Senior Backend Engineer (LLM / AI Experience)

Hybrid Tech Team Full-time
Barcelona Spain

• Build and scale backend systems powering conversational AI & digital humans
• Hands‑on senior role balancing architecture production code
• Work deeply with LLMs RAG pipelines and real‑time systems
• Barcelona (hybrid) or remote in Europe 50k65k

Why this role is exciting: Youll shape the backend foundations of a cutting‑edge digital human platform where your architectural and performance decisions directly impact real‑time AI experiences used by enterprise customers.

At UNITH were transforming customer journeys with conversational AI. Listed on the ASX we create lifelike digital humans using cutting‑edge synthetic facial movement, voice engineering and conversational design.

Our digital humans speak 60 languages with <...