UI Framework Engineer

Morph Systems | Mountain View, California, United States | Today

full-time | on-site | senior | 4–7 years

skills: typescript, javascript, rust, c++, python, react, lit, vue, svelte, ui framework development, schema-driven ui, design systems, abstract syntax tree, babel, swc, compiler design, programming language theory, webgl, canvas, low-level rendering, skia, llms for code generation, automated refactoring, developer infrastructure, ai-native ui framework, domain specific languages, code generation, frontend systems, compiler theory, generative ai, virtual dom, reconcilers, browser rendering engines, state management

apply →

Senior UI Framework Engineer (AI-Native Systems)

About the Job At Morph Systems, we’re reimagining software engineering for a world where most code is written by large language models (LLMs). Our mission is to build the developer infrastructure of the future an autonomous full-stack AI developer and the underlying platform.

The next frontier for Morph is the UI Layer. We aren't just building another component library; we are building an AI-native UI framework designed from the ground up to be "hallucination-resistant," structurally deterministic, and visually stunning. If you’ve ever wanted to design the visual language that AI will use to build the world's next billion applications, you’ll feel right at home here.

Role Overview We’re looking for a UI Framework Engineer with a deep systems mindset to architect the visual engine of our LLM-powered development stack.

In this role, your "customer" is our AI agent. You will design and extend our proprietary UI framework so that it is optimized for AI generation. You will work at the intersection of frontend systems, compiler theory, and generative AI to ensure that when our AI writes a UI, it is performant, accessible, and follows modern design principles by default.

What You’ll Do

Design the AI-Native UI DSL: Architect and extend our proprietary UI framework and Domain Specific Languages (DSLs) to be easily "understandable" and "writable" by LLMs.
Bridge AI and UI: Collaborate with our AI researchers to optimize our code-generation stack, ensuring the models can reason about layout, state, and styling with high precision.
Architect for Correctness: Build systems that enforce structural correctness at the framework level, minimizing the surface area for AI-generated "UI bugs" or layout shifts.
Modern UI Capabilities: The framework should support cutting-edge UI features (complex animations, responsive primitives, and advanced state management) so the AI can implement and deploy them effortlessly.
Internal Tooling: Develop "UI Compilers" or linters that provide real-time feedback to the LLM during the generation process to ensure output quality.
Systemic Design: Work with product designers to codify design systems into programmatic constraints that the AI can navigate.

Qualifications

Must-Have:

4–7 years of experience in software engineering, with a heavy focus on UI internals or framework development.
Deep expertise in the "internals" of modern UI stacks (React, Lit, Vue, Svelte, or custom rendering engines).
Strong knowledge of TypeScript/JavaScript and at least one systems language (Rust, C++, or Python).
Experience building Schema-driven UI or Design Systems where the UI is generated from data/metadata.
A "Systems" approach to frontend: You don't just use libraries; you understand how the virtual DOM, reconcilers, and browser rendering engines work.
Ability to design and ship independently in ambiguous, fast-moving environments.

Nice-to-Have:

Experience with AST (Abstract Syntax Tree) manipulation or building custom Babel/SWC plugins.
Background in Compiler Design or Programming Language (PL) theory.
Experience with WebGL, Canvas, or low-level rendering (e.g., Skia).
Previous experience working with LLMs for code generation or automated refactoring.

Who You Are

A UI Systems Thinker: You view a UI not as a collection of divs, but as a formal system of constraints and state.
An Architect of Abstractions: You love finding the "cleanest" way to represent complex visual logic so that even a machine can write it perfectly.
Obsessed with Polish: You have a high bar for modern UI/UX and believe that AI-generated software should look better than human-written software.
First-Principles Builder: You’ve probably built your own UI library, a custom CSS-in-JS engine, or a state management tool because you weren't satisfied with the status quo.

Why Morph

Join a mission-driven startup defining the next frontier of AI-driven software engineering.
Work with a small, world-class team that values technical depth and creative problem-solving.
Competitive compensation and equity package.
On-site culture in Mountain View, CA, working hands-on with the founders and engineers shaping this space.

At Morph, we’re not just writing code, we’re building the systems that will teach AI how to code. If that excites you, we’d love to meet you.

Benefits

competitive compensation · equity package

Get new builder jobs daily: