Top Software Engineer Jobs in Toronto

Build and improve scalable full-stack products for higher education, owning initiatives across the software development lifecycle from discovery through release. Collaborate with Product, Design, and Engineering in a cross-functional Scrum team, experiment with AI technologies, resolve bugs, complete tickets, and deliver reliable, tested, user-focused features.

Design and build Samsara’s cloud governance platform, including IAM guardrails, security controls, compliance automation, and software supply-chain security tooling across AWS and GCP. Develop reliable distributed systems, secure CI/CD patterns, and SAST/DAST capabilities. Contribute to technical roadmaps, collaborate across infrastructure, security, compliance, and engineering teams, and communicate design tradeoffs while mentoring teammates through reviews and pairing.

Build and maintain Python-based, cloud-native data pipelines and file delivery systems on AWS. Design scalable delivery for CSV/Parquet/JSON via S3, SFTP, and data marketplaces. Implement data quality, monitoring, CI/CD, and migrate legacy feeds to cloud architecture. Contribute to web-based monitoring/configuration, documentation, reviews, and production support.

Build and maintain full-stack web applications using Vue.js/Nuxt 3, TypeScript, Node.js, and AWS. Implement SSR, reusable components, Node APIs and integrations with headless CMS and third-party platforms. Contribute to AI-enabled marketing workflows, performance, accessibility, SEO, testing, monitoring, and troubleshoot across browsers, APIs, CMS, and cloud infrastructure. Participate in code reviews, documentation, and cross-functional planning.

Lead architecture and technical direction for scalable SaaS platform capabilities, including APIs, distributed services, data flows, and AI-enabled features. Establish responsible AI and agentic engineering practices, evaluation and guardrail systems, production-readiness standards, secure-by-design controls, testing, CI/CD, observability, and reliability practices. Drive complex cross-functional initiatives, mentor engineers, conduct architecture and code reviews, and shape technical roadmaps and engineering standards.

Lead development of secure, scalable digital banking software across front-end and backend systems. Design Angular or React applications, build APIs, optimize SQL performance, integrate third-party platforms, improve code quality, implement testing strategies, and mentor engineers. Collaborate with cross-functional teams in an Agile environment while supporting cloud-native practices, regulatory compliance, and continuous product improvement.

Lead development of CoLab's simulation review capabilities: ingest and process industry-standard simulation data, build high-performance visualization for large datasets, collaborate with Product and customers, and define architecture and UX for a new Simulation product area.

This role focuses on Microservice Architecture and data management strategies for generating pricing requests and optimizing data storage in a fintech context.

The Software Engineer will design and build secure and scalable backend services, APIs, and integrations, collaborating with cross-functional teams to deliver impactful solutions.

Design and implement RDMA/InfiniBand networking primitives for distributed GPU inference, optimize communication for Disaggregated KV Cache and WideEP, enable sub-10s model startup, validate hardware performance on H100/H200/B200/B300/GB300 clusters, build observability tools, and optimize or author communication kernels (NCCL/NVSHMEM/UCX).

As a Software Engineer, you'll build and maintain Baseten's core product, design APIs, implement features, fix issues, and collaborate with teams.

Develop and maintain components for machine learning inference platform. Focus on Kubernetes deployments, resource management, and performance monitoring.

The Full Stack Software Engineer will develop and deliver ML-powered applications, working with cloud services, APIs, and modern front-end frameworks while actively participating in technical design and collaboration within a project pod.

Develop and optimize low-level infrastructure software that interfaces with Tenstorrent hardware. Build libraries and APIs for inter-node communication and synchronization, improve performance and scalability in distributed environments, support hardware bring-up, testing, deployment, and integrate components with runtimes and programming models.

Build and maintain full-stack healthcare software that supports clinicians and improves patient care. Collaborate with operators, clinicians, product managers, and users to understand business needs, shape solutions, and deliver features. Responsibilities include making technical and product decisions, developing scalable distributed systems, writing tests, documenting implementations, adopting AI agents, and improving development practices.

Build and maintain robotics data pipelines, curate and version large-scale sensor datasets, configure ML training workflows, optimize cloud costs, and develop tools for perception engineers. Responsibilities include dataset management, experiment reproducibility, automated evaluation, and metrics for dataset health, model performance, and pipeline reliability.

Develop and support scalable Salesforce applications using Apex, Lightning Web Components, Flow, integrations, and CI/CD. Build and test Agentforce AI agents using Data Cloud, prompt templates, custom actions, and Einstein Trust Layer standards. Provide platform support, troubleshooting, release coordination, documentation, monitoring, and continuous improvement while partnering with stakeholders on guest and employee experience solutions.

Maintain and improve Firefox Graphics code covering rendering, compositing, images, canvas, and WebGL. Diagnose and fix cross-platform graphics issues, resolve bugs and regressions, maintain tests, review code, and manage incoming issues. The role requires strong C++ or Rust skills, graphics framework and GPU architecture knowledge, multithreaded debugging and optimization ability, and independent technical leadership in a mature codebase.

Maintains and improves Firefox’s Layout code across CSS, page layout, APZ, text, and images. Responsibilities include fixing bugs and regressions, keeping tests green, diagnosing cross-platform issues, conducting code reviews, handling routine upkeep, and participating in planning and web-compatibility meetings. The role requires independent technical leadership in a large, mature, multithreaded C++ codebase.

Architect and develop scalable, multi-tenant cloud-native networking and security solutions across public, private, and hybrid clouds. Build high-performance traffic management, security policy orchestration, telemetry, threat detection, observability, and cost-optimization systems. Develop production software in Go and PHP, optimize data-plane performance, integrate NGFW and SASE technologies, and guide teams through architecture and delivery.

Lead design and delivery of cost-visibility and optimization tooling across cloud and AI infrastructure. Set technical strategy, build automation and monitoring, collaborate cross-functionally, ensure operational readiness, and mentor engineers to scale FinOps capabilities and self-service cost systems.

Build and deploy internal AI tooling, agents, integrations, and workflows that improve productivity across engineering, research, and business teams. Evaluate emerging AI tools and models, develop observability and responsible-use guardrails, and partner with stakeholders to prototype and scale solutions. Drive adoption through documentation, enablement, and hands-on support while integrating AI into autonomy, simulation, ML training, and business workflows.

Join a talented engineering team to build products at the intersection of AI and finance, focusing on the Fiscal.ai Terminal and financial data APIs.

The Full Stack Intermediate Software Developer will work on critical platform projects, focusing on product development, solution architecture, and coding best practices while collaborating with the team and ensuring application security.

Lead backend-focused software architecture and development for data-intensive products, including experimentation platforms, near-real-time ingestion, AI workflows, integrations, APIs, and distributed systems. Partner with product, design, and data science teams to translate ambiguous needs into scalable production solutions. Contribute across frontend, pipelines, and infrastructure, while mentoring engineers, conducting design reviews, and setting technical direction.