United States
Palo Alto, CA
Join 39 AI
Build warmer, more expressive AI products with us.
We're looking for people who are excited about AI, product, and creation - and want to build the next generation of AI products with us.
Locations
Japan
Tokyo
Global
Remote
Company Introduction
39 AI Inc. is a Bay Area-founded, AI-native startup building more natural and emotionally resonant AI product experiences. We explore more authentic, expressive, and companion-like ways for people and AI to connect.
Our current products include the AI audio product FishAudio, AI chat products, and several new AI product directions still in incubation. The team is flat, direct, and fast-moving. We encourage people to speak up, own ideas, and turn them into shipped work quickly.
The team is young, sincere, relaxed, and creator-minded, with a strong anime, comics, and gaming culture, and deep creator roots. We do not set limits around degrees, compensation, equity incentives, office location, or growth paths. We are looking for people who are deeply excited about AI, products, creation, and new things to explore the next generation of AI products with us.
Benefits & Culture
What we offer
We care about speed, craft, and giving people the support they need to do their best work.
Visa sponsorship
We sponsor on a case-by-case basis depending on role and location. Your recruiter will walk through the details on the first call.
We ship fast
Voice AI is moving in weeks, not quarters. We hold a high bar on quality and design and we still ship faster than anyone in the category.
We back each other
Open, direct, low-ego culture. We tell each other the truth and we make each other better.
Highly Competitive Compensation
Highly competitive base salary and meaningful equity.
Health coverage
Platinum medical, dental, and vision coverage.
Office meals
Daily lunch and dinner in office.
Unlimited PTO
Unlimited PTO.
Best-in-class setup
Best-in-class hardware.
Careers
Open Roles
Brand and Creative Designer
Own visual direction and creative execution across campaigns, launches, social media, product visuals, and the long-term brand system.
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Voice Acquisition & Quality Lead
Own the quality bar, acquisition pipeline, and catalog curation for natural-sounding voices on Fish Audio.
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AI Systems Engineer
Design and optimize high-performance algorithm engines for in-house large model development and real-world AI applications.
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GPU Infrastructure SRE
Own the reliability and operations of large-scale GPU infrastructure for model training and production inference.
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Voice Agent Platform Engineer
Build the architecture, engine, SDKs, and product surfaces for Fish Audio's open realtime voice Agent platform.
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Full-Stack Engineer
Own the full path from database design, APIs, and web frontends to deployment, directly taking AI products from zero to one.
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Solution Engineer
Support B2B client onboarding, third-party vendor integrations, and hands-on technical issue resolution across external systems and our internal platform.
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Sr Business Development Representative
Own pipeline generation for Fish Audio, reaching technical founders, product leaders, engineering teams, and enterprise buyers building with voice AI.
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