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Principal Research... at Character.ai — Redwood City

C

Principal Research Engineer, Post-Training

Character.aiConversational AI company

Redwood City, United States·Lead

A

Andreessen Horowitz

Nat Friedman

Elad Gil

S

SV Angel

A Capital

Data & AI

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About the role

TL;DR

Lead post-training of LLMs for engaging conversational AI.

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Required skills

LLMsPythonLeadershipTeam ManagementMentoringProblem SolvingAnalytical ThinkingCritical ThinkingCommunication

Nice-to-have skills

KubernetesDocker

Domain expertise

aideveloper-tools

Tech stack

PythonLLMsKubernetesDockerGit

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Details

Level: Lead
Work type: onsite
Education: PhD
Posted: 2026-06-23

Company snapshot

Conversational AI company

Character.AI is a generative AI chatbot service where users can engage in conversations with customizable characters. It provides open-ended conversational applications, allowing users to create and converse with millions of AI characters.

Category: Conversational AI
Stage: Acquired
Employees: 259
HQ: Menlo Park, United States
Founded: 2021
Funding: $193M

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