Portal (SPC F25) · 8 hours ago
Founding Product Engineer (Full Stack)
San Francisco Bay Area
Full-time
Onsite
Mid, Senior LevelPortal is a company that allows users to try real software instantly through a live, isolated browser environment. They are seeking a Founding Product Engineer to work with the founding team to enhance user interactions with their product, focusing on creating a seamless experience between AI-led and human-led interactions.
Computer Software
Responsibilities
Designing and refining AI agent demos in watch mode (AI-led, guided experiences)
Designing and refining play mode (hands-on exploration with guardrails)
Making transitions between guided → hands-on feel seamless
Building and polishing the Portal editor Improving clarity, feedback, and failure states
Integrating LLMs as a guide, not the main attraction
Shipping features, watching real users use them, iterating quickly
Qualification
Required
Strong focus in one of: frontend (React, Typescript), backend (Python, Node), Browser Agents (Chromium, Computer Use, evals, UX, security), real-time streaming (WebRTC, NoVNC, latency)
Strong full-stack fundamentals
Comfort with ambiguity and early-stage tradeoffs
Good judgment around user trust and constraints
Commute to this job's location
Preferred
Love diving into new AI coding tools & releases
Early-stage / 0→1 experience
Design sensibility
Benefits
Meaningful equity
Company
Portal (SPC F25)
Portal is the only AI agent that can both give a live demo of your product to prospects 24/7, and guide them through actually using it, in a real, hands-on, stateful sandbox.
0-1 employees
Funding
Current Stage
Early StageCompany data provided by crunchbase