architecture and protocols
In-depth knowledge of eBPF concepts, including attaching probes, reading kernel data structures, and developing custom eBPF programs
Excellent analytical and problem-solving skills
Strong communication, collaboration, and interpersonal skills
Ability to work independently and as part of a team
(Desirable) Experience with network concepts like firewalls, routing, load balancing, and network security principles
(Desirable) Experience with container orchestration, Kubernetes, Helm
(Desirable) Experience with cloud-native network architectures and containerization technologies (Docker, Kubernetes)
(Desirable) Experience with API security testing tools
(Desirable) Familiarity with network function monitoring tools and frameworks
(Desirable) Proven experience using eBPF for network visibility and performance optimization in production environments
(Desirable) Understanding of SIM applet Java Card development
(Desirable) Experience with network performance monitoring and optimization tools
(Desirable) Experience with network security principles and best practices