Senior Product Design Engineer

Jobgether SRL; Brasil; On-site; BRL 180,000 - 250,000; Full time

Job summary

Lever, Inc. is seeking a Senior Product Design Engineer in Brazil. You will own core product surfaces end-to-end, turning ideas into production-ready components with a strong focus on accessible, robust frontend implementations.

You’ll work across product design, frontend engineering, design systems, and interaction design, building reusable primitives and contributing to an open-source component library. Remote-first with async collaboration.

Qualifications

• Proven experience as a product designer evolved into design engineering with ownership of complex product areas.
• Strong craft in product design coupled with frontend engineering in HTML, CSS, TS, and React.
• Ability to turn concepts into polished, production-ready frontend components independently.
• Experience building and maintaining design systems and reusable primitives.
• Deep expertise in headless primitive composition with modern tooling.
• Strong understanding of motion design, accessibility, and browser-native platform primitives.
• Knowledge of APIs and data models underpinning product experiences.

Responsibilities

• Own core product surfaces from concept through production, including booking and scheduling experiences.
• Translate problems into high-quality designs, prototypes, and production-ready components.
• Build and test prototypes using AI-assisted tools like Claude Code, Cursor, and v0.
• Deliver components for product engineers with correct semantics and accessibility.
• Maintain and evolve a design system with consistent tokens, spacing, and states.
• Collaborate openly with product and design leadership and document decisions for async collaboration.

Skills

Design engineering

Frontend engineering

HTML

CSS

TypeScript

React

Custom UI components

Primitives

Headless primitive composition

Design systems

Motion design

AI-assisted development tools

WCAG/ARIA accessibility

APIs / data models

Tools

Base UI

Radix

Open-source component systems

Job description

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Product Design Engineer based in Brazil.

Own core product experiences end to end, combining exceptional product design judgment with strong design engineering skills.
You'll turn ideas and prototypes into production-ready components that are accessible, robust, and ready for engineers to use directly.
The role sits at the intersection of product design, frontend engineering, design systems, and interaction design.
You'll build and evolve reusable primitives while continuously improving a shared open-source component library.
You'll work with modern AI development tools to prototype quickly, explore ideas, and accelerate the path from concept to production.
The environment is remote-first and async, with a high degree of autonomy, direct feedback, and a strong emphasis on craft and thoughtful collaboration.
This is an opportunity to shape both the product experience and the design system behind a globally used scheduling platform.

Accountabilities

• 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, selecting the fastest approach for answering product and design questions.
• 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 rather than creating one-off solutions.
• Maintain consistency across tokens, spacing, states, dark mode, motion, and interaction patterns, ensuring every new product surface strengthens the overall design system.
• Apply motion and animation thoughtfully, using it to clarify interactions and improve the experience without adding unnecessary complexity.
• Own outcomes rather than simply delivering design artifacts 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 the 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, incorporating feedback, and allowing technical and product constraints to inform design decisions.
• Document design thinking and decisions through written documentation, prototypes, and recorded walkthroughs to support effective asynchronous collaboration.

Requirements:

• Proven experience as a product designer who has evolved substantially into design engineering, with ownership of complex and ambiguous product areas from problem definition through launch and iteration.
• 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, rather than primarily consuming third-party component libraries.
• Deep expertise in headless primitive composition, with experience using Base UI, Radix, or similar technologies; direct experience with open-source component systems is a strong advantage.
• Strong understanding of motion design principles, including timing, easing, choreography, and the judgment to determine when animation adds value.
• Daily experience using AI-assisted development tools such as Claude Code, Cursor, v0, or comparable solutions.
• Deep familiarity with web standards and browser-native platform primitives, with the ability to understand what the browser already provides before introducing additional libraries.
• Proven experience building and maintaining design systems, including understanding the distinction between reusable primitives, components, and product-specific patterns.
• Strong accessibility knowledge covering WCAG, ARIA, assistive technologies, keyboard interaction, focus management, and accessible design patterns.
• Ability to understand the technical architecture behind product experiences, including APIs, data models,