Top Software Engineer Jobs in Toronto

Design, build, and maintain scalable data pipelines and tenant-aware APIs to ingest and transform data from ad platforms, order systems, and real-time events. Ensure reliability, observability, and maintainability across event-driven and batch architectures, implement authentication flows, optimize data workflows in a cloud-native environment, and collaborate with product, infrastructure, and data teams to onboard new sources.

Design, build, and ship iOS and/or Android pet product features using AI-native workflows. Collaborate with cloud, design, and product teams, integrate event-driven data, ensure observability and quality, and contribute to CI/CD and engineering standards.

As a Senior Software Engineer, you will design trade settlement infrastructure for crypto trading, focusing on APIs, financial integrity, and mentorship.

Lead design and delivery of enterprise-scale AI systems (including RAG and multi-agent architectures), drive AI strategy and POCs, embed solutions with business units, mentor engineers, establish MLOps/LLMOps practices, and scale prototypes into production.

Design and build full‑stack, agent‑first web applications and scalable cloud-native APIs; partner with AI Engineers to integrate models and data flows; lead architecture, mentor engineers, rapidly prototype AI interaction models, and drive cross-functional delivery.

The Lead Inference Platform Engineer optimizes AI models for performance, deploys workloads across cloud platforms, and collaborates on model integration and infrastructure scaling.

Build foundational agent infrastructure for LLM-driven developer assistant: orchestration, tool execution, context management, evaluation, and trust/permissions. Ship reliable, observable backend systems, own core infra, participate in on-call, and mentor peers while launching agentic features to customers.

Design, build, ship, and own end-to-end product features across frontend, backend, and data. Translate ambiguous product requirements into reliable, well-tested systems; deploy, monitor, and maintain production services; participate in design and architecture, code reviews, and mentor peers while working closely with product and design teams.

Lead design and delivery of self-service platform capabilities: provisioning, deployment, observability, and multi-region networking. Drive RFCs and cross-team alignment, build APIs (primarily in Go), implement Terraform/GitOps flows, improve EKS reliability and Grafana-based SLOs, and reduce operational toil via safe, auditable automation. Own on-call rotation and platform adoption outcomes.

As a Senior Software Engineer at Ayama, you will build and improve AI-based systems, design data pipelines, and develop full-stack product features. This role requires strong architectural judgment and hands-on experience with optimization problems and large-scale data processing.

The Staff Software Engineer will design, build, and maintain compliance systems for fraud prevention, managing KYC workflows and regulatory reporting. They will mentor engineers and drive technical strategy while collaborating with various stakeholders.

Build and scale core research infrastructure and agentic systems across backend, frontend, and model integrations. Own reliability, observability, and performance; ship research-proven features to production rapidly and develop shared tools and SDKs to accelerate Research, QA, and Engineering.

As a Staff Software Engineer at Arc, you will lead the design and development of a new AI-native banking platform, focusing on reliability and scalable systems for cash management and treasury solutions, while influencing product direction and mentoring team members.

As a Senior Software Engineer at Qualified, you will enhance products using AI technologies, deliver exceptional user experiences, and own end-to-end feature delivery while mentoring others.

As a Senior Software Engineer at Qualified, you will develop and maintain high-performance backend systems, mentor other developers, and ensure robust and secure operations, while driving engineering excellence and enhancing system performance.

Develop high-quality software products, maintain unit tests, ensure code security, mentor junior engineers, participate in agile methodologies, and collaborate with customers and stakeholders.

As a Senior Software Engineer, you will build and operate Upbound Spaces, resolve issues in SaaS environments, develop features, support project lifecycles, manage Kubernetes services, and enhance operational tools.

As a Staff Software Engineer AI-Native, you will build and evolve AI-native engineering workflows, design high-quality APIs, and collaborate with international teams to deliver reliable services while mentoring others.

The Senior Software Engineer will develop solutions, mentor junior developers, collaborate with teams, and design user experiences for Supercast's platform, managing project success criteria.

As a Senior Software Engineer, you will lead full stack development of AI-driven features, ensuring best practices in security and scalability while mentoring engineers and collaborating cross-functionally.

The role involves building and optimizing big data pipelines, designing data architectures, collaborating with data scientists, and driving technical strategy for data processing infrastructure.

The Senior Software Developer at SOTI is responsible for developing innovative solutions, mentoring team members, writing scalable code, and supporting full development lifecycle.

The Senior Software Engineer will architect and deliver a CRM and data platform, automate workflows, and integrate data across systems to support growth in the firm.

The AI Solution Engineer will design and implement AI solutions, develop workflows, collaborate with teams, and maintain AI systems to enhance decision-making and automation.

The Staff Engineer role involves architectural leadership combined with hands-on coding for enterprise SaaS applications, mentoring engineers, and driving technical decisions across projects.