Posted:
6/3/2026, 4:22:15 AM
Experience Level(s):
Senior
Field(s):
Software Engineering
Workplace Type:
Hybrid
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 Role
Flex is hiring a Senior Engineer to join our backend engineering team, where you'll be responsible for designing, building, and scaling the systems that power our core products — including Payments, Billing, Identity, and partner integrations. You'll work on services that directly shape how hundreds of thousands of renters experience financial flexibility, and your work will have a measurable impact on the reliability and performance of everything we ship.
In this role, you'll own meaningful portions of our backend infrastructure end-to-end — from scoping and API design through production rollout — with the autonomy to make independent technical decisions that drive real customer and business impact. You'll collaborate closely with product, design, and engineering peers in an agile environment that favors small, frequent iterations over big-bang releases. The ideal candidate is comfortable leading without being asked and takes pride in shipping high-quality, fault-tolerant systems.
At Flex, engineers are expected to bring both technical depth and a builder's mindset. You'll be working within a globally distributed team, partnering with technical and non-technical stakeholders alike, and contributing to a codebase that scales with an ambitious product roadmap. If you thrive in fast-moving environments and want your engineering work to directly improve how people pay rent, this role is for you.
What You'll Do
What You'll Bring
#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:
For full-time non-U.S. employees, we offer:
Website: https://getflex.com/
Headquarter Location: New York, New York, United States
Employee Count: 51-100
Year Founded: 2019
IPO Status: Private
Last Funding Type: Seed
Industries: Apps ⋅ Billing ⋅ Financial Services ⋅ FinTech ⋅ Software