Software Engineer

About the role

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