Senior Software Engineer (m/f/d) Production Platforms in Aachen

• Your mission
• You build and evolve the operations platform and shopfloor tablet app for goods receipt, inventory and outbound logistics.
• You work with operations to turn an initial request into a clear, proportionate scope, and you recommend holding or declining work when the expected value does not justify the effort.
• You steer our AI development setup and assess the agent’s output carefully and bring your own judgment to decisions about architecture and correctness.
• You move between backend and frontend development: Python with Fast API and async SQLModel on Postgre SQL, alongside React and Type Script.
• You integrate the platform with SAP S/4HANA, Microsoft Entra ID and shopfloor label printers.
• As the platform expands, you strengthen the practices that keep it maintainable. Automated testing, observability and deployment automation are already in place.
• You make architectural choices, capture the reasoning in accessible documentation and contribute thoughtful feedback in code reviews.

Your profile

• You have built software for production use and supported it after release.
• You have practical experience building Python services with an asynchronous web framework, modelling relational data and managing database migrations.
• React and Type Script are part of your hands-on toolkit, and you are comfortable building complete user interfaces.
• You use Docker and CI in your daily development work and you are comfortable working with Linux servers.

Experience with configuration management, reverse proxies and networking is an advantage.

• You can assess AI-generated code and recommendations on their technical merits and make engineering decisions based on your own technical judgment.
• You can turn an unclear operational need into a specific software requirement and discuss it directly with production colleagues.
• You communicate confidently and fluently in German and English, including technical discussions with colleagues on site.
• Experience in production, logistics or the process industry is a strong plus.

Why us?

• You take ownership from day one
• after an intensive onboarding, you'll build something unique with us and shape outcomes with real impact on results.
• You work on something that truly matters
• with your contribution, you strengthen Europe's battery supply chains and make circular economy a reality on an industrial scale.
• You're part of a mission-driven team
• in a fast-paced scale-up environment, we live collaboration, because we can only move things forward together.
• You work to the highest standards
• we combine the professionalism of leading industry with the innovative power of a top-tier, research-driven technology team.
• You grow with us
• at cylib, you will do what is likely to be the most impactful work of your career and develop personally as we scale together.

About us cylib is a German battery recycling company that emerged from research at RWTH Aachen University in 2022.

With an integrated network of sites, we bring together research and development at our headquarters in Aachen, dismantling and mechanical processing in Wernberg-Köblitz, and hydrometallurgical processing in Dormagen (in ramp-up).

Our goal: building a resilient European value chain through the recovery of high-quality materials for sustainable batteries.

With our innovative OLi C technology (Optimized Lithium and Graphite Recovery), we recover over 90% of the contained raw materials – with a CO 2 footprint that is 80% lower than conventional processes. Towards the realization of a true circular economy in the European market.

Interested?

Please upload your documents (a cover letter is not necessay) and answer the questions in the application form.

We look forward to receiving your application!