Principal Software Engineer (Onsite)

Date Posted: 2026-08-19 | Location: Fulton, MD (8170 Maple Lawn Blvd, Maple Lawn, Ste 190, 200 & 300) | Role Type: Onsite

U.S. citizenship is required, as only U.S. citizens are eligible for a U.S. government-issued DoD Secret security clearance. An active and existing security clearance is required after day one.

About the Role

Solipsys, a wholly owned subsidiary of Collins Aerospace/RTX, is seeking a Principal Software Engineer to drive the design, architecture, and development of new software systems and products. This role operates in a dynamic, complex, and fast-paced environment with both commercial and government customers, including domestic and international programs. You will work directly on command and control software systems, utilizing technologies such as Java, C++, Angular, GraphQL, REST, Kafka, and TypeScript.

Responsibilities

• Drive the design, architecture, and development of critical capabilities in an active Agile environment.
• Demonstrate leadership by coordinating the activities of multiple engineers to ensure successful technical execution and delivery of solutions.
• Proactively identify and address issues early, leading and motivating teams to make decisive corrections and avoid larger problems.
• Communicate effectively (verbally and in writing) with all levels within and outside the company, tailoring presentations and summaries to the intended audience.
• Collaborate in a team environment to design, architect, and innovate software solutions.

Requirements

• Relevant work experience in software development using object-oriented programming languages such as Java or C++.
• Experience with full life-cycle development, including software requirements, design, development, debug, and test.
• Strong computer science fundamentals: data structures, algorithms, distributed systems, and information retrieval.
• Typically requires a degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 8 years of prior relevant experience, or an Advanced Degree in a related field with a minimum of 5 years of experience.
• U.S. citizenship is required for security clearance eligibility.

Preferred Qualifications

• Direct hands-on experience with GraphQL, REST, Kafka, RabbitMQ, Redis, PostgreSQL, Docker, Kubernetes, Angular, TypeScript, and HTML/CSS.
• Experience driving the design and architecture of software applications and systems.
• Skills with C++ technologies such as Boost, STL, and the Standard C++ Library.
• Experience developing, assessing, and validating complex mathematical solutions (e.g., track filters, track correlation algorithms, weapon engagement algorithms) for sensors and/or command and control (C2) programs.
• Experience developing software in a Linux environment.
• Experience with container orchestration tools such as Docker, Kubernetes, and OpenShift.
• Experience managing cybersecurity processes, including vulnerability assessments.
• Experience developing system models, simulations, and complex algorithmic solutions, including the use of tools like MATLAB.

Benefits

• Medical, dental, and vision insurance.
• Three weeks of vacation for newly hired employees.
• Generous 401(k) plan with employer matching funds and a Lifetime Income Strategy option.
• Tuition reimbursement program.
• Student Loan Repayment Program.
• Life insurance and disability coverage.
• Optional coverages: pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, and ID theft protection.
• Birth, adoption, and parental leave benefits.
• Ovia Health: fertility and family planning.
• Adoption Assistance and Autism Benefit.
• Employee Assistance Plan, including up to 10 free counseling sessions.
• Wellness rewards program (Healthy You Incentives).
• Virtual doctor visits (Doctor on Demand).
• Child and elder care services (Bright Horizons).
• Second opinion program (Teladoc Medical Experts).
• Eligible for relocation assistance.

Pay

The salary range for this role is $118,300 – $224,900 USD. The range is a good-faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including role, function, responsibilities, work experience, location, education/training, and key skills.