In the Finance team we are seeking an experienced

ACCOUNTS PAYABLE ADMINISTRATOR (24-32 HOURS/WEEK)

to join our growing team and work from our office in Leiden.

You will join our Finance department as an AP Administrator. Your role will focus on processing invoices, solving processing issues, processing payments, and reviewing employee expenses, as well as continuous process/system improvements to automate the work as much as possible. During the week you will contribute 40% of your time to processing invoices, 20% of your time liaising via mail and telephone with vendors/ internal stakeholders, 10% of your time processing and applying payments, and 20% of your time on ad-hoc accounting and administrative tasks, including employee expense reviews.

To summarize, you will:

• Process invoices and ensure accuracy of data

• Manage vendor relationships and resolve any issues that arise

• Reconcile accounts payable transactions and subledgers

• Running weekly payment run for SEPA countries and international transfers

• Managing expenses and credit cards

• Assist with month-end closing and other accounting tasks as needed

• MBO level combined with a good understanding of numbers

• Related work experience within Accounts Payable/ Receivable

• Good understanding of Microsoft Excel and any Accounting System

• Good written and oral communication skills in English

• Being organized and having an eye for detail.

What we offer:

• Contribute to the development of next generation medicines providing protection against airborne viruses

• Flexibility – a healthy work-life balance

• A stimulating working environment with an enthusiastic team

• International environment - with more than 20 nationalities in the company

• Attention and possibilities for personal and professional growth

The team works a hybrid on-site schedule, and 1-2 days on-site in the office are required. Ideally our new AP Administrator starts June 2026, but we are willing to wait for the best candidate, so we understand you have a notice period or already planned your annual leave.

This position is open to candidates currently residing in the Netherlands with an existing EU work authorization.

We are an equal opportunity employer, so we firmly believe in the added value of a diverse and inclusive group of people with one common goal. We are looking for people who can make an impact and work on a purpose, together.

To all agency recruiters given the important work our employees do, I kindly request that you do not approach our people directly. At Leyden Labs, all vacancies are filled with internal efforts, and external support is not required at this time.