java backend software engineer jobs in Ottawa

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1,887 java backend software engineer job listings in Canada. Find daily updated positions from leading job boards.


  • Ottawa, Ontario, Canada Affirm Full-time

    The Data and Storage Services team is responsible for affirm’s data infrastructure across OLTP and OLAP systems, spanning critical online checkout databases, batch orchestration, streaming infrastructure, event-driven frameworks, BI, analytics tooling, large-scale data platforms, and agentic data tools such as semantic layers and internal platform data...


  • Ottawa, Ontario, Canada Affirm, Inc. Full-time

    We are looking for a Staff Engineer to lead projects and initiatives on the Fraud Decisioning teamYou’ll be responsible for building tools and systems that empower affirm fraud fighting capabilities, work with cross-functional teams to adopt and monitor those and use analytics and data driven decisions to further improve the performance and quality of...


  • Ottawa, Ontario, Canada Affirm Full-time

    At Aff, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The Capacity Modeling team ensures Aff**irm can safely handle forecasted traffic—especially during peak sales events—by translating demand forecasts into concrete, testable...


  • Ottawa, Ontario, Canada Affirm Full-time

    The Engineering team builds systems that power affirm's mission. We take pride in our craft, building reliable, performant, and scalable solutions that touch every part of the business. Whether we're enabling new ways to pay, ensuring our platforms can scale to the most demanding levels in the industry, or developing seamless servicing experiences, our focus...


  • Ottawa, ON, Ottawa Census Division, ON; Ontario, Canada Affirm Full-time

    The Engineering team builds systems that power affirm's mission. We take pride in our craft, building reliable, performant, and scalable solutions that touch every part of the business. Whether we're enabling new ways to pay, ensuring our platforms can scale to the most demanding levels in the industry, or developing seamless servicing experiences, our...


  • Ottawa, ON, Ottawa Census Division, ON; Ontario, Canada Affirm, Inc. Full-time €181,000 - €241,000 Temporary

    The Observability team builds the platform every Affrim engineer relies on to understand the behavior and performance of our systems. Our platform ingests 200+ TB/day of metrics, logs, and traces from hundreds of services across 80+ Kubernetes clusters, and when a user's checkout fails, our data is how engineers find out why. Over the next year, we’re...


  • Ottawa, ON, Ottawa Census Division, ON; Ontario, Canada Affirm Full-time €181,000 - €241,000 Temporary

    At Affrim, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The Observability team builds the platform every Affrim engineer relies on to understand the behavior and performance of our systems. Our platform ingests 200+ TB/day of...


  • Ottawa, ON, Ottawa Census Division, ON; Ontario, Canada Affirm Full-time €181,000 - €241,000 Temporary

    The Observability team builds the platform every Affrim engineer relies on to understand the behavior and performance of our systems. Our platform ingests 200+ TB/day of metrics, logs, and traces from hundreds of services across 80+ Kubernetes clusters, and when a user's checkout fails, our data is how engineers find out why. Over the next year, we’re...


  • Ottawa, ON, Ottawa Census Division, ON; Ontario, Canada Affirm, Inc. Full-time €153,000 - €213,000 Temporary

    The Capacity Modeling team ensures Aff**irm can safely handle forecasted traffic—especially during peak sales events—by translating demand forecasts into concrete, testable capacity plans. You will be responsible for owning and delivering quarterly goals for your team, leading engineers on your team through ambiguity to solve open-ended problems, and...


  • Ottawa, ON, Ottawa Census Division, ON; Ontario, Canada Affirm, Inc. Full-time €181,000 - €241,000 Temporary

    At Affrim, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The Observability team builds the platform every Affrim engineer relies on to understand the behavior and performance of our systems. Our platform ingests 200+ TB/day of...


  • Ottawa, Ontario, Canada Affirm Full-time

    Affirm’s engineering team is building large-scale, fault-tolerant, global infrastructure shared across multiple financial products, merchants, and vendors. Making this infrastructure transparently available to all engineers is critical to the business. The engineering culture emphasizes blameless postmortems, detailed technical specifications, and...


  • Ottawa, Canada Manulife/John Hancock Full-time €113,000 - €210,000 Contract

    Lead Java and React development for Manulife’s hybrid Canadian Retirement Technology team, shaping secure cloud-native applications and mentoring engineering teams. This lead full stack software engineer provides technical leadership across the software development lifecycle. You will partner with product owners, architects, and engineering teams using...

  • Software Engineer

    3 days ago


    Ottawa, ON, Canada Affirm, Inc. Remote Full-time $70,000 - $95,000 Contract

    The Batch Developer Experience team makes batch development and testing faster and more reliable at affirmAs a developer on this team you will partner with product and infrastructure engineers to build the tools and systems that streamline workflows, strengthen testing and ultimately improve the reliability of affirm’s critical batch workloadsWith the...


  • Ottawa, ON, Ottawa Census Division, ON; Ontario, Canada Platform.sh Full-time

    Upsun seeks a Backend Software Engineer to enhance our billing systems. Focus on backend service development in Go for complex billing integrations and ensure accuracy in customer invoicing. In this role, you will build and maintain the backend services for our billing platform. Your expertise will drive projects that handle revenue across multiple...


  • Ottawa, Ontario, Canada Platform.sh Full-time

    Upsun seeks a Backend Software Engineer to enhance our billing systems. Focus on backend service development in Go for complex billing integrations and ensure accuracy in customer invoicing.In this role, you will build and maintain the backend services for our billing platform. Your expertise will drive projects that handle revenue across multiple currencies...


  • Ottawa, ON, Canada Just Eat Takeaway.com Full-time €102,000 - €128,000 Contract

    Build scalable Java backend services remotely for Just Eat Takeaway.com from Alberta, Manitoba, or Ontario. Apply strong system design expertise. As a Senior Java Developer, you will support the Logistics Areas and Fees team. You will architect, develop, and operate distributed systems for delivery calculations. The work includes Java 21, REST APIs, message...


  • Ottawa, Ontario, Canada Affirm Full-time

    The Consumer Authentication Platform team is looking for a passionate Senior Software Engineer to help build the secure, reliable, and seamless authentication experiences that connect millions of consumers with affirm’s financial productsAuthentication is the front door to affirmOur systems power critical consumer journeys (including sign-up, sign-in,...


  • Ottawa, Ontario, Canada Affirm Full-time

    At affirm, we exist for the moments that matter-giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The Batch Developer Experience team makes batch development and testing faster and more reliable at affirm. As a developer on this team you will partner with product and...


  • Ottawa, Ontario, Canada Affirm Full-time

    At Affim, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. Affirm's engineering team is building a large-scale, highly-available, and global infrastructure that is shared across multiple financial products. Ensuring that our infrastructure...


  • Ottawa, ON, Ottawa Census Division, ON; Ontario, Canada Affirm Full-time

    The Consumer Authentication Platform team is looking for a passionate Senior Software Engineer to help build the secure, reliable, and seamless authentication experiences that connect millions of consumers with affirm’s financial products Our systems power critical consumer journeys (including sign-up, sign-in, account recovery, checkout authentication,...