Founding Designer

Mosaic • New York City, NY

1d

About The Position

Mosaic is hiring a Founding Designer to shape the product experience from the ground up. This is a high-ownership role for someone who wants to define design at a company building software for some of the most sophisticated decision-makers in the world. You’ll work directly with product and engineering leadership to create an intuitive, high-trust platform that transforms how deals get analyzed, reviewed, and executed. Private market investing runs on spreadsheets, documents, and legacy workflows—and Mosaic is building the next generation of tooling: AI-powered, auditable, and built for speed. As Founding Designer, you’ll turn complex workflows into simple, elegant experiences and establish Mosaic’s design principles, systems, and craft bar. You’ll be involved across the full lifecycle: customer discovery, workflow design, prototyping, UI systems, interaction design, and shipping product alongside engineers. The scope is broad, the pace is high, and your work will define how Mosaic feels for years to come.

Requirements

• Strong Product Designer with Founder-Level Ownership
• 4+ years of product design experience (or equivalent craft + portfolio)
• Excited to be hands-on, scrappy, and deeply embedded in the product
• Systems + UX Thinking
• Strong instincts for information architecture, complex workflows, and usability
• Ability to design products that support expert users and dense concepts
• Exceptional Craft
• High attention to detail across UI, interaction, typography, layout, and polish
• Ability to make complex software feel simple and calm
• Collaborative and Clear Communicator
• Comfortable working directly with engineers and shipping together
• Ability to explain decisions, iterate with feedback, and build alignment
• Customer-Obsessed Product Mindset
• Loves talking to users, watching workflows, and identifying what matters
• Can synthesize feedback into sharp product insights and design direction

Nice To Haves

• Experience designing for fintech, B2B SaaS, or workflow-heavy products
• Familiarity with spreadsheet-like UI patterns and analytical tooling
• Comfort designing for AI-driven workflows (extraction, review, agents, automation)
• Some front-end fluency (you can speak dev, understand constraints, and move fast)

Responsibilities

• Own Design End-to-End
• Lead design for key product areas from early discovery through launch
• Translate messy real-world workflows into clear, intuitive product flows
• Produce high-quality UI and interaction design for core surfaces
• Build a High-Trust, High-Performance Product Experience
• Design experiences that feel fast, precise, and dependable
• Create interfaces that support accuracy, auditability, and confidence
• Design for power users who live in tools all day (bankers, investors, and deal teams)
• Develop Mosaic’s Design System & Visual Language
• Establish foundational components, patterns, and UX principles
• Drive consistency across the product while keeping velocity high
• Raise the bar on craft, clarity, and usability across everything we ship
• Partner Cross-Functionally and Influence the Roadmap
• Collaborate closely with product, engineering, and GTM teams
• Bring customer insight into product decisions and prioritization
• Use prototypes to explore directions, align stakeholders, and move quickly
• Be a Builder in a Fast-Growing Startup
• Operate with high autonomy and ownership in an unstructured environment
• Move quickly and iteratively—shipping, learning, refining
• Help define how design works at Mosaic: process, tools, rituals, and culture

Benefits

• A competitive base salary
• A meaningful early-stage equity package designed to create life-changing wealth as Mosaic scales
• Health, vision & dental coverage
• Unlimited PTO
• Unforgettable team building events, offsites, and happy hours

What This Job Offers

• Job Type: Full-time
• Career Level: Entry Level
• Education Level: No Education Listed