Lead Engineer Stack

AQUABATTERY

Alphen aan den Rijn

On-site

EUR 90,000 - 130,000

Full time

3 days ago

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Benefits offered by this job

Stock Appreciation Rights (SARs)

25 vacation days

Flexible working arrangements

Green pension scheme

Health insurance discount

Company bike for commuting

Job summary

AQUABATTERY is seeking a Lead Engineer Stack to own the membrane stack technical roadmap and translate it into manufacturing-ready outcomes. You will generate CAD drawings, connect stack development to internal requirements, and identify manufacturing partners within cost constraints.

This role focuses on delivering concrete, milestone-driven results for an innovative saltwater flow battery platform. The position offers a collaborative, performance-driven environment with opportunities to shape

Qualifications

5+ years of industry experience in stack development or related field.
Proven ability to design multi-layer product assemblies.
Experience identifying, qualifying and managing manufacturing partners.

Responsibilities

Define and maintain the technical roadmap for the stack track across all projects.
Identify and qualify manufacturing partners and suppliers for stack components.
Develop and manage supply chain relationships for stack components.
Create system-level CAD drawings and production-ready blueprints.
Translate R&D progress into buildable deliverables and milestones.
Ensure milestones are met within time, budget, and quality constraints.
Maintain documentation and test records to high standards.

Skills

5+ years experience

Multi-layer assemblies

Supply chain experience

CAD (P&ID & 3D)

Water processing knowledge

Technical communication

R&D milestone-driven mindset

Education

Master in Physics, Mechanical Engineering or Civil Engineering

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 theLead 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.

About the role

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

Function 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