Senior Software Development Engineer; Onsite

Senior Software Development Engineer – Onsite, Tewksbury, MA

We are seeking an experienced Senior Software Development Engineer to design, develop, and maintain complex systems in C/C++, Java, and Python. The role focuses on integrating emerging AI‑enabled technologies and delivering high‑performance applications throughout the entire software development lifecycle.

• Design, develop, and maintain software applications using C/C++, Java, and Python for complex systems.
• Collaborate with cross‑functional teams to define, design, and implement new features, ensuring system integration, scalability, and AI‑assisted development pipelines.
• Troubleshoot, debug, and optimize existing code for performance and efficiency in complex environments.
• Write and maintain comprehensive documentation, including system architecture and design specifications.
• Develop automation pipelines to streamline integration of upstream releases and automate configuration management.
• Participate in code reviews and enforce coding standards and best practices.
• Stay current with industry trends and advancements in C/C++, Java, Python, and AI‑related fields relevant to complex systems and continuous delivery.

• Degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of five years of relevant experience.
• Proficiency in C/C++, Java, or other object‑oriented languages.
• Experience developing complex or embedded systems, real‑time systems, or large‑scale applications.
• Strong knowledge of Unix/Linux operating systems.
• Ability to obtain and maintain a U.S. government‑issued security clearance; U.S. citizenship required.

• Active Secret security clearance.
• Deep understanding of data structures, algorithms, high‑concurrency, and distributed systems; experience with AI/ML frameworks is a plus.
• Expertise in multithreading, memory management, and performance optimization.
• Experience with network communication protocols, shell scripting (tcsh, csh, bash), and tools like Git and Clear Case.
• Familiarity with embedded RTOSs (e.g., VxWorks, Integrity) and debuggers.
• Strong problem‑solving, communication, and teamwork skills.
• Leadership experience on small projects or initiatives.
• Proven experience developing automation pipelines using tools such as Jenkins and Git; AI‑assisted automation valued.
• Experience with scripting languages such as Python, Perl, or Bash.
• Knowledge of Agile, Scrum, or other development methodologies.
• Ability to provide technical guidance or mentorship to junior engineers.

• Onsite role located in Tewksbury, Massachusetts.
• Salary range: $86,800 – $165,200 per year.
• Benefits include health, dental, vision, life insurance, 401(k) match, flexible spending accounts, PTO, holidays, and more.

RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or veteran status, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified individuals with a disability and protected veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act.