Top Software Engineer Jobs in Toronto

Build and scale back-end systems and real-time bidirectional EHR integrations; grow data processing and storage from terabytes to petabytes; own end-to-end cross-functional projects; improve core systems and DevOps for 100x growth; partner with product and engineering leadership to set technical direction.

Lead architecture and hands-on implementation of a cloud-native, multi-tenant SASE control plane and orchestration for globally distributed gateways. Design scalable, resilient multi-region systems, define multi-tenancy models and APIs, partner with data-plane teams, establish CI/CD and IaC standards, mentor engineers, and optimize platform cost and operational efficiency.

The Senior Software Developer will develop innovative software solutions, mentor a team, optimize code, and ensure high-quality deliverables within a collaborative environment.

As a Senior Software Engineer at Trader Corporation, you'll modernize systems for fraud detection and risk analysis, drive architectural decisions, and mentor other engineers, impacting the automotive ecosystem across Canada.

The Principal Engineer will design scalable backend services and APIs, optimize performance, and improve developer experience while collaborating with AI/ML experts and legal specialists.

As a Staff Software Engineer, you'll design scalable backend services, oversee architecture decisions, optimize performance, and enhance CI/CD processes while collaborating with teams.

As a Lead Software Engineer, you will design AI-driven backend systems for accounting, integrating LLMs, ensuring performance and security, and collaborating with teams on AI solutions.

Designs, develops, and maintains Oracle Fusion payment integrations with gateways, banks, and third-party systems. Builds solutions using OIC, APIs, FBDI, and ADFDI; customizes Oracle Financials modules; troubleshoots production issues; and performs testing, code reviews, and technical design. Collaborates with product, architecture, and QA teams while ensuring security, compliance, scalability, reconciliation, and audit requirements.

Build and maintain a scalable document-processing platform supporting AI products and customer-facing applications. Design client-facing REST APIs using an API-first approach, develop cloud-native services with C# and .NET, and work with AI/ML and LLM technologies. Provide technical leadership through mentoring, code reviews, and architectural decisions while collaborating with engineers, product managers, scientists, and legal experts. Participate in testing, monitoring, incident management, and on-call rotations.

Design, develop, and maintain scalable full-stack features for SOTI XSight using C#, .NET, TypeScript, and Angular. Drive architecture, integrate analytics/AI, mentor developers, troubleshoot complex issues, and collaborate with stakeholders to deliver high-quality, cloud-ready solutions.

Design, develop, and deploy Java and Spring Boot backend applications using MongoDB. Build and integrate AI agents with Google ADK and apply prompt engineering techniques to large language model solutions. Support feasibility studies, estimation, planning, testing, implementation, security, compliance, and business-user operations. Serve as an application development subject matter expert while managing projects independently and advising senior stakeholders.

Design, develop, test, and productionize scalable AI features for mobile and IoT device management products. Integrate advanced models, optimize performance and reliability, investigate defects, write automated tests, and contribute across the software development lifecycle. Provide technical guidance, architecture expertise, code reviews, and leadership in C# and .NET while collaborating with multidisciplinary product teams.

Develop and enhance robust software solutions, improve software stability, manage technical debt, and collaborate in an agile environment.

We are seeking a product-minded backend engineer to work on our Customer Studio product, focusing on data performance, analytics, audience syncing, and generative AI. The role requires strong architecture, scalability considerations, and product engagement.

The role involves developing tools for enterprises to manage Hightouch deployments, focusing on access control, change management, and data warehouse performance.

The Software Engineer will work on high-throughput streaming systems, scaling infrastructure to manage billions of events, ensuring low-latency and high performance while delivering projects from start to finish with significant ownership.

The role involves rapid prototyping and architecting production LLM pipelines for AI in marketing workflows. Responsibilities include developing proofs of concept, making AI architecture decisions, building production data agents, and understanding user workflows for seamless AI experiences.

Design, build, test, and ship software improving service availability, scalability, latency, and efficiency. Automate operational work, define SLOs, implement observability, troubleshoot production systems across applications, Linux, and networks, lead postmortems, plan capacity and costs, document systems, and participate in shared-infrastructure incident response.

Defines and evolves the long-term technical roadmap, sets architecture and engineering standards, guides AI adoption in development workflows, prioritizes technical debt, strengthens CI/CD and quality practices, leads design reviews, develops senior technical talent, and supports hiring. The role requires strategic leadership alongside hands-on technical execution across scalable SaaS systems.

Build and scale backend systems for Lyft’s Recommendations team, including pipelines and services that use rider context and signals to surface relevant offers. Responsibilities include system design, coding, code reviews, on-call support, project delivery, engineering best practices, mentoring, and promoting AI-assisted development. The role requires Python and Go, cloud platforms, distributed systems, databases, and strong collaboration skills, with bonus experience in ML serving, recommendation systems, feature stores, or experimentation.

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.

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.