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

Appier
Tokyo, Japan
Full-time
You apply on Appier's own careers site

You’ll develop and operate backend services for Appier’s Ad Cloud Bidding systems in Tokyo. The role focuses on reliable, high-performance distributed services, including production support, incident response, and collaboration on system design.

Permanent
Hybrid
3+ years
Bachelor's or Master's Degree

Skills & Expertise

Modern C++ (C++11 and later)
Unix/Linux
System programming
Low-latency, high-throughput services
Performance tuning
Build systems
Operation automation tools

Key Responsibilities

Design, implement, and optimize backend services for Ad Cloud Bidding.

Support production deployments, monitoring, maintenance, and on-call incident response.

Review code and collaborate on system design with cross-functional teams.

Full Description

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 Senior Software Engineer, you will contribute to building scalable backend systems while also participating in service operation activities, including deployment, monitoring, and incident response, to ensure reliable and high-performing distributed services.

Responsibilities

• Design, implement, and optimize backend services

• Participate in code reviews and contribute to system design discussions

• Collaborate with cross-functional teams to deliver robust and high-performance systems

• Troubleshoot production issues and contribute to root cause analysis

• Support system deployment, monitoring, and maintenance in production environments

• Participate in on-call rotations and lead incident response when required

About You

[Minimum qualifications]

• BS/MS degree in Computer Science or related fields

• 3+ years of experience in software development

• Experience in modern C++ programming (C++11 and later)

• Familiar with Unix/Linux environments

• Good interpersonal and problem-solving skills and strong sense of ownership

[Preferred qualifications]

• Good 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

• Experience in modern build systems

• Experience in operation automation tools

[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.

#LI-SW1 #LI-Hybrid

Applications are handled on Appier's site