Staff Software Engineer, Finance Engineering

Flex; United States; Remote; USD 90,000 - 150,000; Full time

Job summary

Join a forward-thinking FinTech company on a mission to revolutionize rent payment experiences. As a backend engineer, you will be pivotal in designing and implementing innovative financial services that empower users with flexibility in managing their rent payments. Collaborate with a dynamic team in a remote-first environment, where your ideas will be valued and your technical expertise will drive meaningful change. This role offers an exciting opportunity to work with cutting-edge technologies and contribute to a culture of transparency and growth, making a significant impact in the lives of renters across the globe.

Benefits

100% company-paid medical, dental, and vision

401(k) + company equity

Unlimited paid time off

13 company paid holidays

Parental leave

Flex Cares Program

Free Flex subscription

Qualifications

• 6+ years of software development experience with strong technical leadership.
• Experience in designing fault-tolerant and scalable distributed systems.

Responsibilities

• Design and maintain the Finance service and internal tooling.
• Develop APIs for large money movements across banking partners.

Skills

Java

Python

Golang

TypeScript/Node.js

SQL

NoSQL

AWS Cloud Services

Infrastructure as Code

Communication Skills

Education

Bachelor's Degree in Computer Science or related field

Tools

AWS CLI

Terraform

MySQL

PostgreSQL

DynamoDB

Job description

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?

As we continue to grow our talented team, we remain committed to radical transparency, integrity, and individual growth. We believe that your unique background and experience adds tremendous value to the organization and will empower you to take absolute ownership of business challenges and the execution of solutions.

What we need:

Flex is looking for a backend engineer to join our core platform team. We want engineers with ideas (because they’ll definitely be heard on our small and tight-knit team) and ambition! Successful devs will feel comfortable in a startup environment and will be happy to work in a remote-first team with a lot of independence.

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:

• 6+ years of experience in software development or a related field
• Experience in technical leadership, guiding engineering teams through complex projects
• Experience with Java, Python, Golang, or TypeScript/Node.js.
• Strong experience with relational SQL and NoSQL databases, such as MySQL/PostgreSQL/DynamoDB
• Experience in designing and developing the fault-tolerant and scalable distributed systems
• Experience with AWS cloud services: ESC/EKS, Lambda, API Gateway, VPN, RDS etc
• Infrastructure as code(AWS CLI, AWS CDK/Terraform)
• Strong communication skills with the ability to understand and explain technical issues to a non-technical audience
• Follow engineering best practices as well as propose new ones
• Experience with finance reporting and reconciliation
• Deep experience with writing complex query and data mining

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 with a PTO minimum + 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