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, RevOps, and Partner Success teams to support product launches, co-marketing initiatives, and expansion programs.
• Surface partner feedback and insights to internal stakeholders to help shape roadmap priorities and go-to-market strategy.

Key qualifications

• 8–12+ years of experience in Account Management, Partner Success, Business Development, or related roles, with at least 3+ years in people management.
• Proven track record of driving retention and expansion within existing customer or partner portfolios.
• Experience managing complex, multi-stakeholder relationships in B2B, B2B2C, FinTech, PropTech, or SaaS environments.
• Strong commercial acumen with the ability to identify and close growth opportunities post-sale.
• Demonstrated ability to lead, coach, and develop high-performing teams.
• Strong operational discipline, including experience with CRM tools (e.g., Salesforce), forecasting, and KPI management.
• Excellent communication, presentation, and stakeholder management skills.
• Comfortable operating in a fast-paced, high-growth, and highly cross-functional environment.

Life at Flex

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.

We offer many employee benefits. For full time, U.S. based employees we offer:

• Competitive pay
• 100% company-paid medical, dental, and vision
• 401(k) + company stock options
• Unlimited paid time off with a PTO minimum + 13 company paid holidays
• Parental leave
• Flex Cares Program: Non-profit company match + pet adoption coverage
• Free Flex subscription