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Senior Software Engineer, Backend New Remote (U.S.)
Flex Group
- United States
- United States
Über
Flex is hiring
Senior Software Engineer, Backend
roles across four engineering teams:
Consumer ,
Partner Integrations ,
Core Platform , and
Risk . When you apply, you will automatically be considered for all open Senior Backend positions, and your placement will be determined based on your experience and expertise assessed during the interview process. As a Senior Backend Engineer at Flex, you will play a key role in designing, building, and scaling backend services and APIs that power our products, partner integrations, and critical risk management platforms. Youll collaborate closely with cross-functional teams to deliver robust, fault?tolerant systems that impact renters and partners at scale. You will own the end?to?end lifecycle of your services from requirements and architecture through implementation, testing, deployment, and monitoringand help elevate the team by driving technical best practices and mentoring junior engineers. Teams: Consumer Engineering:
Builds the APIs and backend systems powering Flexs main consumer?facing products. This team focuses on delivering scalable services for a seamless rent payment experience through our mobile and web apps. Partner Integrations Engineering:
Owns the backend services and integrations that connect Flex to financial partners and payment networks, ensuring reliable, secure payment flows and partner?facing experiences. Core Platform Engineering:
Maintains the backend systems and infrastructure supporting all business features, including Payments, Billing, Identity, and Partner Integrations, ensuring Flexs foundation is robust and scalable. Risk Platform Engineering:
Develops the platforms and APIs that mitigate credit and fraud risk, enhancing customer accessibility while safeguarding against misuse through advanced rules engines, machine learning, and event data systems.
A minimum of 4 years of experience with Java is required for this position. What Youll Do Design, develop, test, and scale backend services and APIs that power Flexs 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 Flexs 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 teams 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.
Key Qualifications
Strong computer science fundamentals with a proven track record of building scalable backend systems. 56+ 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. 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. Risk Platform candidates only:
experience in risk engineering, rules engine architecture, and implementing risk/fraud/credit policies in production systems is highly valued.
Salary and Benefits
Salary compensation will be commensurate with the candidate's experience and Flexs internal leveling guidelines and benchmarks. For working locations in NY/NJ/CA, the base salary range will be $197,000$213,000. For all other states, the base salary range will be $177,000$192,000.
We offer many employee benefits & perks. For full?time US?based positions we offer: Competitive medical, dental, and vision available from Day 1. Company equity. 401(k) plan with company match (our match kicks off at the beginning of 2026). Unlimited paid time off + 13 company paid holidays. Parental leave. Flex Cares Program. Free Flex subscription.
For full?time non?US employees, we offer: Competitive compensation + company equity. Unlimited PTO.
Equal Opportunity Employer
We are an equal opportunity workplace. We do not discriminate on the basis of any protected group status under any applicable law. As set forth in Flexs Equal Employment Opportunity policy, we do not discriminate on the basis of any protected group status under any applicable law. #J-18808-Ljbffr
Sprachkenntnisse
- English
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