---
title: 'Software Engineer at Mosaic'
canonical: 'https://feeny.ai/job/software-engineer-mosaic-new-york-hf835qapez8y'
type: 'job'
last_seen: '2026-09-11'
---

# Software Engineer at Mosaic

- **Company:** Mosaic
- **Location:** New York, NY
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-01-20
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.ashbyhq.com/mosaic/49f2511d-4835-4d18-813f-e8dec4cdd7da

## Job description

## 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:

- [Bloomberg](https://www.bloomberg.com/news/articles/2024-09-16/startup-touts-automated-deal-modeling-tool-aimed-at-overworked-junior-bankers?embedded-checkout=true)
- [Financial Times](https://www.ft.com/content/8c76fefd-dae4-41a9-b963-1a118a29f011)
- [NY Post](https://nypost.com/2025/01/09/business/this-startup-could-be-the-end-of-wall-street-all-nighters/)

## About the Role

As a Fullstack Engineer at Mosaic, you’ll build product experiences that investors and bankers rely on to run high-stakes deal processes. You’ll work across the stack—from sleek, high-trust interfaces to backend services that power modeling, ingestion, collaboration, and workflow automation. This is a role for builders who want real ownership. You’ll ship features end-to-end, collaborate tightly with product and design, and help establish the technical foundations for a platform used in mission-critical environments. You’ll tackle challenging problems like structured financial computation, document ingestion, auditability, permissions, real-time collaboration, and performance at scale. Your work will directly impact how the world’s most sophisticated financial teams evaluate acquisitions, credit investments, and major corporate decisions.

## Key Responsibilities

Build End-to-End Product Experiences

- Own features from idea → design → implementation → testing → deployment
- Build intuitive, polished UI workflows that feel fast and trustworthy
- Ship backend APIs and services that support complex user actions and data flows

Design Systems that Scale

- Improve the architecture of core systems powering modeling and analysis
- Write clean, maintainable, well-tested code that raises the team’s bar
- Ensure performance and reliability for workflows used in live deal environments

Work in a High-Trust, High-Accuracy Domain

- Build with auditability and correctness in mind
- Help define patterns for permissions, versioning, and reproducibility
- Balance velocity with quality in a product where accuracy matters

Collaborate Deeply with Product & Customers

- Partner with product, design, and GTM teams to translate needs into product
- Incorporate feedback from real customer workflows (often built in Excel)
- Contribute to roadmap shaping through technical insight and execution

Drive Engineering Excellence

- Participate in code reviews, technical design discussions, and system planning
- Improve developer tooling, observability, and internal infrastructure
- Help define best practices as the engineering org scales

Who We’re Looking For Fullstack Product Builder

- 2–6+ years of experience building modern web applications
- Comfortable working across frontend + backend and owning features end-to-end

Strong Frontend Fundamentals

- Experience building clean UIs with modern frameworks (React preferred)
- Strong instincts around usability, quality, and UI performance

Backend & Systems Capability

- Experience building APIs and services (Node, Python, Go, etc.)
- Strong data modeling instincts and comfort working with relational databases
- Familiarity with cloud infrastructure and production systems

High Ownership / Startup Mentality

- Self-starter who thrives in fast-moving, unstructured environments
- Bias toward action, shipping, and iterating quickly with the team

Thoughtful Collaborator

- Clear communicator who enjoys working cross-functionally
- Excited to pair, review code, and build internal momentum

Bonus (Not Required)

- Experience building tools for finance, analytics, or high-compliance workflows
- Familiarity with AI product patterns (LLMs, agents, structured extraction)
- Experience with workflows involving spreadsheet-like interactions
- Exposure to observability tooling, performance profiling, or infra work

Why Join Mosaic?

- Build the AI-powered modeling and workflow platform for private markets
- Work on hard technical problems with real-world stakes and complexity
- Join a team of top-tier operators across finance and technology
- Have major product and technical influence as the company scales
- Ship software that immediately impacts how the world’s top firms make decisions
- Play a key role in shaping Mosaic’s product roadmap and influencing its growth.
- Enjoy opportunities for career growth and leadership in a dynamic, fast-paced environment.
- Make a tangible impact by helping customers succeed and drive innovation in the industry.

