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

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.
Experience designing and maintaining data pipelines and working with big data platforms (bonus: Snowflake).
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.
Proven ability to mentor junior engineers and raise the technical bar through best practices.

Benefits

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

backend developmentJavaSpringGradleJUnitJVM tuningperformance optimizationREST API designdata pipelinesbig data

Soft Skills

mentoringtechnical leadershipcollaborationcommunication