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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 We are looking for a Software Engineer to join our Telco Software Development team, responsible for designing and building innovative telecom software solutions and components. This is a hands‑on engineering role for individuals motivated by creating genuinely novel software in a fast‑moving, greenfield environment. You will be part of a small, high‑ownership team where your code is deployed into real network infrastructure, and where the technical decisions you help make directly shape the long‑term differentiation of the platform. Candidates may come from a strong software engineering background (systems and backend, ideally with telecom exposure) or from related engineering disciplines with solid software development skills. Key Responsibilities: Design, build, and deploy telecom software components across the platform Translate architectural designs, interface control documents (ICDs), and functional and nonfunctional requirements into clean, well-tested, production ready code Develop modular, maintainable software in accordance with established coding standards, with clear documentation and meaningful code comments Implement and maintain integration tests, regression test suites, and performance benchmarks for developed components Troubleshoot and resolve issues across the software stack, including protocol behavior, interface mismatches, performance bottlenecks, and deployment failures Participate in architecture, design, and code reviews, providing and incorporating constructive technical feedback Support system level integration and acceptance testing to ensure delivered software meets defined quality and performance criteria Contribute to the team’s agile delivery process, including sprint planning, backlog refinement, and reliable delivery against milestones Use, maintain, and continuously improve CI/CD pipelines, automated test frameworks, and containerized development environments Maintain technical documentation such as component designs, API contracts, test results, and operational runbooks Collaborate with cross functional teams to clarify requirements, validate assumptions, and ensure solutions meet operational and business needs   Qualifications   Education: Bachelor’s or Master’s degree in Computer Science, Telecommunications Engineering, or a related field — or equivalent professional experience. Experience: A minimum of 3+ years of professional software development experience – exposure to telecom or network related development projects is a plus. Strong proficiency in either C/C++ or Go – experience or interest to master Rust is a plus Proficiency in Bash/Python for scripting, tooling, and test automation Solid command of data structures, algorithms, concurrency, memory management, and system design for high-performance or low-latency applications Good understanding of networking concepts — TCP/IP stack, socket programming, protocol design, and inter-process communication patterns relevant to network software Proficient with Git - comfortable working in a team environment with code review, branching strategies, and CI/CD workflows Comfortable developing and debugging in Linux/Unix environments Experience writing unit tests, integration tests, and contributing to test automation frameworks English proficiency at B2 level or above; able to collaborate effectively with peers and architects in a globally distributed team Soft