Accounts Receivable Associate

About Proton

Join Proton and build a better internet where privacy is the default

Proton was founded in 2014 by scientists from CERN on a simple truth: privacy is a fundamental human right. Since then, we’ve built the world’s largest encrypted email service (Proton Mail) and expanded into Proton VPN, Proton Drive, Proton Pass, and Proton Calendar—tools used by millions globally to protect their freedom, fight censorship, and keep their data safe. In some situations, Proton has literally helped save lives!

We are profitable, independent (no VC control), and selectively hire from the top ~1% of applicants. Our 700+ team members across 50+ countries come from leading organizations and elite academic backgrounds. We move fast, keep hierarchy light, and prioritize impact over optics. If you want to do meaningful work with exceptionally high-caliber people, this is it. Join us and do work you can truly be proud of. Check our open-source projects here!

About the Role

We are looking for an Accounts Receivable Associate to run our end-to-end invoicing process for our B2B business. This role is suited for someone who is highly organized and enjoys bringing consistency and structure to how they operate. This is a hands-on role with room to shape how billing operates as the business scales.

What you will do:

Prepare, review, and issue customer invoices for SaaS subscriptions, renewals, one-time fees, service charges, and MSP-related billing items.
Create invoices using contracts, order forms, pricing agreements, sales notes, usage records, and internal billing instructions.
Check customer billing details, including invoice addresses, VAT/tax information, payment terms, purchase order requirements, pricing, billing cycles, and discounts.
Track invoices from request through creation, approval, dispatch, correction, and follow-up.
Coordinate with Sales, Finance, Customer Success, and Operations to confirm billing details and resolve missing or unclear information.
Respond to customer billing questions and investigate invoice discrepancies, missing purchase orders, disputed charges, or incorrect billing details.
Maintain billing trackers and reports showing invoice status, pending actions, billing exceptions, and overdue items.
Follow up on outstanding invoices via email and phone, and escalate overdue accounts to Finance or leadership in line with collections policy.
Process and record incoming payments and reconcile against open invoices.
Support month-end billing checks and reconciliation between sales records, platform usage, invoices issued, and finance records.
Identify billing gaps, duplicate billing risks, incorrect charges, or missed revenue opportunities.

What we are looking for:

2-5 years of experience in billing, invoicing, accounts receivable, finance operations, revenue operations, or administrative finance support.
Strong with numbers and comfortable working across high volumes of data accurately.
Able to read and work from contracts, order forms, pricing tables, and billing instructions.
Comfortable following up persistently but professionally on outstanding invoices and overdue accounts.
Strong written and verbal communication skills; English fluency is a must.

What We Offer

Work that Matters: millions of people trust Proton with their privacy. We answer only to our users — not advertisers, not investors with conflicting agendas, not governments. The work you do here is real, and the impact is measurable. (read more about our impact here)
Stock Options: at Proton, we all have the opportunity to be owners of the company. From day one, you have a real stake in what we're building. When Proton wins, you win.
Technology: you'll get the right hardware and the right software you need to do your best work.
Learning & Development: we invest in your growth because sharp people make us better. Proton is one of the fastest ways to accelerate your career because you'll be thrown into real challenges, with real ownership, from day one.
Employee Benefits: your wellbeing isn't an afterthought. We offer strong health coverage, solid retirement options, generous leave, and wellness support so you can bring your best self to work every day
In-Person Collaboration: Amazing things happen when passionate, smart, and purposeful people get together in the same room. With offices across Geneva, Zürich, Barcelona, London and more, you'll spend most of your time collaborating face-to-face with people who genuinely care about what they're building
Food: Lunch and snacks are on us every day in our offices so you can focus on the work and not on what's for lunch.
Transport: getting to the office shouldn't cost you. We cover public transport, bike allowances, or parking, whichever works for you.
Flexible Working: you own your schedule. Set hours that work for you and your team — because outcomes matter more than when the clock says you started.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.