1

Defense Software Engineer Jobs in Ontario (NOW HIRING)

Software Engineer

Ottawa, ON

CA$85K - CA$135K/yr

L3Harris is the Trusted Disruptor in defense tech. With customers' mission-critical needs always in ... Software Engineer Job Location: Ottawa, ON Job Code: 39213 Job Schedule: Day Shift Compensation ...

Software Engineer in Test (SET)

Chatsworth, ON · On-site

CA$140K - CA$165K/yr

Engineering moves at software speed. Manufacturing doesn't. Yet. Machina Labs is changing that. We ... defense, aerospace, and advanced mobility programs will run on. If you want to work on hard ...

In this role, you will bridge software engineering and systems engineering disciplines, driving ... Experience working within fast-paced aerospace, defense, or commercial space startup environments

The Job SRC CAN Ltd is seeking an Intermediate Software Developer to contribute to the design ... Defense (DND) facilities, such as the Shirley's Bay and Tunney's Pasture areas within the National ...

Review, analyze, and provide architecture recommendations on software and application interface ... defense systems. * Documentation & Procurement: Prepare rigorous technical and procurement ...

... defense. Are you the person we are looking for? At QNX, we are building the next generation of ... If you're an early-career systems engineer who thrives on lowlevel systems work, has a strong ...

These markets include aerospace and defense, factory automation, air and water quality ... Senior Software Developer (C++) - Lidar & Geospatial Systems Join Teledyne Optech, part of Teledyne ...

Full Stack Engineer

Chatsworth, ON · On-site

CA$130K - CA$150K/yr

Engineering moves at software speed. Manufacturing doesn't. Yet. Machina Labs is changing that. We ... defense, aerospace, and advanced mobility programs will run on. If you want to work on hard ...

Senior Full Stack Engineer

Toronto, ON · On-site +1

CA$132K - CA$181K/yr

... defense and critical infrastructure sectors. You will contribute across our Go backend and React ... If you have a track record of shipping and owning complex software end-to-end, we want to hear from ...

WHY THIS ROLE IS IMPORTANT TO US We are looking for a Senior Cyber Defense Engineer who wants to be in a technical role. Someone who is comfortable going both wide and deep across our Azure security ...

next page

Showing results 1-20

Defense Software Engineer information

See Ontario salary details

$36K

$114.2K

$179K

How much do defense software engineer jobs pay per year?

As of Aug 15, 2026, the average yearly pay for defense software engineer in Ontario is $114,248.00, according to ZipRecruiter salary data. Most workers in this role earn between $86,000.00 and $139,500.00 per year, depending on experience, location, and employer.

What is a defense software engineer?

A Defense Software Engineer develops, tests, and maintains software for military and defense applications. They work on secure, mission-critical systems such as weapons control, cybersecurity, and communication networks. Their role requires proficiency in programming languages, security protocols, and compliance with defense standards. Due to the nature of the industry, security clearances and adherence to classified information policies are often required.

What are the key skills and qualifications needed to thrive in the defense software engineer position, and why are they important?

To thrive as a Defense Software Engineer, you need expertise in software development, a strong grasp of cybersecurity principles, and familiarity with defense industry standards, typically demonstrated by a degree in computer science, engineering, or a related field. Experience with programming languages such as C++, Java, or Python, knowledge of real-time operating systems, and certifications like Security+ or CISSP are often required. Attention to detail, problem-solving abilities, and the capacity to work collaboratively in multidisciplinary teams are valuable soft skills. These competencies ensure that complex, secure, and mission-critical software solutions are effectively developed and maintained to meet stringent defense requirements.

What types of projects and technologies do defense software engineers typically work on?

Defense Software Engineers often work on projects involving the development and maintenance of software for military systems, such as radar, communications, simulation, or weapons control platforms. They frequently use technologies like embedded systems, secure coding practices, and specialized hardware interfaces. Project work can range from upgrading legacy systems to designing cutting-edge capabilities, often requiring adherence to rigorous security and compliance protocols. Collaboration with systems engineers, hardware teams, and government stakeholders is typical, offering a dynamic and mission-driven work environment. This exposure helps engineers build specialized expertise while contributing directly to national security initiatives.

What job categories do people searching Defense Software Engineer jobs in Ontario look for?

The top searched job categories for Defense Software Engineer jobs in Ontario are:

What cities in Ontario are hiring for Defense Software Engineer jobs?

Cities in Ontario with the most Defense Software Engineer job openings:

Infographic showing various Defense Software Engineer job openings in Ontario as of August 2026, with employment types broken down into 92% Full Time, and 8% Contract. Highlights an 83% In-person, and 17% Hybrid job distribution, with an average salary of $114,248 per year, or $54.9 per hour.

CA$85K - CA$135K/yr

Full-time

Re-posted 21 days ago


Job description

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: Software Engineer
Job Location: Ottawa, ON
Job Code: 39213
Job Schedule: Day Shift
Compensation Range: Between $85,500 - $135,500 CDN annually

We are seeking a Software Engineer to contribute to the design and development of a next-generation communications management suite. The successful candidate will play a key role in designing robust software architectures, developing microservices-based applications, and delivering solutions that enable the monitoring, control, and management of complex communications networks. Working within a multidisciplinary engineering team, you will tackle challenging problems in distributed computing, networking, and real-time systems while supporting mission-critical operational requirements and simulation environments.


Essential Functions:

  • Design software solutions and contribute to software designs;
  • Understand and develop microservices solution that operates in a complex, multi-network environment;
  • Conduct independent research and provide new solutions to problems;
  • Interact with systems engineering on technical issues;
  • Debugging software problems for near real-time simulation; and
  • Conduct and prepare presentations and demonstrations.

Qualifications:

  • Bachelor's degree in Computer Science/Computer or Software Engineering (or equivalent experience), or Electrical or Systems Engineering with software experience;
  • Minimum 7 years software engineering experience which must include object-oriented design and programming, C#, ASP.NET and .Net Core;
  • Experience building web applications, using web technologies and protocols such as C#, ASP.NET, .Net Core, REST APIs, Http, and SignalR;
  • Experience with client-server and networking protocols, such as SNMP, Websockets, and TCP stack;
  • Experience with relational databases (MySQL or others); and
  • Excellent technical communication of ideas and design.

Preferred Additional Skills:

  • Experience with CQRS, Distributed Systems & Akka;
  • Experience designing and developing highly available, fault tolerant and distributed systems;
  • Experience with message broker systems such as RabbitMQ or similar;
  • Strong organizational, analytical, and problem-solving skills combined with a strong technical presence;
  • Work on problems of diverse scope, determining methods and procedures to be used on new assignments, and providing feedback and recommendations to other technical personnel;
  • Able to work independently and in a team-based environment;
  • Experience with web frameworks such as Vue.js or Angular is an asset;
  • Knowledge and /or experiencing in developing or integrating applications is an asset; and
  • Experience in military systems and standards is an asset.

Eligibility Criteria:

  • Must be eligible for registration with the Controlled Goods Program; and
  • Must be eligible to obtain and maintain a government of Canada Reliability status and Secret Level 2/NATO Secret security clearance.

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.

Employment Type: Full-Time