Top Software Engineer Jobs in Ottawa

The Senior Back-End Software Engineer designs, develops, and maintains scalable backend systems while taking ownership of the software development lifecycle.

Lead the design and development of operating system components, mentor team members, and ensure high-quality output while following Agile practices.

Design and implement scalable software solutions, lead technical initiatives, mentor junior engineers, and optimize system performance within a collaborative team.

As a Senior Software Engineer at Proto, you will architect and lead development for mining infrastructure, mentor engineers, and drive technical strategy.

Responsible for defining technical direction, mentoring engineers, leading initiatives, and designing products within Square's ecosystem.

The Senior Software Engineer will modernize warehouse technology, improve fulfillment operations, and collaborate with stakeholders to deliver solutions.

Build reusable APIs and UI components for cross-product collaboration features (notifications, comments, ownership, tasks). Lead projects, mentor engineers, participate in on-call, and drive platform architecture.

Develop and launch engaging features for Roblox games, write maintainable Lua code, improve game systems, and collaborate with team members.

Lead the design and implementation of full-stack applications, mentor developers, ensure high-quality software delivery, and manage technical architecture.

Engineer software that connects AI-driven platforms to datacenter power infrastructure. Develop control strategies and optimize energy use and AI workloads.

Develop full stack applications for Bitcoin infrastructure, including designing APIs, web applications, and maintaining databases, in a collaborative environment.

Lead the design and implementation of complex behaviors for humanoid robots, integrating motion planning and new autonomy capabilities, while mentoring junior engineers.

Develop user-facing features and create frontend infrastructure using React.js and TypeScript, collaborating with product designers and backend engineers.

Design and build complex, data-heavy UIs, own features end-to-end, collaborate with teams, support production, and ensure quality.

Develop and contribute to the Mesa 3D Graphics Library and Linux Graphics stack, collaborating with clients and promoting open-source solutions.

Design and build scalable applications for Clario's cloud healthcare platform, influencing architecture, mentoring peers, and ensuring secure solutions in an Agile environment.

Seeking a Fullstack Software Engineer skilled in Node.js and Next.js to develop an AI influencer marketing agent, focusing on scalable systems and API architecture.

Design and implement high-throughput database integrations and replication into ClickHouse. Improve system reliability, debug production issues using observability tools, write documentation, participate in on-call rotation, and collaborate with customers and cross-functional teams to drive product improvements.

Build and operate Kubernetes-based platform automation for provisioning CSP resources, networking, scheduling, and autoscaling. Maintain Crossplane compositions and Terraform modules, collaborate with application teams, participate in on-call rotations, and improve platform performance, reliability, and efficiency at scale.

Design and develop full-stack fintech solutions, build APIs and front-end experiences, work in AI-native workflows, contribute to DevOps/CI-CD and collaborate across product, data, and infrastructure teams.

Design and build scalable .NET/.NET Core applications and integration tools (WPF desktop focus). Apply TDD/BDD and test automation, create reusable libraries, consume/produce varied data feeds, collaborate on cross-functional agile teams, and incorporate AI tools to improve engineering and developer experience.

Contribute to building and operating the Secure Compute platform: implement features, integrate with Apache Kafka and core systems, work with Kubernetes/containers/serverless APIs, and collaborate on large-scale cloud distributed systems.

Design and maintain public blockchain infrastructure: author Solidity smart contracts (ERC-20/721), build finality-aware, event-driven services, integrate HSM-backed mint/burn flows, ensure reconciliation and scalability, and mentor junior engineers.

Develop and maintain full-stack web applications and APIs using TypeScript/Node.js and React/Next.js; optimize performance, collect data, fix bugs, and collaborate with stakeholders.

Contribute across the full SDLC on merchant- and partner-facing web portals using PHP, C#, and modern JavaScript frameworks. Build front- and back-end features, write tests, optimize MySQL queries, participate in design and code reviews, and collaborate with product, QA, and SRE to deliver secure, reliable portal experiences.