Darkroom is hiring a Full Stack Engineer to own the systems that make AI agents work. You'll build the backbone of a platform where marketers configure agents and trigger complex workflows.

What You'll Do

Own full-stack features end-to-end — from database models and APIs to frontend integration and UX correctness.
Design and extend backend systems that power complex agent orchestration — subagents, skills, knowledge base retrieval, parallel execution, and long-running workflows.
Build and evolve REST APIs that are stable, well-typed, and easy for the frontend and agents to consume.
Integrate and debug LLM-powered workflows — prompts, tools, retrieval, evaluation loops — with a strong focus on reliability and observability.
Ensure frontend and backend systems interoperate cleanly: tight contracts, predictable data flow, and minimal friction.
Improve performance, resilience, and security across the stack as usage and complexity grow.
Use coding agents (Claude Code, Cursor, etc.) as force multipliers to move faster and push quality higher.
Collaborate closely with product and design to turn ambiguous ideas into shipped, production-grade features.
Raise the technical bar through thoughtful code reviews, architectural discussions, and mentorship of junior engineers.

What We're Looking For

5+ years of professional software engineering experience with end-to-end ownership in a full-stack role.
Strong hands-on experience with Python and/or Node.js on the backend and React + TypeScript on the frontend.
Deep understanding of front-end state management — how to structure, scope, and evolve state as complexity grows. Familiarity with patterns like React Query / TanStack Query for server state.
Experience designing and working with relational data models (PostgreSQL).
Comfort operating in a cloud environment (GCP or similar) and deploying containerized services (Docker; Kubernetes familiarity a plus).
Proven experience integrating AI/ML systems into production products — especially LLMs, retrieval-augmented workflows, or agentic systems.
Strong product instincts: you think about UX, performance, and correctness, not just implementation.
Ability to reason about complex systems and make them simpler, more reliable, and easier to work with.

Nice to Have

Prior experience at an early-stage startup or as a founder.
Background working on AI-powered or data-intensive products.

Technical Stack

React + TypeScript frontend
Node.js and Python backend services
PostgreSQL (and Redis where appropriate)
Google Cloud Platform
Dockerized services (Kubernetes familiarity helpful)
LLMs from OpenAI, Anthropic, and open-source models
Agent orchestration, retrieval, and evaluation systems built in-house

Team & Environment

You'll report directly to the CEO and work alongside a small team of engineers and designers who ship daily and operate with high autonomy.

Benefits & Compensation

$200,000 – $250,000 base salary per year + equity
Unlimited Vacation & 10 Paid Holidays
Comprehensive Medical, Dental & Vision Benefits
401(k) with Company Match, Equity, and Profit Sharing
Parental Leave & Wellness Stipends
Cross-functional learning opportunities across the entire Darkroom ecosystem

Work Mode

This is a remote-first role with team hubs in NY, SF, Lisbon, São Paulo, Barcelona and more.

Darkroom is an equal opportunity employer committed to diversity and inclusion across race, religion, gender identity, age, disability status, and background.