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

... 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 ...

You'll design interfaces between mobile apps, backend services, and IoT devices. Experience ... Comfort with on-call responsibility. Our customers rely on our systems to heat & cool their homes.

Act as senior oncall escalation and lead high-severity incident response About You * 10+ years ... Strong experience with C# / .NET Core (or similar back-end tech) * Proficiency with JavaScript ...

... internal developer tooling that other engineering teams build on. We work closely with product ... Design and deliver backend and platform services that power AI agent workflows - request/event ...

Maintaining the system in general, on-call bug-fixing for mission-critical issues * Own new ... Backend: Python, Django, Postgres, Redis. * Distributed Computing: Task Queues, Celery, RabbitMQ

Software Engineer, Core Platform

Toronto, ON · On-site

CA$105K - CA$195K/yr

... building scalable backend services for Kong Konnect and the Developer Portal. You'll develop ... Participate in on-call rotation to ensure high availability of platform services. * Contribute to ...

Participate in a 24x7 on-call rotating schedule (if applicable), supported by senior team members ... Knowledge of backend systems such as C# .NET Core / .NET 7+. IMP. * Understanding of version ...

... backend services, cloud infrastructure, deployment systems, and developer tooling that enable AI ... Participate in an on-call rotation supporting customer-facing systems and internal platform tooling ...

... pipelines and processes * 24/7 On-call support rotation required to support emergency ... Experience working with backend Java services and database technologies (Postgres, NoSQL, etc.

Design and evolve scalable, multi-tenant backend services and APIs to support a variety of product ... Perform on-call rotation for in-time service recovery to guarantee the health of the production ...

Senior IT Developer

Toronto, ON · On-site +1

CA$102K - CA$125K/yr

... in on-call support and root-cause analysis Required Experience 6+ years backend or distributed ... Developer/Administrator for Apache Kafka Azure Solutions Architect Expert or Azure Developer ...

Software Developer

Toronto, ON · On-site +1

CA$101K - CA$118K/yr

... rotating on-call support for SalesForce.com and Marketo applications. Key Accountabilities ... backend solutions (Apex and APIs) as well as system integration * Familiarity with data governance ...

The Applied AI team is looking for a Backend Engineer to join the AI Entries team. You will build ... Participate in the team's on-call rotation; identify, triage, debug, and resolve issues across our ...

Showing results 21-40

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.

Full Stack Web Developer -Electric Eye

GHGSAT

Ottawa, ON • Remote

Full-time

Medical, Dental, PTO

Re-posted 22 days 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. 

Our capability is unique: we provide high-resolution, local measurements of atmospheric methane and carbon dioxide concentration from remote sensors, enabling precise detection, visualization, and quantification of greenhouse gas emissions. 

We are looking for an innovative Full Stack Web Developer for our Electric-Eye team working a web application enabling the processing and visualization of remote sensing data.  As part of a cross-functional Agile Scrum team, you will design, develop, test, deploy, and support our post-processing software. You should be comfortable around both frontend and backend coding languages, development frameworks and third-party libraries. Overall, you have an excellent knowledge of web technologies, security standards and best practices, along with a strong motivation in tackling the important environmental issues that our planet faces today. 

Responsibilities: 

  • Develop tools and application features to improve the workflow of processing emission-related data 
  • Evaluate, integrate and support frontend and backend services, databases, data transformation frameworks, and APIs 
  • Take ownership of the implementation of new features throughout their lifecycle from wireframes and system requirements through testing, implementation and support 
  • Optimize data structures, schemas and queries for performance and scalability 
  • Collaborate regularly with the team to design and evolve system architecture 
  • Maintain and ensure high availability of the data processing platform 
  • Liaise with developers, designers, QA and product stakeholders to identify new features 
  • NOTE: This role requires participation in a shared on call rotation with other members of the team. 

Requirements

Required skills

    • Strong computational science or software development skills 
    • Proven capability with JavaScript, Typescript, and Python 
    • Experience with modern web technologies (React.js, Node.js, Tailwind CSS, HTML5) 
    • Experience with building and consuming REST APIs' 
    • Experience with AWS services (EKS, ECR, S3, DynamoDB) 
    • Competence with databases (PostgreSQL, NoSQL) 
    • Experience using software development tools such as Git version control and Docker 
    • Experience designing and implementing services in a cloud-native environment (AWS) 
    • Ability to independently deliver well-defined features with minimal supervision 
    • Availability to participate in a scheduled on-call rotation and provide occasional support outside regular business hours, including weekends, to ensure operational continuity. 

 Assets

    • Experience with web-based geospatial visualization tools (OpenLayers, WebGL) 
    • Experience working with geospatial and remote sensing data formats (e.g., GeoTIFF, GeoJSON, raster/vector data) 
    • Interest in scientific analysis, atmospheric sciences, remote sensing and space technology 

  Qualifications

    • Bachelor's degree in Computer Science or Software Engineering  
    • 2+ years of 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.