Sr. Principal Software Engineer – Signal Processing

Date Posted:

2026-06-15



Country:

United States of America

Location:

US-CA-SAN JOSE-826 ~ 200 Holger Way ~ BLDG 826, Ast

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

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 Senior Principal Software Engineer with specialization in digital signal processing (DSP) techniques who strives for excellence and has 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 challenge our extraordinary engineers to resolve problems and make the world a safer place.  AST’s work environment is passionate, highly collaborative and provides engineers with 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 at the San Jose, CA location.

To learn more about AST, please click the link below.

Applied Signal Technology: WHO WE ARE

What You Will Do:

• Apply your DSP expertise to solve & develop solutions to complex signal processing problems.  The key responsibilities for this position include:

  • Lead and/or participate in next-generation IR&D projects to drive invention, design, and optimization of advance DSP algorithms.

  • Analyze and optimize signal processing algorithms for improved performance.

  • Resolve system level integration issues, lab anomalies, or other real-world effects on system performance/operation.

  • Drive/implement technical solutions and mentor DSP development engineers

  • Communicate technical directions/roadmaps clearly with project managers and engineering leadership

• Travel up to 25% to other AST locations and customers sites within the U.S.

Qualifications You Must Have:

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 10 years of relevant prior experience

• Advanced signal processing analysis and development experience in one or more of the following areas:

  • Advanced signals and protocols (modern digital communications, wideband, advanced modulations, low power, spread spectrum, frequency hopping)

  • Waveform algorithm modeling/development, sensitivity/performance assessments, timing/carrier recovery and tracking, modulation/demodulation processing

  • Digital beamforming, signal detection, direction of arrival measurements and emitter location techniques

  • Signal survey, snapshot, detection, identification, direction finding, and geolocation.

• Demonstrated expertise utilizing modern C++, MATLAB, Python, or equivalent environments to architect, implement, and validate complex signal processing solutions.

• Active and transferable U.S. government issued Top Secret SCI (TS/SCI) security clearance required prior to start date.

• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance

Qualifications We Prefer:

• Experience applying Machine Learning models for signal classification, modulation recognition, or cognitive radio applications.

• Experience applying DSP techniques to Spread Spectrum and/or Ultra-Wideband signals.

• Experience working in the Defense industry, the Intelligence Community, or with other U.S. Government agencies

• Possess active and transferable U.S. government issued Top Secret SCI (TS/SCI) security clearance with Full-scope Poly

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 ​

• Relocation Eligibility – Eligible

• 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. This position is classified as:

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 145,600 USD - 276,800 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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