Lifecycle Marketing Manager , NY; San Francisco, CA

Flex is a growth-stage, NYC headquartered Fin Tech 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?

As a Lifecycle Marketing Manager at Flex, you will play a critical role in driving business growth by overseeing transactional communications with our customers, ensuring a seamless experience using Flex.

You will own and optimize product-led messaging within the customer lifecycle (e.g., payment confirmations, reminders, status updates), and multi-channel campaigns (email, push, SMS) to ensure customers understand and can successfully use Flex. You will oversee a high volume of unique campaigns across segmented user journeys to drive engagement, enhance customer satisfaction, and improve retention. You’ll collaborate closely with Product, Marketing, Strategy, Compliance, and Customer Support to align messaging with product updates and customer needs while ensuring regulatory compliance.

We are looking for a data-driven Lifecycle marketer with experience optimizing transactional communications who thrives in a high-execution, fast-paced environment. You are a strong cross-functional collaborator and are comfortable balancing strategic planning with hands‑on execution. If you are highly organized, action-oriented, and passionate about creating seamless customer experiences, this role is for you.

Transactional Communications Ownership: Maintain and optimize transactional communications (payment confirmations, reminders, status updates, and related product‑led messaging) to ensure a seamless customer experience across product and owned channels (email, SMS, push).

End-to-End Campaign Development: Own the full lifecycle of communications — strategy, messaging, campaign development, and automation — across segmented user journeys, without relying on a dedicated creative team.

Performance Analysis & Optimization: Track and analyze campaign performance to identify opportunities that improve customer engagement, retention, and overall communication strategy. Run a structured A/B testing agenda and translate results into concrete next steps.

Cross-Functional Collaboration: Partner closely with Product, Marketing, and Compliance to support new product launches, regulatory compliance requirements, and customer experience enhancements. Act as the go‑to voice on transactional comms in cross-functional conversations.

Critical Incident Response: Execute real-time communications to support critical incident resolution during the rent cycle, including occasional on‑call support during nights and weekends.

• 5+ years of experience in CRM or lifecycle marketing email and SMS campaign management, preferably in a highly regulated industry (e.g., Fin Tech, Health Tech).
• Proven experience managing campaigns across multiple channels (email, SMS, push) from creative development through execution, with a strong focus on A/B testing and continuous optimization.
• Proficiency with email and SMS marketing platforms (Braze preferred), A/B testing tools, and analytics software. Comfort with segmentation logic and campaign QA
• Strong ability to analyze data and translate insights into actionable…