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Alt.xyz

Platform for trading card investment services

Lead Design Builder

Product DesignConfirmed live in the last 24 hours
Full-timeNew York, NY, USA

About the Job

Requirements

  • Demonstrate relentless curiosity about users and conduct customer research directly.
  • Have repeatedly made ambiguous, open-ended problems tractable by framing the problem, choosing what not to solve, and establishing clarity.
  • Articulate problems clearly and defend trade-offs to engineers, founders, and customers.
  • Influence product direction through reasoning, including reframing roadmaps, stopping poor directions, and advocating for design details.
  • Have founding, first, or early designer experience, or have built something independently.
  • Have shipped products or features conceived by the candidate and be able to explain their problem framing.
  • Present a portfolio organized around problems and outcomes, with quantitative results, decisions, and learnings.
  • Prototype in code or code-adjacent tools and be able to discuss a recent artifact built with tools such as Claude, Cursor, Lovable, v0, or Figma Make, including what it got wrong.

Responsibilities

  • Own marketplace surfaces including listing and submission, offers, bidding and auction close, and payout.
  • Write a problem frame for owned surfaces, including user need, evidence, and success metrics.
  • Design complete solutions that address the problem and deliver a polished user experience.
  • Develop multiple solution directions, pressure-test and validate them with users, and converge against the written success bar.
  • Make decisions about interface behavior, tone, content, and effects on neighboring screens and user experience.
  • Write product copy, including explanations of offers.
  • Define how the product communicates confidence and uncertainty, and approve trust-related experiences involving model-generated content.
  • Establish the quality foundation for the team’s work and preserve design fidelity through implementation by pairing with engineers at launch.
  • Instrument metrics before launch, run readouts, and address unsuccessful outcomes.
  • Conduct weekly customer conversations, analyze customer experience tickets and session replays, and run lightweight tests.
  • Build working prototypes in code for evaluating ideas.
  • Build clickable prototypes of new flows using real card data, simulated model output, and testable interactions.
  • Write a Claude skill that checks designs against the surface’s written quality bar before review.
  • Analyze customer experience tickets and session replays at scale to identify behavioral patterns.
  • Synthesize customer calls into actionable findings for the team on the same day.
  • Generate and evaluate multiple design directions before committing to one, documenting the learning from each.
  • Test prototypes with high-value sellers and bring behavioral data into roadmap planning.

Desired Qualifications

  • Experience with marketplaces or two-sided products.
  • Experience with high-consideration or financial products where trust was a conversion concern.
  • Experience with consumer products that have passionate communities.
  • Collecting trading cards or having a perspective on the trading-card market.
  • Experience building agents, Claude skills, Model Context Protocol servers, connectors, or internal tools used by a team.

About the Company

Alt.xyz

Platform for trading card investment services

Alt is a platform for researching, buying, selling, and borrowing trading cards, offering real-time pricing data, portfolio tracking, and a secure vault for asset storage. The platform leverages technologies such as instant card valuation and market trend analysis to enable users to maximize their card sales and make informed investment decisions.

Company size
51-200
Company stage
Series B
Total funding
$404.4M
Headquarters
San Francisco, California
Founded
2020

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