About Us

ACX is international at its heart.

Being international isn’t just what we do — it’s who we are.

With over a decade of experience advising companies, founders and investors, ACX Legal Partners combines senior legal expertise with a practical, business-focused approach.

We are built around the needs of each project. Rather than relying on a fixed team, we assemble the right combination of lawyers and specialists for every matter, adapting the team as the transaction or project evolves

Integrity

We act with independence, honesty and professional responsibility.

Commitment

We take our clients’ objectives seriously and stay personally invested in every matter.

Clarity

We communicate openly, directly and without unnecessary complexity.

Excellence

We hold ourselves to high standards of legal quality, judgment and execution.

Our Mission

We are your Legal Partner for every challenge and every opportunity. Focused on objectives, committed to results.

Aleksandra Czajka

Founder & Lawyer

After more than a decade at leading international law firms, I founded ACX Legal Partners in Madrid to offer international clients a more direct, strategic and flexible approach to high-quality legal advice.

I work closely with clients and remain personally involved throughout each matter. Originally from Poland and based in Spain for the past 17 years, I bring an international perspective shaped by experience across different jurisdictions and legal systems. I am a member of the Madrid Bar Association and a graduate of Pompeu Fabra University, with further studies at the University of Geneva and the University of Illinois. Outside the office, music and sport are an important part of my life.