People Operations Working Student (m/f/d)

People Operations Working Student (m/f/d)

📍 Location: Berlin (on-site)
🕒 Working Hours: 20h/week 

About the Role

Hello👋I am Tamta, People and Culture Lead at Kayzen, and we’re expanding our team with an exciting opportunity for a People Operations Working Student to join us!

But wait, you have not heard of Kayzen before?😃

Kayzen is a mobile demand-side platform (DSP) dedicated to democratizing programmatic advertising. We enable leading apps, agencies, media buyers, and brands to run programmatic customer acquisition, retargeting, and brand performance campaigns through its self-serve and managed service options. Built on the three core pillars of performance, transparency, and control, Kayzen powers the world’s best mobile marketing teams with bespoke solutions that fuel business growth and deliver a competitive advantage. With an unprecedented scale of 160B+ daily ad requests from 1.6B+ unique users worldwide, we serve up to 1B+ ads per day in 180 countries. Kayzen is accessible through our APIs and user interface.

The Team

At Kayzen, you’ll be part of a diverse and inclusive People & Culture team that values creativity, collaboration, and continuous learning. We’re passionate about building an environment where people thrive—personally and professionally. As a team with hubs in Berlin and Bangalore, we collaborate across time zones and welcome fresh perspectives to help shape Kayzen’s culture and employee experience.

The Role

As a People Operations Working Student, your core focus will be office coordination and administrative support across people operations. You’ll play a key role in ensuring our Berlin office runs smoothly and support HR processes that contribute to an outstanding employee experience. You’ll take ownership of various tasks—ranging from organizing office operations and supporting new joiner onboarding, to managing HR documentation and assisting with travel and visa processes. This role is a great opportunity to gain hands-on experience in the inner workings of a modern and international People & Culture function. The position is on-site at our Berlin-Mitte office.

Key Responsibilities

Office Coordination

• Be the main point of contact for the building management and vendors to ensure smooth day-to-day operations
• Maintain a tidy, well-stocked, and welcoming office environment
• Coordinate office access, handle post and deliveries, and support with ad-hoc needs

Event & Engagement Support

• Help plan and execute team events, cultural initiatives, and employee engagement activities. 
• Assist with logistics, setup, coordination, and communication with internal and external stakeholders.
• Support travel and visa-related admin for international employees and visitors 
• Assist with collecting documents, coordinating appointments, and booking tickets
• Keep track of follow-ups and open tasks

HR Admin & Personio Support

• Regularly clean up and maintain accurate records in our HRIS (Personio), ensuring data accuracy of personnel data.
• Assist in regular system audits
• Help properly storing physical employee documents and files
• Prepare employee amendments, certificates of employment and other documents.

Onboarding Coordination

• Schedule onboarding meetings across departments and time zones
• Coordinate equipment and IT access for new joiners
• Ensure a smooth and welcoming onboarding experience for every new team member

What You Bring

• You are currently enrolled in a Bachelor’s or Master’s program in Berlin
• Fluent in German and English (written and spoken)
• Strong interest in HR, people operations, and administrative processes
• Reliable, detail-oriented, and highly organized
• A proactive mindset and a passion for making things run smoothly
• Comfortable multitasking and working independently in a dynamic, international team
• Available to work 20 hours/week on-site at our Berlin office

What do we offer?

• A unique opportunity to gain real-world experience in HR and operations
• Daily collaboration with a passionate, international team
• Direct exposure to leadership and strategic projects
• A €500 annual learning & development budget
• A fun and inclusive work culture—with colleagues across Germany, India, Argentina, Ukraine, Spain, the UK, and beyond