What’s in it for you? This is a full-time position with:

- A competitive base salary; and
- An early-stage start-up equity package designed to create life-changing wealth when we win as a team.

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!

## About Mosaic

## Company Overview
- **One-liner**: Mosaic is an AI-driven deal modeling platform for private markets that automates LBO, DCF, and other core analyses for investment professionals.
- **Entity Type**: Private (Series A, $18M raised, April 2026)
- **Headquarters**: New York City, United States (575 Fifth Avenue, 14th Floor, New York, NY 10017); also offices in Toronto, Canada
- **Founded**: 2022 (raised pre-seed in May 2022)
- **Founders**: Ian Gutwinski (CEO) and Angelica S. (Co-Founder)

## Core Business
- **Primary Industries**: Financial Services / Private Equity / Investment Banking – AI-powered deal modeling software.
- **Target Customers**: B2B – private equity firms, investment banks, credit funds, and other institutional investors and their advisors.
- **Mission/Purpose**: “Build the AI-driven operating system for deal makers” – enabling teams to move faster, reduce spreadsheet risk, and spend more time on investment judgment.

## Products & Services
- **Mosaic AI Deal Modeling Platform**: SaaS platform that uses generative AI and rules-based algorithms to generate near-instantaneous financial models (LBOs, DCFs, etc.) from CIMs and other source documents. Models are fully exportable to Excel with working formulas and best-in-class modeling practices. Integrates with Capital IQ and FactSet for streamlined workflows.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Total funding of $18.1M (Pre-Seed $100k in 2022, Series A $18M led by Radical Ventures in April 2026)
- **Notable Investors/Partners**: Radical Ventures (led Series A); backed by founders of Ontra and BamSEC; used by Warburg Pincus, CVC Capital Partners, New Mountain Capital, Evercore, Investcorp, Onex Partners, OTPP, and others.
- **Growth Signals**: 50% YoY headcount growth (to 17 employees); offices in US, Canada, UK, India; “managing over $1 trillion in assets” among clients; consistent expansion of modeling capabilities and integrations.

## Competitive Advantages
- **Transparency**: All models downloadable to Excel with working formulas – no black box.
- **Accuracy & Reliability**: Rules-based algorithms that do not hallucinate, forget steps, or mislink formulas.
- **Speed**: Generates CIM-to-LBO in under 10 minutes, dramatically reducing time-to-decision.
- **Adoption by Top-Tier Firms**: Trusted by leading PE firms and advisory firms, creating a strong network effect and credibility.

## Strategic Focus
- **Current Priorities**: Build out the “AI-driven operating system for deal makers” – expanding modeling capabilities, deepening integrations (Capital IQ, FactSet), and scaling go-to-market (hiring across engineering, product, marketing, and sales).
- **Growth Direction**: Geographic expansion (UK, India presence growing) and vertical penetration into banking/credit, private equity, and other private market segments.

## Why Work Here
- **Culture**: Valuing intellectual curiosity, ownership, and collaboration. Emphasis on autonomy and impact.
- **Work Environment**: Hybrid/office – roles listed as New York City or Toronto; likely expects presence at HQ offices.
- **Compensation & Perks**: Attractive cash compensation, meaningful equity, “best-in-class benefits” (details not fully transparent).
- **Engineering Team**: Modern tech stack (AI/ML, strong financial modeling domain); small team with high ownership and cross-functional collaboration.
- **Notable**: Opportunity to shape the future of deal making in a fast-growing, well-funded startup backed by domain experts.

## Sources
1. [mosaic.pe/careers](https://www.mosaic.pe/careers)
2. [mosaic.pe/about](https://www.mosaic.pe/about)
3. [mosaic.pe](https://www.mosaic.pe/)
4. [LinkedIn Company Page](https://www.linkedin.com/company/mosaic-pe)
5. [Ashby Jobs Portal](https://jobs.ashbyhq.com/mosaic/797823c8-40a6-444b-b49f-6dea2b71869e)

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