Valarian

AI Engineer (Harness)

Valarian · London

Posted about a month ago

or apply directly on Valarian's site. We never take the application ourselves.

Is this posting real?

This role has been open
36 days
Valarian's roles stay open a median of 56 days
Reposted
No
Salary listed
No
0% of Valarian's roles list one
Ghost-job risk at Valarian
high
9 stale, 2 reposted of 11 open
Hiring momentum
13 roles opened in the last 90 days
↑ up vs. the prior 90 days
Last confirmed on the employer's board
2026-10-23

Measured from postings appearing on and disappearing from Valarian's own lever board since 2026-08-04. Full hiring picture for Valarian.

About this role

As an AI Engineer at Valarian Technologies, you will be responsible for designing and maintaining evaluation frameworks for AI models, focusing on experimental design and statistical validation. Your role involves creating robust evaluation datasets, developing automated judging systems, and conducting error analyses to enhance the performance of multi-step agentic systems. You will collaborate with engineering teams to implement improvements based on your insights and findings.

Our read on this posting2.8out of 5
benefits
4/5
freshness
1/5
career value
4/5
role clarity
5/5
pay transparency
0/5

Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of Valarian as an employer.

What you need

  • Grounding in Statistics & Experimental Design
  • LLM-as-a-Judge Validation
  • Evaluation Dataset Engineering
  • Evaluation of Non-Deterministic Multi-Step Systems
  • Metric Design & Integrity
  • Rigor in Error Analysis

Nice to have

  • Experience with agent and evaluation frameworks (e.g., LangChain, LangGraph, AutoGen, lm-evaluation-harness, Promptfoo, or Ragas)
  • Exposure to running evaluation pipelines or agent workloads within secure, enclave, or Kubernetes environments.

What you get

  • Equity
  • A competitive salary
  • Employer pension contributions
  • Private health insurance
  • Hybrid work setup
  • Gym memberships

Worth weighing

  • Role involves working in an emerging domain with no standard playbook
  • Focus on statistical validation and rigorous experimental design may not appeal to all candidates
  • Hybrid work model requires in-office presence three days a week

Summarised from Valarian's posting. Read the full original.

Listed by Valarian on their lever job board, last confirmed open on 2026-10-23. PitchMeAI is not the employer.

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