Client Success Manager, MGID/FastRiver (AdOps Manager, Greece)

Confidential

Athens, Attikí, Greece permanent

Posted: February 5, 2026

Job Description

MGID is a global native advertising platform that helps brands reach unique local audiences at scale. At MGID, we empower brands and publishers to collaborate transparently through our privacy-first targeting technology. This enables advertisers to drive performance and awareness while allowing publishers to retain and monetize their audiences. Today, we’re creating innovative technologies, and with your help, we aim to reach even greater heights.

Fast River is a dynamic digital marketing and advertising company based in Athens, Greece, dedicated to helping brands and advertisers achieve impactful results through cutting-edge, data-driven digital strategies.
We are seeking a talented Client Success Manager (AdOps Manager) to help us manage the portfolio of assigned supply and demand clients, including onboarding, developing customer relationships, promoting and upselling the company's products, and increasing margin profit through performance optimization.

What You’ll Do:

Supply:

• Onboarding of new publishers

• Introduction to the client at the stage of negotiations

• Creating an account and widgets

• Overseeing integration

• Troubleshooting

• Upselling new formats for publishers

Demand:

• Conducting Dashboard onboarding (platform Q&A)

• Learning details about the client’s product/service, understanding the main KPIs

• Proposing new product formats (features) or budget increases on the next contract

• Analyzing the general client's account to propose changes to current campaigns and strategies for new ones

• Reviewing daily/total budgets

• Promoting extras (AI features and tools) to reach maximum autonomy and performance for the client’s campaigns

• Creating Weekly reports about the pace/performance and suggestions for adjustments (if needed)

• Presenting results of the client's campaign on monthly/ quarterly BR calls

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