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Staff / Principal Research Scientist - UK

Inworld AIUKScience
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Salary
£140K - £200K GBP
Job type
Full-time
Posted
18 Mar 2026
Status
Open · checked 7d ago

About this role

Inworld AI is hiring a full-time Staff / Principal Research Scientist in the UK to advance real-time artificial intelligence systems for consumer applications. This position suits experienced practitioners and researchers who excel in ambiguous environments, enjoy full-stack research ownership, and want to ship impactful technology.

Role Overview

The Staff / Principal Research Scientist role is based in the United Kingdom within the Science department at Inworld AI. This position focuses on driving innovation in foundation models, evaluation loops, and frontier topics such as agents and multimodal models. The organization values professionals who can navigate unclear problems, design experiments, and bring practical solutions from initial concept to production.

Key Responsibilities

Own the full-cycle research process by framing fundamental questions, running experiments, writing papers, and shipping results.
Build and test foundation models, working with new architectures, reinforcement learning, reward modeling, and scaling.
Design evaluation loops, benchmarks, quality measurement frameworks, and LLM-as-judge methodologies.
Explore frontier artificial intelligence topics, including multimodal models, autonomous agents, tool use, test-time compute, and world models.
Conduct rigorous failure analysis and iterate rapidly on real-time AI workloads.

Requirements

Background in machine learning, natural language processing, or equivalent practical experience demonstrated through tangible achievements.
Experience across foundation models, evaluation strategies, or published research in top-tier venues like NeurIPS, ICML, ICLR, EMNLP, ACL, or AAAI.
Track record of public work, such as non-trivial artificial intelligence side projects, interdisciplinary experiments, or open-source contributions.
Legal right to work in the United Kingdom, as visa sponsorship is unavailable for this specific UK-based opening.

Skills and Tools

Large Language Models (LLM)
Natural Language Processing (NLP)
Reinforcement Learning
Foundation Model Architectures
Evaluation and Benchmarking Frameworks

Salary and Benefits

Base salary range of £140,000 to £200,000 per year.
Total compensation package including equity and comprehensive benefits.
Compensation is determined based on work location, level, competencies, and business needs.

About the Company

Inworld AI operates as a research lab and inference provider specializing in real-time artificial intelligence for consumer applications. The enterprise builds first-party speech models, serves large language models, and manages high-volume inference APIs utilized across education, healthcare, fitness, and media. Backed by prominent venture capital firms and investors, Inworld AI empowers applications for major global technology companies and has been recognized among the top startup organizations globally.

How to Apply

Candidates should visit the official Inworld AI careers page to submit their application and share links to relevant projects they have built.

Skills and tech stack

LLMNLP

Questions candidates ask

What is the location of the Staff / Principal Research Scientist role?

This position is based in the United Kingdom.

What is the salary range for this position?

The base salary ranges from £140,000 to £200,000 per year, supplemented by equity and benefits.

Is visa sponsorship available for this UK role?

No, candidates must already possess the legal right to work in the United Kingdom as visa sponsorship is not offered for this position.

What core technical areas does the role focus on?

The role concentrates on Large Language Models, Natural Language Processing, foundation model training, evaluation loops, and frontier topics like autonomous agents.

How should interested candidates apply?

Candidates can apply directly through the official Inworld AI careers page.

Ready to apply?

The application is on the official Inworld AI careers page.

Apply on company site