Top Software Engineer Jobs in Toronto

The Senior Software Engineer will lead design, development, and deployment of software solutions using .NET, mentor team members, and optimize TSQL queries. They will analyze legacy systems, collaborate with cross-functional teams, and ensure project delivery and quality standards are met.

Lead the Growth engineering team by managing experiments, coding, and optimizing acquisition funnels while mentoring engineers. Drive initiatives for customer acquisition through improved checkout processes.

As a Senior Software Development Engineer in Test, you will design automated test frameworks, execute tests for payment workflows, and ensure high-quality integration with ERP systems.

The role focuses on enhancing Pantheon's core software for deploying code and improving integration with version control systems, while ensuring stability and performance.

The Senior Software Engineer will design, build, and maintain scalable software solutions, collaborating with cross-functional teams to improve public transit services using modern technologies.

The Senior Software Engineer (Go) will develop a cybersecurity endpoint agent, focusing on cloud microservices, mentoring, and delivering quality solutions in a fast-paced environment.

The Staff Software Engineer will design and build internal tools, enhance operational efficiency, integrate systems, and ensure data security while collaborating across teams.

Lead the design and development of scalable data acquisition systems, architect core components, and mentor engineers while collaborating across teams to fulfill data integration needs.

Design and develop scalable backend services and APIs for an AI-powered platform, focusing on system architecture and mentoring junior engineers.

The Staff Software Engineer will lead the design and delivery of AI-driven backend systems, influencing technical strategy, driving cross-team initiatives, and mentoring engineers.

The Sr. Software Engineer will develop AI compiler technologies, optimizing models for Tenstorrent hardware, and engage in collaborative problem-solving with a focus on open-source contributions.

As a Senior Full Stack Software Engineer, you will lead the design, development, and integration of AI-driven hiring systems, focusing on scalable workflows and end-to-end projects using React and Ruby on Rails.

The role involves designing, developing, and maintaining software systems for a search platform, utilizing AI and cloud technologies. Responsibilities include managing production systems, mentoring junior engineers, and participating in operational tasks with a focus on reliability and security.

Lead technical projects for product scaling. Design and maintain APIs and services, ensuring reliability and user experience while collaborating with product teams.

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

As a Senior Software Engineer at BitGo, you'll design and develop scalable APIs for cryptocurrencies, mentor peers, and collaborate in feature development and problem-solving.

Optimize and integrate LLMs across the stack from GPU kernels to Kubernetes deployments. Improve inference performance via kernel development, algorithmic techniques (quantization, speculative decoding), and contributions to open-source LLM engines like vLLM. Drive hardware utilization, profiling, and enterprise-grade scalable implementations.

Design, build, and secure scalable distributed backend systems for AI workloads. Implement microservice-based architectures, manage Kubernetes-based deployments, apply IaC and DevOps practices, and collaborate with performance and solutions engineering to optimize model deployment and infrastructure cost, security, and scalability.

Build and own fullstack features across UI, backend APIs, and orchestration interfaces for a global GPU inference platform. Implement real-time streaming, analytics, deployment workflows, developer SDKs/CLI, and observability integrations while collaborating with founders and infrastructure teams to turn distributed systems into user-friendly products.

Develop core backend components for a blockchain network, focusing on reliability and scalability, mainly using Rust. Ensure code quality through testing and debugging.

Design, build, and operate large-scale distributed batch and streaming data systems on AWS. Develop production-grade services, data pipelines (Spark/Hadoop/Airflow), microservices, IaC/CI-CD, and tooling; mentor peers and troubleshoot complex production issues to ensure reliability, scalability, and observability of Cloud Analytics platform.

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.

Design, implement, and deploy platform features and services (APIs, backend, integrations) using Kotlin/Python. Work with microservices, relational and non-relational data stores, monitoring, and live environment incident response. Collaborate with cross-functional teams, advocate engineering best practices, and mentor junior engineers.

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 in Localization, you'll develop and maintain web applications using Python and JavaScript, focusing on localization projects for Mozilla products while collaborating with engineers and the global community.