Planning, execution and evaluation of end-to-end (E2E) and system tests for battery systems (e.g., home energy storage)
Validation of the interaction of all subsystems such as the battery, BMS, inverter, HMI and cloud connectivity
Testing customer interfaces such as the end-customer app, commissioning app, service tool and local user interfaces (HMI)
Performing use-case-based tests across the entire product lifecycle (installation, commissioning, operation, service)
Analysis, documentation and tracking of system faults and close coordination with the respective development teams
Ensuring system stability and performance under various operating and environmental conditions
Building and further developing system test environments and supporting HiL/SiL approaches

Degree in engineering (e.g., Electrical Engineering, Computer Science, Mechatronics) or comparable qualification
Experience in E2E or system testing of complex, interconnected systems (e.g., energy systems, automotive, IoT products)
Understanding of the interaction between hardware, software and cloud systems
Ideally experience with battery systems, inverters or comparable energy systems, as well as communication protocols and interfaces (e.g., CAN, Ethernet, TCP/IP, Wi-Fi)
Structured, analytical and independent way of working
Strong teamwork and communication skills in an interdisciplinary environment
Fluent German and English, both written and spoken

Exciting area of responsibility: Opportunity to contribute to sustainable innovations in the energy transition
Work environment: Permanent employment in a successful family-owned company where new technologies meet a modern workplace culture
Professional growth: Our Viessmann Academy and external partners offer numerous technical and personal development opportunities
Health: We promote wellbeing with our health program for employees and their families
Retirement provision: Plan for the future and benefit from our company pension scheme
Attractive mobility offers through partnerships (e.g., JobBike), which are good for the environment and your wallet
Vacation: At Viessmann Climate Solutions you receive 30 days of paid vacation per year

Test Engineer, Battery System E2E

Key skills