The Role
The Staff Accountant will support monthly close activities, process improvements, and collaborate on building out the controllership function, emphasizing automation and modern accounting tools.
Summary Generated by Built In
Flex is building a finance super app for premium business owners — reimagining every single aspect of the financial workflow and financial services for any entrepreneur. The company has grown revenue 25x+ since publicly launching in September 2023 and is on track to achieve profitability by late 2025. Flex is focused on mid-market businesses ($3 - $100M revenue) that are largely overlooked by existing fintech solutions and reliant on slow and outdated regional banks. We are targeting a ~$1T revenue opportunity that is largely up for grabs.
We are looking for a Staff Accountant who is eager to go beyond traditional accounting tasks. This role is perfect for someone with a solid foundation in accounting (education or 0–2 years of experience) who is passionate about process innovation and excited to leverage the best technology stack to automate and streamline our month-end close. You’ll play a key role in supporting the monthly close, building out the controllership function, and contributing to broader initiatives across the finance and accounting team.
✅ What You’ll Do
- Support the monthly close process by preparing journal entries, reconciliations, and financial reports
- Collaborate on process improvements to automate and optimize close activities using modern accounting tools
- Assist in building out the controllership function, ensuring accuracy, compliance, and scalability
- Partner with finance leadership to implement best practices in accounting and reporting
- Contribute to cross-functional projects that enhance efficiency and strengthen financial operations
- Engage with cutting-edge technology to modernize workflows and reduce manual effort
⚡️ What You Bring
- 0–2 years of accounting experience or equivalent academic foundation in accounting/finance
- Strong understanding of accounting principles and financial reporting basics
- Interest in process innovation and automation, with a desire to work on modern accounting tech stacks
- Detail-oriented and organized, with the ability to manage multiple priorities during close cycles
- Collaborative mindset and eagerness to learn from and contribute to a growing finance team
- Proactive problem-solver who thrives in a fast-paced, high-growth environment
Why Join Us
Flex is growing quickly — you’ll help shape the direction of a product and company with real momentum.
We’re well-capitalized with strong backing and a clear long-term vision.
You’ll work with a sharp, driven team that values autonomy, clarity, and quality.
Join ambitious builders who care deeply about winning together — and having fun while doing it.
Annual team on-sites. From Bogota to Mexico City, the entire Flex team gets together once a year to align and build camaraderie.
Top Skills
Modern Accounting Tools
Technology Stack
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The Company
What We Do
End-to-end finance platform for businesses
