Flex
FinTech
SeniorStaff,DecisionScientist,Risk
Neural analysis suggests this role is
optimal for Senior candidates.
“Senior Staff, Decision Scientist, Risk at Flex. Skills: payment decisioning, authorization optimization, PSP routing, cost vs. risk tradeoffs, risk modeling, forecasting, experimentation. 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”
What You'll Achieve.
increase authorization rates; reducing processing costs and losses; improve reliability and performance; identify product and platform improvements; understand the impact of policy and product changes; measure tradeoffs between growth, risk, cost, and user experience; Define metrics and dashboards to monitor performance and guide strategy
Industry & Context.
Analyze large-scale payment and risk data to identify product and platform improvements; Run experiments and measure tradeoffs between growth, risk, cost, and user experience
What They're Looking For.
Must Have
10+ years of experience in payments, risk, credit, decision science, or platform analytics, hands-on skills in Python and SQL, working with large, messy datasets, Experience working on high-scale transactional systems (payments, lending, marketplaces, fintech, or similar), product and business intuition
Nice to Have
Background in fintech, payments, or large tech platforms is a plus
What You'll Do.
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
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
How You'll Work.
Team & Collaboration
Partner closely with Product, Engineering, Finance, and Operations to ship improvements to the payments platform
Communication Scope
Communicate clear, actionable recommendations to leadership and stakeholders
Full 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 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? Job Description -Senior Staff Decision Scientist Overview 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 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 w
Applying for this Senior Staff, Decision Scientist, Risk role?
Most applicants get filtered before a human reads their resume. See if yours makes the cut.
How to Apply on Greenhouse
- Create a Greenhouse profile before applying — it saves time across multiple applications.
- Upload your resume as a PDF; the parser handles it better than Word.
- Answer all knockout questions carefully — wrong answers auto-reject before a human sees you.
- Enable email notifications to track application status in real time.
ANONYMOUS · UNFILTERED
What do employees actually say about Flex?
Real rants from real employees. Read before you apply.