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. 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?
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. 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 RoleFlex is looking for a Staff Software 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. As a Staff Engineer at Flex, you’ll help set technical direction and shape the long-term architecture of our backend services while still being hands-on with coding and delivery. You will collaborate across engineering, product, design, and other stakeholders to ensure scalable, reliable, and impactful systems that power consumer experiences, partner integrations, and our core business platforms. You’ll also play a critical role in mentoring engineers, elevating technical standards, and ensuring the success of projects end-to-end.
Our Engineering Teams
- Consumer Engineering: Builds the APIs and backend systems powering Flex’s 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 Flex’s 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.
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
#LI-Remote
Flex takes a market-based approach to pay, and compensation may vary depending on your primary work location. Work locations are categorized into one of three tiers based on a cost of labor index for that geographic area. The successful candidate’s starting pay will be commensurate with their experience, qualifications, and Flex’s internal leveling guidelines and benchmarks.
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.
Offices
Roles posted in New York, San Francisco, and Salt Lake City are hybrid positions with on-site expectations of 2-3 days per week in our local offices. For candidates outside of these areas, you may be eligible for our relocation assistance program.
Benefits
For full-time U.S. employees we offer:
- Competitive medical, dental, and vision
- Company equity
- 401(k) plan with company match
- Unlimited paid time off + 13 company paid holidays
- Parental leave
- Free Flex subscription
For full-time non-U.S. employees, we offer:
- Competitive compensation + company equity
- Unlimited PTO
Skills Required
- 6+ years of experience in software development
- Experience in technical leadership
- Experience with Java, Python, Golang, or TypeScript/Node.js
- Strong experience with SQL and NoSQL databases
- Experience in designing scalable distributed systems
- Experience with AWS cloud services
- Infrastructure as code (AWS CLI, AWS CDK/Terraform)
- Strong communication skills
- Experience with finance reporting and reconciliation
- Deep experience with writing complex queries
Flex Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Flex and has not been reviewed or approved by Flex.
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Healthcare Strength — Day-1 medical, dental, and vision coverage is explicitly offered and framed as “best-in-class coverage and options,” suggesting strong baseline health benefits. Additional listings also describe broad health-support elements such as IVF/adoption and gender transition benefits, reinforcing depth in healthcare-related coverage.
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Retirement Support — A 401(k) is available, with a stated company match starting in early 2026, indicating improving retirement support. This rollout appears to address earlier gaps where matching was not consistently present.
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Leave & Time Off Breadth — Unlimited PTO plus company holidays (and, in some descriptions, shutdown days) indicates a wide time-off policy on paper. Hybrid work flexibility and office-day meal credits can add to the overall rewards value for NYC-based employees.
Flex Insights
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.
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