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Senior Software Engineer Jobs in Cornwall, ON (NOW HIRING)

Micro1

Remote Senior Software Engineer

Hamilton, ON · Remote

Senior Software Engineer $50 - $100/hourpay Required Skills Python3 JAVA Rust Algorithms Basics C++ Typescript bug fixing feature implementation codebase refactoring performance optimization About ...

Providius

Software Engineer

Hamilton, ON · On-site

Strong fundamentals in computer science and software engineering * Ability to take ambiguous problems and turn them into working, maintainable solutions * Comfortable working across different parts ...

Micro1

Remote GitHub Contributor

Cornwall, ON · Remote

Remote micro1 is engaging expert Senior Software Engineers to support a customer's innovative project. In this role, you'll apply your expertise to help train next-generation AI systems. Your work ...

Micro1

Remote GitHub Contributor

Les Coteaux, QC · Remote

Remote micro1 is engaging expert Senior Software Engineers to support a customer's innovative project. In this role, you'll apply your expertise to help train next-generation AI systems. Your work ...

Micro1

Remote GitHub Contributor

Hamilton, ON · Remote

Remote micro1 is engaging expert Senior Software Engineers to support a customer's innovative project. In this role, you'll apply your expertise to help train next-generation AI systems. Your work ...

Spark Power

Senior Civil/Structural Engineer

Hamilton, ON · On-site

$100K - $120K/yr

Senior Civil/Structural Engineer Spark Power is looking for a Senior Civil/Structural Engineer to ... Must have a working knowledge and ability to use programs such as structural design software S ...

New

Egis Group

Senior Planner

Hamilton, ON · On-site

In this senior-level role, you will be responsible for developing, managing, and optimizing ... and engineering coordination. * Proficiency with project management software (Primavera P6 ...

Wood Plc

Senior Geochemist

Hamilton, ON · On-site +1

Our team includes geochemists with backgrounds in geology, aqueous geochemistry and engineering ... Demonstrated abilities with geochemical and water quality modeling using industry-standard software ...

Stryker

Senior Product Manager (Hybrid)

Hamilton, ON · On-site +1

CA$97K - CA$129K/yr

As a Senior Product Manager supporting Stryker's Smart Care portfolio, you will help shape the ... Experience collaborating with engineering, software development, data analytics, or technology ...

AECOM

Senior Fluvial Geomorphologist

Hamilton, ON · On-site

The fluvial geomorphologist will work with AECOM's team of geomorphologists, hydraulic engineers ... Familiarity with GIS and CAD software * Knowledge of fluvial form, processes, and functions ...

Egis Group

Archaeologist

Hamilton, ON

We are now over 21,000 engineers, architects, scientists and planners across the world and ... Complete archaeological fieldwork under the supervision of our Senior Project Archaeologist ...

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Showing results 1-20

All JobsSoftware Engineer JobsSenior Software Engineer JobsSenior Software Engineer Jobs in Cornwall, ON

Senior Software Engineer information

See Cornwall, ON salary details

$64.4K

$119.9K

$170.9K

How much do senior software engineer jobs pay per year?

As of Aug 10, 2026, the average yearly pay for senior software engineer in Cornwall, ON is $119,915.00, according to ZipRecruiter salary data. Most workers in this role earn between $99,738.00 and $135,567.00 per year, depending on experience, location, and employer.

What is a senior software engineer?

A senior software engineer designs, codes, tests, and maintains computer software. While these are your primary responsibilities as a senior software engineer, you may also have supervisory duties. These include overseeing a team of junior software engineers or developers. The senior software engineer title is sometimes used interchangeably with senior developer, and positions for both may share similar job duties and responsibilities. In general, software engineers are distinguished from developers in that software engineers apply engineering principles to software development.

What are some common challenges senior software engineers face when mentoring junior team members?

Senior Software Engineers often mentor junior colleagues, which can be incredibly rewarding but also presents challenges. Balancing mentorship with project deadlines can be demanding, as it requires strong time management and communication skills. Additionally, adapting explanations to different learning styles and levels of experience can be tricky. However, effective mentorship helps build a stronger team and can lead to enhanced leadership opportunities for the senior engineer.

What is the difference between Senior Software Engineer vs Software Developer?

