Senior Software Engineer, Backend

Flex

Remote regions

Global

Salary range

$55,000–$100,000/yr

Benefits

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What You'll Do:

  • Own large domains and features for card processing and financial ledgering, playing a critical role in developing and maintaining the platform.
  • Architect scalable, low-latency systems, ensuring growth through well-designed services and data models.
  • Lead by mentoring engineers and driving technology frameworks, staying engaged with industry trends.

What You Need:

  • Proficiency in NodeJS+Typescript and server design principles, with experience in architectural patterns for high availability.
  • Strong communication skills and ability to evaluate technical directions and make data-driven decisions.
  • Four or more years of industry experience shipping high-quality products at scale, with exposure to cloud providers and micro-services.

Why Join Us:

  • Build something generational by capturing the full lifecycle of money for business owners and working on real financial products at scale.
  • Solve hard problems in AI, underwriting, and compliance with true ownership in small, high-trust teams.
  • Enjoy founder-level exposure and work with elite peers in a high-bar environment, with meaningful equity for significant impact.

Flex

Flex is building the AI-native private bank for business owners, re-architecting the entire financial system from banking and credit to payments and financial operations into a single intelligent system. The company has scaled from zero to nine-figure revenue since its 2023 launch, operates with extreme ownership, and is funded by over $100 million in equity, targeting a massive underserved market.

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