about us
tozero is Europe’s leading deep-tech startup specializing in the recycling of lithium-ion batteries. Committed to securing critical raw material independence and regenerating materials, we are developing innovative and sustainable solutions for a cleaner future.
what we're looking for
We are looking for an experienced (Senior) Manufacturing Engineer (m/f/x) to join our growing technical team.In this role, you will focus on the industrial-scale demo plant and support the industrialization of our hydrometallurgical recycling technology in an operational environment. You will work across equipment integration, detailed engineering, commissioning, start-up, and ramp-up to help translate technical concepts into reliable plant operations. This is an exciting opportunity to take ownership in a fast-paced startup environment and contribute directly to the deployment of cutting-edge recycling technology.
what you can expect

- Support the engineering, commissioning, start-up, and ramp-up of our industrial-scale demo plant

- Develop and refine manufacturing and plant concepts, including process layouts, block flow diagrams, and mass and energy balances

- Translate technical and process requirements into robust operational solutions for industrial-scale implementation

- Contribute to pre-feasibility, detailed engineering, and plant execution activities, including process flow diagrams (PFDs), piping and instrumentation diagrams (P&IDs), and layout development

- Prepare technical specifications and data sheets for key equipment procurement

- Collaborate with internal teams, suppliers, and external partners to define technical requirements, milestones, and deliverables

- Plan and execute pre-commissioning, commissioning, start-up, and ramp-up activities

- Support troubleshooting and optimization of plant performance, reliability, and operability

- Plan and execute tests and validation activities on the industrial-scale demo plant

- Use simulations and engineering calculations to validate assumptions and support implementation decisions

- Test and qualify equipment at both company and supplier sites

- Help structure technical workstreams and project activities to achieve milestones on time and within scope

- Work closely with cross-functional teams across engineering, operations, and project execution

your profile

- 5+ years of experience in manufacturing, process, production, or industrial engineering, ideally in chemicals, mining, metallurgy, recycling, or related industries

- Strong hands-on experience with commissioning, start-up, and ramp-up activities in an industrial environment

- Experience working on industrial plants, demonstration plants, or scale-up facilities

- Familiarity with industrial process equipment such as pumps, valves, tanks, piping systems, and other plant infrastructure

- Experience with engineering documentation such as PFDs, P&IDs, BFDs, technical specifications, and change management systems

- Proficiency in process modeling, simulation, and engineering calculations

- Strong troubleshooting and problem-solving skills in operational and project settings

- Ability to work independently while collaborating effectively with cross-functional teams

- Ideally familiar with industry-relevant standards and regulations such as PED, ATEX, Machinery Directive, REACH, Seveso, ISO 9001, and ISO 14001

- German language skills are a plus

- Passion for sustainability and interest in cleantech, manufacturing, and battery recycling

why us?
At tozero, we believe in creating a supportive and dynamic work environment where you can grow, contribute, and make an impact.

- Fitness Subscription: Prioritize your well-being with a complimentary fitness subscription, promoting a healthy and active lifestyle.

- Education Budget: We encourage continuous learning and development. Benefit from an education budget to enhance your skills and knowledge.

- Free Snacks and Drinks in the Office: Stay energized throughout the day with a variety of snacks and beverages.

- Jobticket: Conveniently commute to work and all around Germany with our fully subsidized Deutschlandticket.

- Dynamic Startup Environment: Thrive in a highly dynamic startup culture, collaborating with experts in the field and contributing to innovative projects that shape the future