Sr. UI/UX Designer

North Eastern Services; Brasília; On-site; BRL 467,000 - 675,000; Full time

Job summary

Fusemachines is seeking a Sr. UX/UI Designer to join a product team and own the end-to-end design of a product area. The role emphasizes crafting user-centered AI-driven experiences, prototyping rapidly, and driving decisions with research and usability testing.

The candidate should ship products with a strong design system, clear communication in English, and the ability to work with AI tools to enhance design outcomes. Remote, full-time position with global collaboration.

Qualifications

• At least 5 years of UX/UI design experience, with a portfolio of products that shipped.
• Demonstrated use of AI in real design work, with examples of what it changed.

Responsibilities

• Own the design of a product area end to end, partnering with product and engineering on the goals and constraints behind the roadmap.
• Take ideas to clickable prototypes quickly, and use them to drive decisions instead of slides.
• Run research and usability testing, and bring the findings to the people making the calls.
• Stay with the work after release, watching how it performs and iterating.
• Maintain and extend the design system so people and AI tools produce on brand, accessible output by default.
• Share prompts, workflows, and failed experiments to raise the team's AI fluency.
• Own the quality of everything you deliver. Nothing ships without a designer's review, AI assisted or not.

Job description

About Fusemachines

Founded in 2013, Fusemachines is a global provider of enterprise AI products and services, on a mission to democratize AI. Leveraging proprietary AI Studio and AI Engines, the company helps drive the clients’ AI Enterprise Transformation, regardless of where they are in their Digital AI journeys. With offices in North America, Asia, and Latin America, Fusemachines provides a suite of enterprise AI offerings and specialty services that allow organizations of any size to implement and scale AI. Fusemachines serves companies in industries such as retail, manufacturing, and government.

Fusemachines continues to actively pursue the mission of democratizing AI for the masses by providing high-quality AI education in underserved communities and helping organizations achieve their full potential with AI.

Type: Remote, Full-time

Key Objective

The Sr. UX/UI Designer sits on a product team and owns the design of a product area, connecting real user needs with business goals. This designer thinks like a product owner and understands how the product earns its keep. Craft and research fundamentals stay non negotiable, and AI is the working partner that makes it possible to explore more options and prove ideas faster. Key Objective:

Qualifications and Experience

• At least 5 years of UX/UI design experience, with a portfolio of products that shipped.
• Demonstrated use of AI in real design work, with examples of what it changed.

Required skills/competencies

AI fluency and vibe design

• Fluent with current AI design, prototyping, and coding tools such as Figma Make, Claude, Cursor, v0, or Lovable, and quick to learn the next ones.
• Vibe designs with intent, going from rough idea to working prototype in hours by steering AI with a trained eye.
• Treats a prompt like a design brief, giving AI the context, constraints, and design system rules it needs.
• Uses AI across the process, from research synthesis and UX copy to edge cases, accessibility checks, and QA.
• Can tell a fast AI output from a good one, and sets the tool aside when doing it by hand is better.

Designing AI products

• Designs for systems that do not give the same answer twice, handling uncertainty, wrong answers, and partial results without losing the user's trust.
• Understands how models and agents behave well enough to set honest expectations and place human review where being wrong is costly.
• Thinks past the chat box, designing agentic and assisted workflows rather than defaulting to conversation.

Product and business thinking

• Knows how the product makes money, who it serves, and what the success metrics and constraints are, and designs with that in view.
• Weighs desirability, feasibility, and viability, and can say no to an idea that is not worth what it costs.
• Argues design decisions in terms stakeholders care about, such as conversion, retention, or time to ship.

Design fundamentals

• Strong visual and interaction craft in Figma, and the judgment to run a design system rather than only work inside one.
• Research and usability testing that ends in decisions, not decks.
• Enough code literacy to read a component, change it, and steer an AI coding tool.
• Clear communication in English, able to explain and defend decisions to non designers.
• Owns the process end to end, scoping, prioritizing, and delivering independently.

Good to have

• A degree in design, computer science, information technology, or a related field.
• Production front end experience with HTML, CSS, SASS, or React.
• Prompt libraries or reusable AI workflows built for a team.

Key responsibilities

• Own the design of a product area end to end, partnering with product and engineering on the goals and constraints behind the roadmap.
• Take ideas to clickable prototypes quickly, and use them to drive decisions instead of slides.
• Run research and usability testing, and bring the findings to the people making the calls.
• Stay with the work after release, watching how it performs and iterating.
• Maintain and extend the design system so people and AI tools produce on brand, accessible output by default.
• Share prompts, workflows, and failed experiments to raise the team's AI fluency.
• Own the quality of everything you deliver. Nothing ships without a designer's review, AI assisted or not.

Fusemachines is an Equal Opportunities Employer, committed to diversity and inclusion. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or any other characteristic protected by applicable federal, state, or local.