Date Posted:2026-08-27 Country:United States of America Location:US-MA-MARLBOROUGH-MA3 ~ 1001 Boston Post Rd ~ BLDG 3 Position Role Type:Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: U.S. citizenship is required, as only U.S. citizens are authorized to access information under this program/contract. Security Clearance Type: None/Not Required Security Clearance Status: Not RequiredOur Connected Aviation – Air Traffic Solutions - Software Engineering Department (ATS-SED) is looking for a talented experienced Principal Software Engineer to join our team developing and supporting our Air Traffic Control Systems worldwide. We develop safety-of-life air traffic management systems for mulit-national customers used for controlling and monitoring civil and military aviation traffic. This is an opportunity to be a subject matter expert and solve complex system issues.What You Will Do:You will develop and maintain software packaged into our ATMS productsYou will maintain documentation and work instructions needed to meet ATS SED’s high maturity level software engineering standards and processes.You will participate in the agile process including daily standups, sprint planning, retrospectives, back log grooming and story pointing. You will work with an integrated engineering team in a highly collaborative environment, requiring frequent multi-level communication with engineering team members, program management and external stakeholders.Qualifications You Must Have: 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 Experience developing, integrating, testing and validating software components in an Unix/Linux environmentExperience with the complete software development lifecycle using C/C++U.S. citizenship is absolutely required, as only U.S. citizens are authorized to access information under these programs/contracts.​Qualifications We Prefer:Proficiency with scripting languages such as Bash and PythonExperience with Agile methodologies and GITExperience in software testing or debugging source codeExperience with containerization technologies ( ex. Docker, Podman, Kubernetes)What We Offer:Some of our competitive benefits package includes: Flexible work weeks: 9/80A, 5/40; Flexible work Hours: Core hours, Modified timeMedical, dental, and vision insuranceThree weeks of PTO for newly hired employeesGenerous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy optionTuition reimbursement programStudent Loan Repayment ProgramLife insurance and disability coverageOptional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protectionBirth, adoption, parental leave benefitsCarrot Health, fertility, and family planningAdoption Assistance Autism BenefitEmployee Assistance Plan, including up to 10 free counseling sessionsHealthy You Incentives, wellness rewards programDoctor on Demand, virtual doctor visitsBright Horizons, child and elder care servicesTeladoc Medical Experts, second opinion program And more! 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. Avionics delivers advanced cockpit displays, vision systems, and comprehensive digital solutions for global government, commercial and business aviation customers. We provide connectivity and managed data services to ensure safety and seamless communication for passengers, crews, and militaries, from aircraft and airports to air traffic management. Join us in creating solutions that connect the world, one flight at a time. Start your application today.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 107,500 USD - 204,500 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. Privacy Policy and Terms:Click on this link to read the Policy and Terms