Senior Real-Time Backend Engineer (Python, AI)

Supersonik seeks Senior Engineers to join our core team in Barcelona. You will tackle complex technical problems, shape product architecture from day one, and thrive in a fast-growing startup. You should be fluent in modern Python, async programming, and adept at building scalable, event-driven systems. You’ll work across frontend to infrastructure to deliver high-performance demos. If you love first-principles thinking, ambiguity, and delivering products people love, you’ll fit right in with J…