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Billing Coordinator (12 months contract)

Criticalmass

San Jose, Costa Rica (San Jose) permanent

Posted: February 9, 2026

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Job Description

A a Billing Coordinator, you support the Financial Analytics Team to manage and oversee the billing processes. Your primary duties include preparing and issuing invoices, tracking and recording payments, resolving billing disputes, generating financial reports, and ensuring compliance with company and client policies. You’re eager to put your outgoing personality to the test by gaining experience in effective team communication. And you’ll grow in your role with key guidance and mentorship from Finance Director(s).

This is a 12 months contract.

You Will:

• Create invoices for clients including pre-bills, internal drawdowns and pulling necessary back up

• Reconcile time system against client invoices created

• Manage reimbursable tracker, create reimbursable invoices and consolidate reimbursable backup

• Follow up with team for reimbursable vendor invoice approvals and adjust reimbursable expenses in accounting system as required

• Maintain time system for clients and projects including project creation and management, hour movements, billing rates and titles

• Run and follow up on missing timesheet reports

• Assist with processing Accounts Payable bills, includes issuing POs for vendors and matching the vendor invoices to correct POs and securing approvals

• Review and process employee expense reports in Concur

• Adhere to accounts payable standards and policies

• Reconcile and process the corporate credit card, travel credit card, and petty cash

• Perform general office duties including: filing invoices, photocopying of bills, invoices, and other supporting backup documentation

• Ad-hoc reporting as required

You Have:

• Accounting knowledge coupled with strong technical skills

• Proficiency with MS Office suite of products: Excel, Word and Outlook

• Familiarity with foreign currency

• Exceptional attention to detail

• Experience with Microsoft Dynamics AX or equivalent financial accounting system would be an asset

• Excellent communication skills, both written and verbal

• Self-motivated and able to work with limited supervision

What We Offer

• Maternity and parental leave extra days

• Competitive benefits packages

• Vacation, compassionate leave, sick days, and flex days

• Access to free online services for families and new parents

• Diversity and Inclusion Board with 12 affinity groups

• Internal learning and development programs

• Enterprise-wide employee discounts

• And more…

At Critical Mass, we value our employees and offer competitive compensation and benefits packages. If you’re looking for a challenging and rewarding opportunity to make a significant impact on the lives of our employees, we encourage you to apply for this exciting position today!

The Talent Team at Critical Mass focuses on providing the best training, onboarding, and employee experience possible! Our new hires & employees are the future of our organization, and we want to set you up for long-term success. In an effort to do so, we expect our team to work from an office a minimum of 3 days a week.

Critical Mass is an equal opportunity employer.

Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.

The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.

If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx

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