The Flex

Staff Software Engineer, Fullstack (Marketing)

New York, NY; San Francisco, CA; USA · Staff+ · Full-time

Sponsorship not specified$200k-$250kDetected 6 days ago

JavaReactReduxReact NativeSpringFull-Stack DevelopmentGitDynamoDBAWSCI/CDGitHub ActionsDatadogRESTData EngineeringAgileJUnitMentoring

About the role

Flex is a growth-stage, NYC headquartered FinTech company that is creating the best rent payment experience.
It's hard to believe that it's 2026 and paying rent on time is expensive, inflexible, and difficult.
Flex enables our users to pay rent throughout the month on a schedule that better fits their finances and budget.

Focus on creating exceptional user and partner experiences that drive engagement and retention.
Partner closely with product managers, designers, and data scientists, data analysts to identify and solve critical user onboarding challenges.
Design, develop, test, and deploy robust APIs, services and data pipelines that enhance user onboarding and overall platform experience.
Implement changes through an agile methodology, prioritizing rapid iteration and continuous improvement.
In this role, you will be instrumental in developing and scaling the platform and app experiences that empower our users and partners, unlocking our next phase of 10x growth.
We are growing quickly, but deliberately, with a focus on building an inclusive culture.

7+ years of professional software development experience.
3+ years of hands-on experience with Java.
3+ years of experience with React or React Native.
3+ years of experience with TypeScript.
Experience with Service-Oriented Architecture, REST APIs, Message Queues, and scalable architectures.
Experience with architectures and tools in React Native and React ecosystems (Hooks, Components, Context, Redux).
Experience with AWS (EKS, Aurora RDS, Elasticache, DynamoDB) and containerization tools.
Minimum Qualifications
Having experience building high-quality mobile and web UIs to specifications is a must to have.
Proficient in Java frameworks and tools used at Flex, including Spring (core/web/boot), Gradle, JUnit, and JVM (memory/performance tuning, GC).

Proficient in CI/CD systems (preferably GitHub Actions), git, and automation.
Skilled in observability and monitoring tools, such as DataDog, to ensure high availability.
Experienced with big data platforms and tooling, including Snowflake.
Proficient in Infrastructure as Code, using tools like CDK and Terraform.
Skilled at elevating team standards through best practices, and mentoring junior engineers.
Excellent written and verbal communicator, with experience in cross-functional collaboration.
The successful candidate's starting pay will be commensurate with their experience, qualifications, and Flex's internal leveling guidelines and benchmarks.
Tier 1 (NYC/Bay Area, Los Angeles, Seattle)

Flex takes a market-based approach to pay, and compensation may vary depending on your primary work location.
The successful candidate's starting pay will be commensurate with their experience, qualifications, and Flex's internal leveling guidelines and benchmarks.
$200,000 - $250,000 USD
$180,000 - $225,000 USD
$170,000 - $212,000 USD

Our mission is to empower as many renters as possible with flexibility over their most significant recurring expense.
After deliberately keeping a stealth profile as we built up unprecedented investor support and an enthusiastic user base, we are looking for motivated individuals to help us keep our mission growing.
Will you be a part of the team?
For full-time U.S. employees we offer:
For full-time non-U.S. employees, we offer:

Our dynamic team has incredible perspectives to share, just as we know you do, and we take great pride in being an equal opportunity workplace.
equal opportunity workplace.

This listing is sourced directly from The Flex's careers page and normalized into a canonical job model.