Senior Product Design Engineer — Remote & AI‑Driven

Lever, Inc.; Portugal; Remote; EUR 89,000 - 134,000; Full time

Benefits offered by this job

Competitive compensation

Equity

Fully remote

Async-first flexibility

Paid time off

Job summary

Lever, Inc. in Portugal is seeking a Senior Product Design Engineer to own core product surfaces from concept through production, uniting strong product design judgment with engineering rigor.

You will turn ideas and prototypes into production-ready components that are accessible, robust, and ready for engineers to use directly. You will prototype with AI tools like Claude Code, Cursor, and v0, build reusable primitives, and contribute to a shared design system in a remote, async environment

Qualifications

• Proven experience as a product designer who has evolved substantially into design engineering.
• Exceptional product design craft combined with strong frontend engineering skills in HTML, CSS, TypeScript, and React.
• Demonstrated ability to independently turn product and design concepts into polished, working implementations without relying on another engineer to make ideas production-ready.
• Strong experience designing and engineering custom UI components and primitives.
• Deep expertise in headless primitive composition, with experience using Base UI, Radix, or similar technologies; open-source component systems is a strong advantage.
• Strong understanding of motion design principles, including timing, easing, choreography, and value of animation.

Responsibilities

• Own core product surfaces from concept through production, including booking flows, scheduling primitives, and team and enterprise experiences.
• Translate product problems and hypotheses into high-quality designs, prototypes, and production-ready frontend components.
• Build and test working prototypes using modern AI-assisted development tools such as Claude Code, Cursor, and v0.
• Deliver components that product engineers can use directly, ensuring correct semantics, complete interaction states, accessibility, and production-quality implementation.
• Design, engineer, and maintain custom components and primitives rather than relying on generic third-party UI libraries.
• Continuously improve the shared component library by auditing existing primitives, identifying gaps, refining patterns, and contributing reusable components.
• Maintain consistency across tokens, spacing, states, dark mode, motion, and interaction patterns.
• Apply motion and animation thoughtfully to clarify interactions without adding unnecessary complexity.
• Own outcomes by framing hypotheses, defining success criteria, supporting implementation, and evaluating results.
• Maintain a high accessibility standard across all work, including keyboard navigation, focus management, semantics, contrast, and motion preferences.
• Refine details that elevate product quality, including empty states, error messaging, loading behavior, transitions, and other interaction nuances.
• Collaborate openly with product and design leadership, sharing work early and incorporating feedback in a remote async environment.
• Document design thinking and decisions through written documentation, prototypes, and recorded walkthroughs to support asynchronous collaboration.

Skills

Product design

Design engineering

Frontend engineering

HTML

CSS

TypeScript

React

Design systems

Accessibility

Motion design

AI tools

Open-source

Tools

Base UI

Radix

Open-source component systems

Job description

Lever, Inc. in Portugal is seeking a Senior Product Design Engineer to own core product surfaces from concept through production, uniting strong product design judgment with engineering rigor.

You will turn ideas and prototypes into production-ready components that are accessible, robust, and ready for engineers to use directly. You will prototype with AI tools like Claude Code, Cursor, and v0, build reusable primitives, and contribute to a shared design system in a remote, async environment