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DiligenceSquared (YC F25) · 1 month ago

Founding Engineer - Fullstack

New York, NY

Full-time

Onsite

Mid Level

$140K/yr - $250K/yr

3+ years exp

DiligenceSquared is a YC-backed company that automates commercial due diligence for Private Equity funds. They are seeking a Founding Software Engineer with deep expertise in full-stack development to develop an AI platform that aids investment professionals in making billion-dollar decisions.

AnalyticsArtificial Intelligence (AI)Information Technology

Responsibilities

Build new product features and experiences end-to-end, everything from database models to API endpoints, and integrating them with UI components for our Web App and AI Voice Agent application

Design and build new AI-powered modules from scratch (e.g., market sizing, competitive analysis) that become core capabilities of our research platform

Build and own product foundations across the stack (AI agent orchestration, voice AI pipelines, interactive data visualization, app and API performance, intelligent automations)

Apply learnings from each project into the product, so we're 1% better everyday (Law of Compounding is real. After all, we are founded by investment professionals)

Qualification

Full-stack developmentReact/TypeScriptPythonLLM platformsPostgreSQLAPI designModern frontend architectureNext.jsFastAPIAgent orchestration frameworksAI/ML product interfacesVector databasesSupabaseStartup experience

Required

3+ years of professional full-stack development experience

Strong proficiency in React/TypeScript and Python

Experience building agentic systems with LLM platforms (Anthropic, OpenAI, or similar)

Deep hands-on experience with LLMs in production - building reliable agentic systems, not just API calls

Experience with PostgreSQL and SQL database design

Experience with modern frontend architecture, state management, and API design

Track record of shipping user-facing products end-to-end

Preferred

Experience with Next.js and FastAPI

Experience with Anthropic Claude API and Agent SDK

Familiarity with agent orchestration frameworks

Background building interfaces for AI/ML products or data-intensive applications

Familiarity with vector databases and semantic search

Experience with Supabase

Previous startup experience

Company

DiligenceSquared (YC F25)

At DiligenceSquared, we enable leading investors and corporates to make critical investment decisions with confidence through AI-powered market research and commercial due diligence.

Founded in 2025

San Francisco, California, USA

2-10 employees