Top Software Engineer Jobs in Toronto

The Senior Software Engineer, Backend is responsible for building APIs, ensuring system reliability, scalability, and contributing to company-building initiatives.

Join Docker's IAM team as a Senior Software Engineer to design and operate backend identity services focusing on authentication, authorization, and security for millions of developers. You'll lead projects, mentor teammates, and evolve Docker's identity model in a remote-first global environment.

Build and scale AI data and ML infrastructure: evaluation systems, fine-tuning pipelines, agent-first product surfaces, high-throughput data workflows, and integrations of new models into production.

Design, build, and maintain scalable, performant, and accessible front-end features and dashboards for non-human identity governance. Collaborate with design, product, and backend teams to integrate APIs, optimize data flows, maintain component libraries and design systems, champion accessibility and performance, write well-tested code, and mentor engineers.

Lead architecture and technical direction for the NHI Governance domain, owning complex server-side initiatives to discover, assess, and remediate non-human identities across cloud and on-prem environments. Define standards, interfaces, and contracts; drive quality, security, observability, performance; mentor senior engineers; and partner with product and design to align technical strategy with business goals.

Lead architecture and implementation of scalable, secure cloud-native microservices for non-human identity governance. Design APIs, data pipelines, observability, and IaC; mentor engineers; drive cross-team technical direction, performance, and operational excellence.

Own quality for assigned features and services by designing risk-based test approaches, building automated API/UI/integration tests, integrating tests into CI/CD pipelines, monitoring pipeline health, and collaborating with engineers to improve testability and prevent defects. Apply AI/agent-assisted testing workflows and contribute to test frameworks and tooling.

Lead design and delivery of scalable backend systems powering 3D and computer-vision experiences. Build mission-critical APIs, ETL/data pipelines, and distributed services; mentor senior engineers; drive architecture, observability, resiliency, and cross-team initiatives to ensure performance at global scale.

Lead the Data Identity team's technical direction: own identity data model, architect streaming and batch pipelines, design stable data contracts, lead vendor SBOM ingestion, apply AI/ML where appropriate, improve reliability, cost, and incident response, and collaborate with downstream teams and external vendors.

As a Software Engineer, AI/ML GenAI, you will design and implement AI features, manage embeddings, and optimize AI systems for production deployment while collaborating with product and design teams.

Design, build, and maintain pixel-perfect front-end web applications and shared component libraries. Translate visual designs into functional UIs, ensure cross-browser/platform compatibility, contribute across the project lifecycle, and apply testing and CI practices to deliver high-quality user experiences at scale.

The Senior Software Engineer will lead the technical direction for MAP Policy Partners, focusing on web scraping, Ruby on Rails maintenance, and automation of product development.

Design and build an events-first observability platform: architect high-throughput ingest, storage, and query pipelines; ship SDKs and instrumentation; define standards (OpenTelemetry, SLOs); enable AI-agent investigation and mentor senior engineers while leading cross-team technical initiatives.

Lead technical ownership and hands-on engineering for the integration backbone of a financial SaaS platform. Modernize legacy integration processes into .NET services, design reliable REST and file-based connectors, optimize Oracle SQL/PL/SQL, improve observability, and drive cloud-native Azure patterns. Mentor engineers, enforce standards, and champion AI-first development to increase delivery velocity and operational quality across multiple production ecosystems.

Design and build scalable, high-performance web applications using Next.js, React, Vue.js, and TypeScript. Own end-to-end feature development, create reusable UI components, optimize performance (SSR/SSG, lazy loading, Core Web Vitals), ensure accessibility and security, support CI/CD and deployments, conduct automated testing, mentor junior engineers, and collaborate with Product, Design, Backend, and DevOps to define and deliver front-end architecture and features.

As a Senior Software Engineer, you will design and deliver user-friendly software, manage APIs, and create scalable microservice architectures.

As a Staff Software Engineer, you'll design and deliver a core data platform, focusing on architecture, pipeline components, and AI integration. This hands-on role emphasizes creating production code and establishing technical standards within a small team.

Build and maintain full-stack web applications (PHP/Laravel backend, Vue.js frontend), design architecture, improve reliability via testing and observability, manage databases, optimize systems, collaborate with product and design, and mentor junior engineers.

Design, build, and operate high-performance distributed inference systems that route requests, autoscale compute across accelerators, deploy new models, integrate new hardware, and tune performance for millions of users while enabling research workflows.

Design, build, and automate scalable infrastructure and CI/CD pipelines; ensure production reliability, observability, and performance; use IaC (Terraform), containers (Docker, Kubernetes), and cloud platforms; collaborate with engineering and product teams and communicate technical issues to stakeholders.

Senior Software Security Engineer responsible for threat modeling, security architecture reviews, code and penetration testing, integrating SAST/DAST/SCA into CI/CD, triaging vulnerabilities, driving secure SDLC/DevSecOps practices, incident response, and ensuring compliance with industry security standards.

Design, build, and maintain a customer-facing threat intelligence platform with a backend and data-engineering focus. Collaborate with product and engineering leadership, implement scalable data ingestion and processing systems, optimize platform performance, and participate in agile development practices and release processes.

Work on Firefox security architecture and cryptography stack, implement and maintain WebPKI and security-sensitive web APIs, design and ship web platform security features, debug and improve multi-threaded browser performance and memory, collaborate across teams on security initiatives, and contribute to technical design and planning.

Lead frontend modernization by migrating legacy web apps into a microfrontend ecosystem, ship production-critical React/Next.js code, define reusable platform patterns, and collaborate cross-functionally to ensure performance, developer experience, and long-term maintainability.

The Senior Staff Engineer at Kaseya is responsible for architecting scalable Java applications, optimizing AWS cloud solutions, and providing technical leadership and mentorship while solving complex problems in a collaborative team environment.