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Appier

Senior Machine Learning Scientist (Ad Cloud, RTB) - Tokyo,Japan

Tokyo, Japan
Level
Senior
Visa
Sponsors visas

Not stated in the posting: salary, work type.

Open. First seen 2 October 2026.

Apply on the company's site →

About the role

About Appier

Appier is an AI-native Agentic AI as a Service (AaaS) company that uses artificial intelligence (AI) to power business decision-making. Founded in 2012 with a vision of democratizing AI, Appier’s mission is turning AI into ROI by making software intelligent. Appier now has 17 offices across APAC, Europe and U.S., and is listed on the Tokyo Stock Exchange (Ticker number: 4180). Visit www.appier.com for more information.

Open to overseas candidates/Visa Support

This position is based in Tokyo, Japan. For international candidates, Appier's Japan office provides visa sponsorship to ensure a smooth transition to Japan.

The Impact You’ll Make at Appier

Appier is seeking a Senior Machine Learning Scientist to join our Advertising Cloud Optimization team, which leads the development of core machine learning algorithms driving campaign efficiency and advertiser ROI. Our programmatic advertising platform operates at a massive scale, handling over multi millions queries per second (QPS), all powered by our proprietary deep learning models for bidding, pricing, and personalized content delivery.

In this role, you’ll further improve bidding strategies, audience targeting and creative optimization by deep-diving RTB ecosystem including SSP/DSP/MMP to design the strategy, enhancing user signals or applying advanced deep learning model

What You’ll Work On

  • Deep-dive the RTB ecosystem to identify the potential direction and decide the bidding strategy
  • Leverage advance deep learning model to improve bidding/audience model performance
  • Co-work with teams to improve real-time/long-term user interaction signal collection and to further improve model performance

What We’re Looking For

  • Master’s or PhD’s degree in Computer Science, Machine Learning, Statistics, or related field.
  • 3+ years of industry experience on RTB ecosystem
  • Proficiency in Python and SQL experience with modern ML frameworks and deep learning model (PyTorch, TensorFlow, etc.).
  • Strong ownership and collaboration skills.

#LI-AK1

What this role asks for

Particular to this role

TensorFlow

Rare in Appier's other 43 open postings.

Standard for data science / ML roles

Machine Learning · PyTorch · SQL

Common in data science / ML postings at any company.

In most of Appier's ads

Python

Named in most of its open postings, whatever the role.

Read against Appier's other open postings on this site.

The team: Scientist HIRES STEADILY

This role is one of 12 open in Scientist. 1 was posted in the last 30 days and the oldest in January: a team that hires all year rather than one being built.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

Python (11 of 12), Machine Learning (10 of 12), PyTorch (8 of 12), SQL (7 of 12), Deep Learning (6 of 12), LLM (6 of 12), TensorFlow (6 of 12)

OTHER ROLES ON THIS TEAM

From the team and dates on Appier's own job board.

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