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AST SpaceMobile is building the first and only global cellular broadband network in space to operate directly with standard, unmodified mobile devices based on our extensive IP and patent portfolio and designed for both commercial and government applications. Our engineers and space scientists are on a mission to eliminate the connectivity gaps faced by today’s five billion mobile subscribers and finally bring broadband to the billions who remain unconnected. Position Overview The System \ SW Test team at AST SpaceMobile is responsible for verifying and validating the embedded software that runs aboard all spacecraft in the AST fleet. We are seeking a junior Test Software Engineer with AOCS (Attitude & Orbit Control System) domain knowledge to join our India-based System \ SW Testing team and contribute to the verification and validation of flight software that implements attitude and orbit control functions. In this role, you will develop and maintain automated FSW (Flight Software) test frameworks and your controls domain background will allow you to write meaningful tests, interpret results in physical terms, and work effectively with both the FSW and AOCS engineering teams. Key Responsibilities Design, develop, and maintain automated test scripts and frameworks in Python and MATLAB Implement and execute unit, integration, and software-in-the-loop (SIL) tests for AOCS algorithms including attitude control laws, momentum management, and thruster firing logic Review and debug C++ flight software modules to identify and trace defects revealed by test execution or on-orbit telemetry analysis related to attitude sensors Maintain and improve test infrastructure, including simulation environments, truth models, and automated reporting pipelines. Document test results, anomaly reports, and lessons learned in Jira and internal knowledge-management systems. Serve as a bridge between the FSW and AOCS teams, translating AOCS domain requirements into testable software acceptance criteria and communicating test findings in terms meaningful to both teams. Coordinate with US-based FSW and AOCS Flight Engineering counterparts to align on test coverage, software interface requirements, and operational procedures. Monitor operator compliance with AOCS test processes and support continuous improvement of ground verification methodologies. Education: Bachelor’s or Master’s degree in Aerospace Engineering, Robotics, Mechanical Engineering, Electrical Engineering, Computer Science, or a closely related field. Coursework in orbital mechanics, control systems, or spacecraft dynamics is strongly preferred. Required Qualifications: 1–3 years of relevant experience in control systems, estimation theory, flight dynamics, orbital mechanics, or simulation-driven validation. Some hands-on experience with Python, including scripting and data analysis Familiarity with MATLAB and/or Simulink sufficient to run simulations and analyze numerical results. Exposure to C++; ability to read and follow flight software code with guidance. Foundational understanding of control systems theory (e.g. closed-loop dynamics, PID controllers, or state-space concepts). Introductory knowledge of orbital mechanics (e.g. Keplerian orbits, reference frames, coordinate transformations) Awareness of attitude representations such as Euler angles, rotation matrices, or quaternions, at a conceptual level. Analytical mindset with attention to detail and a willingness to learn in a fast-moving engineering environment. Communicates clearly in written and spoken English; comfortable asking questions and collaborating with remote teams. Preferred Qualifications: Experience writing automated test frameworks or continuous integration pipelines for embedded or real-time software. Familiarity with spacecraft sensors and actuators for attitude determination and control systems including star trackers, IM