About Us

Cast AI is the leading Application Performance Automation (APA) platform, enabling customers to cut cloud costs, improve performance, and boost productivity – automatically.

Built originally for Kubernetes, Cast AI goes beyond cost and observability by delivering real-time, autonomous optimization across any cloud environment. The platform continuously analyzes workloads, rightsizes resources, and rebalances clusters without manual intervention, ensuring applications run faster, more reliably, and more efficiently.

Headquartered in Miami, Florida, Cast AI has employees in more than 32 countries worldwide and supports some of the world’s most innovative teams running their applications on all major cloud, hybrid, and on-premises environments. Over 2,100 companies already rely on Cast - from BMW and Akamai to Hugging Face and NielsenIQ.

What’s next? Backed by our $108M Series C, we’re doubling down on making APA the new standard for DevOps and MLOps, and everything in between.

Core values that hold us all together:

PRACTICE CUSTOMER OBSESSION. Focus on the customer journey and work backwards. Strive to deliver customer value and continuously solve customer problems. Listen to customer feedback, act, and iterate to improve customer experience.

LEAD. Take ownership and lead through action. Think and act on behalf of the entire company to build long-term value across team boundaries.

DEVELOP AND HIRE THE BEST. Strive to raise the performance bar by continuously investing in yourself, the team and by hiring the best possible candidates for every position. Drive towards personal development and professional growth, and mentor others to raise the collective bar.

EXPECT AND ADVOCATE CHANGE. Strive to innovate and accept the inevitable change that comes with innovation. Constantly welcome new ideas and opinions. Share insights responsibly with unwavering openness, honesty, and respect. Once a path is chosen, be ready to disagree and commit to a direction.

Role overview

We’re a hyper-growth SaaS company seeking a detail-obsessed, proactive Billing Associate to ensure our global invoicing engine runs smoothly. You’ll partner with Finance, Sales, Customer Success, and Legal teams to manage customer invoicing, subscription changes, contract billing terms, and revenue reporting—delivering accurate, timely billing and an exceptional customer experience.

• Invoice processing: prepare and issue accurate invoices based on customer contracts and usage data
• Marketplace billing: assist with billing and reconciliation for sales through third-party marketplaces (e.g AWS, Azure, GCP) ensuring compliance with each platform’s invoicing requirements
• Customer’s contract data: Maintain and update billing records for new contracts, upgrades, downgrades, and renewals
• Inquiry resolution: resolve billing inquiries from Sales, TAMs, and customers within SLA targets
• Month-end close: assist with billing cut-off, revenue reconciliations, and reporting
• Collections: support outreach to customers for overdue accounts and follow up on payments
• Ad-hoc administration: handle tasks such as customer account setup, vendor form processing, and audit support
• Process improvements: contribute to testing and implementations of process automations

Requirements

• Based on the US East Coast
• Able to collaborate effectively across EU and US time zones
• 2–3 years of experience in billing, accounts receivable, or order management - SaaS experience a plus
• Familiarity with billing systems and marketplaces is preferred
• Advanced Excel / Google Sheets skills (vLookups, Pivot tables)
• Meticulous attention to detail and a strong customer-first mindset
• Experience with SaaS metrics (ARR, MRR)
• Exposure to CRM systems like Salesforce
• Familiarity with revenue recognition principles

What's in it for you?

• Team of highly skilled professionals to work with and learn from

• Impact and visibility. Our organization is flat, getting in touch with CEO or CTO is a common practice here

• Flexible working hours. We deliver instead of sitting in the office 8 to 5

• Skin in the game. Every employee gets a share of the company

• 10% time to focus on self-improvement or personal projects.