HR Business Partner

• Join Day
• One
• Shaping the Future of Data Infrastructure
• Day
• One is a global leader in the development and operation of high-performance data centers.
• As one of the fastest-growing companies in the industry, we’ve built a robust presence across Asia and Europe — and we’re just getting started.

As we expand into new international markets, we’re looking for talented, driven individuals to join us on this exciting journey. This is more than a job — it’s an opportunity to be a key contributor to our dynamic team and help shape the future of global data infrastructure.

If you're passionate about innovation, technology, and growth, we invite you to be part of DayOne’s next chapter.

The Role

The HR Business Partner will act as a trusted advisor to leaders, aligning people strategy with business priorities while supporting the growth and development of DayOne’s teams in Spain.

This role combines strategic HR partnership with hands-on execution, supporting workforce planning, leadership capability, employee relations and organisational development in a fast-growing environment.

Key Responsibilities

• Partner with business leaders to support organisational growth, workforce planning and team development.
• Act as a trusted advisor to managers on leadership, performance management and employee relations matters.
• Work closely with Talent Acquisition to support hiring plans and onboarding of new employees.
• Support organisational design and capability development as teams scale.
• Champion Day
• One’s culture and help build an engaged, high-performing workplace.
• Ensure HR practices comply with Spanish labour law and company policies.
• Support implementation of global HR programs and initiatives.
• What We’re Looking For6-10 years of HR experience in an HR Business Partner or HR Generalist role.
• Strong knowledge of Spanish labour law.
• Experience partnering with business leaders in fast-growing international organisations.
• Strong employee relations and stakeholder management skills.
• Experience working with an HR Information system, preferably Workday.
• Experience supporting full employee lifecycle from onboarding to offboarding.
• Fluency in English and Spanish, both written and spoken.A proactive, solutions‑oriented mindset, with the ability to navigate ambiguity and work collaboratively across teams.
• Bachelor’s degree in Human Resources, Business Administration, Psychology or a related field (Master’s degree a plus).
• Why join us?
• At Day
• One, you’ll have the opportunity to directly influence how we grow in one of our most important markets.
• You’ll join a diverse, ambitious and supportive global team where your work has real impact — on people, on culture, and on the future of our business.

DayOne is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

If you're ready to grow with one of the fastest-moving companies in the data center industry, apply now and be part of our global journey.

For more information about us, please visit Data Center Company Built For Hyperscale.

DayOne is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

If you're ready to grow with one of the fastest-moving companies in the data center industry, apply now and be part of our global journey.