Product Developer & Project Engineer

Who We Are

For more than a century,
AAF International has been protecting something essential: the air we breathe
. Since 1921, we have led the development of air filtration solutions that support cleaner, safer and more efficient industrial and energy environments.

Today, we operate in 22 countries with over 3,000 people driven by a shared purpose:
delivering clean air where it matters most
.

Within our Power & Industrial Division
, we are now looking for a Product Developer / Project Engineer based in Spain who wants to play an active role in shaping technically robust, customer-focused solutions with real environmental impact.

As a Product Developer / Project Engineer
, you will be a key technical partner throughout the full project lifecycle — from bidding and concept definition to product development and industrialisation.

You will connect customers, engineering, operations, supply chain, product management and sales
, ensuring solutions are not only technically sound, but also competitive, compliant and aligned with business goals.

This is a role for someone who enjoys ownership, cross-functional collaboration and turning complex requirements into practical, high-quality solutions
.

• Deliver engineering activities on time and with high technical quality (calculations, functional descriptions, drawing reviews, documentation).
• Ensure compliance with internal standards, contractual requirements and applicable regulations.

• Define technical specifications and develop conceptual designs.
• Perform engineering calculations and simulations to validate feasibility and performance.
• Lead prototyping and testing activities, driving continuous design improvement.
• Collaborate with manufacturing to define efficient production processes and optimise costs.
• Prepare technical documentation, specifications and certification dossiers.
• Support product launches and provide technical expertise to internal and external stakeholders.

• Work closely with Sales teams during the bidding phase to clarify and validate technical requirements.
• Translate customer needs into achievable, competitive technical solutions.

• Apply AAF standard procedures to meet both customer expectations and internal requirements.
• Prepare technical contract documentation, including clarifications, deviations and exceptions.

• Degree in Engineering or a related technical discipline.
• 3–5 years of experience as a Product Developer or Project Engineer in an industrial or engineering environment.
• Solid understanding of engineering principles and methodologies.
• Ability to influence, communicate and collaborate across functions.
• Advanced English (C1) and Spanish required; additional languages are an advantage.

• Professional Growth
  : access to a 24/7 online learning platform and opportunities to grow within an international organisation.
• Flexibility & Trust
  : flexible working hours (Monday–Thursday), shorter Fridays, and the choice to have lunch at home or in our company canteen.
• Work–Life Balance
  : policies designed to support sustainable performance over time.
• International & Purpose-Driven Environment
  : work in a multinational company with a strong commitment to environmental responsibility.
• Open Culture
  : your ideas and expertise contribute directly to how we evolve as a business.

Join AAF International and become part of a team that believes in the power of people to transform the air — and the future
.