Principal Platform Software Engineer (Onsite)

RTX Corporation; El Segundo (CA); On-site; USD 118,000 - 225,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Three weeks of vacation

Generous 401(k) plan with employer匹配

Tuition reimbursement

Student Loan Repayment Program

Life insurance

Disability coverage

Relocation assistance

Job summary

RTX Corporation's Collins Aerospace division in El Segundo, CA is seeking a Principal Software Engineer to design, develop and maintain our embedded Linux OS ecosystem for mission systems.

You will work with hardware teams to build BSPs, kernels, drivers, and toolchains, perform root cause analysis, and deliver robust software with DevSecOps practices across multiple targets and platforms.

Qualifications

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experience
• 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
• Proficiency with embedded C/C++
• Proficiency with scripting languages (Bash and Python)
• Experience with embedded Linux device drivers
• Experience with board bring-up and target hardware integration
• Experience with debugging and root cause investigations using hardware schematics and tools such as logic analyzer and Wireshark
• Experience with GIT and SVN version control systems
• Experience packaging custom Linux distribution with Buildroot.
• Experience in developing and maintaining Linux BSPs for embedded systems
• Development experience Agile methodologies and DevSecOps
• Experience with industry cost estimation tools such as SEER-SEM

Responsibilities

• Design, develop and continuously enhance our customized Linux OS ecosystem and maintain ownership over areas such as build toolchain, kernel, root filesystem, bootloader, device drivers, and BSP for a wide variety of hardware boards
• Contribute to the design, coding, testing, delivery and ongoing support for embedded Linux software systems
• Participate in root cause analysis and resolution of complex hardware-software issues
• Prepare software builds for execution in a simulation environment, reference platforms and on the target hardware
• Understand and utilize the appropriate Collins Aerospace processes and tools during product development, resulting in increased product quality and improving customer satisfaction
• Contribute to engineering estimates for new program pursuits

Skills

embedded C/C++

Bash

Python

embedded Linux

drivers

board bring-up

debugging

Git

SVN

Buildroot

Linux BSPs

Agile/DevSecOps

SEER-SEM

Education

STEM degree

Advanced degree

Tools

Git

SVN

Buildroot

Job description

Date Posted: 2026-10-15 Country: United States of America Location: US-CA-EL SEGUNDO-E04 ~ 2006 E El Segundo Blvd ~ BLDG E04 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: Secret - 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.

As a Principal Software Engineer in this organization, you will be involved in the development of state-of-the-art communications, information assurance, and general-purpose processing systems. The Advanced Technology and Capabilities directorate supports some of the most cutting-edge products across the enterprise. We develop innovative solutions that keep our military members safe, connected, and informed. Our team has some of the most knowledgeable experts in the industry and work with all the most recent technologies in embedded software development. Within Collins Aerospace we work alongside FPGA, hardware, and systems teams in order to seamlessly embed our advanced technology into our Mission Systems product portfolio.

What You Will Do

• Design, develop and continuously enhance our customized Linux OS ecosystem and maintain ownership over areas such as build toolchain, kernel, root filesystem, bootloader, device drivers, and board support package (BSP) for a wide variety of hardware boards.
• Contribute to the design, coding, testing, delivery and ongoing support for embedded Linux software systems.
• Participate in root cause analysis and resolution of complex hardware-software issues.
• Prepare software builds for execution in a simulation environment, reference platforms and on the target hardware.
• Understand and utilize the appropriate Collins Aerospace processes and tools during product development, resulting in increased product quality and improving customer satisfaction.
• Contribute to engineering estimates for new program pursuits.

Qualifications

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experience
• 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
• Proficiency with embedded C/C++
• Proficiency with scripting languages (Bash and Python)
• Experience with embedded Linux device drivers
• Experience with board bring-up and target hardware integration
• Experience with debugging and root cause investigations using hardware schematics and tools such as logic analyzer and Wireshark
• Experience with GIT and SVN version control systems
• Experience packaging custom Linux distribution with Buildroot.
• Experience in developing and maintaining Linux BSPs for embedded systems
• Development experience Agile methodologies and DevSecOps
• Experience with industry cost estimation tools such as SEER-SEM

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
• This position is eligible for relocation assistance

Employee Referral Eligible At Collins, the paths we pave together lead to limitless possibility. And the bonds we form – with our customers and with each other -- propel us all higher, again and again.

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.

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.

Privacy Policy and Terms: Click on this link to read the Policy and Terms.

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.

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.