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Outlier Tech Stack

AI training platform connecting domain experts with model improvement work

Technology, Information and Internet San Francisco 10,001+ employees Founded 2023 Privately Held

Outlier operates a distributed workforce platform where domain experts across law, medicine, math, and software complete AI training tasks—ranking responses, fact-checking outputs, and curating datasets. With 100,000+ active contributors and a tech stack anchored in OpenAI + Python + JavaScript, the company is execution-focused on model quality (fact-checking, clinical accuracy, code review) rather than infrastructure. Hiring is heavily skewed toward data roles (27) and engineers (21), with a secondary cluster in healthcare (10), suggesting simultaneous scaling of both training-data operations and vertical domain expertise.

Tech Stack 13 technologies

Core StackOpenAI Python JavaScript Java C++ Ruby Go TypeScript React Next.js Meta HTML CSS

What Outlier Is Building

◆Challenges

Improving ai model accuracy
Model response quality
Ai model improvement
High-quality urdu data training
Ai model factual accuracy
Providing expert human feedback
Clinical soundness of ai outputs
Ensuring clinical soundness
Ophthalmology ai diagnostics
Improving ai models

▲Active Projects

Develop structured hints and prompts to improve ai-assisted learning
Fact-checking ai text
Fine-tuning ai models using curated datasets
Ai training for diagnostic and reasoning tasks
Writing short stories
Ranking ai responses
Ai model training
Assess factual accuracy of ai-generated text
Model response review for clinical soundness
Analyzing ai-generated code and debugging inconsistencies

Hiring Activity

Steady85 roles · 35 in 30d

Department

Data

27

Engineering

21

Healthcare

10

Product

9

Research

7

Content

5

Legal

3

Marketing

1

Seniority

Mid

41

Senior

24

Junior

18

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About Outlier

Outlier is a distributed AI training platform owned by Scale AI. The company connects over 100,000 remote experts and graduates with structured AI improvement work across specialized domains including law, computer science, mathematics, medicine, and languages. Contributors work flexibly from home on tasks designed to improve model accuracy—writing evaluation prompts, assessing factual correctness, ranking response quality, and flagging clinical soundness issues. The platform serves as a primary data-sourcing and quality-assurance layer for large language models, with particular emphasis on high-stakes domains like healthcare diagnostics and reasoning tasks. Outlier is headquartered in San Francisco and hires across 19 countries including the United States, India, Ireland, and Germany.

HeadquartersSan Francisco

Company Size10,001+ employees

Founded2023

Hiring MarketsIreland, United States, Mexico, New Zealand, India, France, Germany, Australia

Frequently Asked Questions

What is Outlier's tech stack?

Outlier uses OpenAI, Python, JavaScript, Java, C++, TypeScript, React, Next.js, and Go as core technologies, based on Solr data.

What countries does Outlier hire from?

Outlier recruits across 19 countries: United States, India, Ireland, Mexico, Germany, France, Australia, New Zealand, and others including Scandinavia, Argentina, Brazil, and Singapore.