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Infrastructure Engineer

4M JPY - ***M JPY

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Tokyo

Full-time (permanent)

Online Interview: Yes

Remote Work from Overseas: No / Remote Work in Japan: Yes

Top-Selling Points

Rate of Foreigners

Less Than

Frequency of English Usage

Less Than

Remote work Japanese learning support Plans for overseas expansion No dispatch

Related Skills

Cloud / Infrastructure / DevOps tools

AWS Google Cloud

Language Requirements

Required

Preferred

Job Description

[Job Description]
You will be responsible for the design, construction, operation, and maintenance of networks and servers in cloud environments such as AWS and Google Cloud (formerly GCP) for in-house systems.
Starting with server operation and maintenance, you will gradually be entrusted with infrastructure design and construction for new projects based on your skill level. You will also have the opportunity to propose AWS architecture and operational workflows, providing a high degree of autonomy in your work.

<Responsibilities>
■Server construction and maintenance for websites using WordPress on AWS (including web services, corporate sites, and landing pages)
■Infrastructure construction and maintenance for large-scale web services using the high-speed CMS environment "KUSANAGI"
■Infrastructure and server construction, as well as maintenance, for a customer management system operating on over 100 servers
■Upper-level tasks such as AWS architecture proposals and operational workflow improvements
■Middleware tuning (Apache, PHP, MySQL) according to the service requirements
■Implementation of automation and Infrastructure as Code (IaC) technologies
■Infrastructure construction for new projects targeting other departments and group companies
■Data infrastructure development using Google Cloud (BigQuery)

<Project Examples>
■Customer management system: AWS
■Emergency response service landing page: AWS / Google Cloud (formerly GCP)


[Department & Team]
Technical Support Division - Infrastructure Team
Team Size: 6 members (subject to change)

[Position Highlights]
■Unlimited access to AWS and Google Cloud (formerly GCP) accounts for testing all services
■Opportunity to become an expert in multi-cloud environments (AWS & Google Cloud)
■3–4 new projects per year, allowing involvement from the technology selection phase
■Gain hands-on experience managing large-scale traffic environments in existing projects


[Tech Stack]
■ Cloud Platforms: AWS, Google Cloud (formerly GCP)
■ OS: Linux (Amazon Linux / CentOS)
■ Web Servers: Apache (EC2, ECS, Fargate)
■ Database Servers: MySQL (Aurora), DynamoDB
■ Cache Servers: ElastiCache (memcached)
■ DNS: Route53
■ Serverless: Lambda, Batch, API Gateway
■ CDN: CloudFront
■ Data Analysis: BigQuery, Cloud Storage, Compute Engine, Cloud Run
■ Programming Languages: PHP, Python, ShellScript
■ Local Development: Docker, VirtualBox
■ Version Control: GitHub, CodeCommit
■ CI/CD: GitHub Actions, CodePipeline
■ Monitoring: Mackerel, PagerDuty, Zabbix
■ Project Management: Backlog
■ Collaboration Tools: Chatwork, Google Workspace

[Foreign Engineer Community]
■Our company has a diverse team with members from various countries, including China, South Korea, Vietnam, Taiwan, the Philippines, Mongolia, and Thailand.
■Communication for this position is primarily with in-house employees, with minimal interaction with external clients.
■Business-level Japanese proficiency (both spoken and written) is required for this role.
This is a great environment for those looking to improve their Japanese language skills further!


[Why Join Coretech?]
■Work Environment & Work-Life Balance>
- High autonomy and flexibility due to in-house infrastructure management
- Average monthly overtime: Less than 8 hours
- No client-site work—focus solely on in-house systems and services
- Remote work policy:
Full in-office attendance required during the onboarding period
Partial remote work available after onboarding, depending on project requirements
(On-call support: Once or twice a month (on a rotating basis), with extensive failure prevention measures in place)

■Career Growth & Development
- Diverse career paths with ample growth opportunities
- Support for book purchases, Udemy courses, and certifications
- Expanding company with increasing projects from group companies
- Established industry presence with a strong foundation for overseas expansion and new initiatives
- Small-scale specialization model, allowing engineers to focus on their preferred technical domains and build expertise

■Culture & Team Environment
- A culture of mutual support is deeply rooted within the company, creating an environment where team members assist each other in both growth and daily operations.
- Flat and open communication, making it easy to discuss challenges and seek advice

