Senior AI Engineer

Justworks is a company focused on helping businesses streamline their operations, particularly in HR. They are seeking a Senior AI Engineer to join their Data & Analytics team, where the role involves identifying AI opportunities across the organization, building AI-powered tools, and resolving systems gaps to enhance decision-making processes.

Responsibilities:

• Drop into business functions to identify where AI has the highest leverage, define what to build, and own the full arc from scoping through handoff
• Spot and resolve AI-specific systems gaps across the org - missing shared infrastructure, fragmented adoption patterns, absent measurement benchmarks - and move on them faster than the rest of the org could
• Scan externally for emerging AI capabilities and market patterns; translate signal into written briefs that inform what the team experiments on next
• Build AI-powered tools and pipelines using frontier models, agent frameworks, and LLM infrastructure as core building blocks, not experiments
• Design and implement evaluation frameworks (evals) to measure whether AI systems are performing as intended — not just technically functional but meaningfully useful
• Instrument AI systems for observability: logging, tracing, cost tracking, latency monitoring, and anomaly detection using tools like Datadog, LangSmith, or equivalent
• Navigate cross-functional ownership dynamics: identify the right stakeholders, build alignment, and hand off in a way that sticks
• Represent AI Frontiers in cross-functional forums and executive reviews as a credible voice on what AI can and can't do
• Perform other related responsibilities as needed based on department and/or organizational needs