Senior Manager, Account Management

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? Senior Manager, Account Management 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 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? About the role As the Senior Manager, Account Management, you will be responsible for leading a team of Account Managers and directly owning a portfolio of Flex’s most strategic partners. This role sits at the intersection of partner success and revenue growth, with a clear mandate to drive retention, expansion, and long-term value across existing accounts. Reporting to the Vice President of Account Management, you will play a critical role in translating account strategy into execution. You will ensure partners are deeply engaged with Flex’s products, expanding their portfolios over time, and realizing increasing business value through adoption, integrations, and new growth initiatives. The ideal candidate is a hands-on leader with strong commercial instincts, operational rigor, and a passion for building durable partner relationships in high-growth B2B or B2B2C environments. What you’ll do Account Ownership Growth Own and grow a portfolio of mid-market and enterprise accounts, with responsibility for renewals, upsells, cross-sells, and expansion revenue. Develop and execute account plans that identify growth opportunities across new products, expanded portfolios, and deeper integrations. Partner closely with Sales to ensure seamless handoffs, aligned account strategies, and consistent partner experiences. Partner Relationship Management Build and maintain strong, senior-level relationships within partner organizations, serving as a trusted advisor and primary point of contact post-sale. Proactively identify partner needs, risks, and opportunities, ensuring timely escalation and resolution when necessary. Drive executive business reviews and strategic planning conversations with key partners. Team Leadership Development Lead, coach, and develop a team of Account Managers, setting clear expectations around performance, accountability, and partner outcomes. Support hiring, onboarding, and ramping of new team members as the Account Management organization scales. Foster a collaborative, high-performance, and inclusive team culture. Operational Excellence Metrics Track and manage key performance indicators related to retention, expansion pipeline, adoption, utilization, and partner health. Maintain accurate forecasting and CRM hygiene to support revenue predictability and leadership reporting. Use data and insights to inform account strategies, prioritize efforts, and continuously improve team performance. Cross-Functional Collaboration Work closely with Product, Growth, Marketing, RevOp ... (truncated, view full listing at source)