Pasito (YC S22) - Fullstack engineer UI

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mid

$80k–$110k

H1B: no

Silver Fullstack Engineer UI at Pasito builds core product experiences focusing on sophisticated, state-rich user interfaces and AI-native workflows. The role includes ownership of complex UI systems, collaboration with cross-functional teams, and defining UI architecture in a regulated industry.

Responsibilities

We’re looking for a UI-heavy, product-focused Fullstack Engineer to help us build the core product experiences that power Pasito’s AI workspace.
We’re specifically looking for someone whose strength is building sophisticated, state-rich user interfaces, and who can operate across the stack as needed to deliver those experiences end-to-end.
You’ll work closely with Product and Design, take deep ownership of complex UI systems, and help define how AI-native software should feel in a regulated, high-impact industry.
As an early member of the engineering team, you’ll have real ownership and influence: shaping UI architecture, setting quality standards, and delivering mission-critical experiences for highly engaged clients.
Own complex, state-rich UI systems
Design and build rich editing and collaboration experiences using ProseMirror / Tiptap and Yjs, with a focus on correctness, performance, and excellent UX.
Build AI-native product experiences
Integrate AI and LLM-powered workflows directly into the UI - especially within rich-text, data-dense, and collaborative environments.
Collaborate cross-functionally
Work closely with Product, Design, Sales, and Client teams to understand real customer workflows and translate them into durable product solutions.
Continuously improve systems
Refine existing patterns, challenge assumptions, and help define what “great” looks like as the product and team scale.

Qualification

A UI-firstExperienced with TypeScriptWhat’s In It For YouMeaningful ownership

Required

A UI-first, product-driven engineer with 3+ years building complex web applications
You care deeply about interaction quality, performance, and building interfaces that feel intuitive and trustworthy
You’re comfortable operating across the stack, with strength in frontend and user-facing systems
You enjoy close collaboration with product managers and designers
Technical Experience We’re Excited About
Deep expertise building rich UI editors using ProseMirror / Tiptap
Experience building real-time collaboration and local-first applications using Yjs
Experienced with TypeScript, Node.js, and modern frameworks like Next.js
Hands-on experience integrating AI / LLM-powered workflows (e.g., ChatGPT or Claude) into user-facing products
Strong familiarity with frontend testing tools and best practices
What’s In It For You
Meaningful ownership: Build foundational systems used by carriers, brokers, employers, and employees at scale