Top Software Engineer Jobs in Toronto

Lead technical strategy and roadmap for Affirm's Online Storage platform. Design and build scalable, multi-region datastore solutions, automation control planes, and operational tooling for hundreds of databases. Drive cross-team collaboration, reliability, monitoring, and mentor engineers while delivering high-impact backend and database features.

Design and build high-quality margin and collateral software solutions across the full development lifecycle. Collaborate with product and users, implement RESTful APIs, apply TDD and clean-code practices, and work in a fast-paced, global engineering environment using Java/React/Python and SQL.

Design and maintain scalable test automation frameworks (E2E, integration, load), embed tests into CI/CD, balance automated and manual testing, improve system resilience, use security and accessibility tooling, mentor engineers, and drive quality strategy across the platform.

Join the Integrations team to design, build, test, deploy, and refine integrations and internal tools that connect IXL to school district ecosystems. Work with product managers and partners to implement data exchange standards, prototype solutions, and improve development processes in an agile environment.

Build and maintain backend services, infrastructure, and data systems for Robinhood Wallet. Design scalable, secure architectures and implement product-facing features for cryptocurrency and tokenized trading. Improve system performance, engineering productivity, and risk reduction while collaborating with client teams, product, design, and external vendors.

Design and implement high-performance LLM inference systems and runtime optimizations (vLLM), profile and optimize GPU kernels, benchmark inference performance, integrate research into production-grade open-source software, and collaborate across teams to improve serving efficiency using CUDA, PyTorch, and profiling tools.

Design, develop, and deliver features for a patient engagement and eReferral platform. Work across a three-week Agile sprint cycle on solution design, implementation, code review, testing, and delivery. Collaborate with product managers and developers, contribute to technical decisions, and share knowledge via learning days to improve platform scalability, reliability, and maintainability.

Design, build, test, deploy, and operate cloud-native, microservices-based software. Implement RESTful APIs, IaC, CI/CD, containers/serverless, and database solutions. Monitor and troubleshoot production systems, apply security best practices, and collaborate with global teams to translate requirements into scalable, reliable solutions.

Design, build, and maintain cross-platform mobile apps using React Native and JavaScript. Implement reusable components, integrate RESTful APIs and WebSockets, write unit and integration tests, debug and optimize performance, and collaborate with product, design, and backend teams using Git.

Design and build cross-platform mobile applications using React Native and JavaScript. Implement reusable components, integrate RESTful APIs and WebSockets, write unit and integration tests, debug issues, and collaborate with product, design, and backend teams using Git.

Build intuitive interfaces for construction workflows using React and TypeScript, optimizing performance and creating data-rich dashboards.

The Intermediate Software Engineer will develop educational technology products, collaborating with teams and maintaining high-quality standards through the software development lifecycle.

The Software Engineer will design and implement systems across the stack, focusing on AI-native engineering principles, distributed systems, and high-performance data processing.

Develop and maintain enterprise software applications, focusing on back-end development, API development, and ensuring application security while contributing to software improvement processes.

Design and implement low-level embedded software for x86/ARM platforms in C/C++; collaborate with hardware and software teams to spec, test, and debug vehicle subsystems and sensors (camera, radar, lidar, IMU); work on network devices and time synchronization; perform hands-on hardware bring-up and on-vehicle debugging of buses like I2C, CAN, SPI, UART; ensure reliability and safety for autonomous trucking systems.

Design and build an AI assistant and proprietary AI systems for residential property management. Own end-to-end development from ideation to production, maintain high code quality, ship product features, and lead cross-functional engineering efforts.

Build and maintain end-to-end product features across the stack (AWS, Python, Postgres, React, HTML/CSS). Collaborate with product and design, participate in design meetings, automate processes, advocate best practices, and deliver modular, reliable, and extensible solutions.

As a Staff Frontend Engineer, you will design and implement complex frontend applications, manage architectural decisions, enhance code quality, and collaborate with teams to improve user experience.

Design, implement, and optimize low-level compute kernels for parallel ML workloads. Write high-performance C/C++ code, tune instruction-level latency, memory, and bandwidth, profile and debug a low-level software stack, and collaborate with ML and hardware engineers to integrate optimizations into production ML pipelines.

Build full‑stack Pinner‑facing features, lead product development from ideation through release, partner with design/product/backend teams, prototype and run A/B tests, employ automated testing, and architect scalable solutions used by millions.

As a Staff Software Engineer, you'll lead a team in developing and delivering scalable software solutions for employee management in the restaurant industry, focusing on enhancing customer and employee experiences.

As a Senior Software Engineer, you will lead backend development, design scalable services, and mentor team members while focusing on AI-driven product enhancements.

As an AI Engineer, you'll design and deliver agentic systems that integrate Large Language Models to enhance business workflows and operational efficiency, providing hands-on technical leadership and creating enterprise-grade AI solutions.

Build and own the integration layer connecting Perceptyx to third-party HR and downstream systems. Architect, implement, and operate ingestion pipelines, customer-facing APIs, and configuration portals. Ensure data correctness, idempotency, schema resilience, and observability. Drive AI-assisted development adoption, coach engineers, and collaborate with Product and vendors to deliver scalable, reliable integrations.

Build and maintain a custom WordPress block theme and design system, shipping pages and reusable components from Figma. Develop custom Gutenberg blocks, plugins, APIs, content importers, experimentation, analytics pipelines, and QA automation. Optimize for performance and SEO, implement tracking and A/B tests, and collaborate closely with Design, Marketing, SEO, and Growth.