Top Software Engineer Jobs in Toronto

Lead backend and cloud platform engineering for an AWS-based integration platform. Responsibilities include developing Node.js APIs, event-driven Kafka services, Redis caching, file ingestion and data synchronization pipelines, infrastructure management with Terraform, CI/CD, observability, incident response, and reliability improvements. The role also leads an engineering team, mentors developers, coordinates vendor knowledge transfer, creates operational runbooks, and transitions production support to an internal team.

Lead the architecture and technical direction of Lyft’s mapping data platforms, including offline experimentation tooling, route simulation services, scalable pipelines, data governance, and observability. Own pipeline reliability and SLAs, evolve schemas, optimize SQL and data processing, build backend services and AI-assisted data tools, and mentor engineers. Collaborate with engineering, product, machine learning, and data science teams to improve routing quality and travel-time accuracy.

Design, architect, and implement new features for the Spellbook application while collaborating with product management and improving existing functionalities using AI technologies.

The role requires designing and developing web applications and backend systems, integrating LLMs, and ensuring quality software delivery.

The Software Engineer will develop backend systems for an AI Energy Agent, including data integration, microservices, and scalable architecture, focusing on performance and reliability.

The Founding Software Engineer will build and enhance crisis-intervention software, focusing on mobile and web applications for government welfare, ensuring compliance and integrating data securely. Responsibilities include feature development, security enhancements, and managing interns.

The Full-Stack Engineer will develop and maintain web applications, translating UI/UX designs into responsive apps, optimizing applications, and writing clean code.

As a Software Developer II, you'll implement .NET solutions, maintain quality assurance, collaborate with teams, minimize technical debt, and advance your skills using AI-driven tools.

Responsible for designing and implementing authentication features in Go and TypeScript, enhancing Auth architecture, and collaborating with teams to improve user experience.

Design and maintain backend services and infrastructures focusing on Node.js, TypeScript, and Kubernetes, ensuring reliability and scaling.

Owner of end-to-end production problems: design, build, experiment, ship, and measure outcomes across backend, frontend, data pipelines and AI. Act as a technical leader, reviewer, incident mitigator, and cross-functional partner to product and design while advancing AI-driven tooling and safeguards.

Own and set direction for a large domain, design cross-team architecture, build production systems (often AI-enabled), partner with product/design/data, coach senior engineers, and remain hands-on in code and delivery.

Shape the architecture and evolution of Java-based SaaS platforms and shared backend services. Lead complex distributed-systems initiatives across multiple teams, remain hands-on with implementation and troubleshooting, and improve scalability, reliability, observability, security, and operational readiness. Establish engineering standards for Java development, APIs, testing, CI/CD, and production operations while mentoring senior and staff engineers and partnering with Product, Security, and Architecture leaders.

Build and maintain PHP and Python services and RESTful APIs powering credit card issuance, rewards, and payments. Own features end-to-end, make architectural decisions, optimize MySQL queries, integrate with banking cores and payment networks, and mentor junior engineers while working asynchronously in a remote-first environment.

Lead and mentor a team of developers, oversee cloud product delivery, drive engineering practices, and ensure high-quality standards while contributing to cross-functional initiatives.

Build and maintain cross-platform mobile apps (primarily Flutter) and full-stack services. Design and operate serverless backend infrastructure on GCP/Firebase, model Firestore databases, implement RESTful APIs and integrations, monitor and debug production systems, support deployments, and collaborate across product, design, QA, and engineering to deliver scalable, well-tested features.

Lead technical strategy and architecture for Coinbase Payments: design and evolve high‑availability, low‑latency funds‑flow and rails systems, drive cross‑team initiatives and reliability improvements, enforce financial correctness, mentor senior engineers, and align stakeholders across product, risk, and compliance.

Owns the design, development, and production deployment of AI-enabled software across diverse legacy and cloud environments. Responsibilities include building APIs, integrations, data pipelines, retrieval systems, user interfaces, and modernization upgrades; integrating LLM capabilities with SaaS, ERP, CRM, and on-premise systems; optimizing reliability, accuracy, latency, and cost; and creating reusable AI patterns, playbooks, and training for business units.

Design and scale backend systems for consumer-facing financial products, build high-volume APIs, and improve reliability, security, code quality, and operational excellence. Collaborate with product, finance, credit, compliance, support, and analytics teams. Participate in technical discussions, code reviews, and roadmap planning while mentoring peers and applying AI-powered development tools.

Own quality engineering for high-throughput payment systems by architecting automated regression, performance, stress, and load testing. Build emulators for external payment systems, integrate quality gates into CI/CD pipelines, validate microservices, event-driven architectures, and databases, and use Prometheus and Grafana for observability. Apply AI-assisted testing, synthetic data generation, and edge-case analysis while mentoring engineers and preventing incidents through telemetry-driven testing and post-mortems.

Own quality engineering for high-throughput payment systems by designing automated regression suites, performance and load tests, quality gates, external-system emulators, observability-driven test environments, and AI-assisted testing workflows. Partner with feature teams and product leaders to improve reliability, scalability, security, and transactional accuracy. Mentor engineers, support incident prevention, and embed automated validation throughout the software development lifecycle.

Design, implement, and operate internal and edge networking infrastructure at global scale across multi-cloud regions. Build services, tools, and automation to expose network functionality, improve routing, failover, and scaling. Lead cross-team initiatives including code and design reviews, ensure operational robustness and security hygiene, and participate in on-call rotation.

Lead architecture and deliver enterprise features for Auth0 Organizations. Drive technical improvements, orchestrate cross-team projects, mentor engineers, collaborate with PM/design, and build scalable, secure backend and full-stack services with strong observability.

Define and drive the architectural vision for Okta's UI platform. Build and maintain shared libraries, reusable components, and internationalization/localization infrastructure. Lead cross-team alignment, review high-impact designs, mentor senior engineers, and implement the platform's most complex, foundational components.

Build and own developer-facing platform surfaces (APIs, SDKs, CLIs) that work for humans and AI agents. Drive technical direction, cross-team decisions, and deliver high-quality developer tooling and API experiences at scale.