People Operations and Payroll Assistant

People Operations & Payroll Assistant (Working Student) Join the team behind the employee experience at Sum Up

At Sum Up, our People Operations & Payroll team makes sure every employee has a smooth experience throughout their journey with us — from their first day to their latest promotion, and everything in between.

As Sum Up has grown, so has our team in Spain: we've scaled from around 40 employees to more than 400 in just a few years, and we're looking for a curious and motivated Working Student to grow with us.

If you're interested in HR, payroll, operations, or simply want to understand how people processes work in a fast-growing fintech, this is an opportunity to gain hands‑on experience and make a real impact from day one.

You’ll work alongside experienced People Operations and Payroll professionals, gain exposure to the full employee lifecycle, and develop practical skills that will set you up for a career in HR, Operations, Payroll, or People Analytics.

You’ll learn how a global fintech supports hundreds of employees, manages payroll operations, and continuously improves the employee experience.

• Help prepare and validate payroll data for monthly payroll cycles
• Support communication with our external payroll provider
• Help keep payroll records accurate and up to date
• Spot discrepancies and help resolve them quickly

• Prepare employment contracts and employee documentation
• Support onboarding, contract changes, and offboarding activities
• Assist with benefits administration and employee records

• Respond to employee questions via our ticketing system and email
• Ensure requests are handled quickly and nothing falls through the cracks
• Contribute to creating a great employee experience

• Maintain employee data across our HR systems
• Update reports and trackers
• Help improve processes and reduce manual work
• Support the team with documentation and operational projects

• You’re currently enrolled in a Spanish university and studying HR, Business Administration, Economics
  , or a related field
• You’re fluent in Spanish and English
• You enjoy being organised and paying attention to details
• You’re comfortable working with data and spreadsheets (Excel skills are a big plus!)
• You’re curious, proactive, and eager to learn
• You’re comfortable handling confidential information responsibly
• You enjoy helping others and working as part of a team

• Previous experience or studies related to HR, payroll, or people operations
• An interest in payroll, HR systems, or process improvement
• Experience using AI tools such as ChatGPT to work smarter and automate repetitive tasks

• Real ownership and meaningful responsibilities from day one
• Exposure to HR and payroll operations in an international fintech
• The opportunity to learn from experienced People professionals
• A chance to build skills that will open doors across HR, Operations, and Business functions
• The experience of supporting a team that’s helping shape the employee experience for hundreds of people across Southern Europe

If you’re looking for an opportunity to learn, grow, and get behind the scenes of how a scaling tech company operates, we’d love to hear from you.

Work with a truly global, multicultural team from our Barcelona office.

Be part of a workplace that values diversity and inclusion, where every perspective is respected.

Access our Employee Assistance Programme for mental health guidance and support when you need it.