Senior Billing & Sales Administrator (ADV)

At the company, we’re not just building a CRM. With our technology, we’re helping millions of organizations build lasting relationships with their customers.

From emails and SMS to WhatsApp, Chat, and Marketing Automation, our tools are intuitive, powerful, and built to scale with every ambition. We give businesses a clear view of the customer journey, so they can focus on what matters: connection.

As a certified B Corp, we’re proud to grow with purpose, committed to high standards of social and environmental impact, not just performance.

Today, more than 500,000 businesses across 180 countries—from NGOs like Amnesty International to global brands like Carrefour, eBay, Louis Vuitton, and Michelin—trust the company to engage their audiences, cut through complexity, and deliver results. Our reliable technology and 75+ integrations help them create unparalleled customer experiences, without the usual tech headaches.

We recently exceeded 200m ARR and reached a major milestone by becoming a Unicorn, backed by strong growth and global expansion - and we’re just getting started!

Within the company, the Finance Department ensures that the company has, at all times, the financial resources required for its development. It guarantees that the company growth remains sustainable and profitable.

The Sales Administration plays a key role in addressing three major challenges for their assigned customer portfolio:

Build and maintain trust-based relationships with clients regarding all billing matters.

Ensure that billing processes are aligned with accounting rules and contribute to their continuous improvement & ensure the Cash collection

Support the sales team throughout the customer relationship lifecycle.

This position is hybrid or remote within France!

Your impact at the company

• Client Relationship Management (Billing Focus)

• Give clients clarity on the company's billing model and respond to inquiries on contractual terms, pricing, and invoices.

• Support sales in resolving billing disputes; proactively flag billing errors, unpaid invoices, or budget overruns to clients and sales teams.

• Manage administrative follow-up of Order Forms, contracts, and POs.

• Billing Process Management

• Register and manage Enterprise subscriptions; issue manual invoices per contract terms, delivered services, and pricing grids.

• Support monthly closing by preparing the list of invoices/credit notes to issue (1st of each month), ensuring recognized revenue matches delivered services.

• Monitor outstanding payments using accounting team data.

• Cash Collection

• Execute cash collection: monitor, prioritize, and follow up on overdue accounts via email, phone, and other channels (including AI-generated alerts) to reduce overdue receivables and improve cash flow.

• Resolve and mitigate risk: resolve payment disputes and negotiate payment plans with Sales, CS, Finance, and Operations; anticipate risks and address root causes of delays; manage insolvency proceedings and submit claims when required.

• Continuous Process Improvement

• Continuously improve billing and collection processes and tools, proposing enhancements, staying current on best-in-class solutions, joining efficiency working groups, and building AI agents and KPI dashboards to automate work and track performance.

• Sales Support

• Onboard new clients on the billing process; assist with PO entry, collection, and budget tracking.

This list of tasks is not exhaustive and may evolve based on business needs.

Who you are

• You have 10+ years of experience

• Expertise in billing and invoicing processes

• Experience with billing systems and tools

• Strong financial and accounting knowledge

• Proficiency in English is mandatory

• Rigorous and detail-oriented

• Strong communicator and a team player

• Adaptable and responsive to shifting priorities

Why people love working at the company

• A place to grow, together :  Join an international team in a bright, collaborative office located in a vibrant neighborhood.

• Practical perks for everyday balance:  RTT days off, 50% public transport reimbursement, Sustainable Mobility Package (whether you ride a classic bike or go electric, we support your choice to commute greener) and daily Swile meal vouchers (€ 12.50/day) .

• Learning, every step of the way:  Access to English classes and 155,000+ courses on Udemy, plus a strong internal culture of knowledge-sharing and support.

• Flexible for life :  A remote-friendly setup, budget to support your home workspace, and relocation assistance for international talents.

• Wellbeing that works :  Top-notch private healthcare (70% covered), 6-week second-parent leave, extra time off if your child is sick and needs you, and Several services related to prevention, health and personal and professional well-being on Welii platform

• A culture that cares :  From inter-office trips to regular team events, there are plenty of ways to connect beyond your day-to-day. You’ll also find active social, green, and LGBTQIA+ communities, plus Work Council benefits via Leeto, all here to support what matters to you, inside and outside of work.

Our candidate journey

• Introductory TA call of 30 min

• Interview with our Sales Admin Manager (45 min)

• On-site interview with our the team

• Final get2know with our CFO

Whoever you are, wherever you’re from, if this role speaks to you, we’d love to hear from you.