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On Call Back End Developer Jobs in Ontario (NOW HIRING)

We are looking for a talented Applied AI Backend Software Developer to join our team and contribute ... Participate in on-call rotations to support critical system issues, ensuring high availability.

We are looking for a talented Applied AI Backend Software Developer to join our team and contribute ... Participate in on-call rotations to support critical system issues, ensuring high availability.

Work closely with a group of Back-End Engineers and Architects to build resilient, massively ... Operational experience such as SRE or on-call, demonstrating ability to diagnose and troubleshoot ...

... on call rotation What you need to succeed: Strong Java developer, with ability to prioritize assign and execute tasks throughout the entire SDLC. Experience designing and developing using RESTful ...

... on call rotation What you need to succeed: Strong Java developer, with ability to prioritize assign and execute tasks throughout the entire SDLC. Experience designing and developing using RESTful ...

... Developer. \n \n \n \n \n \n Day To Day's Of a Service Engineer 50% of the time will involve ... Participate in a regular on call rotation \n * Work with QA to develop test plans\/strategies \n \n ...

Software Engineer (Analysis)

Toronto, ON ยท On-site

CA$120K - CA$200K/yr

You have 3+ years of experience working as a backend engineer. * Willingness to take part in an on-call rotation. * Ability to mentor and be mentored by others. * Experience with observability ...

Mid-morning you might drop into a backend slice: a Go service endpoint or a Python data pipeline ... Participate in a 24x7 on-call rotating schedule (if applicable). What you'll bring to the role ...

... backend services and user-facing features across our product suite. * You will contribute across a ... Participate in compensated on-call rotations to ensure platform reliability * Champion DevOps best ...

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On Call Back End Developer information

What is the difference between On Call Back End Developer vs Web Developer?

AspectOn Call Back End DeveloperWeb Developer
Primary FocusMaintaining and troubleshooting server-side applications during on-call shiftsDesigning, coding, and maintaining website front-end and back-end features
Work EnvironmentOften on-call, responding to issues remotely or on-siteTypically office or remote, with regular working hours
Required SkillsServer management, backend programming languages, troubleshootingHTML, CSS, JavaScript, backend frameworks
CertificationsOften no specific certifications, but backend or server management certifications helpWeb development certifications or related degrees

While both roles involve backend work, the On Call Back End Developer primarily handles server-side issues during on-call periods, focusing on troubleshooting and maintenance. Web Developers work on building and maintaining entire websites, including front-end and back-end components, usually during regular hours. The roles overlap in backend skills but differ in work environment and responsibilities.

What are the most commonly searched types of Back End Developer jobs in Ontario? The most popular types of Back End Developer jobs in Ontario are:
What cities in Ontario are hiring for On Call Back End Developer jobs? Cities in Ontario with the most On Call Back End Developer job openings:
Infographic showing various On Call Back End Developer job openings in Ontario as of August 2026, with employment types broken down into 100% Full Time. Highlights an 50% In-person, and 50% Remote job distribution.

Backend Software Developer (Payload Planner)

GHGSAT

Ottawa, ON โ€ข On-site, Remote

Full-time

Medical, Dental, PTO

Re-posted 11 hours ago


Job description

GHGSat offers greenhouse gas detection, measurement, and monitoring services to industrial and government customers around the world. We use our own satellites and aircraft sensors, combined with third-party data, to help industrial emitters better understand, control, and reduce their emissions.

ย GHGSat's capability is unique: we provide high-resolution, local measurements of atmospheric methane and carbon dioxide concentration from space. This further enables to detect greenhouse gas emitters and to visualize and quantify their emissions.

ย Reporting to the Mission Platform lead, GHGSat is looking for an innovative and experienced Backend Developer for our Payload Planner software. As part of a cross-functional team deployed around Agile Scrum, you will be designing, developing, and supporting satellite planning and tasking software. Your responsibilities will include software development, testing, analyzing data, and contributing to the design and implementation of the software. Overall, you have an excellent knowledge of data structures, databases, streaming pipelines and a strong motivation in tackling the important environmental issues that our planet faces today.

Responsibilities

  • Develop tools and applications to improve the workflow of satellite planning and tasking activities
  • Evaluate, deploy, develop, integrate, test and maintain databases, data transformation frameworks and APIs
  • Optimize data structures, schema, queries for most frequent usage
  • Develop, test, integrate, and deploy backend stack
  • Design System Architecture collectively with the team, revisit regularly
  • Maintain and ensure High Availability of GHGSat data platform

Requirements

Required skills

  • Strong computational science or software development skills
  • Proven capability with: Linux, Python
  • Competence with databases (PostgreSQL, MongoDB)
  • Experience building scalable backend services and APIs - REST/GraphQL, event-driven architecture, microservices, and cloud deployment.
  • Experience with Docker and Kubernetes (k8s) - Nice to have
  • Experience with Frontend (TypeScript, React) - Nice to have
  • Ability to work autonomously, with minimum direction
  • Availability to participate in a scheduled on-call rotation and provide occasional support outside regular business hours, including weekends, to ensure operational continuity.

ย Assets

  • Interest in scientific analysis, atmospheric sciences, remote sensing and space technology
  • Understanding of satellite operations or similar field
  • Experience with GIS and Mapping apps (Mapbox, Leaflet, GeoJSON, GeoTIFF)
  • Bilingual French/English

ย Qualifications

  • Bachelor or Master degree in Computer Science, Software Engineering or related field
  • Minimum of 5 years' experience in relevant roles
  • All applicants must be legally entitled to work in Canada and must meet the requirements of the Canadian Controlled Goods Program (CGP)

Benefits

This is a rare opportunity to work on urgent problems. You'll join a small but high-impact team and help scale a company doing meaningful work for the planet.

  • Competitive salary and stock options for all full-time employees
  • Health and dental benefits
  • Paid time off and floating statutory holidays
  • Flexible work environment

GHGSat offers a creative and highly motivating work environment. We provide competitive compensation, comprehensive benefits, flexible work arrangements, and opportunities for ongoing development.

We are committed to building a diverse and inclusive workplace. GHGSat is an equal opportunity employer and does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, age, or any other legally protected status. If you require accommodation, please notify your recruiter.