Full-Time

Principal Signals Software Engineer

Posted on 12/13/2025

RTX

RTX

10,001+ employees

Aerospace, defense, and avionics manufacturer

Compensation Overview

$101k - $203k/yr

+ 401(k) Match + Incentive Programs

No H1B Sponsorship

Aurora, CO, USA + 2 more

More locations: State College, PA, USA | Odenton, MD, USA

In Person

Onsite role; relocation assistance available.

US Top Secret Clearance Required

Category
Software Engineering (1)
Requirements
  • Active and transferable TS/SCI with Polygraph U.S. government issued security clearance prior to start date with the adjudication date less than three years ago from your starting date for this position. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
  • Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of eight (8) years of prior relevant experience unless.
  • Experience as a Signals Software Engineer (SSWE) or equivalent on a project with a focus on Radio Frequency (RF) to include experience with Fourier transforms, filtering, communications theory, digital modulation, error control coding, signals analysis tools (e.g., Wigner-Ville transform (WVT), DVT), and digital signal processing (e.g., adaptive beamforming/ filtering, demodulation).
Responsibilities
  • Design, develop and modify software systems, using scientific analysis and mathematical models to predict and measure outcome and consequences of design.
  • Collaborate with the engineering team to integrate signal processing software with satellite ground systems.
  • Develop and implement algorithms for signal processing, including Fourier transforms, digital signal processing, and RF signal processing.
  • Analyze and optimize signal processing algorithms for improved performance.
  • Troubleshoot and resolve issues related to signal processing software.
  • Lead one or more software development teams and ensure the work is completed in accordance with the constraints of the software development process being used on any project.
  • Follow established Software processes and procedures, development, documentation and maintenance/management of operations concepts and requirements.
Desired Qualifications
  • Experience with software defined radio architectures.
  • Experience in programming languages such as Java, C, C++, and Python.
  • Experience with satellite communication systems and ground systems.
  • Experience with commercial wireless standards
  • Experience with geolocation techniques
  • Experience with software configuration management
  • Experience with Python and Matlab.

RTX designs and builds products for both civilian aviation and national defense. Its main units are Collins Aerospace (avionics, interiors, flight systems, and other aircraft technologies), Pratt & Whitney (aircraft engines and propulsion systems), and Raytheon (missiles, sensors, cybersecurity, and other defense technologies). The products work by integrating advanced propulsion, avionics, and defense systems into airplanes and military platforms to improve performance, safety, and security. RTX differs from competitors by combining a broad, integrated portfolio across commercial aviation and defense under one company, with a long history from two historic aerospace and defense groups and a strategy focused on providing end-to-end aerospace and defense solutions. Its goal is to be a leading supplier of reliable, high-performance systems and services for civil aircraft, military platforms, and national security missions.

Company Size

10,001+

Company Stage

IPO

Headquarters

Arlington, Virginia

Founded

2022

Simplify Jobs

Simplify's Take

What believers are saying

  • Pratt & Whitney's $100M Poland plant boosts engine production 30% by 2028 amid surging demand.
  • $3.7B Ukraine Patriot GEM-T contract drives Raytheon 10% Q1 sales growth from geopolitical tensions.
  • Commercial aftermarket sales rise 19% as airlines extend older aircraft operations.

What critics are saying

  • Pratt & Whitney GTF durability issues ground A320neo fleets, slashing aftermarket revenue 20-30%.
  • Lockheed Martin and Northrop Grumman capture 40% hypersonic interceptor market in 12-24 months.
  • SpaceX Starshield wins $4B NRO contract, obsoleting Raytheon OPIR satellites in 18-24 months.

What makes RTX unique

  • RTX integrates Pratt & Whitney engines, Collins Aerospace avionics, and Raytheon missiles under one 2020 merger.
  • Raytheon delivers NGG satellite sensors detecting hypersonic missile heat signatures for US Space Force.
  • RTX maintains 90-year consecutive cash dividends with $271B Q1 2026 backlog across commercial and defense.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

Life Insurance

Disability Insurance

401(k) Company Match

401(k) Retirement Plan

Flexible Work Hours

Remote Work Options

Paid Vacation

Paid Sick Leave

Paid Holidays

Parental Leave

Family Planning Benefits

Fertility Treatment Support

Adoption Assistance

Employee Assistance Plan

Wellness Program

Gym Membership

Tuition Reimbursement

Student Loan Assistance

Home Office Stipend

Phone/Internet Stipend

Short-term Disability

Long-term Disability

Employee Scholar Program

Three weeks of vacation for newly hired employees

Generous 401(k) plan that includes employer matching funds

Ovia Health, fertility, and family planning

Bright Horizons, child and elder care services

Doctor on Demand, virtual doctor visits

Teladoc Medical Experts, second opinion program

Company News

PR Newswire
Apr 14th, 2026
Air Canada's A321XLR fleet to feature Collins Aerospace Aurora suites and economy seats

