Software Engineer

Fullstack Engineer at MosaicMosaic 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.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 ResponsibilitiesOwn features from idea ? design ? implementation ? testing ? deploymentBuild intuitive, polished UI workflows that feel fast and trustworthyShip backend APIs and services that support complex user actions and data flowsImprove the architecture of core systems powering modeling and analysisWrite clean, maintainable, well-tested code that raises the team's barEnsure performance and reliability for workflows used in live deal environmentsBuild with auditability and correctness in mindHelp define patterns for permissions, versioning, and reproducibilityBalance velocity with quality in a product where accuracy mattersPartner with product, design, and GTM teams to translate needs into productIncorporate feedback from real customer workflows (often built in Excel)Contribute to roadmap shaping through technical insight and executionParticipate in code reviews, technical design discussions, and system planningImprove developer tooling, observability, and internal infrastructureHelp define best practices as the engineering org scalesWho We're Looking ForFullstack Product BuilderStrong Frontend FundamentalsBackend & Systems CapabilityHigh Ownership / Startup MentalityThoughtful CollaboratorWhy Join Mosaic?Build the AI-powered modeling and workflow platform for private marketsWork on hard technical problems with real-world stakes and complexityJoin a team of top-tier operators across finance and technologyHave major product and technical influence as the company scalesShip software that immediately impacts how the world's top firms make decisionsPlay 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?A competitive base salary; andAn early-stage start-up equity package designed to create life-changing wealth when we win as a team.Other Perks & Benefits:Health, vision & dental coverageUnlimited PTOUnforgettable 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 peersTo grow your skillset in building technology businessesTo experience the joys, learning opportunities, and growing pains of doing something completely newTo 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!