Senior Order to Cash Accountant — Finance, Sofia

Sofia, Bulgaria | Full-time

See our Sofia office

Team description

The Order to Cash (O2C) team sits at the heart of SumUp's Finance function, managing the full revenue cycle — from invoice creation and payment collection through to period-end close, accounts receivable, and revenue recognition. As SumUp's Enterprise and Marketplace channels grow fast, the complexity of our billing operations is increasing, and this role is essential to keeping those processes accurate, compliant, and scalable. You'll take full ownership of some of our highest-impact billing workstreams, acting as the go-to expert for Enterprise partners and marketplace channels at a moment when getting this right really matters.

What you'll do

• Own end-to-end billing and reconciliation for marketplace channels (Amazon, eBay, OnBay, TEMU), including settlement posting, AR/AP netting, and discrepancy resolution
• Act as the single point of contact for Enterprise and Cooperation hardware billing, managing invoicing, payment follow-up, and revenue recognition across key partner accounts
• Calculate and book price protection credits and contractual discounts, validating compliance with partner agreements and ensuring accurate margin reporting
• Oversee the full RMA returns process for retailers, partners, and enterprise accounts, applying credit-memo logic and end-to-end control checks
• Perform impairment calculations, ageing analysis, and bad debt allowance support, ensuring compliance with GAAP and internal controls
• Mentor junior team members and proactively identify opportunities to improve processes as automation initiatives evolve

You'll be great for this role if you have…

• Strong knowledge of GAAP, with hands-on experience applying it to complex accounting transactions including journal entries, reconciliations, and trend analysis
• Experience managing high-volume accounts receivable processes, including billing, payment allocation, and resolution of complex discrepancies
• Ability to prioritise and manage multiple high-impact workstreams independently, maintaining accuracy in a fast-moving and evolving environment
• Comfort working with large volumes of transactional data and advanced Excel skills; familiarity with SAP and European VAT is a strong advantage
• Proven ability to build trusted relationships with commercial stakeholders such as Key Account Managers or Business Development teams, acting as a reliable finance partner

Why you should join SumUp

Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our modern Sofia office. This involves an office-first setup

Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusi