Engineer - Fullstack
DiligenceSquared· startup· Market Research· Dec 10, 2025 · 11mo agoPosted 321 days ago
New York City
In office
Full-time
Mid
$160K–$200K
3+ years exp
Before you apply
Ghost Signal:
Open since December 10, 2025 — 321 days, and still accepting applications.
Job description
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
Application prep
Use the role’s language and application details while tailoring your materials.
Keywords to mirror
aiapireacttypescriptpythonllmsqlnext.jsml
- Platform
- ashby
- Effort
- quick