Senior UI/UX Designer

About Mecka AIMecka AI is building the data infrastructure layer for robotics and embodied AI.We design and operate global systems for data labeling, data capture, and hardware-enabled workflows used by leading AI and robotics teams. These products are used daily by operators, contributors, country managers, and customers across multiple countries.Design quality matters. Our tools are operational, complex, and used at scale - clarity, speed, and usability are critical.The RoleWe're hiring a Senior UI/UX Designer based in Toronto to own product design end-to-end across Mecka's web and mobile applications.This is a 0→1 design role. You'll build design systems from scratch, shape product direction, and turn complex operational workflows into beautiful, intuitive experiences. You'll work closely with engineers, operators, and founders, shipping quickly and iterating in real production environments.This role is ideal for someone who thrives in early-stage startups and balances taste, speed, and practicality.What You'll Work OnProduct & UX DesignDesign end-to-end user experiences for:Web applicationsMobile applicationsInternal operational toolsTranslate complex workflows (labeling, capture, ops) into clear, usable interfacesOwn user flows, information architecture, and interaction design Design Systems (0→1)Build and evolve Mecka's design system from scratchDefine components, patterns, and visual languageEnsure consistency across products while enabling fast iterationPartner closely with engineers to ensure designs ship cleanly and scale well AI-Assisted Design & PrototypingUse modern AI design and coding tools to accelerate iterationBuild functional prototypes using tools like Claude Code, Codex, and similarRapidly validate ideas by pairing design with lightweight implementationHelp define how AI-assisted workflows fit into Mecka's design process Collaboration & ShippingWork closely with frontend engineers to ship high-quality UIPartner directly with founders and ops teams to understand real user needsShip quickly, test in production, and iterate based on feedbackBalance polish with speed - knowing when "good enough" is the right call Who You AreRequired Experience6+ years of experience in UI/UX or product designProven experience taking products from 0→1Experience building design systems from scratchStrong portfolio showing end-to-end product ownershipExperience designing web applications (mobile is a strong plus) Strong SignalsExperience designing mobile apps (iOS, Android, or cross-platform)Comfort using AI-powered design and prototyping toolsAbility to go from idea → prototype → shipped UI quicklyStrong visual taste paired with pragmatic UX judgmentExperience shipping fast in early-stage or fast-moving environments You AreOpinionated, but collaborativeFast, pragmatic, and detail-orientedComfortable with ambiguity and incomplete requirementsExcited to build foundational systems, not just featuresMotivated by real-world impact, not just visual polish Why This RoleOwn design at a critical stage of Mecka's growthBuild foundational design systems used across the companyWork directly with founders, engineers, and operatorsShip real products used daily across global operationsShape how Mecka approaches product, UX, and design quality