Top Software Engineer Jobs in Toronto

Design and build AI‑enabled full‑stack capabilities for insurance product modeling and content transformation. Implement Java microservices on AWS with Docker/Kubernetes, create performant JavaScript/TypeScript front ends, leverage AI-assisted coding, improve CI/CD and observability (TeamCity, Git workflows), apply enterprise architecture and design patterns, and collaborate with product and engineering teams to deliver secure, scalable SaaS services.

Lead technical strategy and architecture for fintech products, mentor engineers, design and implement high-throughput distributed web applications (invoicing, payments, payroll), drive multi-team technical decisions, review code, and improve engineering practices.

Hands-on technical leader building full‑stack customer-facing features across React/TypeScript frontends and Python/Node backends, contributing to AI capabilities (LLM integrations, agentic workflows, MCP), setting technical standards, mentoring engineers, and driving delivery from design through production.

Design, build, and maintain backend foundations and tooling for an internal developer platform. Lead consolidation of platform primitives (developer portal, templates, GraphQL, event-driven patterns, OpenAPI, CI/CD). Collaborate with product teams, raise engineering standards, and integrate AI-native workflows to accelerate developer productivity.

Design, build, and operate MaintainX's end-to-end search and retrieval platform, including indexing, ranking, relevance tuning, integrations, and AI-enhanced semantic/vector search. Optimize distributed systems for reliability and performance, iterate quickly with product teams, and participate in business-hours on-call duties.

Design, build, and operate public-facing REST APIs and integration platform components. Implement platform standards (auth, rate limiting, versioning), bulk/batch sync, contract testing, CI/CD, SDKs, and integration marketplace workflows. Own production services end-to-end (monitoring, on-call, incident response) and improve reliability, performance, and developer experience for enterprise integrations.

Design and implement full-stack customer-facing features using React, TypeScript, and Python. Contribute to AI-powered capabilities (LLM integrations, agentic workflows, MCP/A2A), ensure code quality, collaborate with product and design, own workstreams end-to-end, and mentor through pairing and reviews.

Lead design and implement end-to-end features across frontend and backend for a data analytics platform. Build React/TypeScript UIs, backend services (JVM languages/Python/GraphQL), work with Postgres, cloud and distributed systems, collaborate with Product and UX, mentor engineers, improve processes, and adopt new technologies including AI to accelerate development.

Design and build machine-learning-driven robotic systems that operate in the real world, support portfolio company growth, influence product and technical direction, and advance company and career outcomes.

Designs, builds, and evolves scalable backend systems for a live mobile game. Responsibilities include supporting live-ops and game releases, leading incident management and reliability improvements, driving backend technical roadmaps, delivering integrated server-client features, mentoring engineers, coordinating with cross-functional teams, and improving code quality, performance, and operational readiness.

Design behavioral specs, harnesses, and validation systems so AI agents implement reliable full-stack features. Build CI gates, structural tests, linting, knowledge bases, and end-to-end verification. Diagnose failures across spec, harness, and agent layers. Architect and operate production systems across cloud and on-prem environments for regulated energy deployments, prioritizing reliability, observability, and graceful degradation.

Develop core backend components for a blockchain network, focusing on networking, reliability, scalability, and high-quality software practices.

Design and implement .NET solutions using AI agents and GitHub Copilot within a spec-driven development process. Ensure test-first delivery, code quality, security, and performance. Collaborate with product, design, and data science, mentor junior engineers, and promote cross-team best practices and process continuity.

Design, implement, and maintain scalable Python/Django infrastructure and distributed systems on AWS. Own features from conception to deployment, troubleshoot complex issues, optimize database performance, and collaborate with product and engineering teams to deliver production-ready, well-tested solutions for large datasets.

As a Distributed Systems Engineer, you'll design and evolve LiveKit's core systems, implement resilient architectures, and enhance reliability and developer velocity, working on critical features in production environments.

Design and evolve core control, data, and observability systems; implement resilient region-spanning architectures; build libraries, protocols, and tooling; diagnose and harden critical paths using metrics, tracing, and testing; and shape platform capabilities across identity, scheduling, observability, and distributed state management.

The role involves designing and evolving core systems at LiveKit, implementing resilient architectures, and building tools to enhance system reliability and developer speed. Strong distributed systems experience and programming skills are essential.

Design, implement, and operate low-latency, highly available distributed control, data, and observability systems. Build region-spanning architectures, libraries, protocols, and tooling; diagnose and harden critical paths using metrics, tracing, testing, and real traffic; and shape platform capabilities around identity, scheduling, observability, and distributed state management.

As a Senior Software Engineer, you will develop AI-powered systems to enhance accounting workflows, build backend services, and ensure optimal performance and reliability of AI solutions.

Lead the Drive App product vision, roadmap, and driver experience. Drive cross-functional execution with engineering, design, and marketing, define metrics and experiments, improve driver satisfaction and retention, and lead platform evolution while communicating strategy to senior leadership.

Design and build scalable architecture and tooling for Zip's engineers. Lead initiatives to enhance performance, reliability, and quality of software development processes.

Lead architecture, design, and delivery of large-scale, high-availability systems across cloud and mobile. Advance AI enablement and agentic workflows, own full components end-to-end, debug stack-wide issues, mentor engineers, and drive cross-team technical strategy and best practices.

The Senior Software Engineer will design and implement scalable systems using .NET and Angular, lead modernization initiatives, and ensure the reliability of production systems while collaborating with engineering teams.

The Senior Software Engineer will lead the redesign of an auto repossession platform, enhancing system resilience and integrating AI tools to improve operational efficiency. Responsibilities include system architecture, technical decision-making, and collaborative development across the software lifecycle.

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.