Top Tech Jobs & Startup Jobs in Toronto

Build and maintain backend AI capabilities for GitLab Duo Chat: design flow components and agentic flows in Python/LangGraph, integrate LLMs and multi-agent orchestration, implement and maintain APIs in the Rails monolith, improve observability and reliability, and participate in on-call rotations and cross-functional collaboration to deliver safe, scalable AI chat features.

Design, build, and maintain People systems automations and integrations (Workato, Workday, Greenhouse, Slack) using production-quality code. Improve CI/CD, reliability, observability, and AI-driven automation (Claude, MCP). Serve as technical lead for People Technology, partner with stakeholders, and drive scalable, maintainable automation solutions.

Design, maintain, and extend abuse detection and prevention systems for GitLab's SaaS platform. Serve as a core maintainer of a Ruby on Rails monolith, build anomaly detection and agentic AI mitigations, automate abuse response, collaborate with peer engineering and security teams, and produce runbooks and operational documentation.

Design, implement, and evolve complex backend features and architecture. Improve reliability, performance, and security at scale. Mentor engineers, participate in incident response, set backend standards, and integrate agentic AI into production workflows.

Build and maintain backend services and APIs for source code workflows using Ruby and GraphQL. Improve performance, reliability, caching, and observability. Collaborate cross-functionally, write tests, participate in Tier 2 on-call, and use AI coding agents where appropriate.

Design and implement backend and real-time features in the GitLab monolith for portfolio planning at scale. Optimize PostgreSQL performance, evolve APIs (GraphQL/REST), build capacity planning and work-item hierarchies, create proofs of concept, maintain automated tests, support safe rollouts with feature flags and observability, mentor contributors, and participate in on-call and production troubleshooting.

Build and maintain backend services and APIs using Ruby and GraphQL to improve source code workflows. Ensure reliability, performance, testing, observability, and on-call support. Collaborate cross-functionally and use AI agents responsibly to accelerate delivery.

Serve as a trusted advisor to a portfolio of customers to drive adoption and measurable outcomes with GitLab. Provide deployment guidance, lead workshops and Centers of Excellence, translate product usage data into actionable recommendations, monitor KPIs, manage regular touchpoints per SLAs, and collaborate cross-functionally to align on customer success and expansion plans.

Lead strategy and execution for 1:Few ABM programs, build vertical campaigns, align with Sales, evaluate MarTech, define segmentation and measurement, and tie ABM activities to pipeline and revenue outcomes.

Lead strategy, execution, and optimization of data-driven lifecycle email and CRM programs for product-led and self-service users. Build automated journeys, manage segmentation, copywriting, testing, QA, and performance analysis. Partner cross-functionally to drive onboarding, activation, conversion, and revenue growth while scaling personalized, trigger-based campaigns.