C++ Senior Software Engineer - Co-Simulation (Remote)

Date Posted:

2026-01-27

Country:

United States of America

Location:

US-NC-REMOTE

Position Role Type:

Remote

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 Required

Collins Aerospace is seeking a highly skilled and experienced Senior Software Engineer to support the development, sustainment, and maintenance of an in-house custom-built co-simulation application and framework called DESYRE.  This role will drive technical excellence by ensuring robust backend architecture, delivering new features, and resolving critical defects. The engineer will work closely with the Product Team to serve as a technical leader, applying deep knowledge of computational models, hybrid system execution, and interoperability standards to advance aerospace engineering simulation capabilities.

**This is a remote position**

What YOU will do:

• Develop, maintain, and design simulation models and frameworks that integrate physics models, flight dynamics, and real-time embedded software components.

• Lead the development and maintenance of components within the custom simulation application environment, including quality assurance, bug triage, and resolution to ensure stability and accuracy.

• Design and support Virtual test assets and co-simulation strategies for system/software validation while collaborating with cross-functional teams to define system specifications and ensure simulation fidelity meets performance requirements

• Engineer and mature new features, such as updating the Simulation Application to support SysMLv2 integration.

• Apply advanced knowledge of Models of Computation and Execution Semantics (synchronous languages, state machines, discrete event, continuous time, hybrid systems).

• Design and support virtual test assets and co-simulation strategies for system and software validation, applying advanced knowledge of Models of Computation and Execution Semantics (synchronous languages, state machines, discrete event, continuous time, hybrid systems).

• Ensure compliance and innovation in hybrid systems model-exchange and co-simulation standards (FMI, TLM, HLA, ED247, DPC).

• Provide technical leadership in software design principles, architecture patterns, and system integration.

• Collaborate with cross-functional teams, including systems and software engineering, model-based design, and test engineering, to define system specifications, ensure simulation fidelity, and deliver end-to-end simulation solutions.

• Mentor junior engineers and contribute to engineering excellence practices across the enterprise.

Qualifications YOU Must Have:

• Must be a U.S. Citizen.

• Typically requires a University Degree and minimum 10 years prior relevant experience or an Advanced Degree in a related field and minimum 7 years of experience.

• Typically requires a University Degree and minimum 10 years prior relevant experience or an Advanced Degree in a related field and minimum 7 years of experience.

• 10+ years of professional software engineering experience, with at least 5 years in aerospace, defense, or high-reliability systems.

• Experience with principles in the domain of modelling (model management, model transformation, etc) and simulation (multi-formalism, hybrid simulation, co-simulation, etc.)

• Experience with co-simulation and model-exchange standards: Functional Mock-up Interface (FMI), Transaction-Level Modeling (TLM), High-Level Architecture (HLA), Distributed Parallel Co-simulation (DPC)

• Proven Expertise in Python, C++, SystemC, and strong familiarity with IEEE Std 1666-2023.

• Strong background in software design principles, architecture, and system integration.

• Demonstrated ability to lead technical efforts, mentor teams, and deliver complex projects.

Qualifications We Prefer:

• Experience in aerospace/defense simulation or safety-critical systems.

• Knowledge of model-based theory (abstract interpretation, static and dynamic analysis), practice (experience with modeling and simulation environments, solvers, etc.), and a good knowledge of mathematical formalization, discrete and continuous dynamics modeling.

• Expert-level knowledge of Models of Computation and Execution Semantics (synchronous, discrete-event, continuous-time, hybrid).

• Experience with simulation software tools and model-based Systems Engineering/design (e.g., MATLAB/Simulink, Cameo/TeamWork Cloud (TWC), Siemens Vista)

• Familiarity with avionics hardware, integrated circuits and communication protocols/standards such as CAN, ARINC 429/664/653, MIL-STD-1553, and ED247.

• Familiarity with Agile process or Frameworks such as Scaled Agile (SAFe).

• Familiarity with DevSecOps pipelines, model-based engineering (MBSE, MB Design, MB Definition), and digital engineering environments.

• Knowledge of real-time and distributed simulation architecture.

• Active security clearance or ability to obtain one.

What We Offer:

Some of our competitive benefits packages include:

• 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!

Do you want to be part of a new, exciting initiative to combine foundational IT with new digital technologies?  Our Digital Technology team is driving business efficiencies and a better customer experience by connecting technologies, people, information and processes. From making aircraft more electric, intelligent and integrated to building new software platforms such as Internet of Things, big data, artificial intelligence, and blockchain, there’s no better place to be right now than in digital. If you’re an agile thinker who enjoys utilizing modern technology to make big improvements, then you’re a perfect fit for this team. Join Collins Aerospace to help us revolutionize the aerospace industry today!

WE ARE REDEFINING AEROSPACE.

* Please consider the following role type definitions as you apply for this role.

Remote: Employees who are working in Remote roles will work primarily offsite (from home). An employee may be expected to travel to the site location as needed.

Regardless of your role type, collaboration and innovation are critical to our business and all employees will have access to digital tools so they can work with colleagues around the world – and access to Collins sites when their work requires in-person meetings.

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 132,400 USD - 251,600 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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