Senior Java Engineer - Tech lead - (PSR-8285)
Senior Java Engineer - Tech lead - (PSR-8285)
Job type:
Haken
Specialization:
Software/Web Development
Language Level:
English Level - Advanced (TOEIC 860), Japanese Level - None
Location:
Futako-Tamagawa
Salary:
¥4,600 - ¥5,600 Hourly
Job Reference:
504659
A Global IT firm is looking for a Senior Application Engineer for its Payment Platform Section.
Responsibilities:
- Lead basic design for new features and PSP integrations, including: Software architecture, Component design, Database schema design
- Establish and maintain clear design guidelines and coding standards
- Develop, test, and deploy production-grade Java applications end-to-end
- Review system designs before implementation to identify structural issues early
- Conduct code reviews focusing on correctness, maintainability, and security
- Provide clear, actionable feedback that explains the reasoning (“why”), enabling team learning
- Identify recurring issues and convert them into documented guidelines to prevent repetition
- Support engineers and team leads by aligning design intent with implementation
- Act as a bridge between leadership and engineers to improve consistency and reduce friction
- Raise the overall engineering standard through hands-on guidance and example
Required skills:
- 8+ years of experience in Java development
- Proven experience delivering production systems in high-traffic, transaction-critical environments
- Strong ability to independently lead basic design (architecture, components, database schema)
- Solid experience in code reviews and enforcing coding standards across teams
- Ability to quickly understand unfamiliar codebases and assess structure and risks
Why should you apply:
- This is a long-term opportunity with a chance to become a permanent employee
- You will be working with international team members
- Free breakfast, lunch and dinner at the cafeteria
Company Details:
A global company with a strong presence in multiple business areas. It has achieved sustained growth both domestically and internationally, including in the U.S. and Europe. The company boasts a diverse and international environment and is committed to equal opportunity, offering a wealth of career opportunities. Due to the diverse nature of our business, we handle a wide range of technologies! You can also choose the environment you are most comfortable with, such as Windows/Mac! Meals in the company cafeteria are also free. Our chefs are always coming up with new menu items, so you can enjoy your meal without getting bored!
Working hours: 9:00 - 17:30 (Mon-Fri)
Working Style: Hybrid (4 days in office, 1 day work from home)
Holidays: Saturday, Sunday, and National Holidays, Year-end and New Year Holidays, Paid Holidays, Other Special Holidays
Services/Benefits: Social insurance, DC Pension Plan, Transportation Fee, Skillhouse University, Test payback system, and more
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