Staff Software Engineer, C++ Backend Development (Ad Cloud Bidding) - Tokyo Relocation required

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.

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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