---
title: 'Founding Full Stack Engineer at Vantager'
canonical: 'https://feeny.ai/job/founding-full-stack-engineer-vantager-new-york-6dyk5z6hn1ps'
type: 'job'
last_seen: '2026-09-05'
---

# Founding Full Stack Engineer at Vantager

- **Company:** Vantager
- **Location:** New York, NY
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2024-08-30
- **Last confirmed live:** 2026-09-05
- **Apply:** https://jobs.gem.com/vantager/am9icG9zdDp-rq4DfBhexSdpsPPgzG00

## Job description

## About Vantager

At Vantager, we're shaping the future of global capital allocation. We're building an AI-native platform that redefines how investors interact with private market financial data, areas traditionally challenged by unstructured data and limited regulation. We're on a high-growth trajectory, VC backed by world-class investors and unicorn fintech founders. Our platform is already empowering over 20 investment firms, collectively managing more than $100B in assets, to work faster through workflow automation and make smarter, data-driven decisions.

Our mission is bold, our technology cutting-edge, and our team is the driving force behind our success. We believe in the power of innovation, the importance of integrity, and the necessity of a collaborative environment. Our culture fosters creativity and encourages each individual to take ownership of their work. Here, every idea matters, and every contribution counts.

## What we're looking for

Vantager is seeking a passionate and experienced Founding Full Stack Engineer. This role is perfect for a self-driven software engineer who's excited about building intuitive user interfaces and robust backend systems for AI-native applications. At Vantager, you'll work alongside some of the brightest minds in the industry, tackling challenging problems and making a real impact.

If you're passionate about creating seamless user experiences, working with cutting-edge tech, and eager to grow in a dynamic environment, Vantager is the place for you. We're looking for independent and ambitious talent who are ready to push the boundaries of what's possible and redefine the investment landscape. Join us, and together, let's build something extraordinary.

## Responsibilities

- Design and implement intuitive user interfaces for our platform using Next.js (React)
- Architect and develop robust backend systems to support our AI-native platform
- Take ownership of critical system components, from frontend to backend
- Implement advanced data tables, charting, and text streaming functionality
- Iterate on customer feedback to continuously improve user experience
- Integrate and optimize interactions with large language model APIs

## Qualifications

- 3+ years of software engineering experience, with strong proficiency in our tech stack: TypeScript, Next.js (React), Python, FastAPI, and relational databases (MySQL/Postgres)
- Demonstrated expertise in building and deploying full-stack web applications
- Strong understanding of frontend design principles and modern UI/UX best practices
- Experience working with RESTful APIs and integrating third-party services
- Familiarity with AI concepts, including LLMs, RAG systems, and vector databases
- Self-motivated with excellent problem-solving and communication skills

Bonus Points

- Degree from a top-tier university in Computer Science or a related field
- Experience in the finance, trading, or investment sectors
- Knowledge of data visualization libraries and techniques
- Contributions to open-source projects or personal side projects
- Experience with cloud platforms (AWS), serverless architecture, and Docker
- Previous experience at a startup or small-mid sized company

## Compensation

- $100k - $180k salary
- 0.5% - 1.5% equity

## About Vantager

## Company Overview
- **One-liner**: Vantager provides an AI-powered platform that streamlines pre-investment due diligence, analysis, and reporting for institutional investors in private markets.
- **Entity Type**: Private (acquired by MSCI Inc., NYSE: MSCI, in March 2026; now part of a public company)
- **Headquarters**: New York, New York, United States
- **Founded**: 2024 (per MSCI press release; BuiltIn lists 2023)
- **Founders**: Mason Lender (Co‑founder & CEO)

## Core Business
- **Primary industry**: Private markets technology / Business Intelligence Platforms for limited partners (LPs)
- **Target customers**: Pensions & sovereign wealth funds, endowments & foundations, private wealth managers, fund of funds – all institutional investors in private markets (B2B, enterprise)
- **Mission or purpose**: Bring speed, structure, and scale to the manual, fragmented due‑diligence process for private market investors

## Products & Services
- **Vantager Platform (now MSCI Diligence Platform)**: AI‑powered data rooms, intelligent data extraction and structuring (OCR), dynamic dashboards, and automated report generation. Ingest PowerPoint, PDFs, Excel, Zip files; automatically tag and link information to its source for easy sourcing and confident decision‑making.

## Market Standing
- **Valuation / Market Cap**: Not disclosed (acquisition terms not material to MSCI)
- **Key Metric**: $100B+ AUM of organizations using Vantager; 4,000+ funds diligenced; 50,000+ underlying investments processed
- **Notable Investors/Partners**: Acquired by MSCI Inc. in 2026. Prior investors not disclosed.
- **Growth Signals**: Rapid adoption (100B+ AUM user base), acquisition by a global leader in private assets analytics, integration into MSCI’s end‑to‑end private markets suite

## Competitive Advantages
- **AI‑native platform**: Automates one of the most manual and time‑consuming stages of private investing – due diligence
- **No data training**: Does *not* train models on customer data, addressing a key security concern for institutional clients
- **Comprehensive ingestion**: Handles unstructured data (pitch decks, spreadsheets, PDFs, zipped files) out of the box
- **Customization**: Flexible dashboards and reporting templates tailored to each LP’s workflow
- **Security**: Encryption, secure storage, and user access controls compliant with industry standards

## Strategic Focus
- **Integration with MSCI**: Embedding the platform into MSCI’s broader private assets offering to create a seamless experience from pre‑investment diligence to post‑trade analytics and benchmarking
- **Expansion**: Serving a wider range of institutional investors globally by leveraging MSCI’s distribution and data resources

## Why Work Here
- **Small team, big impact**: With ~8 employees (BuiltIn estimate; LinkedIn shows 2), engineers and product builders have outsized ownership over the platform’s direction
- **AI & private markets intersection**: Opportunity to work on cutting‑edge AI/OCR solutions applied to a high‑value, data‑intensive domain
- **Hybrid culture**: Based in New York City; employees work both on‑site and remotely (typical time on‑site expected for engineering roles)
- **Recent acquisition by MSCI**: Now offers the stability and resources of a global public company while retaining a startup‑like focus and velocity
- **Roles posted**: Founding AI Engineer and Founding Full Stack Engineer (in‑office in NYC) – ideal for early‑stage builders who want to shape the product from the ground up

## Sources
1. [Vantager Website](https://www.vantager.com/)
2. [MSCI Press Release – Acquisition of Vantager](https://www.msci.com/discover-msci/media-room/msci-transforms-private-markets-pre-investment-diligence-with-acquisition-of-vantager)
3. [BuiltIn – Vantager Company Profile](https://builtin.com/company/vantager)
4. [LinkedIn – Vantager](https://linkedin.com/company/vantager)

## Other roles at Vantager

- [Founding AI Engineer](https://feeny.ai/job/founding-ai-engineer-vantager-new-york-ftz19mqgj5t3) — New York, NY
- [Founding Full Stack Engineer](https://feeny.ai/job/founding-full-stack-engineer-ajax-new-york-t6fszaap9hta) — New York, NY
- [Founding Full Stack Engineer](https://feeny.ai/job/founding-full-stack-engineer-stand-new-york-9ns7t2xs98j7) — New York, NY
- [Founding Full Stack Engineer](https://feeny.ai/job/founding-full-stack-engineer-vamo-santa-monica-9wpea07jgtrw) — Santa Monica, CA
- [Founding Full Stack Engineer](https://feeny.ai/job/founding-full-stack-engineer-riley-san-francisco-78h1fysqs3tz) — San Francisco, CA