AI Systems Engineer, Codex Agents

Company hidden

San Francisco Full-time$230k–$385k / year Posted 30+ days ago

Above market. This role pays above the $198k median for similar USD roles (234 comparable postings in our corpus).

AI Systems Engineer - Codex Core Agents You’ll work with research, infrastructure, and product to design agent harness capabilities, run experiments and ablations across the model + system prompt + harness stack, build frameworks for assessing production agent performance, and turn messy failures into durable improvements. What You’ll Do * Design and build the core agent harness and execution loop that lets Codex agents interpret model outputs, use tools, execute code, and complete long-horizon tasks safely. * Build sandboxing, isolation, orchestration, state, and workflow infrastructure…

See the company and apply

Unlock to see who’s hiring, read the full description and apply on the company site.

Checking access…

See how well you match this job

Upload your resume and we’ll score your fit for this role — then tailor your CV to it with AI. Free, no credit card.

Check your match

Explore related jobs

Want more roles like this? Browse fresh jobs or tailor your resume with AI.