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Software Engineer, Machine Learning Infrastructure
Character.AI provides personalized AI interactions through customizable AI characters for entertainment, learning, and creative tasks.
Benefits:
Top-notch health coverage
401(K) contribution
Paid leave (up to 20 weeks)
4 weeks PTO
Daily in-office catering & monthly Doordash stipend
Experience Requirements:
4+ years of experience supporting the infrastructure within an ML environment
Other Requirements:
Experience in developing tools used to diagnose ML infrastructure problems and failures
Experience with cloud platforms (e.g., Compute Engine, Kubernetes, Cloud Storage)
Experience working with GPUs
Responsibilities:
Provide infrastructure support to our ML research and product
Build tooling to diagnose cluster issues and hardware failures
Monitor deployments, manage experiments, and generally support our research
Maximize GPU allocation and utilization for both serving and training
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Research Engineer, Post-Training (All Industry Levels)
Character.AI provides personalized AI interactions through customizable AI characters for entertainment, learning, and creative tasks.
Benefits:
Top-notch health coverage
401(K) contribution
Paid leave (up to 20 weeks)
4 weeks PTO
Daily in-office catering & monthly Doordash stipend
Education Requirements:
at least PhD (or equivalent) research experience
Other Requirements:
Write clear and clean production-facing and training code
Experience working with GPUs (training, serving, debugging)
Experience with data pipelines and data infrastructure
Strong understanding of modern machine learning techniques (reinforcement learning, transformers, etc)
Track-record of exceptional research or creative applied ML projects
Responsibilities:
Develop alignment algorithms and loss functions
Write data pipelines to process diverse web data
Identify quality signals to understand our model’s performance
Design sampling algorithms to improve serving efficiency
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Research Engineer, Multimodal (All Industry Levels)
Character.AI provides personalized AI interactions through customizable AI characters for entertainment, learning, and creative tasks.
Benefits:
Top-notch health coverage
401(K) contribution
Paid leave (up to 20 weeks)
4 weeks PTO
Daily in-office catering & monthly Doordash stipend
Education Requirements:
preferably 2+ years of industry experience
Other Requirements:
Deep understanding of the “whole stack” when it comes to designing, training, evaluating and deploying machine learning models
Have a track record of successfully owning projects from start to finish
Have experience with generative models for various modalities
Experience working with proven tools
Experience working with diffusion models
Responsibilities:
Determining the type of training data we need
Developing new model architectures
Creating new evaluations
Writing fast inference algorithms
Working with product teams to integrate feedback mechanisms into the product
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Staff Software Engineer, Applied ML
Character.AI provides personalized AI interactions through customizable AI characters for entertainment, learning, and creative tasks.
Benefits:
Top-notch health coverage
401(K) contribution
Paid leave (up to 20 weeks)
4 weeks PTO
Daily in-office catering & monthly Doordash stipend
Education Requirements:
B.A.S. in Computer Science or equivalent experience
Experience Requirements:
5+ years of industry experience
Other Requirements:
Experience building/consuming RESTful and gRPC based web-services
Experience building and managing infrastructure in a cloud environment (GCP, AWS or Azure)
Familiar with one of the popular ML Frameworks like Pytorch, Tensorflow
Experience writing highly performant service in a modern typed language
Experience configuring and maintaining CI/CD pipelines and automated testing
Responsibilities:
Work cross functionally with product, data science, data platform and ML researchers
Identify, design and implement the applied ML infra
Lead implementation of our ML backend systems
Support scaling our existing systems
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Founding Backend & Applied AI Engineer
AI-powered contract review tool integrated with Microsoft Word, offering real-time suggestions, redlining, and more.
Benefits:
Competitive salary
Equity
Remote work option
Experience Requirements:
3+ years of experience
Responsibilities:
Develop and maintain backend infrastructure
Build and improve AI models
Work with frontend engineers to integrate AI features
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Founding Frontend Engineer
AI-powered contract review tool integrated with Microsoft Word, offering real-time suggestions, redlining, and more.
Benefits:
Competitive salary
Equity
Remote work option
Experience Requirements:
3+ years of experience
Responsibilities:
Develop and maintain frontend infrastructure
Work with backend engineers to integrate AI features
Improve user experience
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