Top Tech Jobs & Startup Jobs in Toronto

Design and implement product-level authentication, authorization, multi-tenant isolation, and privacy-preserving data lifecycles. Ship security-sensitive changes end-to-end, own application and API security, threat modeling, telemetry for security events, and integrate conservative partner security controls.

Build and scale low-latency, reliable infrastructure for online AI evaluation: APIs, gateways, streaming handling, observability, enterprise features (rate limiting, auth, billing), and integrations with LLM providers and evaluation platforms.

Lead GTM strategy and revenue operations: run pipeline and forecast cadence, build shared reporting, partner with sales on deal structuring and deal desk, set pricing and packaging, own quote-to-cash and billing accuracy, and coordinate product/engineering for billable SKU launches.

Senior individual contributor responsible for full-cycle revenue generation with top AI model labs and select enterprises: managing relationships, structuring and closing seven-figure contracts, driving expansion across modalities, ensuring renewals and upsells, aligning delivery and product teams, and defining GTM strategy for new evaluation and data products.

Build and maintain low-latency, reliable backend APIs and data systems for Arena's evaluation products. Design schemas, scoring pipelines, usage metering, billing, auth/RBAC, multi-tenancy, and integrate research evals into durable, scalable product surfaces. Collaborate with infra, research, and product teams to ship enterprise-grade services and scale data pipelines.

Build and operate the core infrastructure for Arena's online evaluation systems: design low-latency, high-reliability APIs and gateways, implement enterprise-grade features (rate limiting, auth, metering, audit logging), instrument observability (tracing, latency, usage tracking), integrate with LLM providers and the evaluation platform, and collaborate with research and product teams to scale and harden systems for bursty, unpredictable traffic.

Provide embedded legal counsel to product and engineering on privacy, IP, and consumer protection; lead Arena's global privacy program (GDPR, CCPA/CPRA, cross-border transfers); advise on AI governance and responsible deployment; support commercial contracts and data flow frameworks; build privacy processes, playbooks, internal agents, and legal-tech integrations to scale operations.

The Senior Software Engineer will own feature development from design to deployment, focusing on user feedback and collaboration with ML researchers.

Lead design and scaling of People programs (onboarding, performance, compensation), advise leaders on org design and employee relations, build lightweight processes, manage compliance, and drive culture and headcount planning for a growing AI startup.

Responsible for designing experiments to evaluate AI models, developing evaluation methodologies, analyzing performance data, and collaborating on production insights.