[Hiring] Senior AI Engineer - Harness Engineering @Cast AI
Senior AI Engineer - Harness Engineering @Cast AI
Artificial Intelligence
Salary €6,500 - €9,000
Employment Type full-time
Posted 2d ago

[Hiring] Senior AI Engineer - Harness Engineering @Cast AI

2d ago - Cast AI is hiring a remote Senior AI Engineer - Harness Engineering. πŸ’Έ Salary: €6,500 - €9,000 πŸ“Location: Estonia, Greece, Hungary, Poland, Romania, Lithuania, Bulgaria, Croatia, Slovakia, Latvia

Role Description

Kimchi is the AI platform inside CAST AI, focused on building the execution layer where agents perform real work. We are hiring for roles that involve:

  • Coding agents, agent runtimes, orchestration systems, and reliability engineering.
  • Building on our inference layer, which includes multi-model inference with intelligent routing and an OpenAI-compatible API.

Qualifications

  • Experience using AI coding agents in real work environments.
  • Strong proficiency in TypeScript or Go, with comfort moving between them.
  • Ability to think in harness terms and diagnose agent failures.
  • Experience driving features end-to-end: design, build, ship, measure, iterate.

Requirements

  • Experience with AI coding agents beyond demos.
  • Strong TypeScript or Go in production.
  • Understanding of harness concepts and agent context management.
  • Ability to manage agent memory and context effectively.

Responsibilities

  • Build and evolve the agent harness, including hooks and permission gates.
  • Own long-horizon execution with multi-session task completion.
  • Architect planner/executor/evaluator pipelines.
  • Manage agent memory and context for state persistence.
  • Own the harness surface, including CLI and TUI integrations.

What success looks like (after 6 months)

  • Shipped at least one major harness feature end-to-end.
  • Added constraints to AGENTS.md based on observed failures.
  • Improved a measurable reliability metric.
  • Formed strong opinions about the harness's effectiveness.

Benefits

  • Competitive salary (€6,500 - €9,000 gross, depending on experience).
  • Flexible, remote-first global environment.
  • Collaboration with a global team of cloud experts.
  • Equity options.
  • Fast-paced workflow with quick feedback.
  • 10% of work time dedicated to personal projects or self-improvement.
  • Learning budget for professional development.
  • Annual hackathon to spark new ideas.
  • Team-building budget and company events.
  • Equipment budget for necessary tools.
  • Extra days off for work-life balance.

Company Description

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.

*As part of our standard hiring process, a background check may be conducted at the final stage of recruitment through our third-party provider, Checkr.

*Please note that Cast AI does not provide any form of visa sponsorship/work permit.

Before You Apply
️
remote Be aware of the location restriction for this remote position: Estonia, Greece, Hungary, Poland, Romania, Lithuania, Bulgaria, Croatia, Slovakia, Latvia
β€Ό Beware of scams! When applying for jobs, you should NEVER have to pay anything. Learn more.
Senior AI Engineer - Harness Engineering @Cast AI
Artificial Intelligence
Salary €6,500 - €9,000
Employment Type full-time
Posted 2d ago
Apply for this position
Did not apply βœ“
Applied βœ“
Sent Follow-Up βœ“
Interview Scheduled βœ“
Interview Completed βœ“
Offer Accepted βœ“
Offer Declined βœ“
Unlock 150,000+ Remote Jobs
️
remote Be aware of the location restriction for this remote position: Estonia, Greece, Hungary, Poland, Romania, Lithuania, Bulgaria, Croatia, Slovakia, Latvia
β€Ό Beware of scams! When applying for jobs, you should NEVER have to pay anything. Learn more.
Apply for this position
Did not apply βœ“
Applied βœ“
Sent Follow-Up βœ“
Interview Scheduled βœ“
Interview Completed βœ“
Offer Accepted βœ“
Offer Declined βœ“
Unlock 150,000+ Remote Jobs
Γ—

Apply to the best remote jobs
before everyone else

Access 150,000+ vetted remote jobs and get daily alerts.

4.9 β˜…β˜…β˜…β˜…β˜… from 500+ reviews
Unlock All Jobs Now

Maybe later