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R&D Mechanical Engineer Senior

2 days ago Sofia, Bulgaria

Join Hitachi Energy and help shape the next generation of On-Load Tap Changers (OLTCs), motor drives, and transformer accessories through innovative mechanical design. As a Senior R&D Mechanical Engineer, you will lead the development of high-performance electromechanical products, transforming requirements into reliable, manufacturable, and cost-effective solutions. Working closely with cross-functional teams, you will drive product innovation, continuous improvement, and technical excellence throughout the product development lifecycle. You will play a key role in advancing technologies, solving complex engineering challenges, and ensuring the highest standards of quality and reliability. This is an exciting opportunity to make a lasting impact on critical power infrastructure while contributing to a more sustainable energy future.

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How you'll make an impact

  • Act as the lead mechanical design engineer for new product development, product upgrades, and technology development projects related to On-Load Tap Changers (OLTCs), motor drives, and transformer accessories.
  • Develop innovative design concepts that meet customer, functional, reliability, manufacturability, cost, and serviceability requirements.
  • Drive continuous improvement initiatives for existing products focusing on reliability, performance, manufacturability, quality, cost, and sustainability.
  • Lead mechanical design reviews and provide technical recommendations throughout the development lifecycle.
  • Support laboratory testing, prototype evaluations, product validation, and qualification activities.
  • Define test objectives, test setups, acceptance criteria, and verification plans.
  • Participate in root cause analyses of field failures, production issues, and customer complaints, identifying corrective and preventive actions.
  • Participate in FMEA, risk assessments, and technical reviews for new products and product modifications.
  • Collaborate closely with materials, electrical, manufacturing, quality, service, and supply chain teams.
  • Develop and maintain design guidelines, best practices, lessons learned, and engineering standards.

Your background

  • Bachelor's or Master's degree in Mechanical Engineering or a related engineering discipline.
  • Significant experience in mechanical design and product development within industrial equipment, power systems, electromechanical products, or related industries.
  • Knowledge of design for manufacturability (DFM), design for assembly (DFA), reliability engineering, and cost optimization principles.
  • Proficiency in 3D CAD modeling, engineering drawings, geometric dimensioning and tolerancing (GD&T), and product data management systems.
  • Experience developing engineering documentation, specifications, test plans, design standards, and technical reports. Understanding of material selection, mechanical calculations, tolerance analysis, fatigue, wear, and failure mechanisms.
  • Experience supporting prototype development, laboratory testing, product validation, qualification activities, and design verification processes. Strong analytical and problem-solving skills, including experience with root cause analysis and corrective action implementation.
  • Working knowledge of risk assessment methodologies, including FMEA and product design reviews.
  • Good written and spoken English.

What we offer

  • 13th salary;
  • Monthly food vouchers;
  • Supplementary health insurance;
  • Additional bonuses.

More about us

Join Hitachi Energy and work in a team that is dedicated to creating a future where innovative digital technologies allow greater access to cleaner energy!

Applications will be reviewed on an ongoing basis, so don't delay - apply today!

Apply now

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Client-provided location(s): Sofia, Bulgaria
Job ID: Hitachi_Energy-JID3-216825
Employment Type: FULL_TIME
Posted: 2026-09-19T19:19:24

Perks and Benefits

  • Health and Wellness

    • Health Insurance
    • Dental Insurance
    • Vision Insurance
    • Life Insurance
    • Short-Term Disability
    • Long-Term Disability
    • FSA
    • HSA With Employer Contribution
    • Pet Insurance
    • Mental Health Benefits
    • Virtual Fitness Classes
    • On-Site Gym
  • Parental Benefits

    • Fertility Benefits
    • Family Support Resources
    • Birth Parent or Maternity Leave
    • Adoption Assistance Program
  • Work Flexibility

    • Flexible Work Hours
    • Remote Work Opportunities
    • Hybrid Work Opportunities
  • Office Life and Perks

    • Commuter Benefits Program
    • Snacks
    • Some Meals Provided
    • Company Outings
    • Holiday Events
  • Vacation and Time Off

    • Paid Vacation
    • Unlimited Paid Time Off
    • Paid Holidays
    • Personal/Sick Days
    • Summer Fridays
  • Financial and Retirement

    • 401(K) With Company Matching
    • Performance Bonus
    • Relocation Assistance
    • Financial Counseling
    • Stock Purchase Program
  • Professional Development

    • Tuition Reimbursement
    • Learning and Development Stipend
    • Promote From Within
    • Mentor Program
    • Access to Online Courses
    • Lunch and Learns
    • Work Visa Sponsorship
    • Leadership Training Program
    • Internship Program
    • Associate or Rotational Training Program
    • Professional Coaching
    • Shadowing Opportunities
  • Diversity and Inclusion

    • Diversity, Equity, and Inclusion Program
    • Employee Resource Groups (ERG)

Company Videos

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