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

Cylib; Aachen; On-site; EUR 65,000 - 95,000; Full time

Job summary

Cylib in Aachen, Germany is seeking a software engineer to build and evolve an operations platform and shopfloor tablet app for goods receipt, inventory, and outbound logistics. You’ll scope requests with operations, guide value-based decisions, and steer AI development with hands-on backend and frontend work.

You’ll work across Python with FastAPI and async SQLModel on PostgreSQL, React and TypeScript, and you will integrate SAP S/4HANA and Entra ID while using Docker and CI in a Linux

Qualifications

• Experience building production software.
• Asynchronous Python services with relational data models.
• Hands-on with React/TypeScript for full UIs.
• Familiarity with Docker and CI in daily work.
• Comfort with Linux servers and networking basics.
• Ability to turn unclear needs into concrete software requirements.
• Fluent in German and English for technical discussions.

Responsibilities

• Build and evolve the operations platform and shopfloor tablet app for goods receipt, inventory and outbound logistics.
• Collaborate with operations to scope requests and advise on value vs effort.
• Steer AI development setup and assess the agent’s outputs.
• Move between backend (Python/FastAPI) and frontend (React/TypeScript).
• Integrate the platform with SAP S/4HANA, Entra ID and printers.
• Improve maintainability with tests, observability and deployment automation.
• Document architectural decisions and provide code-review feedback.

Skills

Python

FastAPI

SQLModel

PostgreSQL

React

TypeScript

Docker

CI

Linux

German-English

Architecture decisions

Tools

SAP S/4HANA

Microsoft Entra ID

Shopfloor label printers

Job description

• 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 FastAPI and async SQLModel on PostgreSQL, alongside React and TypeScript.
• 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.

• 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 TypeScript 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.

• 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.