Web Application Engineer & Project Manager (Nihonbashi, Tokyo)

Job Description

Web Application/System Engineer & Project Manager

Company: Not specified
Location: Nihonbashi Ningyocho, Chuo-ku, Tokyo, Japan
Employment Type: Full-Time
Industry: IT (Open/Web Development)

Job Overview

Responsible for project management, system architecture, API optimization, and third-party integrations. Work closely with internal and external teams to ensure performance, reliability, and scalability of web applications.

Key Responsibilities:

• Assist with project management and product/business requirement analysis
• Design system architecture and data structures based on product needs
• Optimize API performance
• Upgrade technical architecture of existing products
• Introduce new technologies to the development team
• Prepare technical documentation
• Collaborate with third-party platforms and game operators
• Plan and execute third-party integrations with internal teams
• Track and manage integration progress and resolve technical issues
• Analyze third-party game performance and propose optimizations

Requirements

• 1+ year of programming experience
• Proficient in Java 8/11/21, Spring Framework
• Experience with JPA, MyBatis, JUnit, REST APIs
• Familiarity with Oracle 11g/12c or other RDBMS
• Fluent in Chinese (listening/reading/writing) and English (reading/writing)

Preferred Skills:

• Experience with Redis, Kafka, Jenkins
• Knowledge of AWS/GCP, Kubernetes (K8S)
• Familiarity with microservices, big data, event systems, e-commerce systems

Working Hours

• Monday–Friday, 10:00–19:00 (1-hour break)
• Hours may vary depending on project

Salary & Benefits

• Annual salary: ¥6.5M – ¥9M
• Full social insurance (health, employment, welfare, labor)
• Visa support for overseas talent
• Annual bonuses & raises
• Transportation allowance: up to ¥20,000/month
• Skill development programs, domestic/international training
• Internal events (year-end parties, tea breaks, excursions)
• Free drinks/snacks, team-building events

Holidays:

• Full 2-day weekend (Sat/Sun)
• National holidays, New Year holidays
• Paid leave, sick leave, prenatal/postnatal leave
• Childcare, bereavement, marriage, menstrual leave

Nearest Stations:

• 2 min walk: Ningyocho Station (Tokyo Metro Hibiya Line / Toei Asakusa Line)
• 7–8 min walk: Suitengumae, Bakuroyokoyama, Hamacho, Kodenmacho