Collins Aerospace, an RTX business, and Air Canada have announced that Air Canada's new Airbus A321XLR fleet will feature Collins seating throughout. Each aircraft will have 14 Aurora business class suites and 168 Meridian+ economy seats. The custom lie-flat Aurora suites, unveiled at the Aircraft Interiors Expo in Hamburg, are designed to provide a widebody business class experience on single-aisle aircraft. The suites' proprietary shape maximises passenger living space whilst expanding galley capacity for long-haul service. The Meridian+ economy seats incorporate widebody design principles with contoured architecture to provide additional space for passengers. Air Canada has selected enhanced seatback options for improved stowage, inflight entertainment and power supply. The first of 30 Air Canada A321XLRs will enter service this spring.

PR Newswire
Apr 13th, 2026
RTX's Raytheon unveils event-based mid-wave infrared camera for real-time high-speed threat tracking

Raytheon, an RTX business, has successfully demonstrated a first-of-its-kind event-based mid-wave infrared camera that tracks high-speed objects in real time whilst reducing processing and power demands. Unlike traditional cameras that capture full frames, the event-based camera tracks only pixel-level motion, producing a continuous stream of events. During a demonstration in Northern California, the camera tracked multiple targets including ground vehicles, aircraft and live fires by capturing rapid motion unachievable with conventional infrared cameras. By reporting only changes in motion rather than full image frames, it delivered near-instantaneous activity views. Developed under DARPA's FENCE programme, the technology has potential applications in battlefield awareness, missile guidance and surveillance. Raytheon is now exploring follow-on demonstrations across broader mission scenarios.

Yahoo Finance
Apr 4th, 2026
RTX secures $6.6B F-35 engine contract and releases open-source cyber defense toolkit

RTX has secured a multibillion-dollar contract for F135 engine production supporting the F-35 Joint Strike Fighter programme, whilst its subsidiary BBN Technologies released Maude-HCS, an open-source cyber defence toolkit funded by the Defense Advanced Research Projects Agency. The F135 award, valued at approximately $3.8 billion under one modification and referenced as a $6.6 billion package across lots 18 and 19, reinforces Pratt & Whitney's position on the F-35 programme. The Maude-HCS toolkit enables modelling and validation of covert communication networks for cyber defence efforts. RTX shares last closed at $196.21, returning 69.9% over the past year. The announcements deepen RTX's involvement in both software-centric and hardware-heavy defence missions, adding to the company's existing backlog alongside peers including Lockheed Martin and Northrop Grumman.

PR Newswire
Apr 1st, 2026
RTX's BBN Technologies releases open-source Maude-HCS toolkit to validate covert cyber networks

RTX's BBN Technologies has released Maude-HCS, an open-source toolkit that enables cyber defence teams to model, test and validate covert communication networks. Funded by DARPA under its PWND2 program, the toolkit is now available on GitHub. Maude-HCS predicts latency, data rate and detection timelines with just 1% to 9% error compared to experimental deployments. The system replaces weeks of trial-and-error testing with automated analysis delivering results in hours, running on standard eight-core servers. Hidden communication systems are critical for national security and internet freedom, allowing journalists and armed forces to exchange information safely in high-risk environments. The toolkit enables rigorous validation of covert channels before deployment, helping ensure they remain both effective and undetectable whilst meeting mission requirements.

PR Newswire
Mar 31st, 2026
Pratt & Whitney wins $6.6B F135 engine contract to boost F-35 production

Pratt & Whitney, an RTX business, has been awarded a $6.6 billion contract for lots 18-19 of the F135 engine, which powers all F-35 Lightning II variants. The contract modification includes $3.8 billion for production, engines, spares, modules and support services. The company is investing heavily to increase production capacity, having committed over $1 billion in the past five years to expand and modernise facilities. These investments have increased current F135 production rates by 20% over previous contract rates. The F135 programme supports over 66,000 jobs across 47 US states and generated more than $9 billion in domestic economic impact in 2025. Pratt & Whitney has delivered over 1,400 production F135 engines for the F-35 programme, which serves 20 allied nations worldwide.

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