Responsibilities
- Design, develop, test, and scale backend services and APIs that power Flex’s consumer products, partner integrations, risk management systems, and core platform services.
- Build and operate robust, fault-tolerant distributed systems with multiple external dependencies.
- Implement service APIs for web and mobile apps, simplifying complex rent payment processing.
- Work closely with Product, Design, Infrastructure, Sales, Partner, and Customer Success to deliver features and integrations that delight customers and partners.
- Translate feature requirements into technical specifications and lead the architecture and implementation of scalable solutions.
- Drive the full lifecycle of services and APIs you build, including deployment, monitoring, and optimization for high availability and performance.
- Contribute to evolving Flex’s service-oriented architecture, REST APIs, message queues, and scalable systems design.
- Develop risk management systems such as rules engines, ML-powered fraud detection, and high-scale event ingestion pipelines.
- Mentor junior engineers and help elevate the team’s engineering practices through code reviews, architecture discussions, and technical leadership.
- Ensure services are observable and reliable using monitoring tools and industry best practices.
- Collaborate on CI/CD improvements and automation to increase code quality and delivery velocity.
Requirements
- Strong computer science fundamentals with a proven track record of building scalable backend systems.
- 5–6+ years of professional software engineering experience with a focus on backend development.
- 4+ years of hands-on Java experience, with deep knowledge of the Java ecosystem.
- Proficient in Java frameworks and tools used at Flex: Spring (core/web/boot), Gradle, JUnit, JVM tuning and performance optimization.
- Experience operating services in distributed, service-oriented architectures at scale.
- Familiarity with REST API design, mobile API best practices, and message-driven architectures.
- Skilled at building robust, fault-tolerant systems and integrating with multiple external dependencies.
- Hands-on experience with AWS (EKS, Aurora RDS, Elasticache, DynamoDB), containerization (Docker/Kubernetes), and Infrastructure as Code (CDK/Terraform).
- Skilled in observability and monitoring tools (e.g., DataDog) to ensure high availability.
- Ability to write high-quality code that is testable, maintainable, scalable, and secure, using industry best practices throughout the SDLC (unit testing, build automation, CI/CD).
- Excellent communicator, comfortable working with distributed teams and cross-functional stakeholders.
- Proven ability to mentor junior engineers and raise the technical bar through best practices.
Nice to Have
- Experience designing and maintaining data pipelines and working with big data platforms (bonus: Snowflake).
- Experience in risk engineering, rules engine architecture, and implementing risk/fraud/credit policies in production systems is highly valued.
Benefits
- Competitive medical, dental, and vision
- Company equity
- 401(k) plan with company match
- Unlimited paid time off + 13 company paid holidays
- Parental leave
- Flex Cares Program: Non-profit company match + pet adoption coverage
- Free Flex subscription
Work Arrangement
Hybrid
Team
Structure: four engineering teams: Consumer, Partner Integrations, Core Platform, and Risk
Additional Information
- Relocation assistance program for candidates outside of New York, San Francisco, and Salt Lake City areas.
