Diagnostic Engineer

We are seeking a Diagnostics Engineer to support in-vehicle software validation and diagnostics activities prior to vehicle release. The ideal candidate will have hands-on experience in vehicle testing and troubleshooting, along with a strong understanding of vehicle systems, E&E architecture, and automotive communication protocols. Experience with ADAS functions, engine control systems, and vehicle diagnostics is highly desirable.

Key Responsibilities

• Conduct in-vehicle verification and validation (V&V) of software features before market release.
• Prepare, execute, and document vehicle test activities according to validation plans.
• Monitor vehicle behavior during testing and identify software, communication, and system-related issues.
• Analyze diagnostic trouble codes (DTCs), perform root cause investigation, and troubleshoot issues directly on the vehicle.
• Collect, analyze, and interpret vehicle logs and diagnostic data.
• Create detailed defect reports and upload findings, logs, and test evidence to project tracking systems
• Collaborate with software, systems, and hardware engineering teams to support issue resolution and validation activities.
• Verify corrective actions and perform regression testing to ensure issue closure.
• Support validation activities related to ADAS, powertrain, engine control, and other vehicle electronic functions.
• Ensure compliance with project schedules, quality standards, and release requirements.

Required Qualifications

• 3+ years of experience in vehicle testing, validation, or in-vehicle troubleshooting within the automotive industry.
• Strong understanding of vehicle functions and automotive Electrical & Electronic (E&E) architecture.
• Proven experience analyzing and troubleshooting Diagnostic Trouble Codes (DTCs).
• Deep knowledge of automotive communication protocols, including: CAN (Controller Area Network), UDS (Unified Diagnostic Services)
• Experience using diagnostic and logging tools such as CANalyzer, CANoe, Vector tools, or equivalent.
• Familiarity with defect tracking and test reporting processes.
• Strong analytical and problem-solving skills with a systematic troubleshooting approach.
• Excellent communication and teamwork skills.
• Business level English and conversational Japanese (N4+)

Preferred Qualifications

• Experience with ADAS validation and diagnostics.
• Knowledge of engine control systems, powertrain electronics, and vehicle network architectures.
• Understanding of automotive software development and validation processes.
• Experience working in a cross-functional and multicultural engineering environment.
• Ability to analyze complex vehicle-level issues and drive resolution with development teams.