Principal Software Engineer; Onsite

Job Overview

Principal Software Engineer – Onsite, Huntsville, AL

Collaborate with cross‑functional, agile teams to define, design, and implement new features, ensuring system integration and scalability. Troubleshoot, debug, and optimize existing code for performance and efficiency in complex environments. Write and maintain comprehensive documentation for software applications, including system architecture and design specifications. Participate in product reviews and ensure adherence to engineering standards and best practices. Stay current with industry trends, particularly in modern languages, Artificial Intelligence (AI), Dev Sec Ops , and other methodologies and technologies related to complex systems.

• Agile methodology and associated tools
• Leadership tools related to Proposal efforts and Earned Value (EV)
• Modern Dev Sec Ops  and Continuous Integration/Continuous Delivery techniques
• Test‑Driven Multi‑Disciplined Capability (TDMC) Product Development methodology
• Domains such as battle management, command & control, communications, radar, missile, and/or modeling & simulation
• Engineering across disciplines to develop solutions for defense systems
• Use of AI to increase efficiency and quality across the SDLC

• Minimum Bachelor’s degree in Science, Technology, Engineering, or Mathematics (STEM)
• At least 8 years of experience in software development
• Experience leading a small team (e.g., estimating effort, decomposing tasks, tracking and reporting progress)
• Experience developing complex systems and applications using an object‑oriented programming language, particularly C++
• Experience with Unix/Linux operating systems
• Experience with data structures, software design principles, and coding algorithms, especially in high‑concurrency and distributed systems
• Experience with embedded systems, real‑time systems, or large‑scale applications
• Experience with multithreading, memory management, and performance optimization in complex environments
• Experience with shell scripting (tcsh, csh, bash) and software development tools such as Git, Clearcase, and debuggers
• Experience with agile and other software development methodologies
• Ability to obtain and maintain a U.S. Government‑issued interim Secret security clearance (required)

• Preferred:
  Active Secret security clearance
• Preferred:
  Experience as a Scrum Master or Product Owner
• Preferred:
  Experience with network communication protocols and embedded real‑time operating systems such as VxWorks and Integrity
• Preferred:
  Experience with OO languages such as Java, C#, and Ada
• Preferred:
  Competency with Red Hat Enterprise Linux

DOD Secret clearance is required. Candidates must obtain an interim U.S. Government‑issued security clearance prior to the start date and must be U.S. citizens.

• Medical, dental, vision, life insurance, short‑term disability, long‑term disability
• 401(k) match, flexible spending accounts
• Flexible work schedules, employee assistance program, parental leave, paid time off, holidays
• Employee Scholar Program
• Potential annual short‑term and/or long‑term incentive compensation programs (dependent on role and collective‑bargaining agreements)
• Salary range: $107,500
  
  USD – $204,500
  
  USD (depending on experience and qualifications)

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, 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.