Experienced Customer Success Lead – Behavioral Modeling and Personalization

At arenaflex, we're revolutionizing the AI revolution by democratizing access to cutting-edge technology. Our mission is to empower businesses to harness the power of AI, driving growth and innovation in the process. As a rapidly growing tech company, we're assembling one of the largest consented behavioral datasets in the US, beyond the walled gardens of BigTech. This diverse understanding of consumer intent underpins a proprietary, private-by-design AI model that supercharges machine learning and marketing performance for leading brands, agencies, and Martech / AdTech platforms. We believe that every employee should be empowered to own 0-1 contributions and have the opportunity to achieve real impact – and scale that impact – on the business. If that sounds like an exciting opportunity to you, we want to hear from you.

arenaflex Highlights:

• Partnerships with industry leaders in the tech space

• Fully remote or hybrid work options from several hubs (Boston, SF Bay Area, Seattle, NYC)
• World-class team of Machine Learning experts who have worked on cutting-edge recommender systems and internal tools at top tech companies
• Product and Go-To-Market teams who have taken ideas from concept to 9-figure revenue streams

Benefits:

• Competitive Base Salary

• Bonus structure for qualifying employees
• Meaningful equity & financial upside – a real % of the company
• Health, Dental, Vision
• Flexible PTO
• 401k

As arenaflex's first Customer Success Lead, you'll be responsible for ensuring campaign excellence across live programs, from onboarding, performance monitoring, and growth of client campaigns. You'll be the connective tissue between brands, partners, and internal teams, proactively driving results and providing white-glove support.

Your Goal: Make Every arenaflex Campaign a Success Story

You'll need a strong background in programmatic advertising (5–7 years), a strategic mind, and hands-on platform experience (e.g., Nexxen, The Trade Desk, Viant). You should love to make an impact, enjoy solving complex delivery problems, and be energized by client-facing impact.

What You'll Do:

• Ensure campaigns run smoothly and hit performance goals

• Translate client objectives into clear media plans, creative needs, and setup requirements
• Coordinate campaign launches and work closely with internal teams to keep everything on track
• Monitor pacing and performance, and step in with optimizations or troubleshooting when needed
• Coordinate with platforms like Nexxen, The Trade Desk, or Viant to support execution
• Keep clients informed with regular updates, performance insights, and clear next steps
• Collaborate with Sales, Product, and Engineering to resolve issues and share feedback from the field

What You Bring:

• 5 to 7 years of experience in programmatic advertising, with a strong track record of campaign delivery

• Hands-on knowledge of major DSPs, especially Nexxen, The Trade Desk, or Viant
• Experience working directly with clients and solving problems across both technical and strategic layers
• A strong understanding of how campaigns are paced, optimized, and measured
• The ability to jump into the platforms and figure things out when something's not working
• Clear communication skills and a calm, professional approach under pressure
• A bias toward action, with a knack for bringing order to fast-moving environments

We Prioritize Attitude, Culture, and General (Technical) Fit

We're not looking for someone who checks every box on our job description. If our mission and work resonates with you, we encourage you to apply. Tell us how you can help drive our products forward, even if you don't feel like you are a perfect fit for some of the listings. At arenaflex, we're committed to creating a workplace that's inclusive, diverse, and empowering. We believe that every employee should have the opportunity to grow and develop their skills, and we're dedicated to providing the resources and support needed to succeed. If you're passionate about AI, machine learning, and customer success, we want to hear from you. Apply now to join our team and be a part of something revolutionary.

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