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Network Software Engineer

2 months ago

Falls Church, Virginia, United States GTT, LLC Full time
About the Role

GTT, LLC is seeking a highly skilled Network Software Engineer to contribute to the design, development, and testing of end-to-end network applications across multiple 3GPP technologies and nodes.

Key Responsibilities
  • Design and implement network protocols for space-based cellular networks
  • Design and implement network software for signaling and O&M operations
  • Design and implementation of software testing systems
Technical Requirements
  • Experience developing software for 2G and/or LTE networks
  • Protocol stack implementation, testing, and quality assurance experience
  • Strong knowledge of one wireless networking technology (GSM, GPRS, LTE, and/or 5G standards, access and core network protocols, and end-to-end network applications)
  • Strong knowledge of core network function blocks, CM, MM, Authentication, HRL, and VLR
  • Understanding of messaging applications and call processing across the telecom network nodes
  • Prior hands-on experience implementing core network protocol stacks or network applications, ability to code across the full stack, strong Linux administration, including scripting
  • Open-source tools development, implementation, and/or collaboration experience and source code control systems (Git/GitLab)
  • Experience with C/C++, Python, and debugging tools
Preferred Qualifications
  • Strong modern C++ coding and advanced design patterns
  • Strong debugging skills (gdb, valgrind, etc.)
  • Socket and multithreaded programming
  • Distributed architecture
  • Experience with end-to-end system integration and deployment of wireless network systems, including GSM, 4G/LTE, or 5G
  • Experience with mobility management and handover procedures
  • Radio resource management
Technical Skills
  • GSM
  • SS7, SIGTRAN
  • GSM, VLR, HLR, MSC, SMSC, Billing, CAMEL, GPRS
  • 4G/LTE
  • UMTS, RNC, Node-B
  • LTE Uu interface, eNodeB, MME, HSS, Diameter, PDN-GW
  • SIP
  • 5G
  • VoLTE, Beamforming, SMS over IMS, MIMO
  • Network Security
  • Network planning
  • SMS over GSM and LTE
  • IPv4 and IPv6
  • Network Function Virtualization (NFV)
  • Amazon Cloud Architecture
  • Machine Type Communication and IoT
  • Roaming: 3G, LTE, and 5G
  • Network provisioning and management
Soft Skills
  • Ability to work in teams
  • Strong collaboration
  • Positive attitude