Top Software Engineer Jobs in Toronto

The Senior Software Developer will design, build, and maintain high-quality code for front-end and back-end services while optimizing system performance and mentoring team members.

As a Senior Software Engineer, Full Stack, you will build backend services and APIs for a document analysis platform, focusing on server-side architecture and data processing, while also contributing to frontend features as needed.

The Staff Software Engineer will design and implement features for iOS/macOS, mentor engineers, drive collaboration, and improve software quality and security within Okta's Device Authenticators team.

Design, build, and operate scalable search and streaming services on AWS. Own components end-to-end, improve performance and resiliency, troubleshoot production incidents, contribute to architecture, mentor engineers, and drive automation including AI-assisted development tools.

Design, document, and implement features and APIs for an embedded software update platform. Support integration, debug defects, optimize CPU/RAM/disk usage, collaborate with cross-functional teams, and participate in prototypes and proof-of-concept initiatives for vehicle ECG/Phoenix modules.

Design, build and maintain full-stack frontend and backend systems for real-time content analytics. Develop Python/Flask/GraphQL APIs and React/D3 web experiences, integrate with GCP/BigQuery, improve performance, observability (OpenTelemetry), CI/CD, automated testing, and mentor engineers while collaborating in Agile product teams.

Build and maintain internal security tooling, automation, and cloud-native services to improve secure software delivery, secrets and identity management, vulnerability detection, and runtime protection. Partner with Platform, Infrastructure, and Product teams to integrate security into CI/CD, Kubernetes, and AI-enabled workflows and support incident response and remediation.

Develop and analyze product software safety requirements for LEO and lunar systems, perform hazard and criticality analyses, review safety-critical code and reused software, coordinate with design and systems teams, contribute to system safety reports, present at safety review panels, and defend safety decisions to customers.

Lead design and delivery of LLM-powered agent and retrieval systems: build backend retrieval pipelines, orchestration and evaluation frameworks, optimize ranking and latency, integrate vector DBs and cloud infrastructure, collaborate with product and data teams, and drive production readiness for search and agentic workflows.

Design, develop, and productionize AI/ML features and infrastructure. Implement and optimize models, build APIs and microservices, monitor and tune performance, mentor engineers, and support full lifecycle deployment and A/B testing.

Join the e-Business Application Operations Support team to improve reliability of Java-based digital systems. Lead incident response, implement monitoring and automation, manage releases and capacity, participate in on-call rotation, and collaborate across engineering, security, and operations to reduce MTTR and ensure scalable, secure, fault-tolerant services.

As a Senior Backend Software Engineer, you will lead on architectural decisions, develop backend services and APIs, and handle scalable architecture for millions of users.

Build and ship full‑stack product features for a browser-based CAD application: own front-end architecture and UX, maintain backend services (APIs, Postgres on GCP), write well-tested high-performance code (including C++ core), and lead customer-facing technical engagements to turn feedback into product improvements.

As a Software Engineer, you will collaborate in small teams, transform legacy systems, apply modern engineering practices, and continuously learn and grow.

Develop and optimize distributed systems for syncing customer data, focus on scalability, reliability, and performance for global clients.

Lead development and maintenance of infrastructure tooling and services for core backend systems, champion SRE best practices, design cross-cutting reliability initiatives, guide teams on robust system design, and perform security reviews for new projects and technologies.

Design, implement, and maintain web-based backend components; propose high-level designs; ensure interoperability, performance and code quality; mentor junior developers; lead code reviews; document products; track billable hours in NetSuite and support project delivery.

Lead design and delivery of large-scale backend platform services for AI-driven workflows. Drive architecture, cross-team initiatives, reliability, observability, and operational excellence. Mentor engineers and raise engineering standards to improve developer productivity, performance, resilience, and cost efficiency across the platform.

Build and operate scalable backend services and APIs for an AI-powered developer platform. Own architecture, end-to-end delivery, performance tuning, observability, and mentoring of engineers while collaborating with product and cross-functional teams.

Design, build, and maintain backend systems and microservices using C#/.NET (NET 8+). Develop RESTful APIs, data access layers, and Azure-deployed services. Implement containerization (Docker/Kubernetes), CI/CD, automated tests, and follow SDLC and Agile practices while participating in code reviews.

Hands-on technical leader building and operating client-facing invoicing features in Clio Manage. Own full lifecycle from design to monitoring, collaborate across payments, accounting, and reporting teams, review code, mentor others, and work in an agile, cross-functional environment.

Lead technical design and delivery of scalable, secure microservices. Drive engineering standards, code reviews, architecture decisions, cross-functional collaboration, and introduce tools/process improvements.

Join as an SDET to design and manage automated test suites, create and maintain test cases and plans, write unit and API tests, track and verify defects, debug complex systems, and integrate testing into CI/CD pipelines while collaborating with engineering and DevOps.

Design, build, test and maintain scalable Java/Spring Boot services. Collaborate with product and teams to define requirements, write clean code, implement RESTful APIs, use TDD, automate tasks, monitor performance, debug, review code, and ensure systems remain up-to-date and production-ready.

Design and deliver scalable backend services for Veeva Ostro's SaaS platform. Architect high-performance APIs, optimize application and database performance, collaborate cross-functionally to ship features, champion code quality and testing, evaluate backend technologies, and troubleshoot live system issues to maximize uptime.