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# Fullstack Engineer

- **Company:** COFOUNDER PARTNERS, LLC
- **Location:** New York, NY, United States
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** Data Analysis, Cloud Computing, Profiling, Software Quality, Continuous Integration, Programming Tools, Design of User Interfaces, PostgreSQL, Redis, Next.js, Systems Integration, TypeScript, WebSocket, ReactJS, Large Language Models, Backend, Fastapi, Event Driven Architecture, Integration Tests, Front End Software Development, Webhooks
- **Published:** September 4, 2026
- **Apply:** https://startup.jobs/fullstack-engineer-cofounder-the-general-intelligence-com-8121607

## About the Role

* 4+ years building and shipping user-facing products end to end
 * Frontend: React/Next.js (or equivalent), TypeScript; component-driven development, performance profiling, accessibility, data fetching/state, optimistic UI and cache invalidation
 * Backend: Python FastAPI, background workers/queues, webhooks, Postgres (or similar) schema design, transactions, migrations
 * Solid testing and observability habits (unit/integration tests, metrics, traces, structured logs)
 * Bias to ship: scope thin slices, deliver quickly, instrument, iterate

Nice to have

 * Event-driven architectures (Inngest/Temporal), WebSockets/real-time UIs
 * LLM/agent experience: tool-use patterns, prompt hygiene, guardrails, evaluation
 * Infra familiarity (Render/Modal/Supabase/Redis Cloud or equivalent), CI/CD, feature flags

## Description

* End-to-end product work across the agent experience: flows, integrations, and UI/UX
 * Flows: creation, editing, run criteria, execution reliability, and observability
 * Integrations: add new integrations and deepen existing ones
 * UI/UX: work on novel, interesting ways of building human<>agent interactions
 * Product sense for complex UX: making powerful systems feel simple and reliable
 * Ship features across the stack with a tight feedback loop from real users (frontend + backend)
 * Improve performance, reliability, and cost across agent runs and flow execution
 * Build instrumentation, analytics, and developer tooling to speed up iteration
 * Maintain a high bar for code quality, tests, observability, and documentation


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