Lead Engineer Stack

Department: Engineering
Location: Alphen aan den Rijn (Netherlands)
Working day: Full time
Sector: Energy
Vacancies: 1
Discipline: Engineering
Work modality: On site

AQUABATTERY

AQUABATTERY is a climate-tech start-up, based in the Netherlands. Our vision is to empower the transition to net-zero by providing the world’s most scalable, sustainable and safe long duration energy storage solution. We do so through our revolutionary technology, which enables the storage of electricity in just saltwater. The world will need high volumes of energy storage to enable reliance on renewable energy sources like solar PV and wind energy, even if the sun does not shine or the wind does not blow. Our technology has been successfully demonstrated through several pilot installations in the Netherlands and in Italy. Our international team reinforces our impact-focused culture every day; taking on challenges and celebrating successes together. If you are excited to know more, check out our open positions to join the ride!

For more information visit AQUABATTERY Website and YouTube

Job description

Join AQUABATTERY today, a pioneering climate tech startup with a mission to commercialise a affordable, safe and sustainable long duration energy storage (LDES) based on saltwater. Our innovative flow battery technology offers an LDES solution without relying on critical or toxic raw materials.

With fresh funding secured and our first commercial product on the horizon, this is an exciting time to become part of our growing team and contribute to building a cleaner, more resilient energy future.

As the Lead Engineer Stack, you bring specific hands-on experience in stack development to AQUABATTERY and translate it into manufacturing-ready outcomes. You own the technical roadmap for the membrane stack, create focus on concrete deliverables, and connect stack development to internal requirements. Your value lies in generating technical drawings of the membrane stacks and battery system, knowing what has already been solved in industry, finding the right manufacturing partners and components within our cost constraints, and giving the team the structure and direction it needs to deliver.

What you’ll be doing

Define and maintain the technical roadmap for the stack track across all projects, translating requirements into concrete, deliverable-focused milestones
Identify and qualify manufacturing partners and suppliers capable of delivering stack components, including multi-polymer systems and complex assemblies, within defined budget and cost targets
Develop and manage supply chain relationships for stack components, prioritising manufacturing-ready solutions over custom development
Create system-level CAD drawings from concepts and requirements, including P&ID, 3D models, and production-ready blueprints, at component, stack, and full system level
Translate technical outcomes and R&D progress into specific, buildable deliverables that meet project requirements
Distribute activities across projects to ensure milestones are achieved within delivery time, budget, and quality requirements
Maintain comprehensive progress tracking and ensure visibility of the track’s status to internal stakeholders
Proactively identify and raise technical risks before they impact project delivery
Ensure technical documentation, design files, and test records are maintained to a high standard

Requirements

Master in Physics, Mechanical Engineering or Civil Engineering with 5+ years industry experience
Proven experience in development of multi-layer product assemblies
Supply chain experience: identifying, qualifying, and managing manufacturing partners for complex precision components
Proficiency in system-level CAD: P&ID, 3D modelling, and production-ready documentation, from early concept through to manufacturing blueprint
Experience in water processing, water treatment, or adjacent fluid-handling industries
Ability to translate complex technical and manufacturing constraints into a structured, prioritised roadmap
Proven track record of creating team focus and connecting technical outputs to specific, deliverable outcomes
Experience working in a milestone-driven R&D or product development environment
Strong documentation and technical communication skills
Experience in energy storage, electrochemistry, or membrane technology is a strong advantage

Why AQUABATTERY?

The opportunity to provide vital support to the energy transition at our state-of-the-art ETCA facility
A collaborative, multicultural work environment where practical observations and technical insights are valued
A structured, performance-driven culture that supports professional growth and technical skill development
Competitive salary plus Stock Appreciation Rights (SARs)
Work-life balance, including 25 vacation days and flexible working arrangements
Green pension scheme (50% employer contribution) and collective health insurance discount
Company bike for commuting
Regular team events and opportunities to shape the future of clean energy

Excited to join? Get in touch with us today!

Department: Engineering
Location: Alphen aan den Rijn (Netherlands)
Working day: Full time
Sector: Energy
Vacancies: 1
Discipline: Engineering
Work modality: On site

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