Join Us

Join Reailize – where innovation meets impact. We’re on a mission to help global enterprises work smarter, faster, and more efficiently at the cutting edge of AI, data, and cloud. By combining deep expertise, advanced engineering, and patented software, we transform complexity into opportunity. Here, curiosity, collaboration, and bold ideas aren’t just welcomed – they’re celebrated.

What makes us different?

We are a private & global group of companies with 20+ years of proven track record, supporting leading organizations in Telecom, Security, and Real Estate across North America, Europe, the Middle East, and Latin America.

About the role 

We are onboarding a new 5G Standalone (SA) Core from lab into production to serve our IoT, consumer, and connected-car traffic. This role owns the engineering work that gets it there: design input, test plan execution, integration with surrounding OSS/BSS and provisioning systems, and the automation that makes all of the above repeatable. 

You will be hands-on. You will write Python. You will validate that provisioning and data services work end-to-end before customer traffic touches the new core. 

This is a senior individual-contributor role. You will not manage people, but you will be expected to set technical direction, mentor, and represent the team in cross-functional design reviews. 

Please note that this is a remote opportunity for applicants based in the US.

What you’ll do 

• Contribute to design reviews for the 5G SA Core lab-to-production transition, with a focus on data-plane and provisioning correctness. 
• Build and execute integration test plans against core network functions (AMF, SMF, UPF, UDM/UDR, AUSF, NRF, PCF, NSSF) and the surrounding ecosystem (HSS migration paths, OSS/BSS, DNS, charging, policy). 
• Validate IoT and consumer provisioning flows end-to-end: SIM/eSIM/eUICC onboarding, subscriber activation, profile changes, network attach, PDU session establishment, data session continuity. 
• Build automation — primarily in Python — for repeatable testing, configuration, and post-deployment validation. Reduce manual toil in the lab→prod handoff. 
• Partner with vendor engineers, internal NetOps, security, and product teams to triage and resolve integration defects. 
• Troubleshoot from the device through the RAN to the core: PCAPs, NF logs, signaling traces (NGAP, N1/N2, N4, HTTP/2 SBI), KPIs. 
• Document runbooks, test artifacts, and automation so the work is auditable and the team can run without you. 

Required qualifications 

• 7+ years of network engineering experience, with at least 2 years in 4G/5G mobile core (EPC and/or 5GC). 
• Working knowledge of 5G SA architecture and the major control- and user-plane NFs; comfortable reading 3GPP-style call flows. 
• Hands-on experience integrating or testing mobile core deployments — not just operating them — including lab-to-production transitions. 
• Production-grade Python: you write code others maintain, not just scripts. Familiarity with REST/gRPC, async I/O, and at least one test framework (pytest or equivalent). 
• Experience with IoT cellular networks (NB-IoT, LTE-M, or 5G IoT slices) and the provisioning side of IoT (eSIM/eUICC, IoT connectivity platforms, subscriber lifecycle). 
• Solid troubleshooting fundamentals: packet captures, signaling analysis, log correlation across NFs. 

Preferred qualifications 

• Experience supporting AT&T’s US IoT network — its services, provisioning stack, and customer-facing platforms. 
• Familiarity with AT&T internal automation and test tooling. 
• Experience with connected-car / automotive cellular workloads (eUICC remote provisioning, persistent connectivity, mobility patterns). 
• Consumer wireless network experience (subscriber scale, mass provisioning, MVNO interfaces). 
• Automation tooling beyond Python: Ansible, Terraform, CI/CD pipelines for network functions, NETCONF/YANG, Robot Framework or similar for network test automation. 
• Experience with cloud-native NF deployments (Kubernetes, Helm, service mesh). 
• Test tooling experience: traffic generators, signaling simulators, network emulation. 

Interview Integrity:

During the interview process, we're evaluating your individual problem-solving skills, creativity, and approach to challenges. While AI tools like ChatGPT, Claude, and Cursor are part of your daily toolkit once you join B-Yond, all interviews, assessments, and take-home assignments must be completed independently. 

You may not use AI tools, third-party services, coaching platforms, or content-farming services during any part of the interview process unless we explicitly permit it. We will clearly communicate when AI tools are allowed for specific assessments.

Any indication of third-party assistance or AI-generated responses will result in immediate disqualification.