Hiring: Applied AI Engineer Company: Day One Partners Location: New York City Metropolitan Area Job Posted Time: 2026-09-11 18:06:15 Target Skills & Keywords : Clean Architecture, LLM, PATs About the job Required Skills: •You’ll build the systems surrounding frontier models that determine •how agents remember, act, coordinate, and improve. •The core scope spans •agent memory, task optimization, agent orchestration, harnesses, evals, and benchmarks •, alongside the infrastructure required to run these systems securely and reliably at scale. •This is a hands-on engineering role for someone who wants to work below the application layer. You should be excited by the hard parts of making agents actually work in production, not just integrating an LLM into an existing product. •What You’ll Do •Design and improve •agent memory, context management, task execution, and multi-step orchestration •Build and optimize •agent harnesses •, including tool use, prompting, planning, feedback loops, and failure recovery •evals and benchmarks •that rigorously measure agent quality, regressions, and improvements •Build infrastructure for running and scaling sandboxed agents, including isolation, observability, reliability, and cost/performance Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!