Senior Fullstack Engineer (AI evaluations platform)

O projekcie: You will be cooperating with a leading provider of AI evaluation and optimization solutions, trusted by multinational companies to optimize AI agents and detect performance issues in large language models. In this role, you will contribute to a product that addresses one of the most important and challenging problems facing society’s adoption of AI today.  Due to the client’s time zone, we would appreciate a candidate who can work until 10:00 p.m.  Join us and make a real impact!  If you’re ready to broaden your horizons and work with an innovative company at the forefront of AI, we’d love to hear from you. You’ll help build the environments that shape how future AI systems are trained, evaluated, and aligned - and collaborate with world-class engineers and researchers on one of the most important technical challenges of our time. Wymagania: - Ability to work 2:00 p.m. - 10:00 p.m. (CEST)- 5+ years building scalable, reliable web applications- Experience with Python and backend frameworks like FastAPI or Django- Practice with modern UI frameworks (React) and TypeScript- Skills in designing REST APIs- Experience with relational databases (PostgreSQL) Nice to have: - BS/MS in Computer Science, Mathematics, Statistics, or a related quantitative field- Experience with Next.js and Material UI- Experience with cloud environments like AWS- Familiarity with vector and columnar databases Codzienne zadania: - Build high-performance user interfaces for LLM evaluation workflows, advanced analytics, search, and data visualizations - Design efficient data models and REST APIs - Architect and implement agentic systems - Develop internal tools and libraries (e.g. a data visualization library) to improve productivity across the engineering team - Treat everything as a work in progress — constantly polish features and iterate on customer feedback - Collaborate closely with cross-functional partners across engineering, design, product, ML, and research