Top Software Engineer Jobs in Toronto

As a Software Engineer, you will resolve complex customer issues related to Ubuntu and open source software, participate in upstream communities, and develop and review code across multiple layers of the software stack.

Join Aleph's engineering team to develop the Core Product, focusing on user-facing features for financial data insights. Collaborate with leadership, design robust software components, and contribute to system architecture in a fast-paced, remote environment.

Design, build, and operate Rust services powering Scribd’s large-scale Content Library and core infrastructure. Own features end to end, evolve Python tooling, optimize DataFusion, Parquet, S3, caching, and PostgreSQL/Aurora systems, and strengthen governance through lineage, authorization, and deletion controls. Lead cross-functional technical projects, support platform users, mentor engineers, improve developer workflows, and maintain production reliability through observability, on-call, and incident response.

Leads architecture and hands-on development of scalable, cloud-native full-stack applications using Java, Spring Boot, GCP, microservices, and big data technologies. Manages cross-functional engineering teams, mentors staff, establishes technical standards, and oversees secure software development, reliability KPIs, documentation, releases, and cloud optimization. Develops APIs, prototypes solutions, supports infrastructure-as-code, and collaborates with product, architecture, SRE, and business stakeholders.

Work on an AI-native Strategic Projects team to turn prototypes (LLM gateways, proxies, sandboxes) into production-grade services. Own hardening, error handling, observability, operational tooling, security review practices, and customer integrations. Use coding agents and LLMs heavily, collaborate with product-minded engineers and reference customers, and ensure prototypes meet production reliability and maintainability standards. Remote role with light travel (<10%).

Lead and grow a team of full‑stack and AI engineers to design, build, and deploy scalable, secure cloud‑based AI systems (NLP, CV, recommendations). Oversee architecture, development, cross‑functional delivery, and foster continuous learning and best practices for production ML/AI.

Lead architecture and implementation across the full stack, rework user and license management, and develop core runtime components for a code-first PCB design product. Drive technical direction, identify and fix technical debt, mentor engineers, perform code reviews, and build production-ready, high-performance systems involving computational geometry and advanced visualization.

Develops tester control and automation software for RAM testing hardware, supports Linux-based AI servers, and contributes to low-level memory stability and other R&D projects. The engineer will use C++, C#, and Python daily, collaborate with international R&D teams across time zones, and learn specialized hardware-testing technology.

Lead design and delivery of reliability projects for Coinbase's platform: secure service configuration and secrets management, improve canary-based deployments, partner with core services to increase scalability and reduce incidents, drive reliability best practices, and participate in on-call rotations.

As a Senior Software Engineer, you will design and build a new lifecycle orchestrator service, mentor engineers, and drive technical strategies while improving engineering standards and processes.

Design and implement high-performance, scalable message-driven applications for Linux edge systems. Participate in planning and design, write testable reliable code, work with messaging protocols, REST/gRPC APIs, and optimize for performance. Collaborate on system-level features and optionally support industrial protocols, virtualization, and system packaging.

Develop and maintain production-quality software for self-driving technology. Collaborate with teams, lead discussions, and mentor engineers.

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.

Develop and maintain applications in Infor CloudSuite Distribution, integrate third-party apps, and design full-stack web applications while collaborating with stakeholders and improving development processes.

Senior full-stack engineer responsible for designing, building, and owning end-to-end features across frontend (TypeScript/React) and backend (JVM languages or Python). Mentor junior engineers, drive best practices (unit testing, CI), deploy generative AI infrastructure, work with databases and cloud/distributed systems, collaborate in cross-functional teams, and contribute to product excellence in a remote, agile environment.

Design, build, and maintain full-stack features across frontend (TypeScript/React) and backend (JVM language or Python). Mentor engineers, participate in code reviews and pair-programming, deploy generative AI infrastructure, and ensure quality via unit testing and CI in an agile, remote environment.

Design, build, and operate Sentry's Streaming Platform, including Kafka, streaming runtime, high-level APIs, and developer abstractions. Implement resilient, high-throughput stream processing with strong correctness guarantees (delivery, checkpointing, watermarking). Automate Kafka fleet management, improve observability and failover, and partner with product engineers to enable reliable, scalable ingestion pipelines.

Design, develop, and maintain scalable full-stack web applications. Collaborate with stakeholders and cross-functional teams to translate requirements into technical solutions, modernize legacy systems, implement APIs and integrations, troubleshoot production issues, participate in architecture and code reviews, and drive CI/CD and DevOps practices to deliver reliable, high-quality enterprise software.

Lead the development of Windows desktop applications, ensuring best practices in performance and accessibility while overseeing the full feature lifecycle from conception to maintenance.

The Senior Software Engineer will develop and optimize foundational services and SDKs, collaborating with product teams to enhance user experience through efficient APIs and systems design.

The Lead Software Developer will lead technical direction for derivatives portfolio management, provide mentorship, and engage in hands-on coding while solving complex technical issues.

The Senior Software Engineer will develop scalable C++ applications, collaborate with teams, manage projects, and provide technical support in a results-driven environment.

The Lead Software Engineer will own project deliveries, analyze business requirements, optimize ABL code, mentor developers, and enforce coding standards.

Lead architecture and implementation of Sentry's Issue Workflow platform, solving performance and scalability challenges, driving technical strategy, building real-time pipelines and search systems, and mentoring engineering teammates to improve product quality and user experience.

The Senior Software Engineer will own development from design to deployment, maintain a Ruby on Rails monolith, and implement web scraping techniques. You'll collaborate with leadership and manage integrations while leveraging AI tools.