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STABL Energy • Munich, Bavaria, Germany
Role & seniority: Test Engineer (seniority not explicitly specified)
Stack/tools: BESS system validation; ECAD support (e.g., EPLAN); PLC programming; Python; system integration across electrical, software, thermal, and safety domains
Plan, execute, and document system- and subsystem-level BESS tests; verify cross-domain integration; conduct functional, performance, and regression tests
Build and scale the testing function: define processes, standards, tooling; contribute to future testing infrastructure and roadmap; enable knowledge transfer
Documentation and compliance: maintain traceability; support CE/EMC and certification tests; provide feedback to engineering for continuous improvement
Degree in Electrical Engineering, Mechatronics, or similar
Experience in testing, validation, commissioning, or troubleshooting complex systems
Strong understanding of industrial electrical systems, safety, and system integration
Practical PLC programming and/or Python skills
Analytical, documentation, and problem-solving abilities; hands-on with prototypes/hardware
Experience with BESS, ECAD tools (e.g., EPLAN), or PLC systems (ideally WAGO)
Experience with ECAD/Wiring diagrams, wiring integration
Location & work type: Flexible/work model; hybrid setup; remote work possible (including abroad) per company policy
Your Role We are looking for a skilled and analytical Test Engineer (m/f/d) to drive system-level validation of our Battery Energy Storage Systems (BESS). You will help build the foundation of our testing function by defining processes, infrastructure, and tools as production scales. The role focuses on validating complete BESS and key subsystems to ensure functionality, reliability, and safe integration of mechanical, electrical, and software components. Additional tasks may include ECAD support, PLC logic implementation, and development of EoL/FAT tooling. Your mission System & Subsystem Testing Plan, execute, and document system- and subsystem-level BESS tests. Verify integration of electrical, software, thermal, and safety systems. Conduct functional, performance, and regression tests. Analyze deviations and support troubleshooting and root-cause investigations. Develop scalable test procedures and contribute to the long-term testing roadmap. Building the Testing Function Help establish internal testing processes, standards, and tooling. Support definition of future testing infrastructure and methodologies. Enable knowledge transfer and, over time, support additional testing staff. Documentation & Compliance Maintain accurate test documentation and traceability. Support CE/EMC and other certification-related tests. Provide structured feedback to engineering teams for continuous improvement. Additional Engineering Tasks
ECAD Support: Assist with wiring diagrams, component integration, and prototype electrical reviews.
PLC Programming: Support PLC logic implementation and communication/I/O configuration.
EoL/FAT Tooling: Contribute to automated test processes, device integration, and reporting. Your profile Degree in Electrical Engineering, Mechatronics, or similar. Experience in testing, validation, commissioning, or troubleshooting complex systems. Strong understanding of industrial electrical systems, safety, and system integration. Practical skills in PLC programming and/or Python. Strong analytical, documentation, and problem-solving skills.
Optional: Experience with BESS, ECAD tools (e.g., EPLAN) and/or PLC systems (ideally WAGO). Methodical, structured, detail-oriented working style. Hands-on mindset and comfort with prototypes and hardware. Strong communication and cross-functional collaboration skills. Proactive and process-oriented, with interest in shaping a growing testing function. Why STABL Energy? STABL Energy is one of the most innovative start-ups in the energy transition, ees Award winner and named a global Top100 Energy Start-up. We are funded by renowned and experienced Tech VCs from Germany, Denmark and Switzerland.