👋 About us

sunday is building the fastest and simplest way to pay at a restaurant. By simply scanning a QR code, guests can pay, leave a tip and go in about 10 seconds. We believe the best products should be obvious, not complicated, and we focus relentlessly on simplicity while earning the trust of restaurants and guests with every interaction. Today, sunday makes payments easier in thousands of restaurants across the United States, the United Kingdom and France, helping venues speed up table turnover, increase tips and unlock valuable data. We push ourselves to go beyond expectations, with a strong sense of ownership, fast execution and ambitious growth.

About the role

sunday is a fast-growing start-up that needs to build structure across many areas at the same time. The teams have a roadmap of fixes to address the root causes of debt, but they are currently operating at full capacity.

In the meantime, someone needs to take the lead: contain the debt, reduce it, and flag anything that needs to be fixed. That is the role of this internship.

Key responsibilities

Manage debt through data

• Track debt levels every week and keep monitoring tools up to date.

• Quickly get up to speed with our software (billing, payments, CRM, spreadsheets) and infrastructure, even if you have not used them before.

• Build your own working routine to handle accounts consistently and efficiently.

• Automate anything you can at your level (AI, AI Agent).

Collect payments from customers

• Call customers with outstanding debt and conduct conversations that are polite but firm.

• Use your judgment: know when an account has received enough warnings and when action is needed, without letting a delaying account manager stall the process.

• Balance suspending an account against the risk of churn.

• Escalate to Account Managers when the situation calls for it.

Investigate and improve processes

• Analyze debt cases to identify their causes: they vary from one account to another.

• Distinguish recurring patterns from one-off exceptions, and flag anything that points to a deeper issue.

• Direct the relevant teams to the right topics: RevOps, Customer Experience, Account Management, Tech, Payments, and Finance.

Own the Financial Operations

• Own day-to-day US financial operations, including invoice processing, customer billing, payment tracking, and vendor and customer communication.

• Improve and automate finance workflows, tools, and controls as sunday scales across multiple markets.

• Approve & submit employee expense reports & vendor invoices for the US team guided by the US Director of Finance.

About you

Education and experience

• Business school student.

• At least one previous internship experience is required.

• Comfortable with digital tools and able to quickly learn new software.

Soft skills

• You are not afraid to pick up the phone and can remain courteous while standing your ground.

• You have good judgment: you know when to insist, when to act, and when to escalate.

• You are patient, resilient, and resourceful when faced with situations that are never quite the same.

• You are mature and agile, and know how to adapt your communication to your audience, whether customers or internal teams.

• You have an investigative mindset: you seek to understand the cause of a problem, not just address it.

• You are independent and able to organize your work.

What we offer

• A unique learning experience surrounded by exceptional people, with caring support to help you build your career

• A comfortable office in the heart of Paris

• €1,250 monthly stipend

• Meal vouchers (Tickets Restaurant)

• 50% reimbursement of your public transport pass

Interview process

• Let’s get to know each other in a phone interview

• Impress your future colleagues with a case study

• Chat with teams from other departments and discover our culture

• One reference check with a former manager and offer: we’d love to welcome you to the team

Thank you for taking the time to apply, we can’t wait to get to know you!

sunday is an equal opportunity employer and does not discriminate. All qualified applicants will be considered without regard to race, creed, color, sex, sexual orientation, gender identity or expression, gender, ethnic origin, religion, national origin, ancestry, nationality, age, disability, marital status, veteran status, genetic information or any other characteristic protected by law (except where a characteristic is a bona fide occupational requirement).