Account Manager, Japan

StackAdapt is the leading technology company that empowers marketers to reach, engage, and convert audiences with precision. With 465 billion automated optimizations per second, the AI-powered StackAdapt Marketing Platform seamlessly connects brand and performance marketing to drive measurable results across the entire customer journey. The most forward-thinking marketers choose StackAdapt to orchestrate high-impact campaigns across programmatic advertising and marketing channels.

The Senior Account Manager (SR AM) plays a pivotal role in post-sales client relationships-driving platform adoption, campaign performance, and account growth. You'll oversee a portfolio of strategic clients, primarily from major Holdcos such as Dentsu, Hakuhodo DY Group, ADK, WPP, Publicis, and IPG, and act as a trusted advisor who ensures StackAdapt delivers measurable success across both managed and self-service engagements.

You'll collaborate closely with Account Executives, the Global Client Services (GCS) team, and cross-functional partners such as Ad Operations, Creative Strategy, and Data Analytics to optimize campaign ROI, build client trust, and identify growth opportunities.

What You'll Be Doing:

Client Strategy & Engagement

• Act as the primary point of contact for a portfolio of Japan-based Gold+ clients.
• Lead post-sales strategy including user adoption, campaign management, and account expansion.
• Build multi-threaded relationships with agency stakeholders across seniority levels.
• Proactively identify client needs, providing strategic counsel and data-driven insights to exceed performance goals.
• Lead Quarterly Business Reviews (QBRs), performance presentations, and client education sessions.

Campaign Management & Optimization

• Manage end-to-end campaign setup, including trafficking, third-party tag implementation, and pixel troubleshooting.
• Analyze campaign data to identify optimization opportunities and recommend data-backed solutions to improve ROI.
• Develop innovative campaign strategies leveraging StackAdapt's multi-channel capabilities (Display, Video, Native, Connected TV, DOOH, and Audio).
• Provide best practices for campaign design, attribution, and measurement using tools like Google Analytics, Tag Manager, and third-party ad servers.

Collaboration & Internal Leadership

• Work closely with Account Executives, GCS, and cross-functional teams to drive client success and retention.
• Lead internal initiatives to improve operational efficiency, share insights, and standardize optimization frameworks.
• Mentor junior Account Managers-supporting skill development, troubleshooting, and client strategy discussions.
• Contribute to team enablement by sharing optimization best practices and client success stories.

Account Growth & Retention

• Identify and execute upsell and cross-sell opportunities, driving account expansion through consultative selling.
• Monitor client business changes (e.g., funding rounds, acquisitions, leadership shifts) to uncover new growth areas.
• Manage renewals and deliver sustained quarter-over-quarter growth across your client base.
• Leverage insights to help clients discover new revenue opportunities before they do.

What You'll Bring to the Table

• 6+ years of experience in programmatic media buying, client success, or account management.
• Proven expertise in campaign optimization and performance strategy within DSPs or agency environments.
• Strong understanding of Japan's digital advertising ecosystem and Holdco organizational structures.
• Fluency in Japanese and English; ability to lead presentations and QBRs in both languages.
• Strong analytical mindset with the ability to craft insights from performance data.
• Excellent project management, prioritization, and communication skills.
• Willingness to travel (~20%) for client meetings and industry events. 

StackAdapter's Enjoy:

• Highly competitive salary
• Retirement/ 401K/ Pension Savings globally
• Competitive Paid time off packages including birthday's off!
• Access to a comprehensive mental health care program
• Health benefits from day one of employment
• Work from home reimbursements
• Optional global WeWork membership for those who want a change from their home office and hubs in London and Toronto
• Robust training and onboarding program
• Coverage and support of personal development initiatives (conferences, courses, books etc)
• Access to StackAdapt programmatic courses and certifications to support continuous learning
• An awesome parental leave program
• A friendly, welcoming, and supportive culture
• Our social and team events!

Please note: Benefits and perks may vary depending on your country of employment and the nature of your engagement. In locations where StackAdapt does not have a legal entity, employment and benefits are administered in accordance with local regulations and partner policies.

StackAdapt is a diverse and inclusive team of collaborative, hardworking individuals trying to make a dent in the universe. No matter who you are, where you are from, who you love, follow in faith, disability (or superpower) status, ethnicity, or the gender you identify with (if you're comfortable, let us know your pronouns), you are welcome at StackAdapt. If you have any requests or requirements to support you throughout any part of the interview process, please let our Talent team know.

We use artificial intelligence (AI) to streamline the resume reviews of candidates and assess their fit based on the criteria outlined in the job posting. We do not use AI to make any final hiring or interview decisions.

About StackAdapt

We've been recognized for our diverse and supportive workplace, high performing campaigns, award-winning customer service, and innovation. We've been awarded:

G2 Top Software for 2026

2026 Best Workplaces for Young Talent and in Canada by Great Place to Work

#1 DSP on G2 and leader in a number of categories including Cross-Channel Advertising

To learn more about our privacy practices, please see our Privacy Policy.

#LI-REMOTE