Design Engineer (Mechanical) – Jupiter Electric Mobility

Jupiter Electric Mobility Hiring | Immediate Joiners Preferred

Position: Design Engineer (Mechanical)
Location: Bengaluru

🔋 Role Overview

We are looking for a Design Engineer (Mechanical) with hands-on experience in lithium-ion battery systems for automotive and railway applications. This role spans the complete product lifecycle—from concept design to production support—focusing on robust, safe, and manufacturable battery cell, module, and pack designs.

🛠 Key Responsibilities

• Design, develop, and optimize mechanical systems for lithium-ion cells, modules, and battery packs
• Create detailed mechanical enclosures, structures, mounting solutions, and integrate BMS and wiring harnesses using 3D CAD tools
• Plan and support prototype builds, including jig and fixture design, supplier coordination, and preparation of drawings, BOMs, and specifications
• Define and execute verification and validation plans; support mechanical testing such as vibration, drop, crush, and penetration tests
• Collaborate with thermal, electrical, manufacturing, and quality teams to optimize pack architecture, cooling, sealing, fastening, and assembly processes
• Lead or support DFMEA, risk assessments, and root cause analysis to improve design robustness and reduce failure modes
• Drive improvements in production equipment, safety practices, quality systems, and technical documentation
• Ensure compliance with internal procedures and applicable industry standards

🎓 Qualifications

• Bachelor’s degree in Mechanical Engineering or a related discipline
• Strong proficiency in 3D CAD modelling and detailing (SolidWorks / CATIA preferred)
• Working knowledge of FEA and analytical methods for mechanical validation
• Experience supporting prototype development and production ramp-up
• Familiarity with CAD and PLM systems for drawings and BOM management
• Good understanding of tolerance analysis, risk assessment, and structured problem-solving tools
• Excellent communication skills with clear ownership of design deliverables

💼 Experience Required

• 3–5 years of experience in mechanical design and manufacturing

• Prior exposure to electromechanical systems, lithium-ion batteries, or energy storage products will be an advantage

📩 How to Apply

Interested and eligible candidates may apply by sending their resume to:
📧 careers@jupiterelectricmobility.com
Subject Line: Design Engineer – Immediate Joiner

Technical Interview Questions & Answers

Design Engineer (Mechanical) 

Q1. Explain your experience in designing lithium-ion battery packs.

Answer:
I have worked on mechanical design of lithium-ion battery modules and packs covering enclosure design, mounting structures, cooling interfaces, and BMS integration. My role involved 3D CAD modeling, drawing release, BOM creation, prototype builds, and production support while ensuring safety, manufacturability, and compliance with standards.

Q2. What factors do you consider while designing a battery pack enclosure?

Answer:
Key factors include structural strength, vibration resistance, thermal management, sealing and ingress protection (IP rating), serviceability, manufacturability, weight optimization, and compliance with automotive/railway safety standards.

Q3. How do you integrate BMS and wiring harness in battery pack design?

Answer:
I ensure proper routing paths, strain relief, connector accessibility, and EMI protection. Adequate clearance is maintained to avoid sharp edges and thermal hotspots, while ensuring ease of assembly and service.

Q4. What mechanical tests are typically performed on battery packs?

Answer:
Common tests include vibration, drop, crush, penetration, thermal cycling, and shock tests. These validate structural integrity, safety, and durability under real-world operating conditions.

Q5. What is your understanding of FEA in battery design?

Answer:
FEA is used to analyze stress, deformation, vibration response, and fatigue life of enclosures and mounts. It helps identify weak points early and optimize designs before prototyping, reducing cost and development time.

Q6. How do you handle thermal challenges in battery pack design?

Answer:
I collaborate with thermal and electrical teams to integrate air or liquid cooling paths, ensure proper heat dissipation, avoid hotspots, and maintain safe operating temperatures for cells.

Q7. What standards are important for lithium-ion battery mechanical design?

Answer:
Standards such as IEC, ISO, AIS, UN38.3, and customer-specific specifications are critical. Compliance ensures safety, reliability, and regulatory approval.

Q8. Explain your experience with prototype development.

Answer:
I have supported prototype builds by coordinating with suppliers, developing jigs and fixtures, addressing build issues, and incorporating feedback into design improvements before mass production.

Q9. How do you perform root cause analysis for mechanical failures?

Answer:
I use structured problem-solving tools like 5-Why, Fishbone analysis, and DFMEA to identify root causes, validate corrective actions, and prevent recurrence.

Q10. What is DFMEA and why is it important?

Answer:
DFMEA identifies potential failure modes early in the design phase. It helps reduce risks, improve robustness, and enhance product reliability before production.

🧠 Behavioral & Process Interview Questions

Q11. How do you manage design changes during production?

Answer:
I assess the impact, coordinate with cross-functional teams, update drawings/BOMs through PLM systems, and ensure controlled implementation without affecting quality or delivery.

Q12. Describe a time you worked with cross-functional teams.

Answer:
I regularly worked with electrical, thermal, manufacturing, and quality teams to resolve design challenges, optimize assembly processes, and meet performance targets.

Q13. How do you ensure design manufacturability?

Answer:
By involving manufacturing early, following DFM/DFA principles, minimizing part complexity, and validating assembly feasibility through prototype builds.

Q14. How do you handle tight deadlines and multiple priorities?

Answer:
I prioritize tasks based on impact, maintain clear communication with stakeholders, and track deliverables using structured planning tools.

Q15. Why do you want to work in battery and EV technology?

Answer:
Battery and EV technologies are critical to sustainable mobility. Working in this domain allows me to contribute to innovative, future-ready energy solutions.

⚡ Practical Scenario-Based Questions

Q16. What would you do if a battery pack fails vibration testing?

Answer:
I would analyze test data, review FEA results, identify weak mounting or structural areas, modify the design, and re-validate through testing.

Q17. How do you balance weight reduction with safety?

Answer:
By using optimized material selection, ribbing strategies, and simulation-driven design while ensuring structural integrity and compliance with safety norms.

Q18. How do you document design work?

Answer:
Through detailed drawings, BOMs, test reports, DFMEA, and controlled documentation in PLM systems to ensure traceability and audit readiness.