CareerPlanSign in

Software Engineer, Ads Backend

Shibuya, Tokyo, Japan💼 Full-time🗓 2026-08-28 → 2026-09-26

Core

Design and scale high-performance, sustainable advertising systems for a global news discovery platform serving millions of users.

Role type

Senior backend software engineer (ad delivery)

Builds

High-throughput ad delivery platform components including targeting, ranking, auction, and measurement systems.

Domain

AdTech / High-traffic web services

Deliverable

production ML models | product features

Required skills

Backend system design, high-traffic web service development, Java/Kotlin/Golang, Kafka, Redis, SQL, NoSQL databases

Preferred skills

AdTech industry experience, microservice/service mesh architecture, large-scale data processing, basic machine learning understanding

Technologies

Kafka, Redis, SQL, NoSQL, Java, Kotlin, Golang, C++, C#, Python, SpringBoot, MySQL, Hive, Spark, Flink, Docker, Kubernetes, AWS, Github

Responsibilities

Architect robust scalable online and offline backend systems, drive engineering efforts across core ad domains (Ranking, Premium Ads, Targeting, Measurement), collaborate with cross-functional teams including ML and Data Platform

Seniority

Mid-Senior, hands-on IC

Sourced via workable · Listed on CareerPlan, which tracks 70,000+ jobs from 20+ sources.