Full-Stack Engineer

WHAT WE'RE BUILDING We're empowering small teams with technology that makes it easier to market and grow businesses. Our current focus is to help consumer brands shift from "workflow automation" to "agent management" within their marketing operations. Shadow is the AI coordination layer — providing shared AI memory, centralized agent control, and model orchestration for marketing teams. WHY JOIN SHADOW? - Product Ownership You'll ship production code daily and help steer key product and technical decisions. - Shape the Engineering Culture You'll influence how we work—tools, processes, standards, and hiring. - Work with Challenger Consumer Brands Talk directly to customers (CEOs, CMOs, VP's) of fast-growing consumer brands—some doing $80M–$500M in revenue. THE AGENCY BEHIND THE PRODUCT Shadow is built alongside Darkroom — a performance marketing agency that's been operating for 10 years, employs 100+ people, runs 100+ clients at a time, and has worked with over 1,000 consumer brands. The agency is both our proving ground and our first user, which means the data you build with is real marketing data at real volume from day one — not a synthetic demo. This is a fully remote role supporting a team in the EST time zone (9 AM–5 PM EST). THE ROLE You'll sit squarely at the intersection of back‑end and front‑end, ensuring seamless integration between APIs, databases, UIs, and ML services. You'll design, build, and scale features end‑to‑end, especially our AI/ML‑powered experiences, while mentoring peers and driving architecture decisions. Core Tech & Tools - Languages & Frameworks: Python, Node.js, React (TypeScript) - Datastore: PostgreSQL - Cloud & Infra: Google Cloud Platform, Airflow, Terraform, Docker, Kubernetes - ML/AI: LLMs, RAG, prompt engineering WHAT YOU'LL OWN - Architect and implement full‑stack features, from database schema to React components, optimized for scale and reliability. - Build and maintain RESTful/GraphQL APIs, data pipelines, and distributed serv