About the Opportunity
We're partnering with a stealth AI company building infrastructure that powers reinforcement learning (RL) environments for some of the world's leading AI labs.
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Their systems operate directly within the AI training loop, helping evaluate, improve, and deploy next-generation AI models. This is highly applied, production-focused engineering work with real-world impact.
We're looking for exceptional Full-Stack Software Engineers who thrive in fast-paced environments, take ownership, and can independently ship complete applications from idea to deployment.
What You'll Do
- Build full-stack applications end-to-end (frontend, backend, and infrastructure)
- Transform loosely defined concepts into production-ready products
- Design and implement systems supporting AI agents and RL workflows
- Deliver high-quality software rapidly without sacrificing maintainability
- Collaborate directly with founders, researchers, and engineering leadership
- Own projects from specification to deployment with minimal oversight
How You'll Work
- Operate with a high degree of autonomy and ownership
- Use modern AI coding tools (Cursor, Claude Code, Codex, etc.) to accelerate development
- Review and validate all AI-generated code
- Make architectural decisions independently
- Work primarily through asynchronous communication (Slack)
- Move quickly while maintaining engineering excellence
RequirementsCore Technical Skills
- Strong experience building and shipping complete software products
- Frontend development with:
- React
- TypeScript
- Modern UI frameworks
- Backend development with:
- Python
- FastAPI
- REST APIs & integrations
- Database design and implementation
- System design, debugging, and performance optimization
- Writing clean, scalable, production-quality code
Nice to Have
- Experience with LLMs, AI agents, or AI-powered applications
- Experience building data pipelines or web scraping systems
- Startup, freelance, or rapid-delivery environment experience
- Familiarity with modern AI-assisted development workflows
Idóneo Candidate
You are someone who:
Has built and deployed multiple real-world applications
Can own systems end-to-end without constant guidance
Thinks in systems, not just tasks
Uses AI as a productivity multiplier, not a replacement for engineering judgment
Enjoys solving ambiguous problems and creating structure where none exists
Contract Type
We welcome both freelance contractors and candidates interested in a long-term/full-time opportunity.
The engagement starts with a paid project, allowing both sides to evaluate fit, delivery quality, and collaboration. xhfqzwm High-performing engineers may continue on future projects or transition into a longer-term role.