Founding Engineer

Dex is hiring a Founding Engineer 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

Section II · Full ProfileFree with an account

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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Founding Engineer · Dex

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Job title: Founding Engineer
Job location: San Francisco, CA, US
Job listing URL: https://www.ycombinator.com/companies/joindex/jobs/qYNyl01-founding-engineer
Job description: We're creating the third layer of interaction — a personalized AI action layer that lives across all your workflows. If that excites you, and you’re a world-class infrastructure expert, please apply. ## Why Dex Matters * Flow is everything. Every tab switch, every UI reload, every wait for an AI handoff kills momentum. * The future of productivity is collaborative AI. Dex is an active, real-time partner embedded directly in your browser—the place where your work actually lives. * Context makes or breaks a product. You need systems that understand where you are, what you're doing, and what should happen next. ## What You'll Build * Core agent components, including memory stores, context compression, inter-agent protocols, planning and tool use. * High performance state management and real-time UI observation systems. * Scalable infrastructure for browser-native AI. ## Requirements * Expert in React/Next.js, TypeScript, and Python. * Deep browser internals experience. * Proven rapid prototype to production track record. * Preferred: Prior experience with AI/ML infra or agentic systems. ## Sample Projects * Translating browser inputs (voice, keyboard and mouse inputs, tab changes, DOM) into actionable workflow graphs. * Agentic systems that predict and execute users’ next steps in complex workflows. * A searchable, self-updating memory store for personalized user flow paths.

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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