Sr. UI/UX Designer

Fusemachines; Brasília; Remote; BRL 120,000 - 180,000; Full time

Job summary

Fusemachines is seeking a Sr. UX/UI Designer for a remote role. You will own design for a product area, connect user needs with business goals, and work with AI-enabled design tools to prototype rapidly.

Require 5+ years of UX/UI experience with shipped products and a proven track record of applying AI in real design work. Strong visual craft, research, and English communication are essential for success.

Qualifications

• 5+ years of UX/UI design experience with shipped products.
• Demonstrated use of AI in real design work with examples.

Responsibilities

• Own the design of a product area end to end with product and engineering.
• Create clickable prototypes quickly to drive decisions over slides.
• Lead research and usability testing and present findings to stakeholders.
• Monitor performance post-release and iterate accordingly.
• Maintain and extend the design system for on-brand, accessible output.

Skills

AI fluency

Figma

Prototype quickly

Research & usability testing

English communication

Education

Design or CS degree

Tools

Figma Make

Claude

Cursor

v0

Lovable

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.

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.

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.