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Senior Software Engineer - Risk Engineering

Flex

$177,000 - $213,000
Sep 26, 2025
New York, NY, US • San Francisco, CA, US
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Flex, a FinTech company, is looking to solve the problem of inflexible and expensive rent payment experiences by creating a platform that enables users to pay rent throughout the month on a schedule that better fits their finances and budget, while mitigating credit risk and fraud risk.

Requirements

  • 6+ years of professional software development experience
  • 5+ years of hands-on experience with Java
  • 2+ years of experience with React or React Native
  • 2+ years of experience with TypeScript
  • Experience building high-quality mobile and web UIs to specifications
  • Proficient in Java frameworks and tools used at Flex, including Spring (core/web/boot), Gradle, JUnit, and JVM (memory/performance tuning, GC)
  • Experience with microservice Architecture, Restful APIs, Message Queues, and scalable architectures

Responsibilities

  • Build decision platform / machine learning solutions to respond to/mitigate business risks in Flex.
  • Design and develop 24/7 high-scale APIs and distributed systems. The tech stack will be on AWS. Java would be the language for the existing code base. Java Spring Boot will be the framework.
  • Work closely with product, design, and engineering peers to launch new features across our web and mobile platforms
  • Implement platforms and APIs crucial for supporting business features within the risk management domain
  • Spearhead the implementation of core decision platform which is an end-to-end solution for the enterprise decision management lifecycle, including business rule management, analytics, process management, and ML/AI
  • Work on event data stream ingestion which supports near real-time fraud rules setup
  • Develop advanced a/b testing and experimentation capabilities for our customers so they can leverage greedy algorithms and fight fraud

Other

  • 6+ years of professional software development experience
  • 100% company-paid medical, dental, and vision
  • 401(k) + company equity
  • Unlimited paid time off + 13 company paid holidays
  • Parental leave
  • Competitive pay