2026 Summer AI/ML Engineer Intern

Dex is hiring a 2026 Summer AI/ML Engineer Intern in San Francisco, CA. Full brief — comp band, interview process, and hiring team — available to Employbl members.

Location: San Francisco, CA
Company size: 5–20
Posted: 1w ago
Via: Yc

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01Comp band & equity packageLocked
02Seniority & experience requirementsLocked
03Interview process & rubricLocked
04Hiring manager & team contextLocked
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2026 Summer AI/ML Engineer Intern · Dex

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Job title: 2026 Summer AI/ML Engineer Intern
Job location: San Francisco, CA, US
Job listing URL: https://www.ycombinator.com/companies/joindex/jobs/jgOpS9K-2026-summer-ai-ml-engineer-intern
Job description: # **2026 Summer Research Engineer Intern** Join us in pushing the boundaries of what's possible with LLMs and browser-native AI. You'll work on cutting-edge problems in agent systems, context handling, and tool use, while collaborating directly with our research team to bring novel approaches to production. ## **What You'll Build** * Browser agent and tool-calling multi-agent systems. * Evaluation frameworks for memory, efficiency, and accuracy. * Memory and personalization layer for workflows ## **Requirements** * Research or work experience with RL environments, LLMs, modern AI frameworks, and/or ML. * Experience with prompt engineering strategies. * Strong foundation in Python and TypeScript. ## **Sample Projects** * Designing and creating tool-calling environments to evaluate and benchmark agent systems * Agentic systems that predict and execute users’ next steps in complex workflows. * Mapping user paths on real world software to API functionality and action trajectories. * A searchable, self-updating memory store for continuously learning agents. * A system to interpret DOM snapshots, mouse click events, and keyboard inputs to select browser actions. * A context composer that feeds relevant info into LLM prompts based on user interactions, page content, and memory.

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Where this role is based

San Francisco, CA

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Dex headquarters

Company size

5–20 employees

Founded

2025

Total raised

$808,980

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Funding rounds

Pre Seed$500KMar 12, 2025
Equity Crowdfunding$159KJan 15, 2023
Pre Seed$150KAug 19, 2019