Senior AI Engineer - Harness Engineering (Kimchi)
New
This is a location-specific opportunity. We are currently accepting applications from candidates residing in the following European countries: Bulgaria, Croatia, Estonia, Greece, Hungary, Latvia, Lithuania, Poland, Romania, Slovakia, Slovenia, and Ukraine.Full-TimeSenior
Salary6,500 - 9,000 EUR per month
Apply NowOpens the employer's application page
Job Details
- Required Skills
- AWSGCPKubernetesTypeScriptAzureGoGrafanaPrometheus
Requirements
- Used AI coding agents in anger, not just demos; have opinions about Claude Code, Codex, OpenCode, Cursor, and understand why agents get stuck.
- Strong TypeScript or Go in production. Comfort moving between them. Our surface is TypeScript; our core is Go.
- Think in harness terms, asking about missing context, hooks, and constraints when an agent hallucinates.
- Drive features end-to-end: Design → build → ship → measure → iterate.
Responsibilities
- Build and evolve the agent harness - ship hooks, permission gates, and context compaction. Every AGENTS.md constraint traces to a failure you personally diagnosed.
- Own long-horizon execution - multi-session task completion via spec-driven prompting, worktree-per-slice git, Ralph loop recovery, and stuck detection. Completion rate is your metric.
- Architect planner/executor/evaluator pipelines - planning with a reasoning model, execution with a fast one, evaluation with a third. No self-verification.
- Manage agent memory and context - state persistence across sessions, context compaction, tool-call offloading. Zero context rot on multi-day work.
- Own the harness surface - CLI, TUI, MCP integrations, sandboxed execution, telemetry. TypeScript on the surface, Go where it matters.
View Full Description & ApplyYou'll be redirected to the employer's site
