Tokyo Appier
About Appier

Appier is a software-as-a-service (SaaS) 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:
Visit for more information.

About The Role


Software engineers (Ad Cloud Bidding) at Appier Tokyo office build a wide range of platforms and services that interconnect data and AI with our customers and users.

As a Staff Software Engineer, you will play a critical role in designing and building scalable and performant backend architecture, owning and driving the technical roadmap for sizable projects or services.

You will also take responsibility for service operations – ensuring reliability, availability, and efficient deployment of large-scale distributed systems.

Responsibilities

Engage in the design of large-scale backend systems and distributed services
Contribute to technical roadmap and planning
Collaborate with cross-functional teams to deliver robust and high-performance systems
Troubleshoot production issues and contribute to root cause analysis
Ensure high reliability through best practices in service operation, monitoring, and deployment
Participate in on-call rotations and lead incident response when required

About You

[Minimum qualifications]

8+ years of experience in software development
Proficient in modern C++ programming (C++11 and later)
Familiar with Unix/Linux environments
Solid understanding of system programming
Experience in developing low-latency (millisecond-scale) and high-throughput (>1K QPS per machine) systems
Experience in service optimization and performance tuning
Strong sense of ownership and good problem-solving skills

[Preferred qualifications]

Experience in modern build systems
Experience in operation automation tools
Experience with monitoring, logging, and alerting frameworks

[Language]

Fluent in English or Chinese.

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.

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