AI systems that invoke external APIs, search engines, or code interpreters during inference, extending capabilities beyond raw LLM generation. The foundational capability behind most agentic products.
Primary AI lifecycle stage: agents.
As of today, 1,238 active AI roles across 193 companies in our index reference Tool use. Hiring concentrates at the agents (94%) and application (2%) stages. Most common sectors: Enterprise, Big Tech, AI Frontier.
AI systems that invoke external APIs, search engines, or code interpreters during inference, extending capabilities beyond raw LLM generation. The foundational capability behind most agentic products. Primary AI lifecycle stage: agents.
1,238 active AI roles across 193 companies in our index reference Tool use as of today.
The companies with the most active Tool use listings are: JPMorgan Chase (80 roles), Salesforce (64 roles), Amazon (51 roles), Adobe (49 roles), Google (44 roles).
Tool use primarily belongs to the agents stage of the AI lifecycle. In current hiring, Tool use roles concentrate at: agents (94%), application (2%).
The sectors with the most active Tool use hiring are: Enterprise, Big Tech, AI Frontier.
54 AI roles tagged tool_use.
| Company | Title | Sector | AI score | Other tags |
|---|---|---|---|---|
| OpenAI | Researcher, Context - Agent Post-Training | AI Frontier | 10 | RL post-training · Agent research · Evals · Synthetic data · Agent orchestration · LLM observability |
| OpenAI | Researcher, Connectors - Agent Post-Training | AI Frontier | 10 | RL post-training · Agent orchestration · Evals · Fine-tuning · Model serving · Agent research |
| OpenAI | Researcher, Loss of Control | AI Frontier | 10 | Agent orchestration · Evals · Guardrails · LLM observability · Agent research |
| Anthropic | Research Engineer, Machine Learning (Reinforcement Learning) | AI Frontier | 10 | Agent orchestration · Evals · RL post-training · Frontier research · Code gen |
| Anthropic | Research Engineer, Frontier Red Team (Autonomy) | AI Frontier | 10 | Agent orchestration · Evals · Guardrails · Embodied AI · RL robotics · Agent research |
| Anthropic | Research Engineer, Machine Learning (Reinforcement Learning) | AI Frontier | 10 | RL post-training · Agent orchestration · Agent research · Frontier research · Code gen · Inference infra · Model serving |
| Staff Software Engineer, AAI Research | Big Tech | 9 | Agent orchestration · Agent research · RAG · Evals · Fine-tuning | |
| OpenAI | Researcher: Agent Post-Training, API & Power-Users | AI Frontier | 9 | RL post-training · Agent orchestration · Evals · Fine-tuning · Model serving |
| Anthropic | Research Scientist, Life Sciences | AI Frontier | 9 | Agent orchestration · Evals · Fine-tuning · RL post-training |
| Research Scientist, Frontier Health, DeepMind | Big Tech | 9 | Agent orchestration · Multimodal · RL post-training · Reward modeling · Evals · Vision · Audio & speech | |
| NVIDIA | Senior Data Scientist - Security and Networking Research | Semiconductors | 9 | Agent orchestration · RAG · Evals · Fine-tuning · Model serving · Inference infra · Multimodal · Synthetic data |
| Research Scientist, Stitch | Big Tech | 9 | Agent orchestration · Evals · Synthetic data · Agent research · Fine-tuning · RL post-training | |
| Research Scientist/Engineer, Autonomous Security, DeepMind | Big Tech | 9 | Agent orchestration · Evals · Guardrails · Fine-tuning · RL post-training · Agent research | |
| Microsoft | Research Science PhD Internship Opportunities - Coding Agents | Big Tech | 9 | Agent orchestration · Code gen · LLM observability · Evals · Agent research |
| Amazon | Applied Scientist, RL post-training, AWS | Big Tech | 9 | RL post-training · Fine-tuning · LLM observability |
| GE Healthcare | Staff AI Scienitist | Healthcare | 9 | Agent orchestration · Fine-tuning · RAG · LLM observability · Guardrails · Evals · Multimodal · Agent research · Frontier research · Model serving |
| GE Healthcare | Staff AI Scientist | Healthcare | 9 | Agent orchestration · Evals · Guardrails · LLM observability · RAG · Fine-tuning · Model serving · Agent research · Multimodal |
| Amazon | Applied Scientist - Agentic AI, Amazon Fulfillment Technology | Big Tech | 9 | Agent orchestration · Fine-tuning · RL post-training · Evals · LLM observability · RAG · Vector DB · Agent research |
| Booking | Senior Machine Learning Scientist | Hospitality | 9 | Agent orchestration · Agent research · RAG · LLM observability · Evals |
| NVIDIA | Developer Relations Manager, Higher Education and Research - AI Agents | Semiconductors | 9 | Agent orchestration · Agent research · Evals · LLM observability · RAG · Multimodal · Embodied AI |
| Snorkel AI | AI Advocate, Open-Source & Research | Data AI | 9 | Evals · Fine-tuning · RL post-training · Agent research · Agent orchestration · Frontier research · LLM observability |
| Microsoft | Research Intern - AI Agents & Efficiency | Big Tech | 9 | Agent orchestration · Agent research · Multi-agent · Inference infra · Model serving |
| Microsoft | Principal Applied Scientist | Big Tech | 9 | Agent orchestration · Agent research · LLM observability · RAG · Vector DB · Fine-tuning |
| DoorDash | AI Research Fellowship, (Summer and Fall 2026) | Consumer | 9 | Agent orchestration · Evals · Forecasting · Multimodal · Vision · Audio & speech · Frontier research · Synthetic data |
| NVIDIA | Senior Applied Researcher, AI Agentic Systems | Semiconductors | 9 | Agent orchestration · RAG · LLM observability · Evals |
| NVIDIA | Senior Applied AI Researcher, Digital Biology | Semiconductors | 9 | Agent orchestration · Multimodal · LLM observability · Fine-tuning · Inference infra · Model serving · Frontier research · Interpretability · Code gen |
| OpenAI | Researcher, Agentic Post-Training | AI Frontier | 9 | RL post-training · Agent orchestration · Multi-agent · Evals · LLM observability · Fine-tuning |
| Eli Lilly | Advisor - Agent Research | Pharma | 9 | Agent orchestration · Model serving · Inference infra · RAG · Fine-tuning |
| Microsoft | Research Intern - AI Frontiers - Reasoning & Agentic Models | Big Tech | 9 | Agent orchestration · Agent research · Frontier research · Multimodal · Pretraining · Fine-tuning · RL post-training |
| Tempus AI | Senior Scientist II, Applied Machine Learning and Translational Agentic AI, Life Science R&D | Vertical AI | 9 | Agent orchestration · Multimodal · LLM observability · RAG · Fine-tuning · Model serving |