HR & Onboarding Administrator

Flatpay is one of Europe's fastest-growing fintech companies and we've recently launched in the UK.

Role: HR Administrator

Location: 5 days a week - London, White City

The HR Administrator is the operational backbone of the Flatpay UK People team, keeping onboarding, records, and employee queries running accurately at pace.

Responsibilities

Coordinate end-to-end onboarding logistics for up to 100 new starters per month, including accommodation, catering, and travel for multi-day cohort programmes

Create and configure new starter profiles on Personio ahead of day one, ensuring all data is accurate, complete, and compliant

Collect and verify pre-employment documentation, including right to work, signed contracts, and new hire information

Draft and issue contract variation letters for role changes, promotions, salary adjustments, and department transfers, with same-day HRIS updates

Process leavers in Personio, coordinating with payroll to ensure accurate final pay and completing all off-boarding steps on time

Serve as first point of contact for standard employee queries, providing clear, accurate answers grounded in the Employee Handbook

• Maintain onboarding trackers, employee records, and people data accurately across the full employee lifecycle
• Skills & Attributes
• Exceptional organisation and attention to detail, comfortable managing high volumes simultaneously

Clear, professional communicator, written and verbal, with the confidence to give employees straightforward answers on policy and process

• Comfortable working to tight deadlines in a fast-moving, high-growth environment
• Calm under pressure, able to prioritise without dropping the ball
• Collaborative and reliable, understands that clean admin is the foundation everything else is built on
• Our Values

At Flatpay, how we work matters as much as what we achieve.

Happy Humans - We bring energy to our work and create teams people enjoy being part of.

No Assholes - We perform at a high level while treating colleagues and customers with respect.

It's Our Business, Own It - Everyone takes responsibility and manages their work like it's their own business.

Start With No - We challenge ideas, think commercially and focus on what truly creates value.

Sky-High Ambitions - We set bold goals and expect people to keep raising the bar.

The Best Argument Wins - Titles don't decide outcomes. We debate openly to reach the best decisions.

Background & Requirements

1 to 2 years of administrative experience in a fast-paced environment; HR experience is an advantage but not required

Demonstrably organised and detail-focused, able to give examples of managing high-volume, time-sensitive tasks accurately

• Confident using systems and technology; prior HRIS experience (Personio, HiBob, or similar) is a plus but not essential
• Fluent in English
• Right to work in the UK (unfortunately we can't offer visa sponsorship right now)
• Hiring Process
• Application Review – Our Talent Team reviews your CV to assess experience and potential fit

Talent Screen (20 to 30 minutes) – A call to understand your background, organisational approach, and why this role interests you

Manager Interview – A conversation with the Senior People Partner to go deeper on experience and culture fit

Offer