Wiit

Billing and Commercial Support Specialist

Wiit

part-time

Posted on:

Location Type: Hybrid

Location: Düsseldorf • Germany

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Job Level

Junior

About the role

  • Support the team in operational billing and invoicing management.
  • Prepare and review invoices, and process invoice corrections and credit notes.
  • Maintain and manage customer and contract data.
  • Serve as the first point of contact for B2B and B2C customers regarding billing-related inquiries.
  • Support accounts receivable management (e.g., resolving outstanding items).
  • Perform general administrative tasks within the commercial/finance area.

Requirements

  • Commercial/administrative background (e.g., vocational training, professional experience, or equivalent qualification).
  • Ideally some initial experience with invoice generation, customer contact, or commercial processes.
  • Confident user of MS Excel.
  • Careful, structured, and reliable working style.
  • Strong team skills, excellent communication, and self-initiative.
  • Conversational German and good English (spoken and written).
Benefits
  • Appreciative team with flat hierarchies and an informal first-name culture.
  • Experienced manager as direct contact, focusing on structured onboarding, clear task allocation, and sustainable development.
  • Reliable processes and a professional work environment that enables efficient, focused work in a part-time model.
  • Attractive part-time compensation with additional benefits.
  • Flexible working hours and the option to work remotely after onboarding.
  • Lively, modern office in the heart of Düsseldorf with good public transport connections.
  • Free drinks and snacks for a healthy start to the day or that extra morning coffee.
  • Various benefits such as the Deutschlandticket (public transport pass), childcare subsidies, E-Gym/Wellpass, BusinessBike, or Givve — the prepaid card with your monthly credit.
  • Employee events, vouchers, and discounts.
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
invoice generationbilling managementaccounts receivable managementdata management
Soft Skills
strong team skillsexcellent communicationself-initiativecareful working stylestructured working stylereliable working style
Certifications
vocational trainingprofessional experience