The Staff Accountant will support monthly close activities, process improvements, and collaborate on building out the controllership function, emphasizing automation and modern accounting tools.
Flex is building the AI-native private bank for business owners.
We’re re-architecting the entire financial system for entrepreneurs—from the first dollar a business earns to how that value compounds, moves, and is ultimately spent in real life. Banking, credit, payments, personal finance, and financial operations—rebuilt from the ground up as a single, intelligent system. Flex is the full financial home for ambitious owners.
Since launching publicly in September 2023, Flex has scaled from zero to nine-figure annualized revenue, with a clear path to profitability by late 2026. We move fast, ship relentlessly, and operate with extreme ownership.
Our customers are affluent business owners ($3–$200M in revenue)—the backbone of the economy and one of the most underserved segments in finance. They’re stuck with outdated banks and fragmented tools. We’re replacing all of it. The opportunity is massive: a ~$1T+ revenue market hiding in plain sight. Our ambition is to build a $100B+ company by delivering a product that is fundamentally better—not incrementally improved.
Flex has raised $100M+ in equity and $300M+ in debt.
- Mission-critical problems: We build software that directly controls how money moves at scale.
- High bar, low ego: Small teams, exceptional people, real ownership.
- Speed over comfort: We prioritize execution, quality, clarity, and results.
- Enduring impact: What we’re building will define how a generation of owners runs their businesses.
Team & Locations
We hire exceptional people who want to build hard things and see their work matter immediately. Roles are available in: San Francisco, Miami, New York, and fully remote.
Flex Fuels Ambition.
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
Build something generational — Capture the full lifecycle of money for ambitious business owners.
Work on real money, real risk — Payments, credit, and banking at serious scale.
Solve hard problems — AI, underwriting, compliance, and global finance from first principles.
True ownership — Small teams, high trust, real accountability.
Founder-level exposure — Direct access to leadership, customers, and investors.
High bar, high taste — Move fast without cutting corners.
Elite peers — People here are builders, not tourists.
Real upside — Meaningful equity if you help build something big.
Top Skills
Modern Accounting Tools
Technology Stack
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