We seek two experienced members for our team, with a background in Computer Science. The candidates will participate in the R&D activities of FORTH in the context of the project “Enabling Circular Value Chains via Production Digitization and Human Empowerment” (ENCIRCLE) (Grant Agreement number: 101178230), funded under Horizon Europe, HORIZON-CL4-2024-TWIN-TRANSITION-01 (RIA). ENCIRCLE is coordinated by ETHNIKO KENTRO EREVNAS KAI TECHNOLOGIKIS ANAPTYXIS (CERTH), Greece, and FORTH-ICS is a member of the project consortium. The project proposes a novel framework for environmental impact assessment via Digital Twins and Soft Sensors, incorporated in a virtual production line. Utilizing this virtual environment as a simulation and training space for AI, ENCIRCLE will decarbonize manufacturing, searching for sustainable production configurations and designs that reduce environmental footprint without compromising quality. This virtual space will be used for workforce training through gamification, cultivating new skills and fostering a new circular mindset. ENCIRCLE will follow a human-centered design and propose a symbiotic ecosystem of humans and AI through explainable Human-in-the-Loop methodologies.