Software Development Engineer in Test (SDET)

Software Development Engineer In Test (SDET)Zetier seeks software development engineers in test (SDET) to design, build, and maintain scalable automated testing capabilities for embedded hardware, cyber platforms, and operational software systems. This role focuses on developing robust test infrastructure, improving product reliability, and enabling continuous validation across hardware and software solutions. Candidates will develop automated validation frameworks, integrate testing into CI/CD pipelines, and support verification activities spanning low-level firmware, networking systems, and mission-driven software capabilities. Work includes functional, integration, regression, and hardware-in-the-loop testing aligned with quality, operational effectiveness, and compliance objectives.Required:5+ years experience in software development or test engineeringStrong programming experience in Python, C/C++, and/or RustExperience deploying automated test frameworks (e.g. pytest, Robot)Experience testing embedded or Linux-based systems platformsHands-on experience integrating testing into CI/CD pipelinesFamiliar debugging complex HW/SW system interactionsComfortable writing clear technical documentation (e.g. test reports)Strong communication skills across engineering and customer teamsActive U.S. security clearanceDesired:Experience with hardware-in-the-loop (HIL) and device automationExperience testing embedded systems, networking devices, or mobileExperience with containerization (e.g. Docker, Kubernetes, QEMU)Familiar with network/protocol validation (e.g. Wireshark, Scapy)Experience with RF or wireless systems (e.g. 802.11ac, Zigbee, SDR)Experience testing firmware, drivers, and low-level code/servicesExposure to cybersecurity, vulnerability research, or pentest teamsExperience with observability, telemetry, or reliability engineeringPositions available in Arlington, VA.Zetier is proud to be an equal opportunity employer. We celebrate diversity and do not discriminate on the basis of race, religion, color, sex, gender identity, sexual orientation, age, non-disqualifying physical or mental disability, national origin, veteran status or any other basis protected by law. All employment is decided on the basis of merit, qualifications, and business need.