Back to search

Full-Stack Java Engineer (Ad Tech Platform, Tokyo)

Tokyo 23 Wards Temporary ¥6,000,000 - ¥8,000,000 per year Foreign Multinational View Job Description
Join a high-impact engineering team developing large-scale advertising platforms that power a major digital ecosystem. This role offers hands-on ownership across design, development, and deployment while collaborating with global teams.
  • Build scalable ad platforms used across a massive digital ecosystem
  • Own design through delivery in a global, cross-border team

About Our Client

A leading global internet services company with a large-scale digital ecosystem, operating one of the region's most advanced advertising platforms. The organization focuses on delivering high-performance marketing solutions and continues to invest in innovative ad technologies across international markets.

Job Description

  • Gather and analyze business requirements and convert them into technical specifications
  • Design systems and contribute to architecture decisions (basic design level)
  • Develop, test, and maintain full-stack applications using Java and related technologies
  • Conduct code reviews and ensure adherence to coding standards and quality practices
  • Perform unit testing, validation, and support deployments across environments (DEV/STG/PROD)
  • Monitor systems post-release and conduct ongoing maintenance
  • Collaborate closely with project managers, architects, QA, and DevOps teams
  • Work effectively within cross-cultural and international development teams
  • Proactively identify improvement opportunities in systems and processes
  • Stay ahead of emerging technologies, including AI tools, and recommend adoption strategies



The Successful Applicant

  • 5+ years of software development experience as a Software Engineer
  • Strong system design and hands-on development capability
  • Proven experience in Agile/Scrum environments
  • Excellent problem-solving and analytical skills
  • Strong ownership mindset with proactive attitude
  • Effective communication skills with both technical and non-technical stakeholders
  • Experience using AI-assisted development tools (e.g., GitHub Copilot or similar)

Technical Skills (Required):

  • Java (Spring Boot, Batch)
  • MySQL and NoSQL (e.g. MongoDB)
  • Cloud/data technologies (e.g. GCS, BigQuery, DataProc or equivalents)
  • Kafka or similar messaging platforms
  • Git for version control
  • Jira or equivalent project management tools

Preferred Skills:

  • Big data technologies (Hadoop, Hive, Spark, Presto, etc.)
  • Frontend frameworks (React, Angular)
  • Additional NoSQL databases (Cassandra, Redis, Couchbase)
  • CI/CD tools such as Jenkins
  • Test automation (JUnit), code quality tools (Sonar)
  • BI tools (Tableau, MicroStrategy)
  • Experience in enterprise system or data pipeline architecture design


What's on Offer

  • Opportunity to work on large-scale, high-traffic ad platforms
  • Exposure to global, cross-functional engineering teams
  • Hands-on ownership across the full development lifecycle



Contact
Serena Wu
Quote job ref
JN-072026-7057688
Phone number
+81 3 6627 6137

Job summary

Function
IT
Specialisation
Programming / Development
Specialisation
Technology & Telecoms
Location
Tokyo 23 Wards
Job Type
Temporary
Consultant name
Serena Wu
Consultant phone
+81 3 6627 6137
Job Reference
JN-072026-7057688
Company Type
Foreign Multinational

Diversity & Inclusion at Michael Page

We don't just accept difference - we celebrate it. We encourage applicants from all backgrounds to apply for this role and are committed to building inclusive, diverse workplaces where everyone can thrive. If you require any support or reasonable adjustments during the recruitment process, please let us know.