Summer 2026 Full-Stack Engineer Intern

Dex is hiring a Summer 2026 Full-Stack 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
05Growth trajectory in this roleLocked
06Offer & decision timelineLocked

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Summer 2026 Full-Stack Engineer Intern · Dex

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Job title: Summer 2026 Full-Stack Engineer Intern
Job location: San Francisco, CA, US
Job listing URL: https://www.ycombinator.com/companies/joindex/jobs/xgLbSux-summer-2026-full-stack-engineer-intern
Job description: # **Full-Stack Engineer Intern** We're looking for engineers who can turn research prototypes into production-ready systems. You'll work at the intersection of browser automation, agent infrastructure, and intuitive UX that make complex agent behavior understandable and controllable. Preferred: History of high-achieving projects/work experience, open source contributions, or competitive math/cs/physics experience. ## **What You'll Do** * Full-stack browser extension interfaces based on research prototypes. * End-to-end features using React/Next.js, Python, and SQL. * Design intuitive interfaces for how users should delegate and override AI actions. * iMessage, communications channels, desktop-native, wearables integrations ## **Requirements** * Strong foundation in React/Next.js and TypeScript. * Experience building and shipping complex web apps and/or browser extensions. * Familiarity with design systems like Figma * Preferred: Proof of meaningful open-source contribution. * Preferred: Strong UI/UX or design portfolio. ## **Sample Projects** * Reusable tool call and output components for LLM-generated responses. * Building efficient indexing, search, and memory layer architecture. * Developing security and guardrails to approve and deny agent requests. * Integrating third-party platforms (e.g. Slack, Notion, Gmail) to enable workflows.

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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