Staff Software Engineer, Fullstack

Flex is a growth-stage, NYC headquartered FinTech company that is creating the best rent payment experience. It’s 2025, and Flex is changing how renters pay by enabling payments throughout the month on a schedule that fits their finances. Our mission is to empower renters with flexibility over their recurring expense. We are looking for motivated individuals to help us keep our mission growing.

About The Job

Flex is looking for a Fullstack Software Engineer who will be responsible for implementing the various backend systems that support all business features. You’ll be part of the backend engineer team, responsible for the services and integrations that power our products, such as Payment, Billing, Identity, partner integration, etc. You’ll be designing, developing, testing, and scaling systems needed to deliver great user and partner experiences. You’ll work closely with product, design and engineering peers to solve our users\' most pressing problems around rent payment. You’ll roll out changes to our customers in an agile manner with a delivery cadence that favors small, frequent iterations. The ideal candidate will be comfortable leading scoping, design and implementation for APIs they build and can drive their production rollouts to completion with minimum oversight.

A minimum of 4+ years of experience with Java and 3+ years with React / Typescript is required for this position.

What you\'ll do

• Design, implement and maintain our Finance service and internal tooling, including financial reporting, reconciliation / audit process.
• Design and develop new APIs and functionalities to support large money movements across our banking partners via different payment rails, such ACH.
• Scale out core platform to support business growth while maintaining performance and reliability.
• Continuously improving our daily operations with automation, tooling, design evolution, observability etc.
• Work closely with product, analytics, finance and engineering peers to launch new financial features into our platform.

What We’re Looking For :

Minimum Qualifications

Preferred Qualifications

Salary

The salary compensation range for this role will be commensurate with the candidate\\'s experience and Flex\\'s internal leveling guidelines and benchmarks.

Life at Flex :

We are an equal opportunity workplace with a diverse team. Our HQ is in New York City, with employees across the US, Australia, Canada and South America. We offer competitive pay and a comprehensive benefits package for full-time employees.

EEO Statement

Flex is an equal employment opportunity employer. We do not discriminate on the basis of protected status under applicable law.

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