Required Skills and Experiences

■Mandatory Requirements ・1+ years of working experience in building and operating web services using AWS (EC2, RDS (Aurora), WAF, CloudFront, Lambda, etc.) or Google Cloud. └ Practical work experience in Japan is assumed. └Experience in building multiple projects is assumed ■Preferred Requirements ・Experience in server construction, operation and maintenance using KUSANAGI (WordPress) environment ・Experience in building, operating, and maintaining mail servers ・Experience with Infrastructure as Code (TerraForm, etc.) ・Experience in middleware tuning (Apache, PHP, MySQL, Postfix, etc.) ・Experience in design/configuration, operation and maintenance of monitoring systems (Zabbix, Nagios, AWS CloudWatch, etc.) ・Experience in building, operating, and maintaining AWS serverless services (Lambda, ECS, Fargate, etc.) ・Experience with container technologies (Docker, etc.) ・Experience with GCP (GCE, CloudSQL, BigQuery, CloudRun, etc.) ・Programming experience (Python, PHP, javascript, etc.) ■Desired Candidate Profile ・Willing to be involved in the upstream process as an infrastructure engineer ・Have initiative and positive attitude ・Able to work well with other teams and communicate well with them ・Able to work with care and discretion

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Working Condition

■Employment Type
Permanent employee. Probation period: 3 months

Work Location
Sumitomo Fudosan Aobadai Tower 14F, 3-6-28 Aobadai, Meguro-ku, Tokyo
If you come to the office, the interview room is on the 13th floor.

<Access>
5 minutes from Shibuya Station by direct shuttle bus or 15 minutes on foot.
Tokyu Denentoshi Line Ikejiri-Ohashi Station (East Exit) 7 min. walk
9 minutes walk from South Exit of Shinsen Station on Keio Inokashira Line

■Expected Annual Salary
4.1 million yen to 6.5 million yen
└Monthly salary: 320,000 yen to 500,000 yen (including fixed overtime) + various allowances + performance bonus (with adjustment in the first year)

*Preferential treatment in accordance with our company's regulations, taking into consideration experience, skills, etc.
*Fixed overtime pay is 30 hours (65,100-101,700 yen) regardless of whether or not overtime is worked.
*Overtime work in excess of the above will be paid additionally.

・Bonus: Twice a year (June and December)
*Performance bonus (paid annually)

・Salary increase: Twice a year (June and December)


■Working Hours
<Working hours>
10:00 - 19:00 (working hours: 8 hours and 0 minutes)
*Staggered work hours (7:00-12:00) are allowed up to once a week.

<Overtime hours>
Less than 8 hours on average

■Benefits and Welfare
Commuting allowance (maximum 30,000 yen/month) / childcare allowance (5,000 yen/month for children up to 18 years old) / congratulatory or condolence money / seminar fee / book purchase fee / position allowance / overtime allowance (for overtime work) / home allowance / full social insurance (Kanto ITS membership) / medical checkup (over the legal limit) / visiting industrial physician (former system engineer) / rehiring Retirement allowance / Shortened working hours (until the child graduates from elementary school) / Qualification assistance system (also available for applicants with job offers) / Udemy / Birthday gift (gift certificate) / Free dress and hairstyle / Company events (company trip, etc. / optional participation) / Free water server and coffee / Office Glico (in-house convenience store) / Refreshment room / Complete separation of smoking and non-smoking / Benefit station (various preferential services) / Preferential treatment at famous theme parks


■Holidays and Leave
★126 days off per year (average of the last 3 years)
2 days off per week (Sat. and Sun.) / National holidays / Summer vacation (5-6 days) / Year-end and New Year vacation (7-8 days) / Paid vacations / Start day off (1 day every year in the month of joining) / Refresh vacation (9 consecutive holidays after 5 years of service) / Welcome support leave (granted upon joining) / Condolence leave / Maternity leave / Jury leave / Childcare leave / Child nursing leave (can be taken in hour units) / Family care leave Childcare leave / Child nursing care leave (hourly basis also available) / Nursing care leave (hourly basis also available) / Menstrual leave

RECRUITMENT PROCESS

Document Screening
↓
1st Interview (Online)
↓
Aptitude Test
↓
Final Interview (Primarily In-Person)
*Online interviews may be considered depending on circumstances.

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