Top Software Engineer Jobs in Toronto

Lead architecture and implementation of AI-first backend and orchestration systems for Audit Suite. Drive scalable, reliable AI workflows (LLM integration, retrieval, vector stores), mentor engineers, set technical direction, and collaborate across product, design, and ML to deliver auditable, high-throughput document-centric solutions.

Lead and mentor engineering teams to design, architect, and deliver scalable, maintainable software. Drive cross-team initiatives, partner with Product and Design, participate in code reviews, promote engineering best practices, and spend time on Staff Dev Projects to reduce technical debt and explore emerging technologies.

Hands-on senior backend engineer role building and maintaining Python/Django services. Design, implement, test, deploy, and support backend features, optimize performance, debug across systems, work with large datasets, REST APIs, background jobs, and PostgreSQL. Collaborate with Product and Engineering and own features end-to-end.

Build and launch user-facing Desktop and Mobile Web features using React/Redux. Own projects end-to-end from prototyping and A/B testing to architecture, scaling, and automated testing. Collaborate with product, design, and backend teams, mentor engineers, lead code reviews, and apply AI thoughtfully to accelerate workflows while validating outputs and protecting sensitive data.

The Senior Software Engineer will develop software by writing clean, efficient code, automate tasks, and collaborate with teams to enhance products, emphasizing TDD and API development.

The Senior Software Engineer will develop and maintain software solutions, write efficient code, perform testing, and collaborate with teams to enhance product performance.

Design, develop, and maintain embedded Linux and RTOS-based firmware for video routing and IP switching products. Collaborate on hardware/software interfaces, perform board-level integration and troubleshooting, and implement timing-critical real-time components.

Design and build end-to-end features using Python and C++; architect scalable distributed systems and performant SQL schemas; implement Docker and Kubernetes workflows on AWS; design data environments and optimize queries; integrate AI agentic tools to automate development; collaborate with cloud infrastructure to maintain resilient, cloud-native applications.

The role involves collaboration with teams to develop solutions, maintain quality standards, and provide technical support, focusing on full-stack development using a variety of technologies.

Design and build backend services for complex enterprise workflows, own data models and service reliability, improve scalability and observability, partner with Product, participate in design/code reviews, and mentor peers.

Lead frontend technical strategy and deliver high-impact web, iOS, and Android features using React and TypeScript. Drive cross-team initiatives, modernize web code and design systems, build tooling (codemods, AI agent skills), ensure operational reliability (monitoring, on-call, playbooks), and mentor engineers while collaborating with product, design, and analytics.

Design, develop, and deploy enterprise-scale financial technology applications using Java, Spring, Kafka, Angular, and React.js. Build AI-enabled features, manage MongoDB and Oracle data stores, write tested and maintainable code, and contribute to Agile and DevOps practices with Kubernetes. Collaborate with front-office teams, mentor engineers, conduct code reviews, and provide technical guidance to stakeholders.

Design, build, and maintain scalable, fault-tolerant backend services and data pipelines for an AI-driven cybersecurity platform. Implement secure APIs, optimize performance across distributed systems, establish backend best practices and CI/CD, write well-tested Python code, and mentor junior engineers.

The role involves building platforms and core systems for identity services at Keycard, focusing on developing distributed systems and CI/CD automation while creating a best-in-class developer experience.

Design and build operational data systems, including pipelines, storage layers, and APIs for near real-time enforcement and insights, balancing streaming and batch paradigms.

Design and build core identity, authentication, and authorization systems for Keycard, focusing on security and multi-tenancy across dynamic, distributed environments.

Lead the technical direction and implementation of scalable streaming and data pipeline infrastructure. Design reliable, observable distributed systems, research architectural technologies, guide cross-functional initiatives, improve platform operations, and mentor engineers across the organization. Collaborate with product and engineering stakeholders to support event streaming, messaging, analytics, and Auth0 platform scalability.

Serve as the technical leader for Auth0’s Developer Platform. Own platform architecture, design scalable distributed and event-driven systems, establish reliability and consistency guarantees, and turn ambiguous challenges into executable technical direction. Raise engineering standards through reviews and mentorship, shape developer- and agent-facing interfaces, and align architectural decisions across teams. The role requires deep IAM, backend platform, Node.js, and high-scale systems expertise, with familiarity in agentic tooling, MCP, or LLM-facing design.

Lead the architecture, development, and scaling of Java and Spring backend services for Okta’s device identity and access platform. Own features from design through deployment, establish engineering standards, guide architectural decisions, improve testing and CI/CD, and mentor senior and staff engineers. Collaborate with product and engineering leadership on technical roadmaps, advance security and identity capabilities, document solutions, and promote AI-assisted development while maintaining high security and quality standards.

The Software Engineer will design and build systems for sharded PostgreSQL, collaborate with a team to solve distributed systems challenges, and directly engage with customers to create technical solutions.

As a Software Engineer on the Insights team, you'll develop observability products and enhance database performance monitoring for clients using Vitess, MySQL, and PostgreSQL.

Join Megaport as a Senior Frontend Software Engineer to develop high-quality web applications, improve systems, and enhance user experiences for both customers and internal users. Collaborate with teams to build responsive and scalable solutions utilizing modern frontend technologies and practices.

As a Senior Full-Stack Software Engineer, you will design, build, and ship AI-powered systems to optimize workflows in the single family rental market, focusing on backend services and full-stack development in a fast-paced environment.

Build and ship end-to-end features and agentic automations for North, Cohere's AI workspace for finance. Integrate financial data sources, enforce data isolation and RBAC, collaborate with Product/UX/ML/Sales, work with finance customers, ensure reliability/security/auditability, and iterate on platform capabilities using AI where appropriate.

Build and maintain North's Agents & Automations platform: design and ship frontend and backend features, execution engine, integrations, debugging, observability, evaluation, and feedback systems to enable reliable AI-powered workflows.