# Member of Technical Staff, Frontier RL Environments at Hark

- Company: Hark
- What the company does: At Hark, we are building the most advanced personal intelligence in the world.
- Company website: https://hark.com
- Type: Startups
- Level: Senior
- Location: San Jose
- Work setup: On-site
- Pay: $180K to $450K base salary per year (USD)
- Posted: 2026-08-24
- Apply by: 2026-10-08
- Apply: https://job-boards.greenhouse.io/hark/jobs/4380699009
- Page: https://www.1752.vc/careers/jobs/hark-member-of-technical-staff-frontier-rl-environments/

## About the role

Hark is an artificial intelligence company building advanced, personalized intelligence. One that is proactive, multimodal, and capable of interacting with the world through speech, text, vision, and persistent memory.

## What they're looking for

- Strong background in machine learning, with hands-on experience training or fine-tuning large models — LLMs, multimodal, or equivalent systems
- Direct, hands-on work with LLMs and modern post-training techniques: RL, RLHF/RLAIF, reward modeling and graders, synthetic data pipelines, or building agentic/tool-using systems
- A track record on fuzzy problems, where the objective is loosely defined, the data is noisy, and getting to a good answer takes both judgment and hands-on engineering
- A strong point of view on what makes a personal assistant genuinely useful, trustworthy, and pleasant to rely on daily, not just a leaderboard number moving up
- Skill at turning a vague behavioral concern into a testable experiment: form the hypothesis, stand up the pipeline, run it, read the results, and decide the next move
- Ease operating across research, product, infrastructure, data, hardware, and safety teams, and translating clearly between each

Tags: Computer Use Agents