Sr Software Engineer, Modeling and Simulation Onsite

RTX; Sterling (VA); On-site; USD 96,000 - 182,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401(k) match

Paid time off

Job summary

RTX’s MAST directorate seeks a Senior Software Engineer to build Python-based simulation and modeling applications, collaborating with cross-functional teams across time zones in an Agile environment.

You’ll design features, review code for quality, and optimize performance while participating in the full software lifecycle with an onsite role in multiple locations including Dulles/ Sterling, VA.

Qualifications

• Bachelor’s degree in STEM.
• 5+ years in software development (STEM).
• Experience with Python programming and scripting.
• Experience with Python libraries and software packages (NumPy, Pandas, SimPy, Panel, Bokeh, Plotly Dash).
• Experience with version control tools (Bitbucket, GitHub, GitLab, Azure DevOps).
• Ability to obtain and maintain a U.S. TS/SCI with Polygraph clearance; U.S. citizenship required.

Responsibilities

• Design, develop, and implement features for Python-based applications focused on modeling and simulation.
• Collaborate with cross-functional teams across time zones to deliver solutions.
• Conduct code reviews to ensure coding standards and best practices.

Skills

Python programming

Python scripting

Agile/Scrum

Code reviews

Distributed teams

Education

Bachelor’s degree in STEM

Tools

NumPy

Pandas

SimPy

Panel

Bokeh

Plotly Dash

PyQt

Graphviz

Bitbucket

GitHub

GitLab

Azure DevOps

Job description

At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world‑class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world. Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

Raytheon’s Mission Applied Science & Technology (MAST) directorate is seeking a Senior Software Engineer to join our Factory and Data Solutions team. This role focuses on developing a Python‑based application for simulation, modeling, and analysis of factory production models. Additional projects may include software development for mission management, command and control systems, AI/ML applications, or Live Virtual Constructive simulation environments. You will play a key role in enabling data‑driven decision‑making and collaborating with a multi‑disciplinary team in an Agile development environment. This is an onsite role located in Dulles / Sterling, VA, Richardson, TX, McKinney, TX, or Aurora, CO.

What You Will Do

• Design, develop, and implement new features for Python‑based applications focused on modeling and simulation.
• Collaborate with cross‑functional teams across multiple time zones to deliver innovative solutions.
• Conduct code reviews to ensure adherence to coding standards and best practices.
• Optimize and maintain the existing codebase for performance and efficiency.
• Support the software development lifecycle, including requirements gathering, design, implementation, unit testing, and system testing.
• Participate in Agile development process, providing regular updates on progress and status.
• Document software artifacts, including design documents, test procedures, and developer notes.

Qualifications

• Typically requires a Bachelor’s degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 5 years of experience unless prohibited by local laws/regulations.
• Experience with Python programming and scripting.
• Experience with one or more Python libraries and software packages for backend and frontend development, such as NumPy, Pandas, SimPy, Panel, Bokeh, Pydot, PyQt, Plotly Dash, HoloViz, or Graphviz.
• Experience with code hosting and version control tools, such as Bitbucket, GitHub, GitLab, or Azure DevOps.
• Experience in the software development lifecycle, including requirements, design, implementation, unit testing, and system testing.
• The ability to obtain and maintain a U.S. government‑issued TS/SCI with Polygraph security clearance is required.
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• Experience with automated testing frameworks, such as PyTest.
• Experience with statistics, statistical modeling (e.g., logistic regression, Bayesian models), and/or data distribution fitting (e.g., normal, lognormal, Weibull).
• Familiarity with simulation modeling and analysis, including Discrete Event Simulation.
• Experience working with distributed teams across multiple time zones.
• Experience with Agile/Scrum software development methodologies.

What We Offer

Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Safety, Trust, Respect, Accountability, Collaboration, and Innovation.

Location Info and/or Links: DMV: https://careers.rtx.com/global/en/raytheon-dmv-location North Texas: https://careers.rtx.com/global/en/raytheon-north-texas-location Aurora, CO: https://careers.rtx.com/global/en/raytheon-aurora-co-location #LI-RH2

Location: US-VA-DULLES-710 ~ 22110 Pacific Blvd ~ BLDG 10

This role is a U.S.-based role.

If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply.

The salary range for this role is 95,500 USD - 181,700 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills.

• Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, long-term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, Employee Scholar Program, parental leave, paid time off, and holidays.

Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance.

RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window.

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.

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RTX is an aerospace and defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry‑leading businesses – Collins Aerospace, Pratt & Whitney, and Raytheon. Its 195,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, Virginia.