Software Engineer

Flex Software Engineer II

Flex is building the AI-native private bank for business owners. We're re-architecting the entire financial system for entrepreneursfrom 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 operationsrebuilt 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 They're stuck with outdated banks and fragmented tools.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 betternot 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.

About the Role

We're looking for a Software Engineer II to help build product features that power financial services. You'll work on systems that handle payments, credit, and other core products that our customers rely on daily to drive business operations.

What You'll Do

What Makes You a Great Fit

Technical environment : We primarily use Typescript, PostgreSQL, and GCP. We are building in a monorepo with a lean towards rapid value creation through trunk based development. Deploying to production 3-5 times a week is the average velocity of a team member.

What matters to us : We value ownership, product sense, and clear communication. You should be someone who thinks beyond just shipping code to understanding the impact on users and the business. We're a small team, so everyone wears multiple hats and jumps in where needed.

$110,000 - $145,000 a year

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.