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Added 6 mins ago
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Added 44 mins ago
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Principal Software Engineer - Mobile Applications
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RTX

Principal Software Engineer (Cybersecurity | Networking)

United States

The salary range for this role is 118,300 USD - 224,900 USD.

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Job details

Pay: The salary range for this role is 118,300 USD - 224,900 USD.
Posting language: English
Posted: Oct 30, 2026

Original job description

Date Posted:

2026-10-30

Country:

United States of America

Location:

US-MD-ANNAPOLIS JUNCTION-339 ~ 306 Sentinel Dr ~ 339 BLDG

Position Role Type:

Onsite

U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance

Security Clearance Type:

TS/SCI - Current

Security Clearance Status:

Active and existing security clearance required on day 1

Raytheon Company Managed by Collins Aerospace

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.

Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense.

Applied Signal Technology (AST) is seeking a Principal Software Engineer with a strong background in cybersecurity and networking who strives for excellence and have a passion to be part of a team that strengthens our nation and improves the security of our world. AST provides trusted strategic and tactical SIGINT solutions that secure the interests of the U.S. and its partners. AST’s work in areas such as high-capacity broadband communications, signal processing and analysis, tactical SIGINT, and wireless communications continually challenges our extraordinary engineers to resolve problems and make the world a safer place. AST’s work environment is dynamic, highly collaborative and provides engineers the freedom to strengthen and expand their skills, explore new and creative ideas, and work closely with our nation’s finest service members all while embracing integrity, innovation and work-life balance.

This is an ONSITE position located at our Annapolis Junction, MD location. To find out more about AST please, click the link below: Applied Signal Technology: WHO WE ARE

What You Will Do:

You will work with other experienced members in R&D on system development and deployments for the protection of our country
Participate in the requirements, design, development and testing of software to include development of new work products or enhancement of existing applications and systems
Design, code, test, integrate, and document software solutions
Participate in internal review of software components and systems
Generate briefings and present material to team members, customers, and AST management as necessary
Collaborate with project managers and other professionals within Engineering
Follow established development practices and processes to maintain the configuration management of software products
Travel up to 25% (domestic)

Qualifications You Must Have:

Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 8 years of prior relevant experience
Typically requires a minimum of 8 years of experience developing in C, C++, Python, and/or Rust
Experience with system-level integration and testing, specifically, the integration of advanced, custom processing systems, testbeds, and software
Experience developing, coding, testing, and debugging complex algorithms
Experience working with customers, end users, hardware design teams, and software design teams
Experience with developing software for APIs, networking, and backend
Experience with creating proof-of-concept (PoC) use case scenarios and prototypes from initial ideas
Strong written and verbal communication skills and the ability to work independently yet collaboratively in a team environment
Experience in implementing cybersecurity tools and/or controls
Experience developing system level designs, high level control and data interfaces
Active and transferrable U.S. government issued Top Secret SCI (TS/SCI) security clearance is required prior to start.
U.S citizenship is required, as only U.S. citizens are eligible for a security clearance

Qualifications We Prefer:

Experience developing in C/C++ within a Linux environment
Experience with cybersecurity concepts such as red/blue teaming, defense-in-depth, and/or network penetration
Experience with building networks and networking protocols
Experience with reverse engineering software and/or hardware
Experience with Design, Development, Integration and Test of complex Communication systems
Experience in developing proof-of-concept (PoC) use case scenarios for novel cybersecurity systems
Experience formalizing, developing and documenting requirements, plans, and procedures based on customer discussions, briefings, interactions, and statements of work
Existing Top Secret with Full Scope Poly (Active within the last 24 months)

What We Offer

Medical, dental, and vision insurance
Three weeks of vacation for newly hired employees
Generous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option
Tuition reimbursement program
Student Loan Repayment Program
Life insurance and disability coverage
Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection
Birth, adoption, parental leave benefits
Ovia Health, fertility, and family planning
Adoption Assistance
Autism Benefit
Employee Assistance Plan, including up to 10 free counseling sessions
Healthy You Incentives, wellness rewards program
Doctor on Demand, virtual doctor visits
Bright Horizons, child and elder care services
Teladoc Medical Experts, second opinion program
Eligible for relocation
And More!

Learn More & Apply Now! Do you want to be a part of something bigger? A team whose impact stretches across the world, and even beyond? At Collins Aerospace, our Mission Systems team helps civilian, military and government customers complete their most complex missions - whatever and wherever they may be. Our customers depend on us for intelligent and secure communications, missionized systems for specialized aircraft and spacecraft and collaborative space solutions. By joining our team, you’ll have your own critical part to play in ensuring our customer succeeds today while anticipating their needs for tomorrow. Are you up for the challenge? Join our mission today.

*Please ensure the role type (defined below) is appropriate for your needs before applying to this role.

Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products.

#AST

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.

The salary range for this role is 118,300 USD - 224,900 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. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement.

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.

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.

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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