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Software Engineer II, Frontend, Mobile and Web

Flex is a growth-stage NYC-headquartered fintech on a mission to improve the rent payment experience by enabling flexible payment schedules. We're hiring a Software Engineer II to build and scale core user experiences across mobile and web, working closely with product, design, and QA to deliver high-quality, performant features used by hundreds of thousands to millions of users.

Skills

  • Proficient with React.js and/or React Native (hooks, components, context, Redux).
  • Strong TypeScript skills and ability to write testable code.
  • Solid computer science fundamentals and software engineering best practices.
  • Experience with REST APIs and integrating backend services into web and mobile apps.
  • Familiarity with performance optimization for high-traffic applications.
  • Comfort working in an agile, cross-functional environment.

Responsibilities

  • Design, implement, test, and ship new features for web and mobile platforms.
  • Collaborate with product, design, and QA throughout scoping, design, and delivery cycles.
  • Write maintainable, well-documented TypeScript code and unit tests.
  • Optimize UI performance and address scaling concerns for large user bases.
  • Participate in architecture and implementation decisions across frontend and mobile stacks.
  • Review code and collaborate with engineers across teams to improve code quality and best practices.

Education

  • Bachelor's degree in Computer Science, Engineering, or equivalent experience.
  • Graduate degree preferred but not required; equivalent professional experience accepted.

Benefits

  • Competitive medical, dental, and vision starting Day 1 (U.S. full-time).
  • Company equity for full-time employees.
  • 401(k) plan with company match beginning in 2026 (U.S.).
  • Unlimited paid time off plus 13 company-paid holidays (U.S.).
  • Parental leave and Flex Cares Program.
  • Free Flex subscription.
  • Competitive compensation and equity for non-U.S. full-time employees; unlimited PTO.
To read the complete job description, please click on the ‘Apply’ button
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CEO of Flex
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Revathi Advaithi
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Average salary estimate

$168000 / YEARLY (est.)
min
max
$161000K
$175000K

If an employer mentions a salary or salary range on their job, we display it as an "Employer Estimate". If a job has no salary data, Rise displays an estimate if available.

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Make great products for our customers that create value and improve people's lives.

3 jobs
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SENIORITY LEVEL REQUIREMENT
TEAM SIZE
SALARY RANGE
$161,000/yr - $175,000/yr
EMPLOYMENT TYPE
Full-time, remote
DATE POSTED
December 20, 2025
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