About °Celsi
°Celsi is a growing Australian technology company specialising in temperature monitoring and food safety compliance solutions. We serve restaurant groups and food businesses across Australia and Singapore — including national chains — helping them meet their regulatory obligations through smart, connected IoT devices and cloud-based reporting platforms.
We're a small, close-knit team that values ownership, clear communication, and getting things done. This is an opportunity to join at an early stage and grow with the business.
The Role
We're looking for a highly organised, detail-oriented Administration & Finance Support Officer to keep the day-to-day operations running smoothly. The majority of this role is financial administration — primarily managing invoicing and accounts receivable in Xero, and proactively following up customers on outstanding or overdue accounts. You'll be the person who ensures our billing stays on track and customers are kept informed.
Approximately 20% of the role involves outbound calls and follow-up emails to prospective customers — warm leads rather than cold calling. If you're comfortable picking up the phone and having professional conversations, you'll be well-suited to this part of the position.
This is a flexible, part-time role ideal for someone based in Cairns who takes pride in owning their work and doesn't need to be micromanaged.
Key Responsibilities
1. Manage invoicing, payments, and