Senior Full Stack Engineer

We're working with a cutting-edge platform that empowers the world's most innovative companies to enhance their AI agents through human feedback. This rapidly growing company is shaping the future of autonomous agents by collaborating with leading AI organizations to train Large Language Models (LLMs) for complex, real-world architectural workflows.The Role Develop objective and verifiable criteria to evaluate system performance and ensure strict functional requirements are met. Review system logs and "trajectories" to refactor code, improve execution paths, and achieve optimal reliability. Test systems for vulnerabilities, including improper data exposure, unauthorized access, and edge-case failures. Contribute expertise to train generative AI models and advance the capabilities of autonomous systems.What You'll Need 2+ years of experience in backend engineering, AI automation, or complex systems integration. Proven ability to build and maintain production-grade software with modular separation. Strong command of at least two major programming languages (e.g., Python, JavaScript, Go, or Java). Experience working with SQL databases and building for live, non-mocked environments. Practical experience handling multi-turn system interactions. Outstanding attention to detail and the ability to provide clear, high-density technical feedback.What's On Offer Opportunity to shape the future of autonomous agents and generative AI. Fully remote, freelance role with flexible hours. Competitive project-based compensation, with additional incentives. Be part of a dynamic team at the forefront of AI innovation.Apply via Haystack today!