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Junior Systems Developer Jobs in London, ON (NOW HIRING)

Squarepoint Capital

Junior Quant Developer

London, ON

As a Quant Developer at Squarepoint you will work side-by-side with Quant Researchers and Traders ... Ability to work effectively with AI tools and systems, including demonstrable experience using them ...

Steelway Building Systems

Engineering Manager

Aylmer, ON · On-site

Steelway Building Systems is committed to providing our customers with the highest quality products ... You will play a key role in guiding junior staff, collaborating across departments, and ensuring ...

ZTR

Senior Firmware Developer

London, ON · On-site

Mentor junior and intermediate developers in best practices and edge computing design Who are you ... Experience with Real-Time Operating System (RTOS) application development and integration

ZTR

Senior Firmware Developer

London, ON

Mentor junior and intermediate developers in best practices and edge computing design Who are you ... Experience with Real-Time Operating System (RTOS) application development and integration

Bullish

Senior Engineer, Risk Engineering

London, ON · On-site

Bridging quantitative finance and systems engineering, we optimize the mission-critical risk ... Interest or minor experience in mentoring junior peers and contributing to a collaborative ...

WinAir

Intermediate Full-Stack Java Developer

London, ON · On-site +1

... systems. Today, WinAir is a fully browser-based solution, used in more than 30 countries. As it ... Provide technical support to junior developers as needed. * Propose creative solutions to ...

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All JobsSystems Developer JobsJunior Systems Developer JobsJunior Systems Developer Jobs in London, ON

Junior Systems Developer information

See London, ON salary details

$25.9K

$76.2K

$125.6K

How much do junior systems developer jobs pay per year?

As of Aug 21, 2026, the average yearly pay for junior systems developer in London, ON is $76,215.00, according to ZipRecruiter salary data. Most workers in this role earn between $50,926.00 and $97,969.00 per year, depending on experience, location, and employer.

What is a junior systems developer?

A Junior Systems Developer is an entry-level IT professional who assists in designing, developing, testing, and maintaining software systems and applications. They typically work under the supervision of senior developers, helping to write code, debug programs, and support the development process. Junior Systems Developers often collaborate with other team members to ensure that software solutions meet user requirements and function efficiently. This role is ideal for individuals starting their careers in software development and seeking to build foundational technical and problem-solving skills.

What are the key skills and qualifications needed to thrive as a junior systems developer?

To thrive as a Junior Systems Developer, you need a solid understanding of programming languages (such as Java, Python, or C#), basic software development principles, and often a relevant degree or diploma in computer science or a related field. Familiarity with development environments, version control systems like Git, and possibly certifications such as CompTIA or Microsoft Fundamentals are commonly expected. Strong problem-solving abilities, attention to detail, and effective communication help you collaborate with teams and learn quickly on the job. These skills and qualities are crucial for building reliable systems, adapting to new technologies, and contributing effectively to software projects.

What are some common challenges faced by junior systems developers during their first year on the job?

Junior Systems Developers often encounter challenges such as understanding complex legacy systems, adapting to new development tools and workflows, and balancing multiple project priorities. It's common to feel overwhelmed at first, but most teams provide mentorship and code reviews to support your learning curve. Collaboration with senior developers and open communication are key to overcoming obstacles and growing your technical skills.

What is the difference between Junior Systems Developer vs Junior Software Engineer?

AspectJunior Systems DeveloperJunior Software Engineer
Required CredentialsTypically a degree in Computer Science or related field; some certifications like CompTIA or Cisco are commonSimilar credentials; often holds a degree in Computer Science or Software Engineering; certifications like Microsoft or AWS may be relevant
Work EnvironmentWorks mainly on system infrastructure, networks, and hardware integration within organizationsFocuses on developing, testing, and maintaining software applications across various platforms
Employer & Industry UsageUsed in IT departments, tech companies, and organizations with complex infrastructure needsCommon in software firms, tech startups, and companies developing software products

While both roles require technical skills and similar educational backgrounds, Junior Systems Developers primarily focus on system infrastructure and hardware integration, whereas Junior Software Engineers concentrate on software development and programming. The choice depends on whether you prefer working with systems and networks or software applications.

What job categories do people searching Junior Systems Developer jobs in London, ON look for?

The top searched job categories for Junior Systems Developer jobs in London, ON are:

What cities near London, ON are hiring for Junior Systems Developer jobs?

Cities near London, ON with the most Junior Systems Developer job openings:

Junior Systems Developer jobs near you
Infographic showing various Junior Systems Developer job openings in London, ON as of August 2026, with employment types broken down into 1% As Needed, 81% Full Time, 13% Part Time, 4% Contract, and 1% Nights. Highlights an 88% Physical, 2% Hybrid, and 10% Remote job distribution, with an average salary of $76,215 per year, or $36.6 per hour.

Junior Software Developer (C++)

Squarepoint Capital

London, ON

Full-time

Re-posted 16 days ago

Job description

Please only apply to the one job you feel best fits your skillset and experience. If our team feels you are better suited for another role, we will reach out about the alternate opportunity.

Position Overview:

At Squarepoint we use C++ to build the majority of our low latency and high performance systems, which are directly responsible for executing the critical trading path. Your work in this domain will have a direct impact on our trading success: powering critical trading operations, serving low latency market data or providing crucial market connectivity access to our daily trading operations. You could be driving the design and implementation of trading frameworks, centralised services processing massive volumes of data, or other high-volume distributed applications at Squarepoint.

Whichever project you work on, you will be pushing the boundaries of high performance software, and growing your skills in a highly collegiate work environment.

Required Qualifications:  

  • Degree in Computer Science, Computer Engineering, or other degree with a heavy emphasis on software development,
  • Up to 4 years experience in a relevant role such as software or quant development, or similar
  • Experience with C++, git, and Linux
  • Excellent written and verbal communication skills
  • Eagerness to continuously learn new technologies and develop with us
  • Ability to work well in a fast-paced environment

Nice to Have:

  • Degree with emphasis on low-level systems programming, high performance computing, or similar
  • Experience with any one of: KDB+/q, Python
  • Experience working in an investment or financial business is useful

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