Finance & Administrative Manager

Stealth Startup (Deep Defense Tech); Düsseldorf; Hybrid; EUR 30,000 - 50,000; Part time

Benefits offered by this job

Competitive salary

Hybrid work model

Dynamic and flexible work schedule

Extreme growth opportunity

Job summary

A defense technology startup in Düsseldorf seeks a part-time Finance & Administrative Manager to oversee bookkeeping and financial administration. This role demands precision and discretion, requiring several years' experience in finance roles and proficiency in financial documentation. The position supports the founders and external advisors, ensuring scalable financial processes. Competitive salary, hybrid model, and dynamic growth opportunities are offered to the right candidate.

Qualifications

• Several years of experience in bookkeeping, finance, or back-office roles.
• Strong understanding of financial documentation standards and administrative processes.
• High level of accuracy, reliability, and discretion.
• High level of accuracy, reliability, and discretion.
• Structured, independent, and solution-oriented working style.
• Fluency in German; English proficiency is a plus.

Responsibilities

• Manage preparatory bookkeeping and accounts payable/receivable.
• Create and review invoices, process payments.
• Coordinate expense management and travel reimbursements.
• Digital document and receipt management.
• Coordination with external tax advisors and payroll providers.
• Preparation of monthly financial overviews and reporting summaries.
• Maintenance and continuous improvement of internal financial processes.
• Administrative support for the founders (e.g., scheduling, travel coordination, document preparation).
• HR-related administrative support (contract administration, personnel documentation, payroll coordination).

Skills

Bookkeeping

Financial administration

Experience with DATEV

Fluency in German

German fluency

English proficiency

Education

Commercial training or comparable qualification

Tools

DATEV

Job description

Employment Type: Part-Time (15–25 hours per week)

Start Date: As soon as possible

Finance & Administrative Manager

Location: Düsseldorf (Hybrid)

About Us

We are a defense technology startup based in Berlin, building the next generation defense layer against aerial threats. Our team develops mission-critical systems that combine hardware, software, and sensing to operate reliably in complex real-world environments.

As an early-stage company, we work in stealth mode and place a strong emphasis on engineering rigor, ownership, and clean operational structures.

Role Overview

We are seeking a Finance & Administrative Manager (Part-Time) to take ownership of our bookkeeping, financial administration, and selected executive and HR-related administrative processes.

This is a high-trust role working directly with the founders and external tax advisors. You will ensure that our financial processes are structured, compliant, transparent, and scalable as the company grows.

The position requires a high level of precision, discretion, and reliability, with a strong focus on clean documentation, process stability, and financial clarity.

Key Responsibilities

• Preparatory bookkeeping (accounts payable and receivable)
• Invoice creation, invoice review, and payment processing
• Expense management and travel reimbursement coordination
• Digital document and receipt management
• Coordination with external tax advisors and payroll providers
• Preparation of monthly financial overviews and reporting summaries
• Maintenance and continuous improvement of internal financial processes
• Administrative support for the founders (e.g., scheduling, travel coordination, document preparation)
• HR-related administrative support (contract administration, personnel documentation, payroll coordination)

Required Qualifications

• Completed commercial training or comparable qualification
• Several years of experience in bookkeeping, finance, or back-office roles
• Experience with DATEV or comparable accounting software
• Strong understanding of financial documentation standards and administrative processes
• High level of accuracy, reliability, and discretion
• Structured, independent, and solution-oriented working style
• Fluency in German; English proficiency is a plus

Preferred Qualifications

• Experience working in a growing company or technology environment
• Familiarity with HR administration and payroll coordination
• Experience setting up or improving internal financial processes
• Basic understanding of compliance and documentation requirements in regulated industries

What We Offer

• Competitive salary (pro-rated for part-time)
• Hybrid work model
• Dynamic and flexible work schedule
• Extreme growth opportunity in a fast-scaling startup

Who You Are

• Diligent and precise: You work with a high degree of accuracy and care, especially when handling financial data
• Reliable and trustworthy: You understand the sensitivity of financial and personnel information and handle it with discretion
• Structured and organized: You create clarity through clean documentation and well-maintained processes
• Financially disciplined: You value transparency, compliance, and traceability in all financial matters
• Proactive and responsible: You anticipate administrative needs and ensure deadlines are met without constant oversight
• Calm and dependable: You bring stability and order to a growing organization