backend engineer nodejs jobs in Ottawa

Apollo.io is seeking a Senior Software Engineer to join a fast‑growing team building data platform architecture and distributed integrations that scale.You will own backend services, data pipelines, and observability, collaborate with global teams, and bring an AI‑first mindset to coding, debugging, and deployment.The role offers remote and in‑person...

The Partner Merchant Interfaces - Integration team within Decisions Foundations is growing and we are looking for a Software Engineer You will be part of a fast paced team which is responsible for the APIs that Partners and Merchants use to integrate with affirm, and also power some of our top partners like Amazon and Stripe With the support of your team,...

A software company specializing in manufacturing solutions is looking for a Backend Software Developer to design and build cloud-native services and data pipelines that transform data into insights. Ideal candidates are proficient in TypeScript, Python, or Go, with experience in micro-services, REST/GraphQL APIs, and containerization. This role offers...

askpolly, based in Ottawa, is seeking a Senior Software Engineer to design, build, and scale production systems behind its AI-powered insights platform. This full-time role, on a hybrid schedule (4 days in-office), focuses on backend architecture with opportunities for full-stack contributions.You will own complex features from problem definition to...

YO AI Labs is seeking experienced Senior Software Engineers to support an AI training project by creating reinforcement learning environments that evaluate AI models on complex software tasks using MCP tools.You will design reproducible environments, deterministic verification, and reference solutions for tasks like bug fixing, feature development, codebase...

Backend Software Engineer# Backend Software Engineer22 JUN 2026CanadaPermanentTech & ProductVisit SiteApply NowBackend Software Engineer About Covers and Legend Here at Covers, we're a top digital media company in the sports betting industry, with a clear sense of purpose and a belief that success comes from the strength of our team and our culture. We're...

Nexxa is building the best AI systems for heavy industries - enabling machines, systems and operations to think, decide and act autonomously across manufacturing, large-scale infrastructure, logistics and legacy environments.Our mission is to translate deep technical breakthroughs into operational reality, solving some of the hardest systems-level problems...

About Binance. US:Binance. US is a licensed and regulated U.S. cryptocurrency exchange where users can buy, trade, hold, and earn digital assets. Recognized as a top U.S. crypto platform by Forbes (Best Crypto Exchanges of 2026) and Business Insider (Best Crypto Exchanges of 2025), Binance. US leads the industry with its low fees, advanced trading engine,...

Blackpoint Cyber is the leading provider of world-class cybersecurity threat hunting, detection and remediation technology. Founded by former National Security Agency (NSA) cyber operations experts who applied their learnings to bring national security-grade technology solutions to commercial customers around the world, Blackpoint Cyber is in hyper-growth...

OverviewModes is a digital transformation and organizational design collective working with various clients throughout North America. Our focus is on financial services. We help clients plan, design and launch digital human-centred experiences that cater to users\' needs and deliver elegant solutions to challenging problems. We constantly seek top talent to...

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. Auth Experience owns the customer journeys during authentication, verification, and fraud journeys. You’ll work to build the backend orchestration layers that drive our Web...

Warner Bros. Discovery is seeking a Senior Software Engineer to design, deliver, and support Java-based, cloud-native services. You will own features end-to-end, influence technical direction, and raise the bar for code quality, reliability, and operability.This hands-on role requires mentoring, production support, and collaboration across a distributed AWS...

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. Auth Experience owns the customer journeys during authentication, verification, and fraud journeys. You’ll work to build the backend orchestration layers that drive our Web and...

Drive innovation in digital payments with Affirm as a Senior Backend Software Engineer. Engage in building secure authentication experiences that connect millions to vital financial services. Join the consumer Authentication Platform team at Affirm as a Senior Software Engineer. You will lead the technical design of impactful authentication capabilities,...

Advance to a Lead Backend Software Engineer position at League, where your expertise in Go and Kubernetes will be pivotal in driving innovative backend solutions. Collaborate and mentor across teams. As a Lead engineer in the Platform Engineering team, you will tackle some of the most complex problems in backend systems and improve overall architecture....

As a Senior or Staff Software Engineer, Backend on our Platform Engineering team, you bring deep technical expertise to the design and delivery of the foundational services and developer tools that power League’s engineering organization; working inside our pod-based delivery model alongside the teams that build on your services You take ownership of...

Drive innovation in digital payments with Affirm as a Senior Backend Software Engineer. Engage in building secure authentication experiences that connect millions to vital financial services. Join the consumer Authentication Platform team at Affirm as a Senior Software Engineer. You will lead the technical design of impactful authentication capabilities,...

A culture and arts platform is seeking a Mid-Senior Back End Developer in Ottawa to enhance its API for the Amuse platform. Candidates should have experience with Go or equivalent languages, and a knack for data analytics and GIS applications. This fully remote role offers equity, generous vacation, and collaborative team dynamics. Join us to enrich the...

Fellow is hiring an engineer to build and operate distributed media processing systems that power real‑time meeting capabilities. You will handle audio/video ingestion, metadata, and events across diverse environments and platforms.You will work on reliable backend services, observability, and tooling while applying AI‑native approaches to coding,...

A tech company specializing in event-driven architecture is seeking a Senior Software Developer to join their AI team. The role involves leading technical projects, creating robust APIs, and collaborating across functions to enhance product offerings. Candidates should have over 7 years of experience, strong backend development skills particularly in Python...