Senior Software Engineer

Overview

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Job Title: Senior Software Engineer

Job Location: Mirabel, QC or Enfield, NS

Job Code: 38488

Job Schedule: Day Shift

Compensation Range: Between $113,000 - $163,000 annually

As a Senior Software Engineer within the Software Group, you will serve as a technical authority on software engineering processes, standards compliance, and lifecycle governance across multiple defence and aviation platforms including the CF-18, CT-114, CC-330, and CC-150. You will guide development teams, ensure adherence to applicable standards, contribute to bids and proposals, and mentor the next generation of software professionals. This role demands an individual who bridges rigorous process discipline with hands-on engineering expertise. We have offices in Mirabel, Halifax and Ottawa, hybrid work 3 days per week at the office.

Essential Functions

• Review, critique, and approve software engineering documentation including Software Requirements Specifications (SRS), Software Design Documents (SDD), Software Verification Plans (SVP), and Software Configuration Management Plans (SCMP) for standards compliance and technical accuracy;
• Contribute technical content to Requests for Proposals (RFPs); assess feasibility, estimate effort, define process tailoring strategies, and articulate standards compliance approaches to clients and evaluators;
• Coach and develop junior and intermediate software engineers, conduct structured code and document reviews, and facilitate knowledge transfer on lifecycle processes and certification requirements;
• Perform peer reviews of software artefacts, identify deviations from plans and standards, and work with authors to resolve findings in a constructive and traceable manner;
• Maintain and oversee the Software Configuration Management (SCM) function — baseline definition, change control, configuration status accounting, and configuration audits — in accordance with ISO 12207 and project-specific SCMPs;
• Define, tailor, and improve software development processes and lifecycle models to suit project context, certification level, and contractual obligations;
• Actively participate in all phases of the software development lifecycle — requirements, design, implementation, integration, verification, validation, and maintenance — as a process authority and technical contributor;
• Liaise with clients, certification authorities (e.g., Transport Canada, DND), partners, and internal project teams to align on process expectations, compliance strategies, and technical deliverables.

Qualifications

• University degree in Software Engineering, Computer Engineering, Computer Science, or equivalent experience;
• 10 to 15 years of professional software engineering experience in aviation, defence, or safety-critical systems;
• Demonstrated knowledge of ISO/IEC 12207 and ISO/IEC 15288 lifecycle frameworks;
• Practical experience with DO-178C software development at any Design Assurance Level;
• Experience authoring or reviewing lifecycle plans (including certification plans), SRS, SDD, SVP, and Reports documents;
• Proficiency with .NET technologies (Framework, Core, ASP.NET, Blazor) or equivalent stack;
• Experience with SCM tools (Azure DevOps, Git, ClearCase, or equivalent) and formal SCM processes;
• Ability to lead or facilitate formal software reviews (inspections, walkthroughs, peer reviews);
• Experience contributing to technical bids, RFP responses, or contract proposals;
• Knowledge of relational databases (Oracle, SQL Server, or equivalent);
• Understanding of software verification and validation principles (unit tests, quality assurance);
• Strong technical writing skills for engineering plans, reports, and lifecycle artefacts;
• Bilingualism English and French is an asset.

Preferred Additional Skills

• ISO/IEC 12207 — Software lifecycle processes (acquisition, supply, development, operation & maintenance);
• ISO/IEC 15288 — System lifecycle processes and tailoring;
• DO-178C — Software considerations in airborne systems and equipment certification (DAL B–D);
• DO-278A — Software integrity assurance for CNS/ATM ground-based systems (asset);
• DO-330 / DO-331 — Tool qualification and model-based development supplements (asset);
• MIL-STD-498 / 2167A — Defence software development and documentation standards (asset).

Eligibility Criteria

• Must be eligible for registration with theControlled Goods Program;
• Must be eligible to obtain and maintain a government of Canada Reliability status and Secret Level 2/NATO Secret security clearance;
• Must be eligible to meet the requirements for U.S. International Traffic in Arms Regulations (ITAR).

L3Harris is proud to be an equal opportunity employer and is committed to treating all of its employees and job applicants with respect and dignity and to maintaining a workplace free from discrimination. Anyone applying for a position will be considered without regard to the following: race, national or ethnic origin, colour, religion, age, nationality, ancestry, ethnicity, gender, sex, sexual orientation, gender identity or expression, marital status, family status, genetic characteristics, disability, citizenship status, or conviction for an offence for which a pardon has been granted or in respect of which a record suspension has been ordered, or any other characteristic that is protected by applicable human rights legislation.

L3Harris maintains a drug-free workplace and conducts pre-employment drug and alcohol testing and background checks, in accordance with applicable law. Such results are only accessible and viewed by individuals at L3Harris who have direct responsibility in the hiring process. If you fail to report for a drug and alcohol test, refuse to undergo such test or test positive for the presence of drugs or alcohol, the hiring process may be concluded or your offer of employment may be rescinded, in L3Harris’ sole discretion.

This job is for an existing vacancy

At L3Harris, we foster an inclusive and equitable workplace. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. For applicants with disabilities, we will provide you with accommodation so that you have what you need in order to be at your best.

L3Harris performs background checks prior to employment as all applicants must be eligible for registration with the Controlled Goods Program and obtain and maintain a positive security assessment. Some positions may require a government of Canada “Reliability” status and/or Level 2 (Secret) security clearance. In addition, L3Harris performs pre-employment substance abuse testing where required.