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Full-Stack Java Engineer (Ad Tech Platform, Tokyo)
| Location | Tokyo - 23 Wards |
| Job Type | Temporary |
| Salary | 6 million yen ~ 8 million yen |
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.
Client Details
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.
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
Job 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
To apply online please click the 'Apply' button below. For a confidential discussion about this role please contact Serena Wu on +81 3 6627 6137.
General Requirements
| Minimum Experience Level | No experience |
| Career Level | Mid Career |
| Minimum English Level | Fluent |
| Minimum Japanese Level | Basic |
| Minimum Education Level | Bachelor's Degree |
| Visa Status | Permission to work in Japan required |
Required Skills
- 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)
- 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
- 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
Job Location
- Tokyo - 23 Wards
Work Conditions
| Job Type | Temporary |
| Salary | 6 million yen ~ 8 million yen |
| Industry | Software |
