Full Stack Engineer (Frontend Leaning)

Eternos; Palo Alto (CA); On-site; USD 120,000 - 180,000; Full time

Job summary

Eternos, an innovative AI startup located in Palo Alto, is seeking a skilled frontend experience designer to craft world-class user interfaces. This foundational role will involve leading interface design and development of native iOS applications while collaborating within a dynamic in-person team. Candidates should possess a strong background in frontend development, design sensibility, and be proficient in modern programming languages and frameworks.

Benefits

Significant equity options

Professional development opportunities

Collaborative, in-person team environment

Qualifications

• 4+ years of frontend development experience with strong design sensibilities.
• Proficiency in Swift and iOS development.
• Expertise in modern frontend stacks like React, Vue, Angular.

Responsibilities

• Design and build stunning, intuitive user interfaces.
• Develop native iOS applications that showcase AI capabilities.
• Build responsive web applications maintaining design consistency.

Skills

Figma

Swift

iOS Development

React

Vue.js

Angular

Education

Bachelor's degree in Computer Science, Graphic Design, Interaction Design, or related field

Job description

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This range is provided by Eternos. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

$120,000.00/yr - $180,000.00/yr

About Us:

Eternos is an AI startup founded by Robert LoCascio in 2024, who was the previous Founder & Previous CEO at LivePerson. Eternos provides realistic AI replicas of individuals that allow people to preserve, share, and interact with their memories and knowledge in ways never seen before. In May 2024, Eternos was internationally recognized as the first to create a complete digital twin that included the highest-quality digital voice. Eternos recently closed a round of Tier one VC financing to expand our operations.

We believe the future of Artificial Intelligence will be Personal AIs. At Eternos, we start with you—your experiences, your voice, your story. The goal is simple but profound: You are your best AI. By using your own intelligence, perspective, and history as the foundation, you get the most context-rich, highly personalized AI possible—one that can help you solve life’s problems in ways no generic model ever could.

Our mission is simple: continue to create the MOST realistic AIs that support ALL personal and professional use cases. Our approach is distinct. We developed the Human Life Model (HLM)—a proprietary framework that defines all the requirements for AI that not only mirrors human behavior but evolves beyond it. The Eternos platform processes vast amounts of unstructured conversational, factual, and narrative data across formats.

Since launch, we’ve been featured in over 30 major media outlets including NBC, NPR, The New York Post, and CNET.

Company Culture

At Eternos.life, we're building the future of personal AI with interfaces that feel magical and intuitive. We value creativity, technical excellence, and user-centered design. As a fully in-person team, we believe in the power of direct collaboration, rapid prototyping, and immediate feedback loops.

We're looking for someone who thinks like a game designer but codes like an engineer – someone who can make complex AI feel simple and delightful.

About the Role

This is a foundational role within our organization to lead our frontend experience and user interface design. We are fully in-person located in the San Francisco Bay Area. We are building for the future!

In this role, you will have the opportunity to work on creating world-class user experiences that bring cutting-edge AI to life. You'll design and build interfaces that feel more like interactive games than traditional software, while developing native iOS applications that showcase the full potential of personal AI.

Responsibilities:

• UI/UX Excellence: Design and build stunning, intuitive user interfaces. You are a Figma power user.
• Native iOS Development: Deep experience across the Swift and iOS programming landscapes.
• Interactive Design: You have a unique toolkit of contemporary (2025) design languages and frameworks. You do not rely on Adobe tools or commodity JS libraries. For instance, you use GSAP.
• Cross-Platform Development: Build responsive web applications using modern frontend frameworks while maintaining design consistency across platforms.
• Asset Repository Creation and Maintenance: Establish and maintain comprehensive repositories of design assets that are composable across platforms and interfaces.
• Quality Assurance: Experience with hands-on QA.

Qualifications:

Required:

• Bachelor's degree in Computer Science, Graphic Design, Interaction Design, Human-Computer Interaction, or related field, or foreign equivalent
• 4+ years of frontend development experience with strong design sensibilities
• Open to applicants with undergraduate degrees from Art Schools with exceptional portfolios and coding skills.
• Swift & iOS Development: Proficiency in Swift and iOS development, with experience shipping native iOS applications
• Game-Quality Design Skills: Demonstrated ability to create visually stunning, interactive interfaces that feel engaging and intuitive
• Modern Frontend Stack: Expertise in React, Vue, or Angular, along with TypeScript, HTML5, and CSS3
• Animation & Interaction: Showing a portfolio here will enhance your candidacy, but is not required.
• User-Centric Mindset: Common sense.

Preferred:

• Background in game design, game development, or interactive media
• Experience with 3D graphics, WebGL, or interactive visualizations
• GSAP experience
• Web Assembly experience

Technical Skills We Value:

• Frontend Frameworks: React, Vue.js, Angular, Typescript
• Mobile Development: Swift, SwiftUI, iOS SDK, XCode
• Styling & Animation: Advanced CSS, SASS/SCSS, CSS-in-JS, Framer Motion, Lottie
• Build Tools: Webpack, Vite, or similar bundling tools
• Version Control: Git workflows and collaborative development practices
• Testing: Unit testing, integration testing, and end-to-end testing frameworks

What We Offer:

• Competitive salary range of $120k - $180k based on experience
• Significant equity options in a fast-growing company
• Opportunity to design the future of AI user interfaces
• Collaborative, in-person team environment in Palo Alto
• Direct impact on product development and user experience
• Professional development and learning opportunities in cutting-edge design and development
• Technology, Information, and Internet

Employment Type

• Full Time

Eternos.life is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate on the basis of race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by law. We also comply with applicable fair chance laws in various locations.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  Technology, Information and Internet

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