3 months ago
Toronto, CanadaSenior
Responsibilities
- Design, build, and own core components of the AI agent platform, including orchestration and internal-system tool integrations.
- Build APIs, data access patterns, and service integrations that enable agents to execute operational workflows.
- Architect knowledge and memory infrastructure so agents can retrieve data and act across systems.
- Design and implement trust and safety features such as audit trails, human-in-the-loop controls, and guardrails.
- Develop agent evaluation and testing infrastructure to measure accuracy, reliability, and behavioral regressions.
- Partner with Operations to understand workflows, identify automation opportunities, and translate process knowledge into agent capabilities.
- Mentor engineers as the team grows.
Requirements
- At least 5 years of backend engineering experience building and operating production systems.
- Hands-on experience with LLMs and AI agents, including orchestration, RAG, tool or function calling, or similar technologies.
- Strong API design and systems integration skills.
- Product-minded approach with the ability to contribute to product decisions and question requirements.
- Proven ownership of complex projects in ambiguous, early-stage environments.
- Strong backend engineering fundamentals and the ability to design, build, and operate production systems.
- Curiosity and motivation to develop practical expertise in AI, LLMs, and agent systems.
- Ability to work autonomously, balance quality with speed, and operate effectively in a fast-paced environment.
Benefits
- Welcoming and casual work environment with great benefits and wellness program offerings.
- Company retreats and opportunities to interact with and learn from startup community leaders.
- Hybrid role based in the Justworks Toronto office.
- Inclusive workplace with equal opportunity and reasonable accommodation support.
Tech Stack
Apache KafkaAWSC#CircleCIDatadogDockerElasticsearchGitGoJavaJavaScriptKubernetesMySQLPythonRedisRuby on RailsTerraform
Categories
About Justworks
Justworks provides a PEO and SaaS platform for small and midsize businesses to run payroll, offer benefits, and manage HR and compliance. Products include access to health insurance and 401(k), payroll and contractor payments, onboarding tools, and reporting, sold via subscriptions and PEO service fees. Founded in 2012 and headquartered in New York City, the company is privately held and serves employers across the United States.