Enterprise Customer Success Manager — Adoption & Renewals

AtomMatrix; Phoenix (AZ); On-site; USD 90,000 - 130,000; Full time

Job summary

Atom Matrix Innovation LLC in Phoenix leads a customer-success oriented role focused on post-go-live outcomes. You will own a portfolio of enterprise accounts, driving adoption, protecting and growing relationships, and steering renewals.

This hands-on position requires translating customer goals into platform usage with APIs, integrations, and deliverability in collaboration with engineering. Based in North America, you will spot expansion opportunities, coordinate cross-functional teams, and

Qualifications

• 4+ years in customer success or account management, ideally at a CPaaS, SaaS, or developer platform.
• Technically fluent — comfortable talking APIs, integrations, and deliverability with a customer's engineers.
• A track record of retaining and growing enterprise accounts.
• Calm, organized, and genuinely responsive; customers trust you because you follow through.
• Strong written and verbal communication.

Responsibilities

• Own a book of enterprise accounts: adoption, health, retention, and renewals.
• Run onboarding-to-value handoffs and regular reviews that tie platform usage to the customer's goals.
• Be the escalation point — coordinate support, solutions, and engineering to resolve issues and close the loop.
• Spot risk early from usage and sentiment signals, and act before it becomes churn.
• Identify genuine expansion opportunities and partner with sales to pursue them.
• Feed patterns from your accounts back into product priorities.

Skills

Customer success

Account management

APIs

Communication

Job description

Atom Matrix Innovation LLC in Phoenix leads a customer-success oriented role focused on post-go-live outcomes. You will own a portfolio of enterprise accounts, driving adoption, protecting and growing relationships, and steering renewals.

This hands-on position requires translating customer goals into platform usage with APIs, integrations, and deliverability in collaboration with engineering. Based in North America, you will spot expansion opportunities, coordinate cross-functional teams, and