Staff / Principal Research Scientist - USA
- Pay
- $270,000 – $500,000 per year
- Location
- Mountain View, CA (Remote) · On-site
- Job type
- Full-time
- Level
- Lead / Staff
- Education
- Doctorate
- Listed
- 23 days ago
Skills & highlights for this role
- ML model training
- evaluation methodology
- LLM-as-judge
- reinforcement learning
Who We're Looking For
A year ago, reliably working agentic systems barely existed. Nobody has a decade of experience here. So we're not screening for a resume template - we're looking for strong people from varied backgrounds who learn fast, thrive in ambiguity, and can show us what they've built, broken, and understood.
Experience We Find Useful
You don't need all of this. But you need enough to make a case.
- Foundation models: training, new architectures, RL, reward modeling, scaling
- Evaluation: benchmarks, eval loops, quality measurement, LLM-as-judge, failure analysis
- Frontier topics: multimodal models, agents, tool use, test-time compute, world models
- Published research at ICML, ICLR, NeurIPS, EMNLP, ACL, or AAAI
- PhD in ML/NLP - or equivalent practical experience you can point to
- Public work: non-trivial AI side projects, interdisciplinary experiments, open-source contributions
- Full-stack research ownership: you frame the question, run the experiments, write the paper, ship the result
Additional information
If you learned through building, competitions, or collaborations outside academia, that counts. We care about evidence, not credentials.
Who Thrives Here
- You don’t need a roadmap to start walking; you’re comfortable picking a direction and building the map as you go
- You believe research isn't finished until it’s shipped. You have a bias for impact over purely academic output
- You don't just ship code; you obsess over the why. You’re the first to question an approach if you think there’s a better way to solve the core problem
- You aren't satisfied with "the PM said so." You thrive on deep context and want to understand the fundamental logic behind every decision we make
What Working Here Is Like
We hand you unclear problems and expect you to make them clear. We value researchers who say "I don't know yet" and then design the experiment that finds out. We treat evaluation as a first-class research product, not a box to check before launch. Impact comes before publications though we support sharing work that moves the field forward. Your work should be visible. Flat structure, fast iterations, minimal process theater.
We believe in the power of in-person collaboration to solve the hardest problems and foster a strong team culture. We offer relocation assistance and look forward to you joining us in our Mountain View office.
Pay and benefits
The base salary range for this full-time position is $270,000 - $500,000+ bonus + equity + benefits.
Inworld Jobs Privacy
About Inworld
Inworld is a research lab and inference provider focused on realtime AI for consumer-facing applications. We build first-party speech models, serve LLMs, and run the inference behind modular APIs designed for high-volume, realtime workloads.
Hundreds of millions of users interact with Inworld powered apps every day and we serve over 10 trillion LLM tokens per month. Our models and infrastructure support consumer applications across companions, healthcare, fitness, education, media, and more. Our work spans model research, realtime inference, large-scale serving infrastructure, and the APIs developers use to bring these capabilities into production.
We’ve raised more than $125M from Lightspeed Venture Partners, Section 32, Kleiner Perkins, Microsoft’s M12 venture fund, Founders Fund, Meta, Stanford, and others. Our technology has powered experiences from companies including NVIDIA, Microsoft Xbox, Niantic, Logitech Streamlabs, Wishroll, Little Umbrella, and Bible Chat. Inworld has also been recognized by CB Insights as one of the 100 most promising AI companies globally and named one of LinkedIn’s Top 10 Startups in the USA.
From Inworld's careers page, first listed on Rolev.ai on October 17, 2026. Rolev.ai is not the employer.
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Common questions
What is the salary for the Staff / Principal Research Scientist - USA role at Inworld?
The Staff / Principal Research Scientist - USA posting at Inworld states compensation of $270,000 – $500,000 per year. It is listed as a full-time position. Final pay may depend on location, experience, and interview evaluation on Inworld's official career site.
Where is the Staff / Principal Research Scientist - USA job at Inworld located?
Yes, this Staff / Principal Research Scientist - USA opening at Inworld is listed as Mountain View, CA (Remote) (On-site). Always check Inworld's application page for specific state eligibility or relocation policies.
What qualifications are required for Staff / Principal Research Scientist - USA at Inworld?
For the Staff / Principal Research Scientist - USA role, Inworld highlights a doctorate; experience with ML model training, evaluation methodology, LLM-as-judge, reinforcement learning. Rolev.ai can score your existing resume against these requirements and show any skill gaps before you apply.
How do I apply for the Staff / Principal Research Scientist - USA position at Inworld?
This listing links directly to Inworld's Ashby application page. You can apply directly on Inworld's site, or use Rolev.ai to check your resume fit, generate a zero-hallucination tailored resume and cover letter for this posting, and autofill the Ashby application form in 1 click with the Rolev.ai Chrome extension. You always review the form and press Submit yourself.