Senior Software Engineer, Backend - Core Platform

Sorry, this job was removed at 06:09 p.m. (CST) on Monday, Aug 04, 2025
Easy Apply
Hiring Remotely in USA
Remote
Fintech • Payments • Real Estate • Software • Financial Services
Flex splits your rent, and rent-associated costs, into smaller, stress-free payments throughout the month.
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 2025 and paying rent on time is expensive, inflexible, and difficult. We’re here to change that! Flex enables our users to pay rent throughout the month on a schedule that better fits their finances and budget. 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?

About the job

Flex is looking for a Senior Software Engineer who will be responsible for implementing the various backend systems that support all business features.

In this role, you will 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 your 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 is required for this position.

Minimum Qualifications:
  • You have strong computer science fundamentals
  • You have experience to translate the feature requirements into technical specifications.
  • You have experience leveling up the entire team’s bar by introducing best practices, mentoring junior people, etc.
  • You have experience with the Java frameworks and tools we use at Flex such as Spring (core/web/boot), Gradle and JUnit
  • You have experience implementing and operating services in distributed services environments at scale
  • You have experience with observability and monitoring tools such as DataDog for maintaining high availability
  • You write high quality code that is testable, maintainable, scalable and secure
  • You have a good understanding of REST and mobile API best practices
  • You have great communication skills and are comfortable working with a distributed team
Core Competencies:
  • Prior experience working on cross-functional teams
  • Experience with leading the project in its entire lifecycle, from requirements gathering to delivery.
  • Proficient with Java and Spring (Bonus: AWS, Containers, Kubernetes, MySql)
  • Experience with CI/CD to improve code stability and code quality
The salary compensation range for this role will be commensurate with the candidate's experience and Flex's internal leveling guidelines and benchmarks.
  • For working locations in NY/NJ/CA, the base salary pay range will be $197,000-$213,000
  • For all other states, the base salary pay range will be $177,000-$192,000

#LI-Remote

Life at Flex:

We understand that it takes a diverse team of highly intelligent, curious, determined, empathetic, and self aware people to grow a successful company. Our HQ is located in New York City, but we have employees located throughout the US, Australia, Canada and South America. We are growing quickly, but deliberately, with a focus on building an inclusive culture. 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.

We offer many employee benefits. For full time, U.S. based employees we offer:

  • Competitive pay
  • 100% company-paid medical, dental, and vision
  • 401(k) + company equity
  • Unlimited paid time off + 13 company paid holidays
  • Parental leave 
  • Flex Cares Program: Non-profit company match + pet adoption coverage
  • Free Flex subscription

 For full time non-US employees, we offer

  • Competitive Pay
  • Company Equity
  • Unlimited PTO

Similar Jobs

Coinbase Logo Coinbase

Staff Software Engineer

Artificial Intelligence • Blockchain • Fintech • Financial Services • Cryptocurrency • NFT • Web3
Easy Apply
Remote
USA
4000 Employees
247K-290K Annually

Coinbase Logo Coinbase

Software Engineer

Artificial Intelligence • Blockchain • Fintech • Financial Services • Cryptocurrency • NFT • Web3
Easy Apply
Remote
USA
4000 Employees
152K-179K Annually

Tenna Logo Tenna

Software Engineer

Information Technology • Internet of Things
Remote
United States
110 Employees

Battle Creek Games Logo Battle Creek Games

Senior Back-end Engineer

Gaming • Information Technology • Software
Remote
United States
7 Employees
165K-200K Annually
Get Personalized Job Insights.
Our AI-powered fit analysis compares your resume with a job listing so you know if your skills & experience align.

The Company
HQ: New York, NY
419 Employees
Year Founded: 2019

What We Do

Flex, an NYC-headquartered FinTech company, has created a trusted rent payment experience. It’s hard to believe that it’s 2024 and paying rent on time is expensive, inflexible, and difficult; we’re here to change that! We enable our users to pay rent throughout the month on a schedule that better fits their finances and budget, while also helping them build credit.

Our mission is to empower as many renters as possible with flexibility over their most significant recurring expense.

Why Work With Us

We believe it takes a diverse team of curious, determined, empathetic, and self aware people to grow a successful company. We value the unique and dynamic perspectives our team brings to solve critical problems that impact the lives of our users and the financial decisions they make.

Gallery

Gallery

Similar Companies Hiring

Rain Thumbnail
Web3 • Payments • Infrastructure as a Service (IaaS) • Fintech • Financial Services • Cryptocurrency • Blockchain
New York, NY
70 Employees
Scotch Thumbnail
Software • Retail • Payments • Fintech • eCommerce • Artificial Intelligence • Analytics
US
25 Employees
Milestone Systems Thumbnail
Software • Security • Other • Big Data Analytics • Artificial Intelligence • Analytics
Lake Oswego, OR
1500 Employees

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account