Senior Customer Success Manager

About Checkmate and Mate. 🛍 📲 Checkmate is a multichannel offers network loved by 100M shoppers and hundreds of leading brands. mate. is your AI growth teammate, the eCommerce data network that agentically turns customer intelligence into revenue. mate finds it, Checkmate goes and gets it. Checkmate is the distribution network, with 100M+ shoppers and 12B+ live intent signals. mate is the AI layer built on top of it: it resolves anonymous visitors, spots the revenue a brand is missing, and builds and executes the campaigns to capture it. mate runs six agents for brands: Mate Intelligence: a customer dashboard and AI chatbot that surfaces the revenue a brand is missing. Enrichment: identity resolution that reveals and resolves anonymous visitors. Growth: AI-built, single-use offers delivered across our network and a brand's own channels, priced on performance, with no retainers and no lock-in. Social Activation: enriches social handles into full shopper profiles. LLM Visibility: tracks and grows how a brand shows up in AI search and assistants. Code Leakage: finds leaked discount codes and replaces them with single-use ones. The combination is rare: a consumer product shoppers love and an AI growth engine brands depend on. We work with leading brands like Everlane, Brooklinen, and Malbon, and we're backed by Google Ventures, Mantis VS, Fuel Capital, and others. The Role 💼 We're hiring a Sr Brand Success Manager to own our brand relationships from the first day of onboarding through renewal and expansion. You'll be the person brands trust to make Mate and Checkmate work for them: live fast, revenue early, and strong first results that turn into long-term partnerships. This is a high-ownership role on a small team. You'll carry your own book of brands, run those relationships end to end, and own the revenue we deliver to brands. If you like owning outcomes, moving fast, and being the reason a brand stays and grows, you'll thrive here. What You’ll Do ⚡ Onboarding & Activation Lead onboarding for new brands, from kickoff through go-live Configure each brand's offers, channels, and audiences for their goals Set success metrics and a clear first-30-days plan with every brand Get brands to first revenue quickly and cleanly Account Management Own a book of brands as their main point of contact Run regular check-ins, business reviews, and performance recaps Track account health, usage, and renewal timelines Get ahead of risk before it reaches a renewal Retention & Growth Own renewals across your book Identify expansion opportunities and build the case with data Turn strong results into case studies and references Cross-Functional Execution Work with Rev Ops to translate performance into account actions Bring brand feedback to Product and Ops, and flag what matters Partner with Sales on clean handoffs and account planning Build for Scale Help standardize onboarding playbooks and account templates Improve CS…