Senior NTN Protocol Software Engineer

Chantilly, United States | Posted on 06/11/2025

Job Title:

Senior Networking Software Engineer.

Location:

Falls Church, VA.

Duration:
Full-Time.

As a Senior Networking Software Engineer, you will play a vital role in the software development team, contributing to the design, development, integration, and testing of end-to-end network applications across multiple 3

GPP technologies and nodes. You will be responsible for writing and implementing software that supports interconnectivity to establish advanced 3

GPP Non-Terrestrial Networks (NTN), such as space-based cellular infrastructure.

If you thrive in a dynamic environment, enjoy taking on diverse technical challenges, and have a creative approach to solving unconventional problems, we’d love to hear from you.

• Designing and implementing network protocols for space-based or terrestrial cellular networks.
• Developing software for network signaling and operations & maintenance (O&M).
• Creating and maintaining software testing systems.

• Bachelor’s degree or higher in Computer Science or a related field.
• Experience developing software for 2G, LTE, or other wireless networks.
• Experience in protocol stack implementation, testing, and quality assurance.
• Strong knowledge of at least one wireless networking technology, such as GSM, GPRS, LTE, and/or 5G, including access and core network protocols and end-to-end applications.
• Solid understanding of core network functional blocks such as CM, MM, Authentication, HLR, and VLR.
• Knowledge of messaging applications and telecom call processing across network nodes.
• Hands‑on experience in core network protocol stack implementation or network application development.
• Proficiency in full-stack development and strong Linux administration and scripting skills.
• Experience working with open-source tools and version control systems like Git/Git Lab.
• Proficiency in C, C++, Python, and debugging tools.

• Strong modern C++ coding skills and advanced software design patterns.
• Proficient in debugging tools such as gdb, valgrind, etc.
• Experience with socket programming and multithreading.
• Background in distributed architectures.
• Hands‑on experience with system integration and deployment of GSM, LTE, or 5G networks.
• Familiarity with mobility management and handover procedures.
• Experience in radio resource management.

• 4G/LTE: UMTS, RNC, Node-B, LTE Uu interface, eNodeB, MME, HSS, Diameter, PDN-GW, SIP
• Networking: IPv4/IPv6, Network Security, NFV, Network planning
• Cloud & IoT:
  Amazon Cloud Architecture, Machine-Type Communication, IoT
• Roaming: 3G, LTE, and 5G roaming protocols and network provisioning