Senior Software Engineer, Backend Development(Ad Cloud Serving Services)

<p><span style="font-size: 12pt;"><strong>About Appier&nbsp;</strong></span></p> <p><span style="font-size: 12pt;">Appier (TSE: 4180) is an AI-native Agentic AI as a Service (AaaS) company that empowers businesses to create value through cutting-edge AdTech and MarTech solutions. Founded in 2012 with the vision of “Making AI Easy by Making Software Intelligent,” Appier helps businesses turn AI into ROI through its Ad Cloud, Personalization Cloud, and Data Cloud—each powered by Agentic AI that enables autonomous, adaptive, and real-time decision-making. Today, Appier operates 17 offices across APAC, the US, and EMEA, and is listed on the Tokyo Stock Exchange. Learn more at www.appier.com.</span></p> <h3><span style="font-size: 12pt;"><strong>About Ad Cloud&nbsp; Serving Services Team</strong></span></h3> <p><span style="font-size: 12pt;">At Appier's Ad Cloud Team Serving Services Team, we build and maintain the critical systems that power the core of Appier's advertising technology. These systems handle massive, high-concurrency, real-time requests, and ensure the stability, low latency, and high performance of our ad delivery. Our SRE professionals are crucial in guaranteeing these services remain reliable under extreme loads, continuously enhancing product availability and performance through innovation and automation</span>.</p> <h3><span style="font-size: 12pt;"><strong>Responsibilities</strong></span></h3> <ul> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><strong>Lead the design and development</strong> of scalable, high-performance, and reliable backend services for real-time ad recommendation, data serving, and core ad tech infrastructure.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><strong>Drive technical roadmap and ownership</strong> for sizable projects, ensuring the delivery of robust and efficient solutions within the Ad Cloud ecosystem.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><strong>Optimize critical system components</strong> for latency, throughput, and resource utilization, including database interactions (e.g., MongoDB sharding, ClickHouse optimizations) and network architecture.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><strong>Enhance system observability, incident management, and operational excellence</strong> by implementing comprehensive monitoring, alerting (e.g., Grafana, Prometheus), and refining production SOPs.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><strong>Collaborate closely with product managers and scientists</strong> to translate business requirements into technical designs and ensure seamless integration.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><strong>Champion code quality</strong> through rigorous code reviews and adherence to best practices in system design and implementation.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><strong>Mentor and guide junior engineers</strong>, fostering their growth in backend development best practices, distributed systems, and agile methodologies.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><strong>Actively participate in on-call rotation</strong> within the Backend team to maintain product reliability and scalability for critical serving services.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><strong>Contribute to a culture of continuous improvement</strong>, initiating team-level technical discussions, process enhancements, and knowledge sharing.</span></li> </ul> <h3><span style="font-size: 12pt;"><strong>About You</strong></span></h3> <p><span style="font-size: 12pt;">[Minimum Qualifications]</span></p> <ul> <li style="font-size: 12pt;"><span style="font-size: 12pt;">3-5+ years of hands-on experience in <strong>backend software development</strong>, particularly with high-performance, high-concurrency systems.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Proficient in one or more of the following languages: <strong>Go, Python</strong>.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Strong experience in <strong>system design and architecture for scalable and distributed systems</strong>, especially within a Linux environment.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Good understanding of <strong>Network API Design (e.g., RESTful APIs, gRPC)</strong> and experience with message queues (e.g., Kafka, Pub/Sub) for data pipelines.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Solid knowledge of <strong>SQL/NoSQL databases</strong> (e.g., MySQL, MongoDB, Redis, ClickHouse, PostgreSQL) and experience with database optimization and scaling strategies.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Familiarity with <strong>DevOps practices</strong>, including CI/CD pipelines, Docker, Kubernetes, and cloud platforms (AWS, GCP, or Azure).</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Experience with <strong>observability tools</strong> (e.g., Prometheus, Grafana) and robust monitoring and alerting implementation.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Proactive, excellent problem-solving skills, and strong communication in a cross-functional team setting.</span></li> </ul> <p><span style="font-size: 12pt;">[Preferred Qualifications]</span></p> <ul> <li style="font-size: 12pt;"><span style="font-size: 12pt;">BS/MS degree in Computer Science or a related field.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Demonstrated ability to <strong>refactor complex systems</strong>, improve performance metrics (e.g., latency, error rate, CPU usage), and optimize resource utilization.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Familiarity with <strong>A/B testing frameworks</strong> and supporting customizable configurations for model iteration.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Hands-on experience with <strong>deploying and serving machine learning models</strong> in production environments.</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Exposure to ad-tech or recommendation systems is a plus.</span></li> </ul> <p>&nbsp;</p> <p><span style="font-size: 12pt;">#LI-AK1</span></p>