
Fintech • Real Estate • B2C
Flex is a financial technology company that enables renters to split and schedule rent payments, pay move-in costs over time, and build credit through on-time rent reporting. It offers consumer-facing payment products (rent split, pay-over-time, and move-in loans) and partners with property owners and property-management systems to help properties collect on-time rent and retain residents. Flex operates via bank partnerships and regulated lending/servicing subsidiaries to provide loans and payment processing while emphasizing security and regulatory compliance.
September 27
🏄 California – Remote
🏖️ New Jersey – Remote
+1 more states
💵 $177k - $213k / year
⏰ Full Time
🟠 Senior
🧑💻 Full-stack Engineer
🦅 H1B Visa Sponsor
AWS
Distributed Systems
DynamoDB
Gradle
Java
JUnit
React
React Native
Redux
Spring
Spring Boot
SpringBoot
Terraform
TypeScript

Fintech • Real Estate • B2C
Flex is a financial technology company that enables renters to split and schedule rent payments, pay move-in costs over time, and build credit through on-time rent reporting. It offers consumer-facing payment products (rent split, pay-over-time, and move-in loans) and partners with property owners and property-management systems to help properties collect on-time rent and retain residents. Flex operates via bank partnerships and regulated lending/servicing subsidiaries to provide loans and payment processing while emphasizing security and regulatory compliance.
• Build decision platform and machine learning solutions to respond to and mitigate business risks in Flex • Design and develop 24/7 high-scale APIs and distributed systems (Java/Spring Boot) on AWS • Implement event data stream ingestion supporting near real-time fraud rules • Develop advanced A/B testing and experimentation capabilities to fight fraud • Work closely with product, design, and engineering peers to launch new features across web and mobile • Maintain and tune JVM performance, CI/CD, observability, and scalable microservice architectures
• 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: Spring (core/web/boot), Gradle, JUnit, JVM (memory/performance tuning, GC) • Experience with microservice architecture, RESTful APIs, Message Queues, and scalable architectures • Experience with React Native and React ecosystems (Hooks, Components, Context, Redux) • Experience with AWS (EKS, Aurora RDS, ElastiCache, DynamoDB) and containerization tools • Preferred: experience in risk engineering, decision/rule engines, or fraud/transaction risk systems • Preferred: proficient in CI/CD (preferably GitHub Actions), git, and automation • Preferred: skilled in observability/monitoring tools (e.g., DataDog) • Preferred: experience with big data platforms and tooling (e.g., Snowflake) • Preferred: proficient in Infrastructure as Code (CDK, Terraform) • Preferred: experience mentoring junior engineers and elevating team standards • Excellent written and verbal communication; experience in cross-functional collaboration
• Competitive pay • 100% company-paid medical, dental, and vision • 401(k) + company equity • Unlimited paid time off + 13 company paid holidays • Parental leave • Flex Cares Program • Free Flex subscription
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