← All Positions
Posted Apr 3, 2026

[Remote] Sr. Software Engineer – 5G RAN

Apply Now
Note: The job is a remote job and is open to candidates in USA. Fairwinds Technologies is a U.S.-based engineering firm specializing in Satellite Communications and RF Transmission Systems. They are seeking a Sr. Software Engineer with hands-on 5G RAN and radio software development experience to adapt the 5G OpenAirInterface stack for military applications. Responsibilities • Support SW architecture design for an end-to-end 5G communications system based on Open AirInterface (OAI) open-source SW stack • Deliver software requirements, documents and integration and test plans • Act as software engineer and implement the software needed changes into the 5G SW stack • Adapt and extend the 5G OpenAirInterface stack to optimize military LPI/LPD requirements, specifically through the implementation of DSSS and Frequency Hopping techniques • Support integration and testing of communication systems in lab and field settings • Interface with hardware and system teams to drive system-level performance • Author technical documentation and support generation of system specifications and SBIR deliverables Skills • Bachelor's degree in Computer Science, Computer Engineering, or related field • 5+ years of design experience in 5G RAN/Radio software development with deep knowledge of 5G and/or ORAN systems and 5G waveforms • 10+ years of experience coding and reverse engineering with C/C++ • 7+ years of debugging real time communication SW • Experience in writing 5G systems and SW specifications • U.S. Citizenship and eligible for DoD security clearance • Must be eligible to work in the US • Must hold active secret clearance • Master's degree in Communications, Computer Science / Engineering, or Wireless Systems • Experience with 5G core deployment using containerized or virtualized environments (Docker, Kubernetes) • Experience in utilizing AI in code writing and reviews • Hands-on experience with the 5G OpenAirInterface (OAI) stack, including gNB, and UE integration • Experience in L1 and L2 integration of 5G RAN or SATCOM communications systems • Familiarity with adapting 5G/OAI for military applications, including LPI/LPD techniques • Experience of User Equipment 5G software • Practical knowledge of DSSS and Frequency Hopping as applied to secure, resilient wireless communications • Experience with Terrestrial and Non-Terrestrial (NTN) communications systems • Understanding of 3GPP specifications (Rel-15 to Rel-18) Company Overview • Fairwinds Technologies is a defense and space manufacturing company that offers engineering, field service, and interactive training. It was founded in 2016, and is headquartered in Annapolis, Maryland, USA, with a workforce of 51-200 employees. Its website is https://www.fairwinds-tech.com/.