DiligenceSquared

Engineer - Fullstack

New York City

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hirly's read of this role

Role family: Engineering
Seniority: Mid level
Stated salary: $160,000 – $200,000 per year
Country: US
Work mode: On-site / unstated
First seen by hirly: 28 Sept 2026

Derived automatically from the posting. Upload your resume above to see how the role scores against it.

the posting

We're looking for a Software Engineer with deep expertise in full-stack development to help develop the next-generation AI platform for market due diligence. You'll own complete features end-to-end - from AI-powered backend systems to polished frontend interfaces that investment professionals in Private Equity, Hedge Funds, Private Credit, and Corporate M&A use to make billion-dollar decisions.

About DiligenceSquared

DiligenceSquared is the AI-native consulting firm. We deliver investment-grade market research and commercial due diligence, powered by AI agents and led by experienced consultants. Our founding team brings deep experience from Blackstone and BCG, and we're backed by Y Combinator and Relentless. Our clients include 5 of the 10 largest private equity firms in the world and represent more than $3T in combined AUM.

What you will do:

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).

Qualifications:

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

Bonus:

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

Who you are:

Love owning complete features rather than just frontend or backend pieces

Can context-switch effectively between system design and UI polish

Take pride in your code and want to work with others who do the same

Act with Urgency so we can empower you with Agency

Pay high attention to detail and are curious about how great products work

Feel discomfort when things don't move as fast as you feel they should

Original posting on DiligenceSquared's site ↗

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