Collins Aerospace, a division of RTX, is seeking a Senior Software Engineer to join their Strategic Solutions team in Richardson, TX. This role focuses on developing mission-critical software for NC3 defense systems supporting Mission Systems. The position requires expertise in Java development and offers the opportunity to work with high-performance teams in an adaptive environment. The role involves creating complex software designs, participating in requirements analysis, and mentoring junior engineers. The position requires U.S. citizenship and the ability to obtain a security clearance, as it supports critical defense projects. The company offers comprehensive benefits including healthcare, retirement plans, and educational support. This is an onsite position that provides the chance to work on sophisticated aerospace and defense technologies while contributing to national security initiatives. The role offers competitive compensation ranging from $82,000 to $164,000 USD, depending on experience and qualifications.