Top Software Engineer Jobs in Toronto

Design and maintain complex software applications, lead architectural decisions, collaborate with teams, and ensure code quality through reviews and clean coding practices.

The Senior Software Engineer will modernize the platform for fraud detection, drive architectural decisions, and improve code quality, operating within a cross-functional agile team.

The role involves developing low-level embedded software for vehicle control, integrating sensors, collaborating with various teams, and ensuring safety standards are met while mentoring junior developers.

Design and lead architecture for real-time screening, detection, and investigation systems to enforce sanctions and AML rules. Build high-throughput, low-latency APIs and distributed pipelines, enable multi-tenant risk-as-a-service, integrate ML/LLM tooling for reviewer augmentation, drive cross-functional alignment, mentor engineers, and ensure operational reliability including on-call ownership.

Lead transaction reconciliation efforts, develop scalable ledger infrastructure, implement payment flows, and own backend platform projects end-to-end.

As a Senior Backend Engineer, you'll design scalable backend systems, build foundational architecture, and manage complex projects within a voice AI-driven platform.

As a Senior Full-Stack Engineer at Retell AI, you'll develop scalable systems and intuitive interfaces, bridging backend integrations with frontend experiences, focusing on voice automation solutions.

As a Staff Software Engineer at Arc, you will lead the design and development of a new AI-native banking platform, focusing on reliability and scalable systems for cash management and treasury solutions, while influencing product direction and mentoring team members.

Build high-performance, scalable simulation infrastructure and tooling for autonomous vehicle development. Design systems for scenario generation, simulation execution, synthetic data, and reinforcement-learning workflows. Collaborate with ML, perception, and controls teams to improve realism, performance, and validation pipelines while writing production-quality C++ and Python code, contributing to architecture, testing, and documentation.

The Staff Software Engineer will design and implement core platform development, improve system foundations, and lead technical initiatives to enhance AI automation deployment across organizations.

The Senior Software Engineer will lead application development projects, enhance user-facing applications, and implement best software practices while collaborating on product direction.

As a Senior Software Developer, collaborate with teams to build scalable systems that improve healthcare outcomes, maintaining quality and fast iteration in development practices.

The role involves developing and testing software stacks for networking devices, including embedded firmware and device drivers, for automotive applications.

Develop and enhance features for EnrollWise, contribute to a scalable software architecture, review code, collaborate on design and technical feasibility, and maintain software quality.

Lead architecture and delivery of large, distributed telemetry database systems for Grafana Cloud. Own reliability, performance, cost, SLOs/SLIs, incident response, observability, automation, and cross-team alignment while mentoring engineers and driving technical strategy.

Lead architecture and evolution of scalable, fault-tolerant backend systems powering real-time AI agents and conversation intelligence. Design data storage and retrieval, partner with ML engineers to operationalize AI, drive production performance, cost efficiency, observability, and mentor senior engineers while owning production reliability.

Lead hands-on SRE/DevOps engagements to improve CI/CD, automated testing, secure deployments, observability, dependency updates, containerization, and cross-datacenter resilience. Drive TDD, test data/masking, library/runtime upgrades, Renovate automation, branch/source control best practices, secrets management, and automated DB and software deployment processes.

Develop platform support for Unity across Android mobile, laptop, and hybrid devices. Design scalable editor features, analyze and optimize runtime performance, establish benchmarks, resolve bugs, document technical designs, and improve quality through automated testing and code reviews. The role requires advanced C++, C#, and Android systems programming, experience with platform or runtime systems, multithreaded codebases, cross-language memory management, debugging, profiling, and collaboration across engineering teams.

Leads cross-functional platform engineering initiatives supporting Unity on Android devices. Designs architectures, optimizes runtime performance, establishes benchmarks, resolves complex system-level issues, mentors engineers, contributes to platform roadmaps, documents technical decisions, and participates in design reviews. The role requires advanced C++, C#, and Android systems programming expertise, strong knowledge of computer architecture, multithreading, debugging, profiling, and large-scale platform or runtime systems.

Lead backend and cross-functional projects for Lyft's Pickup, Places and Search mapping team. Design, build, and operate fault-tolerant, large-scale distributed systems, own components end-to-end, write well-tested code, conduct architecture reviews, mentor engineers, and collaborate with product, data science, and analytics to improve rider and driver pickup/dropoff experiences.

Design and deploy production-grade LLM-powered workflows, internal tools, and automations to improve recruiting, security/compliance, finance, operations, CRM integrations, and GTM processes across the company.

Lead technical work enabling global-ready products: act as technical stakeholder, define roadmaps, remove major technical blockers, write and review high-quality tested code, mentor engineers, simplify abstractions, and collaborate across distributed teams to deliver scalable web/SaaS solutions.

Lead design and implementation of high-throughput, low-latency programmatic bidding systems. Collaborate with ML engineers to deploy real-time inference, optimize distributed microservices, run experiments and quantitative analysis, and partner with product to ship scalable features. Foster operational excellence, mentor engineers, and continuously improve performance and reliability.

As an intern, you'll develop software and machine learning systems for robots, focusing on perception, intelligence, behavior, and real-time software integration.

Serve as the Tier 3 technical escalation owner: diagnose and fix code-level production issues across Node/TypeScript/AWS systems, deploy fixes, build runbooks, analyze incident trends, drive process improvements, and mentor the Application Support team.