About the role#
ThirdLayer is looking for an AI Engineer Intern to join our team in San Francisco. You will work on agent systems, context handling, and tool use. This role involves collaborating with our research team to bring new approaches into production. This is a full-time, paid, on-site position.
What you'll do#
- Build browser agent and tool-calling systems.
- Create evaluation frameworks to measure agent performance.
- Develop memory and personalization layers for workflows.
- Predict and execute user steps within complex workflows.
- Design interfaces for users to delegate or override AI actions.
- Interpret DOM snapshots, mouse clicks, and keyboard inputs to select browser actions.
- Build context composers that feed information into LLM prompts based on user interactions.
What you'll need#
- Research or work experience with LLMs, modern AI frameworks, or machine learning.
- Experience using prompt engineering strategies.
- A strong foundation in Python and TypeScript.
- Currently pursuing a degree in Computer Science or Computer Engineering.
Location & details#
- Location: San Francisco, California.
- Modality: On-site.
- Term: Rolling.
- Note: Sponsorship is not available for this role.
About ThirdLayer
ThirdLayer builds infrastructure for enterprise agents. The company focuses on continual learning systems that use organizational context to improve outcomes. Founded in 2025, the business operates out of San Francisco. It employs eight people.
How to get in at ThirdLayer
Applying to ThirdLayer early provides a distinct advantage because smaller teams review applications as they arrive. Intern Insider sends an instant alert the moment a role matching your target is published, helping you apply among the first before the candidate pile grows. You gain a better chance at being seen by the hiring team. Reaching out to the recruiter directly often improves your response rates compared to submitting into a queue. Intern Insider surfaces the recruiters behind ThirdLayer roles so you can contact them to ask about the position or a potential referral. This direct approach shows you are serious about the work.