AspectSenior Software EngineerSoftware Developer
CredentialsBachelor's or higher in CS or related field; experience often 5+ yearsBachelor's in CS or related field; entry to mid-level experience
Work EnvironmentDesigning complex systems, leading projects, mentoringWriting code, developing features, debugging
Industry UsageUsed across tech companies, startups, enterpriseCommon in software firms, startups, freelance work
Search & ComparisonOften compared for experience level, responsibilitiesCompared for entry-level to mid-level roles

The main difference between a Senior Software Engineer and a Software Developer lies in experience, responsibilities, and scope. Senior Software Engineers typically have more experience, lead projects, and mentor others, while Software Developers focus on coding and feature development. Both roles are essential in tech companies, but the Senior Software Engineer position involves higher-level planning and leadership.

What are the key skills and qualifications needed to thrive as a senior software engineer, and why are they important?

To thrive as a Senior Software Engineer, you need advanced programming skills, deep understanding of software architecture, and several years of experience in software development, often supported by a relevant degree. Familiarity with tools like Git, CI/CD pipelines, cloud platforms, and expertise in technologies such as Java, Python, or JavaScript are typically required. Leadership, problem-solving, and effective communication are crucial soft skills for mentoring teams and collaborating across departments. These skills ensure the delivery of robust, scalable solutions and drive successful project outcomes in complex technical environments.
More about Senior Software Engineer jobs
What are popular job titles related to Senior Software Engineer jobs in Cornwall, ON? For Senior Software Engineer jobs in Cornwall, ON, the most frequently searched job titles are:
What cities near Cornwall, ON are hiring for Senior Software Engineer jobs? Cities near Cornwall, ON with the most Senior Software Engineer job openings:
Senior Software Engineer jobs near you

Remote Senior Software Engineer

Micro1

Hamilton, ON • Remote

Full-time

Posted 10 days ago

Job description

Senior Software Engineer
$50 - $100/hourpay
Required Skills
Python3
JAVA
Rust
Algorithms
Basics C++
Typescript
bug fixing
feature implementation
codebase refactoring
performance optimization
About micro1
micro1 is the leading AI data lab for training frontier models and evaluating AI agents. Experts contribute their diverse subject matter knowledge across domains such as finance, healthcare, STEM engineering, and more. micro1 transforms that real-world expertise into high-quality training data, evaluations, and feedback loops that improve how AI systems learn, reason, and perform.

Our platform identifies and vets top talent through an AI recruiter, enabling high-quality expert contributions at scale. We aim to enable 1 billion people to do meaningful work by applying their expertise to AI. As our global expert network grows, micro1 is building the human intelligence layer for frontier AI.

Job Title: Senior Software Engineer


Job Type: Contractor (~15 hrs a week)


Location: Remote


Job Summary: In this role, you'll apply your expertise to help train next-generation AI systems. Your work will shape how models learn, reason, and perform through high-quality, real-world input. No prior experience in AI is required — your domain knowledge is what matters.


As an expert you will be creating Reinforcement Learning Environments which test an AI model’s ability to solve complex software engineering problems using Model Context Protocol (MCP) tools. Tasks may involve fixing bugs, implementing features, refactoring code, or optimizing performance while requiring agents to discover and reason over information from real MCP servers. You will design reproducible environments, deterministic verification, and golden reference solutions that accurately measure both MCP tool use and software engineering ability.



Required Skills and Qualifications:

  1. Proficiency in C++, Python, JAVA, GoLang, Typescript, or Rust.
  2. Deep understanding of algorithms, data structures, and performance tuning.
  3. Demonstrated experience in debugging complex software issues and delivering maintainable solutions.
  4. Strong background in feature development and codebase refactoring.
  5. Proven ability to optimize software for performance and scalability.
  6. Exceptional written and verbal communication skills, with a keen attention to detail.
  7. Track record of success in collaborative, cross-functional teams, ideally in remote settings.



Preferred Qualifications:

  1. Previous experience working on large-scale, distributed codebases.
  2. Familiarity with modern AI or machine learning systems is a plus, though not required.
  3. Background in participating in rigorous code reviews and contributing to the development of software best practices.


Process:

  1. Apply to the role, filling out the screening questions
  2. Complete AI Interview (approx. 30 minutes)
  3. Technical Assessment (Tentative)
  4. Hiring Manager review


Compensation Structure

Compensation is output-based; experts are paid per task that meets the project specifications. The time required to complete work may vary depending on the expert’s experience and workflow. Minimum submission requirements apply. Experts must submit a minimum of tasks per week.


Start Timeline & Availability

We typically fill roles within 48 hours and are looking for experts ready to jump in right away. If selected, we expect you to start your first tasks within 24–48 hours of completing onboarding.

Apply