Full-Time

Applied Researcher

Updated on 9/16/2026

Haize Labs

Haize Labs

11-50 employees

Platform ensuring AI reliability in production

Compensation Overview

$175k - $265k/yr

+ Equity

H1B Sponsorship Available

San Francisco, CA, USA + 1 more

More locations: New York, NY, USA

In Person

Category
AI & Machine Learning (1)
Required Skills
Machine Learning
Observability
Reinforcement Learning

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Requirements
  • Experience probing model capabilities, such as through benchmark papers.
  • Experience in both a research lab and a startup environment is likely.
  • Contribution to research frameworks such as Prime-RL, Verl, or Harbor is likely.
  • Education is not required; exceptional candidates are considered regardless of educational background.
Responsibilities
  • Push the Pareto frontier of model capabilities.
  • Rapidly synthesize reinforcement learning environments and reward functions or models.
  • Fine-tune agents to improve performance on business tasks.
  • Develop the research platform, including observability, evaluation, custom reward models, and simulation testing, to connect domain experts to models.
  • Build, debug, and evaluate agents.
  • Scope work, plan projects, and build customer relationships.
Desired Qualifications
  • Experience contributing to popular research frameworks such as Prime-RL, Verl, or Harbor.
  • Experience in both a research lab and a startup environment.

Haize Labs builds a platform that makes Generative AI safer and more reliable in real business settings. It helps teams move AI models from proof-of-concept to live production by embedding trust, safety, and reliability into the applications, so they perform predictably and can be governed responsibly. The platform likely includes testing, monitoring, and governance tools to align models and ensure safe deployment. Through a partnership with AI21 Labs, Haize Labs works on aligning large language models and setting standards for ethical AI in business, signaling a commitment to responsible AI use. Compared with others in the space, its differentiators are the explicit focus on production readiness, governance, and collaboration to align LLMs with business ethics and safety goals. The overall goal is to accelerate the adoption of Generative AI in business by providing a dependable, safe, and compliant deployment path.

Company Size

11-50

Company Stage

N/A

Total Funding

N/A

Headquarters

New York City, New York

Founded

2023

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Simplify Jobs

Simplify's Take

What believers are saying

  • 2026 hiring page shows active product expansion, not a stalled research project.
  • 2025 seed financing at $100 million valuation gives strong recruiting and runway.
  • Frontier labs still need production-grade safety tools before broad AI deployment.

What critics are saying

  • Anthropic concentration risks revenue collapse if one large customer leaves in 2026.
  • Open-source evaluation tools from OpenAI, Anthropic, and Hugging Face compress pricing fast.
  • Without breakout distribution, 2027 funding depends on proving repeatable enterprise ROI.

What makes Haize Labs unique

  • 2024: Haize Labs automates red-teaming, fuzzing, and jailbreak discovery for GenAI.
  • 2026: j1 judge models and Sphynx deepen its reliability-testing moat.
  • 2025: Anthropic and AI21 Labs signal credibility with frontier-model buyers.

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Benefits

Company Equity

Growth & Insights and Company News

Headcount

6 month growth

20%

1 year growth

20%

2 year growth

80%
36Kr
Sep 11th, 2024
Haize Labs Valued at $100M After 7 Months

Haize Labs, a startup focused on preventing AI jailbreaks, has achieved a valuation of $100 million after securing new funding led by General Catalyst. Founded by Harvard graduates Leonard Tang, Steve Li, and Richard Liu, the company automates red team testing to identify and fix AI vulnerabilities. Their products, Haizing Suite and Sphynx, are used by top AI firms like Anthropic and Hugging Face. Previously, they raised $1.05 million in angel funding.

MarkTechPost
Aug 6th, 2024
Haize Labs Introduced Sphynx: A Cutting-Edge Solution for AI Hallucination Detection with Dynamic Testing and Fuzzing Techniques

Haize Labs has recently introduced Sphynx, an innovative tool designed to address the persistent challenge of hallucination in AI models.

Business Insider
Jun 29th, 2024
VCs clamor to invest in the red-hot early-stage round for AI safety startup Haize Labs

Haize Labs is building an automated red-teaming solution for gen AI companies. It has received multiple term sheets for its early-stage funding round.