On-Site Finance & Operations Lead – Rotterdam

AddOptics; Rotterdam; On-site; EUR 42,000 - 66,000; Full time

Job summary

AddOptics in Rotterdam is seeking a hands-on professional to own daily financial administration, purchasing, and operational processes. You’ll ensure data accuracy, manage records, and serve as a trusted contact for the team, external bookkeeper, payroll agency, and partners.

This full-time, on-site role requires a structured, proactive individual who can spot issues early, resolve them, and continually improve administrative workflows while supporting HR, contracts, and office operations.

Qualifications

• Bachelor's degree (HBO or WO) in Business Administration, Finance, Economics, or related field.
• 3+ years of professional experience in financial administration, business operations, purchasing, or a similar role.
• Comfortable working with financial data, administrative systems, spreadsheets, and recurring data entry tasks.
• Independent and resourceful with proactive issue resolution.
• Strong ownership and follow-through on tasks.
• Structured, accurate, and reliable with a broader business perspective.
• Approachable and service-minded for colleagues’ questions and requests.

Responsibilities

• Keep financial administration accurate and up to date across Moss and Exact Online, including data entry, bookkeeping checks, and matching transactions.
• Manage cost centre and cost unit allocations, investigate discrepancies, and ensure financial records are correct.
• Coordinate purchasing, supplier administration, and purchase orders, and track spending against budgets.
• Support monthly financial and shareholder reporting, customer invoicing, payments, and subsidy administration.
• Work with our external bookkeeper, payroll agency, and other partners to resolve questions and keep processes moving.
• Own day-to-day HR administration, support employee requests, and coordinate recruitment and onboarding.
• Manage contracts, NDAs, signature processes, company documentation, and general office matters.

Skills

Data entry

Spreadsheets

Financial administration

Administrative systems

HR administration

Vendor management

Education

Bachelor's degree in Business Administration, Finance, Economics, or related field

Tools

Moss

Exact Online

Job description

AddOptics in Rotterdam is seeking a hands-on professional to own daily financial administration, purchasing, and operational processes. You’ll ensure data accuracy, manage records, and serve as a trusted contact for the team, external bookkeeper, payroll agency, and partners.

This full-time, on-site role requires a structured, proactive individual who can spot issues early, resolve them, and continually improve administrative workflows while supporting HR, contracts, and office operations.