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