Founding Designer
About Mosaic
Mosaic is the AI-driven deal modeling platform for private markets, used by leading investors and advisors including Warburg Pincus, CVC, New Mountain, and Evercore. Mosaic automates and standardizes core deal analyses—such as LBOs and DCFs—so investment teams can move faster, reduce spreadsheet risk, and spend more time on investment judgment.
Mosaic’s platform combines deterministic, rules-based calculations with AI-powered ingestion and agentic workflows to generate replicable, audit-ready outputs that private equity, private credit, and investment banking teams can trust across billion-dollar deals.
Mosaic is on a mission to build the AI-driven operating system for the world’s most sophisticated investors and their advisors. We’re growing quickly and are hiring across engineering, product, customer enablement, and go-to-market teams.
For those excited to sit at the intersection of high finance and technology, Mosaic offers a rare opportunity to shape how the industry operates for decades to come.
Read more about our story:
About the Role
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.
Key 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
Who We’re Looking For
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
Bonus (Not Required)
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)
Why Join Mosaic?
Define design at a company reinventing core workflows in private markets
Work on high-impact, high-complexity product problems with real stakes
Partner with a world-class team across engineering, product, and finance
Shape the future of how investment firms execute deal analysis
Build a product used by elite investors and advisors on billion-dollar decisions
What’s in it for you?
This is a full-time position with:
A competitive base salary
A meaningful early-stage equity package designed to create life-changing wealth as Mosaic scales
Other perks & benefits:
🦷 Health, vision & dental coverage
🌴 Unlimited PTO
🚠 Unforgettable team building events, offsites, and happy hours (feel free to ask about it during the interview 😊)
If you find yourself waking up every day seeking:
To be challenged by your peers
To grow your skillset in building technology businesses
To experience the joys, learning opportunities, and growing pains of doing something completely new
To have a shot at a generational wealth creation event
…then Mosaic is definitely the place for you.
We’re looking to hire people who take ownership, communicate openly, have an entrepreneurial mindset, and are excited to bring a totally new technology to an incredible industry. We encourage all candidates to apply even if your experience doesn't exactly match up to our job description. We are committed to building a diverse and inclusive workspace where everyone (regardless of age, religion, ethnicity, gender, sexual orientation, and more) feels like they belong. We look forward to hearing from you!