San Francisco, United States of America Hybrid Employment $55,000 - $75,000 a year

Flex is hiring a Software Engineer II

About the Role

Build systems that move real money at scale. As a Software Engineer II, you'll play a key role in developing and maintaining the infrastructure behind financial services used by ambitious business owners. You'll take full ownership of medium-sized features—from concept through deployment and beyond—ensuring they are robust, compliant, and aligned with long-term product goals.

What You’ll Do

  • Design, implement, and maintain features across the full stack, including APIs, backend services, and user-facing components
  • Write clean, well-tested code with an eye toward long-term maintainability and system reliability
  • Collaborate closely with product and engineering teams to solve complex problems in a regulated domain
  • Review code thoughtfully and contribute to shared standards across the engineering organization
  • Think beyond implementation—consider how your work supports broader product and business objectives
  • Extend and improve foundational systems that other teams rely on
  • Balance rapid iteration with operational discipline, especially in high-stakes areas like payments and credit

What We’re Looking For

  • Solid grounding in software engineering principles and experience working within complex, evolving codebases
  • Demonstrated ability to own features end-to-end and support them over time
  • Strong product awareness—understanding how technical decisions affect users and business outcomes
  • Proactive problem-solving skills, with a drive to research and propose effective solutions
  • Fluency in English, with clear and concise communication habits
  • Commitment to quality, accountability, and continuous improvement

Nice to Have

  • Prior experience in financial services, regulated environments, or systems handling sensitive data

Technology Environment

Our stack includes TypeScript, PostgreSQL, and Google Cloud Platform. We work in a monorepo with trunk-based development, enabling fast, coordinated releases across services.

Why This Work Matters

You’ll help shape financial infrastructure that supports the full lifecycle of money—from payments to credit and beyond. Working in small, trusted teams, you’ll have direct influence on product direction and technical strategy. This is not just another fintech role: you’ll tackle challenges in underwriting, compliance, and global finance from the ground up, with real accountability and room for meaningful impact.

Work Model

This role is available in San Francisco, Miami, New York, or fully remote. We support a hybrid model, allowing flexibility while maintaining strong team alignment.

Required Skills
TypeScriptPostgreSQLGoogle Cloud PlatformMonorepoTrunk-Based DevelopmentSoftware Development FundamentalsProblem SolvingProduct SenseSystem MaintenanceProactive Research TypeScriptPostgreSQLGoogle Cloud PlatformMonorepoTrunk-Based DevelopmentSoftware Development FundamentalsProblem SolvingProduct SenseSystem MaintenanceProactive Research
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About company
Flex

Flex is a VC-backed company that empowers business owners with a new approach to finance. The company offers an AI-native, all-in-one business and personal finance platform designed for entrepreneurs and business owners.

Flex provides premium business banking, flexible net-60 credit, accounts payable automation, and dynamic capital solutions — all integrated into a seamless platform. The company aims to simplify financial operations so owners can focus on growing their businesses.

Recognized as one of Fast Company’s 2026 Most Innovative Companies, Flex combines institutional-grade financial tools with modern technology to serve the needs of modern businesses globally.

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Job Details
Department Engineering
Category fullstack
Posted 4 hours ago