Mechanical Engineer

Who We Are

Sparkmate is a tribe of fearless makers solving the world’s most pressing problems with hard tech and industrial solutions. Our goal is to transform the $1.5T global steel industry and secure critical supply chains through the complete electrification of primary ironmaking, entirely eliminating the need for fossil fuels and coal-burning blast furnaces.

Utilizing a proprietary, low-temperature electrochemical process, we split raw iron ore directly into oxygen and >99.9% (3N+) ultra-pure solid iron—the critical raw material anchoring the future of EV motors, wind turbines, robotics, and defense. While incumbents spent 10 years and $450M to reach 1 tonne/day of continuous production, we built our 1-tonne/day continuous architecture from scratch in just 12 months for under $2M. We are now scaling from our Stage 1 pre-pilot to a 3–10 tonne/day autonomous factory in Hong Kong before deploying modular plants in the US and Europe. We are looking for makers, builders, and innovators ready to turn this vision into reality.

What We're Looking For

• Full-Stack Systems & Mechanical Designer: Deep expertise in systems engineering, structural integration, fluid dynamics, and heavy industrial process machinery design.
• Master of the Workshop: Extensive hands-on experience with advanced manufacturing equipment, welding, precision machining, and rapid-prototyping fabrication techniques.
• Harsh Environment Materials Knowledge: Strong first-principles understanding of material selection, structural integrity, and mechanics under conditions involving elevated temperatures, structural loads, and corrosive chemical environments.
• Extreme Agency & Execution: A proven track record of owning complex mechanical projects independently from blank-sheet CAD concepts through to physical installation and continuous uptime.
• Clear Communication & Team Sync: Ability to translate complex mechanical engineering challenges into ultra-clear, actionable technical insights for our cross-functional robotics and chemistry teams.
• Bonus: Direct experience designing large-scale industrial factory plant equipment, chemical processors, or multi-axis automated machinery is a massive plus.

Why Join Us?

• Take advantage of an in-house precision machine shop, CNC/3D printing infrastructure, and direct proximity to the world’s fastest electronics and manufacturing supply chain, backed by the budget to build industrial systems from scratch with zero red tape.
• Flat hierarchy, radical truth, zero corporate politics, and extreme ownership.
• Perks & Support: Competitive salary: 32,000-42,000 HKD + meaningful early-stage equity, full Hong Kong work visa sponsorship, daily team lunches, comprehensive healthcare coverage, and 25+ days of annual leave.

Start Date: 9 November 2026 or sooner

Location: 1 Kin Hong St, Kwai Chung, Hong Kong

Application Process (no traditional CVs):

We only hire builders. Standard CVs tell us how well you navigate a corporate ladder; they don't tell us what you can actually create. To stand out, include the following in your application and send to forge@sparkmate.com:

1. Proof of Work: Links, portfolios, photos, or videos of experimental setups, electrochemical cells, reactors, or technical projects you have physically built or optimized with your own hands.

2. The Most Impressive Thing You’ve Done: Tell us about the most extraordinary feat you have ever achieved (professional, technical, personal, or athletic) and how you pulled it off.

3. Why Sparkmate: Why do you want to spend your time and talent ending the fire age with us?

Or you may also visit https://sparkmate.com/ and enter your email address in the email box.