Senior Software Engineer Jobs in Beloit, WI (NOW HIRING)

Date Posted:

2026-08-12

Country:

United States of America

Location:

US-IL-ROCKFORD-P6 ~ 4747 Harrison Ave ~ 4747 HARRISON AVE-P6

Position Role Type:

Hybrid

U.S. Citizen, U.S. Person, or Immigration Status Requirements:

This job requires a U.S. Person. A U.S. Person is a lawful permanent resident as defined in 8 U.S.C. 1101(a)(20) or who is a protected individual as defined by 8 U.S.C. 1324b(a)(3). U.S. citizens, U.S. nationals, U.S. permanent residents, or individuals granted refugee or asylee status in the U.S. are considered U.S. persons. For a complete definition of “U.S. Person” go here. https://www.ecfr.gov/current/title-22/chapter-I/subchapter-M/part-120/subpart-C/section-120.62

Security Clearance Type:

None/Not Required

Security Clearance Status:

Not Required

Join our team in Rockford, IL as a Senior Software Engineer and help develop the embedded software behind advanced aerospace electric power systems. You'll collaborate with talented engineers to build, verify, and certify real-time embedded software in C, working across the full software development lifecycle and contributing to mission-critical technology that keeps aircraft operating safely and reliably.

What You Will Do

• Develop embedded software for aerospace electric power systems.

• Participate in the full software development lifecycle, from planning through certification.

• Design, implement, verify, and validate real-time embedded software in C.

• Collaborate with cross-functional and remote engineering teams to deliver high-quality software.

• Support software certification activities in compliance with aerospace standards.

• Design, develop, and maintain embedded C software for electric power system controls.

• Perform software planning, architecture, implementation, testing, and verification.

• Develop software in accordance with DO-178C (Levels A–C) and other applicable aerospace standards.

• Create and maintain software documentation, requirements, and verification artifacts.

• Troubleshoot, debug, and integrate software with embedded hardware.

• Participate in design reviews, code reviews, and technical discussions.

• Collaborate with systems, hardware, verification, and certification engineers to ensure successful project delivery.

Qualifications You Must Have  

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience  

• Experience with the full embedded software development lifecycle, including requirements decomposition, design, implementation, verification, and certification.

• Strong knowledge of embedded software architecture and C programming.

• Hands-on experience with embedded lab testing using oscilloscopes, in-circuit emulators, and target debuggers.

Qualifications We Prefer

• Experience developing and verifying embedded software in compliance with DO-178 or similar industry standards.

• Proficient in Assembly, Python, and Tcl/Tk programming languages.

• Familiar with Model-Based Development (MBD) using MATLAB/Simulink.

• Experience with real-time embedded operating systems (RTOS) and low-level platform integration, including BSPs, device drivers, and I/O.

• Knowledge of Built-In Test (BIT) development, module self-test, and system protection.

• Experience with configuration and requirements management tools, including IBM Rational Synergy, Change, DOORS, and DXL.

• Strong understanding of ARINC 429, ARINC 629, ARINC 664, CAN, and Ethernet communication protocols.

• Experience with Texas Instruments TMS320F2812 DSPs and Freescale PowerPC microcontrollers.

• Knowledge of generator control systems, embedded control applications, and hardware/software integration.

• Experience leading technical teams and mentoring engineers.

• Understanding of software quality assurance and the software development lifecycle (SDLC).

• Excellent interpersonal, collaboration, and written/verbal communication skills.

What We Offer 

Some of our competitive benefits package includes:    

• 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   

• And more!   

Learn More & Apply Now! 

We make modern flight possible for millions of travelers and our military every second.  Our major product lines are on-board virtually every aircraft flying. Be it keeping passengers safe with our emergency power generation systems or creating a positive in-flight experience through reliable cabin pressure controls and quieter engines, Power & Controls focuses on delivering a best-in-class experience to our customers. We hire the top people in the industry. Their ideas drive our performance, and their integrity keeps our customers happy. Join us as we take flight!  

*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. 

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. 

Apply now and be part of the team that’s redefining aerospace, every day. 

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 86,800 USD - 165,200 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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