Senior Staff Decision Scientist, Flex
Risk
$160-240k
+ Company stock options. Salary dependent on location
More information about location
2-3 days a week in office
Flexible rent payment application
Be an early applicant
Flexible rent payment application
501-1000 employees
Be an early applicant
$160-240k
+ Company stock options. Salary dependent on location
More information about location
2-3 days a week in office
501-1000 employees
Company mission
To help people pay for the things that matter most.
Role
Who you are
- 10+ years of experience in payments, risk, credit, decision science, or platform analytics
- Strong hands-on skills in Python and SQL and working with large, messy datasets
- Experience working on high-scale transactional systems (payments, lending, marketplaces, fintech, or similar)
- Familiarity with concepts like authorization optimization, loss modeling, cohort/vintage analysis, or unit economics
- Strong product and business intuition—you care about shipping impact, not just analysis
- Comfortable operating cross-functionally and owning ambiguous, high-leverage problem spaces
- Background in fintech, payments, or large tech platforms is a strong plus
What the job involves
- As a Senior Staff Decision Scientist on the Risk & Decision Science team, you’ll own the strategy and optimization of Flex’s payment decisioning stack
- This includes authorization optimization, PSP routing, retries/failover logic, and cost vs. risk tradeoffs across millions of dollars of payment volume
- This is a high-impact, senior individual contributor role where you’ll work at the intersection of payments, product, engineering, finance, and data to improve core platform economics and customer experience
- If you’ve worked on payments platforms, risk systems, credit, or large-scale decisioning at companies like Stripe, PayPal, Square, Adyen, Affirm, or big tech, this role is very much in that vein
- Own and evolve Flex’s payment decisioning and routing strategy across multiple PSPs
- Use data to increase authorization rates while reducing processing costs and losses
- Design and evaluate retry, failover, and fallback strategies to improve reliability and performance
- Analyze large-scale payment and risk data to identify product and platform improvements
- Build models and forecasts to understand the impact of policy and product changes
- Run experiments and measure tradeoffs between growth, risk, cost, and user experience
- Partner closely with Product, Engineering, Finance, and Operations to ship improvements to the payments platform
- Define metrics and dashboards to monitor performance and guide strategy
- Communicate clear, actionable recommendations to leadership and stakeholders
Our take
Many people struggle to pay their rent every month, with a variety of bills hitting their bank accounts simultaneously. Whilst many of these people earn enough money to cover their bills, the inflexible nature of monthly bills can make the all-in-one payment a harder obstacle.
Flex provides a mobile application for the flexible payment of rent, allowing users to pay their landlords through flexible payment plans, reschedule payments when necessary, and protect their funds through Overdraft Protection. The company achieves this by partnering with estate agents and paying their resident's bills upfront, taking on the challenges that landlords would normally have due to late payments.
Flex has experienced extremely rapid growth since its founding which has caused some issues, as it struggled to keep up with the surge in new customers. Having made improvements to its product and scaled its customer service team, it is set to continue providing a service that has come to be highly valued by both tenants and landlords.
Freddie
Company Specialist at Welcome to the Jungle
Insights
10% employee growth in 12 months
Company
Funding (last 2 of 5 rounds)
Feb 2022
$160m
SERIES C
Apr 2021
$46.6m
SERIES B
Total funding: $225.1m
Company benefits
- Medical, Dental & Vision: Your healthcare will be available from Day 1— giving you immediate peace of mind — with best in class coverage and options.
- Parental Leave: Step away with paid time off to focus on family and life’s newest chapter.
- NYC HQ: Collaborate in our lively New York headquarters, with new office space on the way!
- 401(k) Retirement Savings: Plan ahead with our 401(k) program to grow your future. And starting early 2026, employees will be eligible for a company match!
- Flex Giving: Flex Giving empowers employees to support local nonprofits advancing housing stability in the communities we call home.
- Employee Assistance Fund: Confidential financial support to teammates facing unexpected hardships or emergencies.
- Hybrid Work Policy: Work flexibly from home, with in-person collaboration and events that matter.
- Unlimited PTO + Holidays: Take the time you need— whether that’s a vacation, recharge, or simply a long weekend
- Free Flex Subscription: As a Flex employee, you'll have full access to our services without charge.
- GrubHub Credit: Enjoy meal credits while in the office, so you’re fueled for the workday ahead.
Company HQ
Midtown Manhattan, New York, NY
Leadership
Shragie Lichtenstein
(Co-Founder & CEO)Prior to co-founding Flex in 2019, Shragie co-founded Boundless Reality. They graduated from Yeshiva University in 2015 with a Bachelor's Degree in Finance.
YeTong Shao
(Co-Founder)Prior to co-founding Flex in 2019, YeTong co-founded Boundless Reality alongside Shragie. They graduated from the University of Chicago with a Bachelor's Degree in Mathematic & Economics.
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