{"id":652364,"url":"https://alion.io/job/hermeus-seniorprincipal-mission-software-engineer","title":"Senior/Principal Mission Software Engineer","company":{"id":455980,"name":"Hermeus","domain":"hermeus.com","url":"https://alion.io/company/hermeus","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"A","score":91,"open_postings":62,"ghost_share":0,"stale_share":0.161,"repost_share":0,"time_to_fill_p50_days":113,"computed_at":"2026-10-24T06:02:35Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Atlanta, United States","Los Angeles, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":128250,"max":156750,"currency":"USD","period":"year","gross":null,"usd_annual":156750},"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"ActiveMQ","optional":true},{"name":"Apache Kafka","optional":true},{"name":"C","optional":true},{"name":"DO-178C","optional":true},{"name":"Linux","optional":true},{"name":"STANAG","optional":true},{"name":"ZeroMQ","optional":true}],"status":"live","first_seen_at":"2025-12-18T15:56:21Z","employer_posted_date":"2026-10-09","last_verified_at":"2026-10-24T14:23:59Z","board_verified":true,"closed_at":null,"days_open":310,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":309},"description":"About The Role:\nThe Mission Systems Engineering team develops the Mission Management System-the software platform connecting mission subsystems, autonomy services, operator interfaces, communications links, and telemetry across Hermeus aircraft and ground systems.\nAs a Senior/Principal Mission Software Engineer, you will architect, build, integrate, and validate critical portions of this platform. You will work across software, avionics, communications, autonomy, simulation, and flight operations to solve complex problems in distributed, hardware-connected environments.\nThis is a hands-on technical leadership role with the opportunity to define foundational architecture and directly influence how Hermeus aircraft are commanded, monitored, tested, and expanded with new mission capabilities.\nResponsibilities:\nOwn major Mission Management System capabilities from architecture through integration, testing, and operational use\n\nDesign and develop high-performance C++ software for command and control, telemetry, mission workflows, and subsystem coordination\n\nDefine scalable architectures, interfaces, APIs, protocols, and message schemas\n\nIntegrate autonomy services, sensors, payloads, radios, tactical datalinks, and third-party systems\n\nMake technical decisions involving performance, reliability, latency, fault tolerance, and extensibility\n\nDiagnose complex issues across distributed software, networks, embedded hardware, avionics, and communications systems\n\nPartner with systems, avionics, autonomy, networking, flight-test, and operations teams\n\nBuild and improve simulation, software-in-the-loop, hardware-in-the-loop, and system-integration environments\n\nLead design reviews, code reviews, technical trade studies, and integration activities\n\nIdentify technical risks and drive solutions in environments where requirements are still evolving\n\nMentor engineers and establish strong software architecture and development practices\n\nSupport ground and flight-test campaigns, including real-time troubleshooting\n\nRequirements:\nBachelor’s degree in Computer Science, Computer Engineering, Electrical Engineering, Software Engineering, or a related field\n\n7+ years of professional software-development experience for Senior-level consideration\n\n10+ years of relevant experience, or an equivalent record of technical leadership and impact, for Principal-level consideration\n\nAdvanced proficiency with modern C++, including C++17 or newer\n\nExperience designing and delivering complex, production-quality software systems\n\nStrong knowledge of concurrency, memory management, software architecture, and performance-oriented development\n\nExperience with distributed, real-time, embedded, robotic, aerospace, or other hardware-connected systems\n\nExperience with TCP, UDP, multicast, and socket-level network programming\n\nAbility to define architectures, interfaces, protocols, and system boundaries in ambiguous environments\n\nExperience integrating software with hardware, external services, or independently developed subsystems\n\nStrong debugging skills across software, networking, and hardware interfaces\n\nAbility to clearly communicate technical decisions, risks, and tradeoffs across multidisciplinary teams\n\nDemonstrated ownership through design, implementation, integration, testing, and deployment\n\nPreferred Skills and Experience:\nExperience with mission systems, command-and-control software, mission planning, ground-control systems, autonomy platforms, or operator-facing applications\n\nAerospace, defense, robotics, autonomous vehicle, or spacecraft experience\n\nExperience with RF communications, SATCOM, line-of-sight radios, or tactical datalinks\n\nFamiliarity with publish/subscribe architectures or middleware such as DDS, ZeroMQ, ActiveMQ, or Kafka\n\nExperience integrating third-party sensors, payloads, autonomy services, radios, or mission subsystems\n\nKnowledge of avionics architectures, aircraft networks, telemetry, and command-and-control workflows\n\nLinux software development and deployment experience\n\nExperience developing fault-tolerant or degraded-mode behaviors for distributed systems\n\nExperience with simulation, SIL, HIL, system-integration labs, ground tests, or flight tests\n\nFamiliarity with standards such as DO-178C, ARINC, FACE, OMS/UCI, STANAG, or MIL-STD\n\nExperience 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