Top Software Engineer Jobs in Toronto

Design, build, and operate scalable backend services in Python or Go to power underwriting decisioning. Integrate statistical and ML models, implement APIs (REST, gRPC/GraphQL), ensure observability and testing, lead projects, and collaborate with product, data science, and underwriting teams to automate underwriting workflows.

Drive redesign of the new-customer experience by building features across Python services, a GraphQL gateway, Auth0-based auth, and Terraform-managed GCP infrastructure. Collaborate cross-functionally, ensure reliable, well-tested deployments, and independently drive projects to completion.

Design, implement, and operate visualization software for a dynamic satellite and terrestrial network. Build geospatial and graph-based views, backend services and APIs, data delivery mechanisms, playback and event-reconstruction tools, and tools for tracing, filtering, and investigating network state and incidents. Partner with network and systems engineers to optimize performance, security, observability, and resilience.

Design and deliver full-stack features for AI voice and chat products at enterprise scale. Integrate ASR/TTS and LLM improvements, optimize production systems for latency and cost, participate in on-call rotations, and collaborate with product and ML teams to ship high-impact, scalable solutions.

Lead technical reliability work across platform and product teams: design guardrails, build incident mitigation tooling, run load testing, translate findings into platform-wide reliability improvements, and influence engineering standards and practices.

Build full-stack features for AI voice and chat products using TypeScript, Node.js, React, and Python. Integrate ASR/TTS and LLM improvements, optimize production systems for latency and cost, participate in on-call rotations, and collaborate with ML and product teams to scale enterprise AI conversations.

Build reusable, scalable platform services and core components (entities, relationship systems), maintain search infrastructure and relevance, lead DevOps and IaC (AWS/Terraform), improve developer experience for the Go backend, and mentor/consult across engineering teams to drive platform-wide architectural standards.

You will architect and develop new features for SELECT, focusing on cost management, UI components, data visualization, and improving application performance.

As a Senior Software Engineer, you'll architect and develop cost management features, enhance UI components, create data visualizations, and improve application performance, while taking ownership of features from design to delivery.

Design, build, test, and deploy scalable full-stack web applications using a modern Java-based stack. Develop backend services and APIs, create responsive front-end components, optimize database performance, support CI/CD, participate in code reviews, write automated tests, and mentor junior developers while collaborating with cross-functional teams.

Lead and deliver platform engineering, DevOps, and CI/CD initiatives from design through production. Build and maintain CI/CD pipelines, AWS infrastructure with IaC, Kubernetes/EKS environments, automation scripts, observability, and secure engineering practices. Troubleshoot production issues, participate in on-call rotations, and mentor junior engineers to improve reliability and developer productivity.

Design, develop, and enhance Cority software and client solutions. Lead technical decisions and teams, produce production-ready code, implement CI/CD, perform code reviews, mentor junior developers, collaborate with Product Owners, support and maintain systems, and own functional areas or projects.

Lead frontend design and delivery of AI product experiences using React and TypeScript, mentor engineers, set frontend standards, use AI-assisted tooling, and contribute to backend services in Go and product roadmaps.

Lead architecture and technical strategy across an infrastructure platform ecosystem. Drive hands-on architectural improvements to graph engine and backend services, reduce technical debt, establish standards, champion AI-first engineering practices, run architecture/code reviews and mentorship, and collaborate with product and leadership to ensure scalable, extensible systems.

Design and build a test automation framework from scratch; write and maintain API, integration, and end-to-end UI tests; integrate suites into CI/CD; reduce flakiness; apply and evaluate AI-assisted testing tools; mentor engineers and raise automation quality across squads.

Lead multiple engineering teams owning the internal developer platform, CI/CD, cloud infrastructure, observability and developer tooling. Define technical strategy, remove development friction, improve developer productivity, coach managers, influence architecture, and deliver scalable platform capabilities in a distributed, remote-first organization.

Architect and build TeraWave Point of Presence infrastructure, implement and optimize wire-speed dataplane using DPDK/VPP, tune IP networking stacks (BGP/OSPF), drive performance engineering at the software-hardware interface, mentor engineers, and integrate PoP systems with the broader satellite communications ecosystem.

The role involves designing and implementing scalable backend services using Node.js and AWS, ensuring data integrity through SQL, optimizing system performance, and collaborating effectively with cross-functional teams in an agile environment.

The Senior Software Engineer will architect and develop the Solver network, ensuring performance, collaborating with teams, and leading engineering standards.

Senior technical leader designing, building, and evolving cloud infrastructure, automation, and platform capabilities. Lead DevOps architecture, CI/CD, IaC, Kubernetes/Docker orchestration, cloud migrations (AWS/Azure), security/compliance, observability, and SRE practices while mentoring teams and driving platform modernization and reliability for enterprise SaaS.

The Open Source Engineer will expand LanceDB's integration with big data systems, manage dataset operations, and enhance open-source community efforts.

The Senior Software Engineer will enhance the platform through collaboration, technical leadership, and by developing high-quality frontend components, ensuring best practices and performance.

Lead test strategy and build scalable automated test frameworks for a custom Linux kernel. Validate performance, reliability, and security; develop test suites for kernel enhancements and VM software; debug low-level system issues; enhance CI/build automation; provide technical leadership and mentor junior engineers.

Own and evolve ClickHouse's Python connectors and SDKs; build integrations with orchestration and transformation tools; design AI/LLM connector patterns for RAG, vector search, and feature pipelines; engage with open-source community; collaborate across product and engineering to prioritize and ship production-grade data integrations.

The Senior Software Engineer will develop AI/ML features, build robust APIs, create user-friendly UIs, and integrate AI models into ClickHouse Cloud.