Staff Software Engineer, Fullstack-MarTech
Flex · New York, NY; San Francisco, CA; USA
About this role
## Flex — Staff Software Engineer (Fullstack-MarTech) Flex is a growth-stage, NYC-headquartered FinTech company building the best rent payment experience. Paying rent on time shouldn’t be expensive, inflexible, or difficult—Flex enables renters to pay throughout the month on a schedule that fits their finances and budget. ### About the role Flex is looking for a **Staff Software Engineer** to join our **MarTech (Marketing Technology)** team. You’ll spearhead the implementation of the platforms, services, and customer-facing web experiences that power how Flex finds, wins, and keeps customers. **MarTech** is the connective layer between our ad platforms, website, messaging systems, analytics, and product data. The team turns marketing spend into a measurable, repeatable growth engine—helping marketing launch, test, and personalize campaigns without hand-built engineering each time. ### Projects & systems you’ll work on - **Incentive platform** — event-driven credit assignment for referrals, affiliates, and campaigns. - **Attribution & measurement** — conversion APIs, identity resolution, and spend/event pipelines behind acquisition cost reporting. - **Customer-facing web** — the full **getflex.com** surface area and paid-acquisition landing pages. - **Lifecycle messaging** — campaign orchestration, audience syncs, and event-driven notifications. ### What you’ll do - Lead and drive implementation across MarTech platforms and services. - Own growth engineering end-to-end across Lifecycle Marketing (email & SMS), Performance Marketing (paid acquisition), Brand (social and every getflex.com property), and Product Marketing. - Build customer-facing experiences and the systems that power measurement, attribution, and messaging.
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