What are the responsibilities and job description for the Applications Engineer – 5G NR / O-RAN Technologies position at eridan?
About Eridan
At Eridan we believe in the power of collaboration and communication to achieve our mission: connect the planet to empower a sustainable, shared future. That mission is possible with our patented transmitter which decreases the cost and power required to roll out 5G by 10x when deployed globally. This is all facilitated through our offices: our Sunnyvale headquarters has big windows (even in the lab!), is walking distance to downtown and the Caltrain, and fits the entire team in the cafeteria for our frequent company parties. Learn more about our mission here.
About this Job
Eridan is seeking a highly skilled Applications Engineer to support our partners in the integration, productization, and deployment of end-to-end 5G solutions built around our innovative Radio Unit (RU). This position plays a critical role in enabling seamless integration with CU/DU platforms and successful deployment in both lab and field environments. The ideal candidate will bring a deep understanding of 5G NR (SA/NSA), O-RAN/vRAN architectures, and 3GPP standards, along with strong technical hands-on experience in virtualized, containerized, and Linux-based environments.
As our Applications Engineer, you will:
Partner Integration & Customer Support
- Support integration of Eridan’s RU with third-party CU/DU platforms and full 5G Core, ensuring interoperability, deployment readiness, and post-deployment support.
- Collaborate with partners and customers on end-to-end system validation, providing expertise and hands-on troubleshooting across RAN and Core interfaces
- Analyze 5G VoNR call flows and troubleshoot signaling/data issues using PCAPs and gNB/Core trace logs.
RAN Architecture & RF Performance
- Work with O-RAN/vRAN architectures, including functional splits (e.g., 7-2x), and components such as RU, DU, CU, CP, and UP.
- Optimize RF operations over eCPRI, including CSR parameter configuration, DU setup, and synchronization/timing mechanisms.
Protocol Stack & Networking
- Apply deep knowledge of the 3GPP 5G protocol stack (L1/L2/L3) for control and user plane functionality.
- Leverage a strong understanding of IP networking, including routing, switching, VLANs, interface configuration, and network debugging.
System Validation & Debugging
- Conduct system integration and validation of 5G RAN layers (RRC, SDAP, PDCP, RLC, MAC, PHY) per 3GPP specifications.
- Work in Linux-based CU/DU environments, managing services, logs, and network configurations using CLI tools (e.g., systemd, journalctl, tcpdump).
- Contribute to debug and feature development efforts using C, C , and scripting languages (e.g., Python, Bash).
Virtualization & Test Tools
- Operate in virtualized and containerized environments (e.g., VMware, KVM, Docker, Kubernetes), supporting orchestration and automation across telco cloud stacks.
- Utilize RF and network test tools/emulators such as Keysight, Rohde & Schwarz, Anritsu, and Anite for validation and performance testing.
Qualities of a Successful Candidate
- Bachelor’s degree in Electrical Engineering, Computer Engineering, Telecommunications, or a related field; Master’s degree preferred.
- 5 years of hands-on experience in 5G NR system engineering, integration, or application engineering roles, preferably within O-RAN/vRAN ecosystems.
- Strong experience in end-to-end 5G integration, including 5G Core connectivity and troubleshooting.
- Proficiency in Linux, IP networking, and system-level diagnostics in distributed telecom environments.
- Practical experience with virtualized and containerized architectures, and familiarity with orchestration tools (e.g., Kubernetes, OpenStack).
- Strong development/debugging skills in C, C , and scripting (Python).
- Hands-on experience using and configuring radio and network testing tools.
- Excellent analytical, documentation, and communication skills; able to interface with cross-functional teams and partners.
Perks of working at Eridan
- Work on new technology that will make a significant impact on global infrastructure
- Ability to learn, develop, and advance within a flexible environment
- Collaborate with smart, passionate, and helpful co-workers
- Celebrate progress company-wide
- Pre-IPO equity
- 401K with automatic match
- Health, Vision and Dental insurance
Salary Range
Given our anticipated growth, we are open to hiring individuals with varying levels of experience to fill this role. Salary will be commensurate with job-related skills, experience and other relevant factors. The base salary range for the primary location of this role is between $125,000 and $155,000 plus stock options and benefits.
Eridan is an equal opportunity employer. We value and celebrate diversity and are committed to creating an inclusive environment for all employees. Qualified applicants will be considered for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status.
