Top Python Jobs in Toronto

Lead and own the information security program and security engineering at NEAR Foundation. Drive SOC 2 Type 2 and ISO 27001 readiness, run logging/monitoring/incident response, manage vulnerability and third-party risk, harden identity/access/endpoint stacks, automate security and compliance across SaaS, and advise on tooling and cloud security (AWS/GCP).

Embed within a core business area to define problems, build metrics, run analyses and experiments, create reports, surface insights, and drive data-informed product, growth, AI, or partnership outcomes end-to-end.

Embedded within a core business area, define analytics problems, build metrics/reports, run analyses and experiments, surface insights, and drive data-informed decisions end-to-end with stakeholders.

Lead embedded BizOps & Analytics for a core business area (growth, product, AI, or partnerships). Define problems, build metrics/reports, run analyses and experiments, surface insights, and drive recommendations to stakeholders to improve key business outcomes end-to-end.

Embed on a core business team to define problems, build metrics/reports, run analyses and experiments, and drive data-informed recommendations end-to-end to improve growth, product, AI/automation, or partnerships.

Embed with a core business unit to define problems, build reports, run analyses and experiments, surface data-driven insights, and drive recommendations through to measurable outcomes across growth, product, AI, or partnerships.

Lead research and development of fuel detection and wildfire-risk models using satellite, LiDAR, and environmental data. Design validation, uncertainty quantification, and ground-truth strategies. Prototype ML approaches and partner with engineers to productionize models. Integrate fire science with data-driven methods, define scientific standards, communicate results, and mentor engineers.

Perform protocol-focused security research to prevent vulnerabilities on Ethereum mainnet. Tasks include AI-assisted analysis, fuzzing, manual review, reviewing hardforks and spec changes, improving security tooling and automation, coordinating disclosures, and supporting audits and audit competitions while collaborating with devops, specifications authors, and client implementers.

Deliver, integrate, maintain, and optimize Akamai-based web security solutions (CDN, WAF, API Security, Bot Management). Architect customer configurations, analyze web traffic and system architectures, remediate security issues, document technical work, collaborate with cross-functional teams, automate deployments using Terraform/Akamai CLI and scripting, and use tools like Burp Suite, Postman, and cURL for troubleshooting and validation.

Lead and remain hands-on for security engineering and operations: design and harden controls, build automation and detection, manage MDR, run incident response, and own vulnerability management, metrics, and cross-functional security integration.

Design, build, and optimize Microsoft Fabric-based ingestion, transformation, and curated data layers. Migrate legacy sources, implement business rules, develop API-driven workflows, ensure data quality, security, and monitoring, and support CI/CD and operational delivery for analytics and reporting.

Design, build, and maintain a customer-facing threat intelligence platform with a backend and data-engineering focus. Collaborate with product and engineering leadership, implement scalable data ingestion and processing systems, optimize platform performance, and participate in agile development practices and release processes.

Own and automate the end-to-end ML lifecycle: build, deploy, monitor, test, and retire models at scale. Design production-grade, highly available ML infrastructure and CI/CD pipelines, implement governance, and collaborate with engineering and security teams.

Lead full‑stack development and reliability improvements for the Firefox Add‑ons ecosystem, building features, automated moderation pipelines, reviewer tools, and observability. Improve platform reliability, respond to incidents, and help keep the ecosystem safe and trustworthy. Collaborate across design, product, QA, and community contributors and contribute openly through PRs and code reviews.

Build, operate, and scale cloud-native backend services and APIs for a high-volume vehicle marketplace. Embed AI-driven capabilities into features, use AI tools to accelerate development, participate in on-call rotations, improve reliability, and collaborate with Product, Data, Infrastructure, and SRE teams to deliver production-ready systems.

Partner with engineering and product teams to design, ship, and integrate scalable security solutions. Lead security reviews, threat modeling, and technical roadmaps, use metrics to drive risk reduction, mentor engineering teams, and leverage LLMs, CI/CD, and AI tooling to improve security at scale.

Design, implement, and operate security capabilities across endpoint, cloud, identity, and network environments. Build integrations and automation (scripting/APIs), extend vendor platforms, improve interoperability, monitor and optimize security services, and partner with engineering and IT teams to embed secure, scalable controls that reduce risk.

Design and drive security architecture for applications, services, and infrastructure. Partner with engineering and DevOps on secure backend design, cloud and container security, CI/CD hardening, and access controls. Conduct threat modeling, risk assessments, and security reviews; integrate security tooling; enforce secure coding practices; mentor engineers; and stay current on fintech and blockchain threats and compliance standards.

Own specific product segments, define requirements, write product specs, coordinate development, collaborate with customers and cross-functional teams, use data and A/B testing to drive decisions, and maintain high quality and user-focused design.

Build and maintain scalable release automation and CI/CD pipelines to run tens of thousands of build/test/release tasks daily. Improve developer experience, optimize cloud-based build resources, collaborate with distributed teams, perform code reviews, and respond to critical service outages during normal working hours.

Lead product development by working with users, customers, and engineering to define requirements, write product specifications, coordinate project delivery, build technical understanding, and use data (including A/B testing) to drive decisions and improvements.

Own and scale Mozilla's web bug bounty program; triage and validate reports; drive end-to-end remediation with engineering teams; perform targeted code reviews (JavaScript, Python); collaborate with SIRT on incidents and post-incident reviews; build tooling and metrics to improve triage, automation, and program insights.

Own and mature the enterprise security program: manage identity/SSO, EDR, MDM, and SaaS security; secure cloud and developer stacks (GitHub, AWS, GCP); run vulnerability management, backup testing, and incident response; ensure endpoint lifecycle governance and maintain compliance with ISO 27001 and SOC 2.

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.

Design, build, and operate firewall, segmentation, and zero-trust controls across data center, corporate, and cloud networks. Implement infrastructure-as-code for policy and CI/CD deployment, manage lifecycle and rule hygiene, build network detection capabilities, operate VPN/remote access patterns, and document architecture and runbooks while partnering with Network Engineering and Security Operations.