SBA Software Development Engineer - Telco, Network, Java, Kubernetes, Linux - On-site, Stevenage, UK

A large global organisation is in search of an SBA Software Development Engineer to assist on a major 5G Core Network testing and validation program, managing the design, development, and deployment of cloud-native network functions using the VIAVI RANtoCore platform.
This will be a full-time on site position based in Stevenage, UK., + Design and implement SBA-based 5G Core components aligned with 3GPP standards
+ Build and manage REST APIs for network function communication
+ Deploy cloud-native services using Docker/Kubernetes in public and private cloud environments
+ Ensure performance, reliability, and scalability of network services
+ Write and maintain tests (unit, integration, system-level) for robust service delivery
+ Collaborate with DevOps teams to ensure continuous integration and deployment
+ Maintain documentation and ensure compliance with 3GPP and industry standards
+ Engage directly with customers when needed (up to 25% travel)

+ Extensive experience in telecom software development (preferably in 4G/5G Core domains)
+ Strong programming skills in Go, Java, or C++
+ Hands-on experience with 5G SBA network functions (e.g., AMF, SMF, NRF, PCF, UDM)
+ Proficient in developing REST/gRPC APIs and working with microservices
+ Deep understanding of 3GPP specs (TS 23.501, 23.502, 29.500+ series)
+ Experience with Docker, Kubernetes, Helm, and cloud platforms (AWS, Azure, OpenShift)
+ Knowledge of network protocols (SCTP, HTTP/2, Diameter, PFCP)
+ Familiarity with CI/CD pipelines and tools (e.g., Jenkins, GitLab, Robot Framework)
+ Strong Linux skills (Ubuntu/Debian) and scripting (Shell, Python)