Senior Process Engieer

About this role

ABOUT US tozero is Europe’s leading deep-tech startup specializing in the recycling of lithium-ion batteries. Committed to accelerating decarbonization and transforming the material life cycle, we’re actively crafting sustainable recycling solutions for a cleaner and more innovative future. WHAT WE'RE LOOKING FOR We are looking for a Senior Process Engineer to take a leading technical role in the design, scale-up, commissioning and ramp up of our battery recycling processes.

This role sits at the intersection of technology development, process engineering, and industrial scale-up. You will translate experimental and operational data into robust process designs, challenge engineering assumptions, and ensure that our future plants are built on solid fundamentals. Your focus will be on the processes that matter most to our technology — graphite and lithium extraction. By working closely with R&D, Operations and external engineering partners, you will actively lead and engage in activities associated with: a) engineering design; b) commissioning and ramp up; c) process development.

We are looking for someone who is comfortable working in a production environment, but who can also take a step back and understand what the data is telling us, and engineer the process we need at different scales. WHAT YOU CAN EXPECT Must Have's: 1. Future Plant Design & Scale-up ● Own key process design activities for our next-generation plants. ● Develop and review PFDs, P&IDs, mass and energy balances, process descriptions and equipment specifications for future capacity expansions.

● Translate pilot and industrial operating data into reliable engineering design criteria and scale-up assumptions. ● Perform process calculations and equipment sizing to ensure our future plants are designed based on validated engineering data rather than theoretical assumptions alone. 2. Targeted Process Expertise & Optimization ● Become a technical reference for some of our most critical process steps. ● Apply strong chemical engineering fundamentals to the optimization of graphite and lithium extraction and post-processing.